TWI781371B - Adhesive sheet, method for producing adhesive sheet, method for producing intermediate laminate, and intermediate laminate - Google Patents

Abstract

The adhesive sheet 1 of the present invention includes a first adhesive layer 2 , a substrate 3 arranged on one side of the first adhesive layer 2 , and a second adhesive layer 4 arranged on one side of the substrate 3 . The first adhesive layer 2 includes an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light. The average transmittance of active light rays of the substrate 3 and/or the second adhesive layer 4 is 15% or less.

Description

Adhesive sheet, method for producing adhesive sheet, method for producing intermediate laminate, and intermediate laminate

The present invention relates to an adhesive sheet, a method for manufacturing the adhesive sheet, a method for manufacturing an intermediate laminate, and an intermediate laminate. Specifically, it relates to an adhesive sheet, a method for manufacturing the adhesive sheet, and an adhesive sheet using the The manufacturing method of the obtained intermediate laminate, and the intermediate laminate obtained by the manufacturing method of the intermediate laminate.

In recent years, displays equipped with organic EL (Electroluminescence, electroluminescence) panels have been known. The organic EL panel has a highly reflective electrode layer, so it is easy to produce external light reflection or background reflection.

In addition, it is known to provide a layer having a function of absorbing light on the reflective surface of the electrode layer in order to prevent external light reflection or background reflection.

As such a layer, a light-absorbing layer containing a carbon black pigment and a dye has been proposed (for example, refer to Patent Document 1). [Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2017-203810

[Problem to be solved by the invention]

On the other hand, when the layer having the function of absorbing light is an adhesive layer, transparency may be required from the viewpoint of inspection or the like.

In such a case, a method of including a compound colored by an acid and a photoacid generator in an adhesive layer has been studied.

When such an adhesive layer is irradiated with active light, an acid is generated from the photoacid generator, and the compound is colored by the acid.

That is, in this adhesive layer, the function of absorbing light can be given by coloring an adhesive layer by irradiating active light at arbitrary timing.

However, in such an adhesive layer, depending on the purpose and use, there may be cases where it is desired to leave the colored part transparent, or the coloring amount may be less than that of the colored part.

In this case, if the colored part is exposed to external light (active light), the part to be left transparently will be colored, and the coloring amount of the part that is intended to be less than the colored part will be increased. Condition.

The present invention provides an adhesive sheet capable of coloring a first adhesive layer by irradiating active light rays at any point of time and suppressing coloring by external light (active light rays) other than the colored portion, a method for producing the adhesive sheet, and an adhesive sheet using the adhesive sheet. A method for producing an intermediate laminate obtained from the sheet, and an intermediate laminate obtained by the method for producing the intermediate laminate. [Technical means to solve the problem]

The present invention [1] is an adhesive sheet comprising a first adhesive layer, a base material disposed on one side of the first adhesive layer, and a second adhesive layer disposed on one side of the base material, the first adhesive layer Contains an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light, and the average transmittance of active light on the substrate and/or the second adhesive layer is 15% or less.

The present invention [2] includes the adhesive sheet described in the above [1], wherein the first adhesive layer comprises an adhesive composition capable of reducing the transmittance of visible light at a wavelength of 550 nm by irradiation of ultraviolet rays, and the substrate And/or the second adhesive layer has an average transmittance of not more than 15% at a wavelength of not less than 300 nm and not more than 400 nm.

The present invention [3] includes the adhesive sheet according to technical solution 2, characterized in that: the average transmittance of the substrate and/or the second adhesive layer at a wavelength of 400 nm or more and 700 nm or less is 50% or more.

The present invention [4] includes the adhesive sheet according to the above [2] or [3], wherein the base material and/or the second adhesive layer contain an ultraviolet absorber.

The present invention [5] includes the adhesive sheet described in any one of the above-mentioned [1] to [4], wherein the above-mentioned adhesive composition comprises an adhesive polymer as a polymer of a monomer component, an adhesive polymer colored by an acid compounds, and photoacid generators.

The present invention [6] is a method of manufacturing an adhesive sheet, which includes the following steps: a first adhesive layer preparation step, which is to prepare an adhesive layer that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light rays. The adhesive layer of the composition; the step of arranging the substrate, which is to arrange the substrate on one side of the first adhesive layer; and the step of arranging the second adhesive layer, which is to arrange the second adhesive layer on one side of the above-mentioned substrate; and the above-mentioned substrate The average transmittance of the active light rays of the material and/or the second adhesive layer is 15% or less.

The present invention [7] includes the method for producing an adhesive sheet according to the above [6], wherein the first adhesive layer is irradiated with active light after the step of preparing the first adhesive layer and before the step of arranging the substrate.

The present invention [8] includes the method for producing an adhesive sheet according to the above [6], wherein the first adhesive layer is irradiated with active light rays after the step of arranging the second adhesive layer.

The present invention [9] includes a method of manufacturing an intermediate laminate, which includes the following steps: a preparation step of preparing an adhesive sheet manufactured by the method of manufacturing an adhesive sheet as described in the above [8]; an irradiation step, It is to irradiate the above-mentioned first adhesive layer with active light to form a high-irradiation portion with a relatively high amount of active light on the above-mentioned first adhesive layer, and a non-irradiated portion with a relatively low amount of active light or no active light. /Low irradiated part, so that the visible light transmittance at the wavelength of 550 nm of the above-mentioned high-irradiated part is smaller than the visible light transmittance of the above-mentioned unirradiated/low-irradiated part at a wavelength of 550 nm; and a bonding step, which is to attach the above-mentioned adhesive sheet The other side of the material is attached to the adherend.

The present invention [10] includes the manufacturing method of the intermediate laminate described in the above [9], wherein the irradiation step is carried out after the preparation step, and the bonding step is carried out after the irradiation step.

The present invention [11] includes the manufacturing method of the intermediate laminate described in the above [9], wherein the bonding step is carried out after the preparation step, and the irradiation step is carried out after the bonding step.

The present invention [12] is a method for producing an intermediate laminate according to the above [10], wherein in the irradiating step, the first adhesive layer is irradiated with active light from the surface side of the second adhesive layer.

The present invention [13] is a method for producing an intermediate laminate according to the above [11], wherein in the irradiating step, the first adhesive layer is irradiated with active light from the surface side of the second adhesive layer.

The present invention [14] includes the manufacturing method of the intermediate laminate described in claim [10], wherein in the irradiation step, the first adhesive layer is irradiated with active light from the surface side of the first adhesive layer.

The present invention [15] includes the method for producing an intermediate laminate according to the above [11], wherein in the irradiation step, the first adhesive layer is irradiated with active light from the surface side of the adherend.

The present invention [16] includes the method for producing an intermediate laminate as described in the above [15], wherein the average transmittance of the active light rays of the above-mentioned adherend is 60% or more, and in the above-mentioned irradiation step, in the above-mentioned adherend A part of the other surface of the side is provided with a mask for blocking active light rays, and then the above-mentioned first adhesive layer is irradiated with active light rays.

The present invention [17] includes the manufacturing method of the intermediate laminate described in the above [15], wherein the above-mentioned adherend blocks active light rays, and in the above-mentioned bonding step, the above-mentioned adherend is arranged on the above-mentioned adhesive sheet part of the other side.

The present invention [18] includes the method for producing an intermediate laminate as described in any one of the above [9] to [17], wherein the above-mentioned unirradiated/low-irradiated portion is an unirradiated portion that is not irradiated with active light, and the above-mentioned unirradiated The visible light transmittance of the irradiated part at a wavelength of 550 nm is above 80%.

The present invention [19] includes the method for producing an intermediate laminate as described in any one of the above [9] to [16], wherein the above-mentioned unirradiated/low-irradiated portion is a low-irradiated portion with a low amount of active light rays, and the above-mentioned irradiated The steps include: a first irradiating step, which is to irradiate the first adhesive layer with active light after arranging a first mask that blocks the active light, so as to form a first irradiated portion on the first adhesive layer that is irradiated with active light , and the temporarily unirradiated part that has not been irradiated with the active light; and the second irradiation step, which is to treat the above-mentioned temporary mask in the above-mentioned first adhesive layer after the second mask that blocks the active light is arranged on the above-mentioned first irradiation part. The unirradiated part is irradiated with active light, so that the above-mentioned temporarily unirradiated part is formed into the second irradiated part; Irradiated part.

The present invention [20] includes the method for producing an intermediate laminate as described in any one of the above [9] to [16], wherein the above-mentioned non-irradiated/low-irradiated portion is a low-irradiated portion with a low irradiation amount of active light, and the above-mentioned irradiated The steps include: a third irradiating step of forming the entire first adhesive layer as a third irradiated portion irradiated with active light by irradiating the entire first adhesive layer with active light; and a fourth irradiating step , by irradiating the remaining part of the third irradiation part with active light rays after arranging a mask for blocking active light rays on a part of the third irradiation part, so that the remaining part of the third irradiation part is formed into a fourth irradiation part; and the third irradiated part is the low irradiated part, and the fourth irradiated part is the high irradiated part.

The present invention [21] includes the manufacturing method of the intermediate laminate described in the above [19], wherein the visible light transmittance at the wavelength of 550 nm of the above-mentioned high-irradiation part is less than 20%, and the transmittance of visible light at the wavelength of 550 nm of the above-mentioned low-irradiation part is The visible light transmittance is not less than 20% and not more than 70%.

The present invention [22] is an intermediate laminate comprising: an adhesive sheet comprising a first adhesive layer, a base material disposed on one side of the first adhesive layer, and a second adhesive disposed on one side of the base material. layer; and an adherend, which is arranged on the other side of the above-mentioned adhesive sheet; the above-mentioned first adhesive layer has a high light transmittance part with a relatively large visible light transmittance at a wavelength of 550 nm, and a visible light transmittance at a wavelength of 550 nm Relatively small parts with low light transmittance, and the average transmittance of the active light of the above-mentioned base material and/or the second adhesive layer is 15% or less.

The present invention [23] includes the intermediate laminate described in the above [22], wherein the low light transmittance portion has a pattern shape.

The present invention [24] includes the intermediate laminate described in the above [22] or [23], wherein the visible light transmittance at a wavelength of 550 nm of the above-mentioned high light transmittance portion is 80% or more.

The present invention [25] includes the intermediate laminate as described in the above [22] or [23], wherein the visible light transmittance at a wavelength of 550 nm of the above-mentioned low light transmittance part is less than 20%, and the wavelength of the above-mentioned high light transmittance part is Visible light transmittance at 550 nm is not less than 20% and not more than 70%. [Effect of Invention]

In the adhesive sheet of the present invention, the first adhesive layer includes an adhesive composition capable of reducing the transmittance of visible light at a wavelength of 550 nm by irradiation with active light.

Therefore, the first adhesive layer can be colored by irradiating actinic light at an arbitrary point of time, thereby imparting a light-absorbing function.

Moreover, in this adhesive sheet, the average transmittance of active light rays of a base material and/or a 2nd adhesive layer is 15% or less.

Therefore, when it is desired to leave transparently other than the colored portion in the first adhesive layer, or to make the amount of coloring smaller than that of the colored portion, it is possible to suppress coloring of the colored portion by external light (active light).

The manufacturing method of the adhesive sheet of the present invention comprises the following steps: a base material disposing step, which is to dispose the base material on one side of the first adhesive layer; and a second adhesive layer disposing step, which is to dispose the second adhesive layer on one side of the base material. Floor.

Therefore, when it is desired to leave transparently other than the colored portion in the first adhesive layer, or to make the amount of coloring smaller than that of the colored portion, it is possible to suppress coloring of the colored portion by external light (active light).

The manufacturing method of the intermediate laminate of the present invention includes a preparatory step of preparing the adhesive sheet of the present invention.

Therefore, the intermediate laminate obtained by the method for producing the intermediate laminate can suppress coloring by external light (acting light) other than the colored portion (non-irradiated/low-irradiated portion).

In the intermediate laminate of the present invention, the average transmittance of active light rays of the substrate and/or the second adhesive layer is 15% or less.

Therefore, coloring by external light (active light rays) other than the colored portion (low light transmittance portion) can be suppressed.

1. Adhesive sheet As shown in FIG. 1A, the adhesive sheet 1 has a film shape (including a sheet shape) having a specific thickness, extends in a direction (plane direction) perpendicular to the thickness direction, and has a flat upper surface and a flat lower surface. .

Specifically, the adhesive sheet 1 includes a first adhesive layer 2 , a substrate 3 arranged on one surface of the first adhesive layer 2 , and a second adhesive layer 4 arranged on one surface of the substrate.

In addition, the average transmittance of the base material 3 and/or the second adhesive layer 4 at a wavelength of 300 nm or more and 400 nm or less is in a specific range.

That is, the base material 3 and/or the second adhesive layer 4 have active ray absorptivity.

Examples of the active light rays include ultraviolet rays, visible light, infrared rays, X-rays, α rays, β rays, and γ rays, and preferred examples include ultraviolet rays from the viewpoint of diversity of equipment used and ease of handling.

In addition, ultraviolet rays mean electromagnetic waves in a wavelength range of not less than 1 nm and not more than 400 nm.

That is, the substrate 3 and/or the second adhesive layer 4 preferably have ultraviolet absorbing properties.

If the base material 3 and/or the second adhesive layer 4 have active ray absorbing properties, when it is desired to leave the colored portion in the first adhesive layer 2 transparently, or to make the amount of coloring less than that of the colored portion In this case, coloring by external light (ultraviolet rays) other than the colored part can be suppressed.

In detail, as shown in FIG. 1B, only the base material 3 has active ray absorptivity, or, as shown in FIG. 1C, only the second adhesive layer 4 has active ray absorptivity, or, as shown in FIG. 1D, the base material 3 and the second adhesive layer 4 both have active light absorptivity.

It is preferable that both the base material 3 and the second adhesive layer 4 have actinic ray absorptivity from the viewpoint of reliably suppressing coloration by external light (actinic ray).

Each layer constituting the adhesive sheet 1 will be described below.

1-1. Adhesive layer The first adhesive layer 2 is the upper layer of the adhesive sheet 1 .

The first adhesive layer 2 is a pressure-sensitive adhesive layer for bonding the adhesive sheet 1 to the adherend 15 (described below).

The first adhesive layer 2 has a film shape extending in the surface direction, and has a flat plane and a flat lower surface.

The first adhesive layer 2 includes an adhesive composition (hereinafter referred to as the first adhesive composition) capable of reducing the visible light transmittance at a wavelength of 550 nm by irradiation with active light rays.

Therefore, the first adhesive layer 2 can be colored by irradiating the first adhesive layer 2 with actinic light at any point of time, whereby the function of absorbing light can be imparted.

Also, the first adhesive layer 2 preferably includes an adhesive composition that can reduce the visible light transmittance at a wavelength of 550 nm by irradiation of ultraviolet rays.

Furthermore, the type of active light that can reduce the visible light transmittance of the first adhesive composition at a wavelength of 550 nm is the following type of photoacid generator (specifically, the active light that generates acid from the photoacid generator) wavelength) is determined.

The first adhesive composition contains an adhesive polymer, a compound colored by an acid, and a photoacid generator.

If the first adhesive composition includes an adhesive polymer, a compound colored by an acid, and a photoacid generator, the wavelength of the first adhesive layer 2 can be reliably adjusted by irradiation with active light rays (preferably ultraviolet rays). Visible light transmittance at 550 nm is reduced.

Adhesive polymers are formulated to impart adhesive properties.

Adhesive polymer-based monomer components (described below) polymers, such as acrylic polymers, polysiloxane-based polymers, urethane-based polymers, rubber-based polymers, etc., optical transparency , adhesiveness, and control of storage modulus, preferably acrylic polymers may be mentioned.

The acrylic polymer is obtained by polymerization of a monomer component containing an alkyl (meth)acrylate as a main component.

Alkyl (meth)acrylate acrylates and/or methacrylates, for example, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, (meth)acrylate Butyl acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate, isobutyl (meth)acrylate, second butyl (meth)acrylate, third butyl (meth)acrylate, Amyl (meth)acrylate, Isoamyl (meth)acrylate, Neopentyl (meth)acrylate, Hexyl (meth)acrylate, Heptyl (meth)acrylate, 2-ethyl (meth)acrylate Hexyl (meth)acrylate, octyl (meth)acrylate, isooctyl (meth)acrylate, nonyl (meth)acrylate, isononyl (meth)acrylate, decyl (meth)acrylate, (meth) Isodecyl Acrylate, Undecyl (Meth)acrylate, Lauryl (Meth)acrylate, Isotridodecyl (Meth)acrylate, Tetradecyl (Meth)acrylate ester, isotetradecyl (meth)acrylate, pentadecyl (meth)acrylate, cetyl (meth)acrylate, heptadecyl (meth)acrylate, (meth)acrylate ) octadecyl acrylate, isostearyl (meth)acrylate, nonadecyl (meth)acrylate, eicosyl (meth)acrylate and other linear or branched C1-20 alkyl (meth)acrylate, etc., Preferably, C4-12 alkyl (meth)acrylate is mentioned, More preferably, butyl acrylate is mentioned.

Alkyl (meth)acrylate can be used individually or in combination of 2 or more types.

The blending ratio of the alkyl (meth)acrylate is, for example, 50 mass % or more, preferably 60 mass % or more, and, for example, 99 mass % or less with respect to the monomer component.

Moreover, it is preferable that a monomer component contains the acidic vinyl monomer which has an anionic group.

When the monomer component contains an acidic vinyl monomer having an anionic group, strong acid generated from a photoacid generator (described below) promotes departure, the color tone becomes stronger, and the coloring stability is excellent.

As an acidic vinyl monomer which has an anionic group, a carboxyl group-containing vinyl monomer, a sulfo group-containing vinyl monomer, a phosphoric acid group-containing vinyl monomer, etc. are mentioned, for example.

Examples of carboxyl group-containing vinyl monomers include (meth)acrylic acid, 2-carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate carboxypentyl, itaconic acid, maleic acid, Malic acid, crotonic acid, etc.

Moreover, as a carboxyl group containing vinyl monomer, acid anhydride group containing monomers, such as maleic anhydride and itaconic anhydride, are also mentioned, for example.

Examples of the sulfovinyl group-containing monomer include styrenesulfonic acid, allylsulfonic acid, and the like.

As a phosphoric acid group-containing vinyl monomer, 2-hydroxyethyl acryloyl phosphate etc. are mentioned, for example.

As an acidic vinyl monomer which has an anionic group, Preferably, a carboxyl group-containing vinyl monomer is mentioned, More preferably, (meth)acrylic acid is mentioned, Still more preferably, acrylic acid is mentioned.

The acidic vinyl monomers having an anionic group can be used alone or in combination of two or more.

The blending ratio of the acidic vinyl monomer having an anionic group is, for example, 3 parts by mass or more and, for example, 10 parts by mass or less with respect to 100 parts by mass of the alkyl (meth)acrylate, and, with respect to the monomer The component is, for example, 1 mass % or more, and, for example, 8 mass % or less.

Also, the monomer component preferably does not substantially contain a basic vinyl monomer having a lone electron pair that can be copolymerized with an alkyl (meth)acrylate.

Specifically, the compounding ratio of the basic vinyl monomer having a lone electron pair is, for example, 3% by mass or less, preferably 1% by mass or less, and more preferably 0.5% by mass or less, based on the monomer component. More preferably, it is 0 mass % or less. In other words, it is especially preferable that the monomer component does not contain a basic vinyl monomer having a lone electron pair.

If the monomer components do not substantially contain a basic vinyl monomer having a lone electron pair, the dissolution of each monomer component can be suppressed, and the coloring stability can be improved.

As the basic vinyl monomer having a lone pair of electrons, it is a heterocycle-containing basic vinyl monomer having nitrogen in the heterocycle, for example, N-vinylpyrrolidone, methylvinylpyrrolidone, Vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperone, vinylpyrrole, vinylpyrrole, vinylimidazole, vinylpyrazole, vinylpyridine, N-acrylylpyrroline, N-vinylcaprolactam, etc.

In addition, the monomer component optionally includes a functional group-containing vinyl monomer (the above-mentioned acidic vinyl monomer having an anionic group and a basic vinyl monomer having a lone electron pair) capable of copolymerizing with an alkyl (meth)acrylate. body except).

Examples of functional group-containing vinyl monomers include hydroxyl-containing vinyl monomers, cyano-containing vinyl monomers, glycidyl-containing vinyl monomers, aromatic vinyl monomers, vinyl ester monomers, and vinyl ethers. Monomer etc.

Examples of hydroxyl-containing vinyl monomers include: 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, (meth)acrylic acid 6-Hydroxyhexyl, 8-Hydroxyoctyl (meth)acrylate, 10-Hydroxydecyl (meth)acrylate, 12-Hydroxylauryl (meth)acrylate, 4-(Hydroxymethyl)acrylate ) cyclohexyl methyl ester, etc., Preferably, 2-hydroxyethyl (meth)acrylate is mentioned, More preferably, 2-hydroxyethyl acrylate is mentioned.

As a cyano vinyl group containing monomer, (meth)acrylonitrile etc. are mentioned, for example.

As a glycidyl group containing vinyl monomer, glycidyl (meth)acrylate etc. are mentioned, for example.

As an aromatic vinyl monomer, styrene, p-methylstyrene, o-methylstyrene, (alpha)-methylstyrene, etc. are mentioned, for example.

As a vinyl ester monomer, ethyl acetate, vinyl propionate, etc. are mentioned, for example.

As a vinyl ether monomer, methyl vinyl ether etc. are mentioned, for example.

A functional group-containing vinyl monomer can be used individually or in combination of 2 or more types. When preparing a crosslinking agent (described below), preferably a hydroxyl group-containing vinyl monomer is used from the viewpoint of introducing a crosslinked structure into a polymer.

The blending ratio of the functional group-containing vinyl monomer is, for example, 3 parts by mass or more, preferably 5 parts by mass or more, more preferably 15 parts by mass or more, with respect to 100 parts by mass of the alkyl (meth)acrylate. , For example, it is 20 mass parts or less, and, relative to the monomer component, For example, it is 4 mass % or more, Preferably it is 10 mass % or more, Also, for example, it is 30 mass % or less, Preferably it is 20 mass % or less.

In addition, the acrylic polymer is a polymer obtained by polymerizing the above-mentioned monomer components.

When polymerizing the monomer components, for example, formulating an alkyl (meth)acrylate, and optionally an anionic group-containing acidic vinyl monomer and a functional group-containing vinyl monomer to prepare the monomer component, for example, by Acrylic polymers can be prepared by known polymerization methods such as solution polymerization, block polymerization, and emulsion polymerization.

As a polymerization method, preferably, solution polymerization is mentioned.

In solution polymerization, for example, a monomer component and a polymerization initiator are prepared in a known organic solvent to prepare a monomer solution, and then the monomer solution is heated.

As a polymerization initiator, a peroxide-type polymerization initiator, an azo-type polymerization initiator, etc. are mentioned, for example.

Examples of peroxide-based polymerization initiators include peroxycarbonates, ketone peroxides, peroxyketals, hydroperoxides, dialkyl peroxides, diacyl peroxides, peroxyesters, etc. Organic peroxides.

Examples of the azo polymerization initiator include 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 2,2'-azobis( 2,4-dimethylvaleronitrile), 2,2'-dimethyl azobisisobutyrate and other azo compounds.

As a polymerization initiator, an azo-type polymerization initiator is preferable, and 2,2'- azobisisobutyronitrile is more preferable.

A polymerization initiator can be used individually or in combination of 2 or more types.

The compounding ratio of a polymerization initiator is, for example, 0.05 mass part or more, Preferably it is 0.1 mass part or more, For example, it is 1 mass part or less, Preferably it is 0.5 mass part or less with respect to 100 mass parts of monomer components.

The heating temperature is, for example, 50° C. to 80° C., and the heating time is, for example, 1 hour to 8 hours.

Thereby, monomer components are polymerized to obtain an acrylic polymer solution containing an acrylic polymer.

The solid content concentration of the acrylic polymer solution is, for example, 20 mass % or more, and, for example, 80 mass % or less.

The weight average molecular weight of the acrylic polymer is, for example, 100,000 or more, preferably 300,000 or more, more preferably 500,000 or more, and for example, 5,000,000 or less, preferably 3,000,000 or less, more preferably 2,000,000 or less.

In addition, the said weight average molecular weight is the value calculated by polystyrene conversion measured by GPC (gel permeation chromatography).

The glass transition temperature of the adhesive polymer is, for example, 0°C or lower, preferably -20°C or lower, and usually -70°C or higher.

When the glass transition temperature of an adhesive polymer is below the said upper limit, it will be excellent in step followability.

Furthermore, the glass transition temperature is obtained by calculation according to the formula of FOX.

The compound colored by acid is a compound that changes from colorless (transparent) to colored by acid, for example, leuco pigments, such as p,p',p''-tri-dimethylaminotriphenylmethane, etc. Triarylmethane dyes, such as diphenylmethane dyes such as 4,4-bis-dimethylaminophenylbenzhydryl benzyl ether, such as 3-diethylamino-6-methyl-7-chlorofluorescent Fluorescent yellow matrix pigments such as yellow matrix, spiropyran pigments such as 3-methylspirobinaphthopyran, rose bengal pigments such as rose bengal-B-anilinolactam, etc., preferably for example For example, leucochromatic pigments.

The compounds colored by acid may be used alone or in combination of two or more.

The compounding ratio of the compound colored by an acid is 0.5 mass parts or more, for example, 5 mass parts or less, preferably 2 mass parts or less with respect to 100 mass parts of adhesive polymers.

A photoacid generator is a compound that generates acid upon irradiation with active light.

Among such photoacid generators, an onium compound etc. are mentioned as a compound (ultraviolet acid generator) which generate|occur|produces an acid by irradiation of an ultraviolet-ray.

Examples of onium compounds include onium cations such as iodonium and permedium, and Cl ^- , Br ^- , I ^- , ZnCl ₃ ^- , HSO ₃ ^- , BF ₄ ^- , PF ₆ ^- , AsF ₆ ^- , SbF ₆ ^- , CH ₃ SO ₃ ^- , CF ₃ SO ₃ ^- , (C ₆ F ₅ ) ₄ B ^- , (C ₄ H ₉ ) ₄ B ^- and other anion salts, etc.

As such an onium compound, a salt containing caldium (onium cation) and (C ₆ F ₅ ) ₄ B ⁻ (anion) is preferably mentioned.

Moreover, a commercial item can also be used as an ultraviolet acid generator, For example, CPI _- 310B (salt containing calcite and ( _{C6F5 )} 4B-, manufactured by San ^- Apro Corporation) etc. are mentioned.

A photoacid generator can be used individually or in combination of 2 or more types.

The compounding ratio of a photoacid generator is, for example, 1 mass part or more with respect to 100 mass parts of adhesive polymers, For example, it is 20 mass parts or less, Preferably it is 15 mass parts or less.

Also, the first adhesive composition is obtained by mixing an adhesive polymer (a polymer solution in the case of preparing an adhesive polymer by solution polymerization), a compound colored by an acid, and a photoacid generator as described above. Ratio preparation and mixing are prepared (in the case of using a polymer solution as an adhesive polymer, a solution of the first adhesive composition is prepared).

From the viewpoint of introducing a crosslinked structure into the adhesive polymer, it is preferable to mix a crosslinking agent in the first adhesive composition.

Examples of the crosslinking agent include isocyanate crosslinking agents, epoxy crosslinking agents, azoline crosslinking agents, aziridine crosslinking agents, carbodiimide crosslinking agents, metal chelate Compound cross-linking agent, etc.

Examples of isocyanate-based crosslinking agents include aliphatic diisocyanates such as butylene diisocyanate and hexamethylene diisocyanate; esters such as cyclopentyl diisocyanate, cyclohexylene diisocyanate, and isophorone diisocyanate; Cyclic diisocyanates; for example, aromatic diisocyanates such as 2,4-methylene diisocyanate, 4,4'-diphenylmethane diisocyanate, and xylylene diisocyanate.

Moreover, as an isocyanate type crosslinking agent, the derivative|guide_body of the said isocyanate (for example, an isocyanurate modified body, a polyol modified body, etc.) is mentioned.

Commercially available products can also be used as the isocyanate-based crosslinking agent, for example, Coronate L (trimethylolpropane adduct of methylene diisocyanate, manufactured by Tosoh), Coronate HL (hexamethylene diisocyanate Trimethylolpropane adduct, manufactured by Tosoh), Coronate HX (isocyanurate body of hexamethylene diisocyanate, manufactured by Tosoh), Takenate D110N (trimethylolpropane of xylylene diisocyanate adducts, manufactured by Mitsui Chemicals), etc.

As the isocyanate-based crosslinking agent, preferably, a trimethylolpropane adduct of hexamethylene diisocyanate and a trimethylolpropane adduct of xylylene diisocyanate are mentioned.

Examples of the epoxy-based crosslinking agent include diglycidylaniline, 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane, and the like.

As an epoxy-type crosslinking agent, you may use a commercial item, For example, Tetrad C (made by Mitsubishi Gas Chemical) etc. are mentioned.

As an epoxy-type crosslinking agent, Preferably, 1, 3- bis (N, N- diglycidylaminomethyl) cyclohexane is mentioned.

As a crosslinking agent, Preferably, an isocyanate type crosslinking agent and an epoxy type crosslinking agent are mentioned, More preferably, an epoxy type crosslinking agent is mentioned.

A crosslinking agent can be used individually or in combination of 2 or more types.

When a crosslinking agent is blended into the first adhesive composition, functional groups such as hydroxyl groups in the polymer react with the crosslinking agent to introduce a crosslinking structure into the polymer.

The blending ratio of the crosslinking agent is, for example, 0.01 mass parts or more, preferably 0.1 mass parts or more, and for example, 10 mass parts or less, preferably 5 mass parts or less, with respect to 100 mass parts of the adhesive polymer. It is preferably at most 4 parts by mass, more preferably at most 3 parts by mass, and particularly preferably at most 1 part by mass.

Moreover, when compounding a crosslinking agent in the 1st adhesive composition, in order to accelerate a crosslinking reaction, you may prepare a crosslinking catalyst.

Examples of the crosslinking catalyst include metal-based crosslinking catalysts such as tetra-n-butyl titanate, tetraisopropyl titanate, iron acetylacetonate, butyltin oxide, and dioctyltin dilaurate.

A crosslinking catalyst can be used individually or in combination of 2 or more types.

The compounding ratio of a crosslinking catalyst is 0.001 mass part or more with respect to 100 mass parts of adhesive polymers, Preferably it is 0.01 mass part or more, For example, it is 0.05 mass part or less.

Also, the first adhesive composition may contain, for example, a silane coupling agent, an adhesiveness imparting agent, a plasticizer, a softener, an anti-deterioration agent, a filler, a colorant, Various additives such as surfactants, antistatic agents, ultraviolet absorbers, antioxidants, and other additives from the viewpoint of stabilization under fluorescent lamps or natural light.

Thereby, the 1st adhesive composition (the solution of the 1st adhesive composition when using a polymer solution as an adhesive polymer) was obtained.

The shear storage modulus G' at 20°C to 50°C of the first adhesive composition (solid content) is, for example, 1.0×10 ⁴ Pa or more, preferably 2.0×10 ⁴ Pa or more, more preferably 4.0 ×10 ⁴ Pa or more, and, for example, 1.0×10 ⁶ Pa or less, preferably 5.0×10 ⁵ Pa or less.

When the said shear storage modulus G' is in the said range, it is excellent in adhesiveness, and when the shear storage modulus G' is lower, it is also excellent in step followability.

Furthermore, the above-mentioned shear storage modulus G' is measured by dynamic viscoelasticity measurement under the conditions of a frequency of 1 Hz, a heating rate of 5°C/min, and a temperature range of -70°C to 250°C.

And the 1st adhesive layer 2 was formed from the 1st adhesive composition by the following method.

Since the first adhesive layer 2 contains the first adhesive composition, an acid is generated from the photoacid generator by irradiating active light rays (preferably ultraviolet rays), and the compound colored by the acid is colored by the acid, whereby the first 1 Adhesive layer 2 changes from colorless (transparent) to colored. That is, the first adhesive layer 2 is colorless (transparent) before irradiation with active light rays (preferably ultraviolet rays).

Also, colorless (transparent) means that the average transmittance at a wavelength of 400 nm to 700 nm is, for example, 60% or more, preferably 70% or more, more preferably 90% or more, and, for example, 100% or less.

Also, colored means that the average transmittance at a wavelength of 400 nm to 700 nm is, for example, 0% or more, and, for example, less than 60%, preferably 50% or less.

The thickness of the first adhesive layer 2 is, for example, 3 μm or more, preferably 10 μm or more, and, for example, 50 μm or less, preferably 30 μm or less.

1-2. Substrate The base material 3 is disposed on the entire surface of the first adhesive layer 2 , and the base material 3 is the middle layer of the adhesive sheet 1 .

The base material 3 has a film shape extending in the plane direction, and has a flat plane and a flat lower surface.

As described above, the base material 3 and/or the second adhesive layer 4 described below have active ray absorbing properties (preferably ultraviolet absorbing properties).

When the base material 3 has active light absorption, the average transmittance of the active light of the base material 3 is 15% or less, preferably 10% or less, more preferably 9% or less, and more preferably 8% or less, More preferably, it is 7% or less, most preferably, it is 3% or less, and further it is 1% or less.

If the above-mentioned average transmittance is not more than the above-mentioned upper limit, when it is desired to leave the colored portion in the first adhesive layer 2 transparently, or when it is desired to make the amount of coloring less than that of the colored portion, the amount of the colored portion can be suppressed. Colored by ambient light (UV).

On the other hand, when the average transmittance exceeds the above upper limit, coloring by external light (active light rays) other than the colored portion cannot be suppressed.

Furthermore, the method for measuring the average transmittance is described in detail in the following examples.

Moreover, when the base material 3 has actinic ray absorptivity, it is preferable that the base material 3 has ultraviolet absorptivity.

When the base material 3 has ultraviolet absorbing property, as the base material 3, the resin film which mix|blended the ultraviolet absorber, the adhesive tape which mix|blended the ultraviolet absorber, etc. are mentioned, for example. That is, such a base material 3 contains an ultraviolet absorber. When the base material 3 contains an ultraviolet absorber, the average transmittance of the base material 3 at a wavelength of not less than 300 nm and not more than 400 nm can be reliably reduced.

The material constituting the resin film is a material that does not have ultraviolet absorption unless an ultraviolet absorber is blended, and examples include cellulose resins such as cellulose triacetate (TAC), cyclic polyolefin resins such as cycloolefin polymers, and acrylic acid resins. Resins, phenylmaleimide resins, polycarbonate resins, polyester resins, polyamide resins, polystyrene resins, etc., preferably cellulose resins, more preferably cellulose triacetate (TAC).

These materials can be used individually or in combination of 2 or more types.

Examples of the ultraviolet absorber include: benzotriazole-based compounds, hydroxyphenyltrizoline-based compounds, benzophenone-based compounds, salicylate-based compounds, cyanoacrylate-based compounds, nickel zirconium-based compounds Wait.

The ultraviolet absorber may be used alone or in combination of two or more.

A commercial item can also be used as a resin film which mix|blended the ultraviolet absorber, For example, KC2UA (TAC film, the Konica Minolta company make) etc. are mentioned.

Moreover, a commercial item can also be used as the adhesive tape which mix|blended the ultraviolet absorber, For example, CS9934U (made by Nitto Denko Co., Ltd.) etc. are mentioned.

Moreover, as the base material 3, the film formed with the material which has ultraviolet absorbing property even without compounding an ultraviolet absorber, for example, a polyimide film etc. can be mentioned.

As a polyimide film, you may use a commercial item, For example, Kapton 200H (made by TORAY-DUPONT company) etc. are mentioned.

When the base material 3 has ultraviolet absorbing properties, the average transmittance of the base material 3 with a wavelength of 300 nm or more and 400 nm or less is 15% or less, preferably 10% or less, more preferably 9% or less, and even more preferably It is 8% or less, particularly preferably 7% or less, most preferably 3% or less, and furthermore 1% or less.

If the above-mentioned average transmittance is not more than the above-mentioned upper limit, when it is desired to leave the colored portion in the first adhesive layer 2 transparently, or when it is desired to make the amount of coloring less than that of the colored portion, it is possible to suppress the transmission of light from other than the colored portion. Ambient light (ultraviolet) coloration.

When the base material 3 does not have actinic ray absorptivity (preferably ultraviolet absorptivity), as the base material 3, the film etc. which consist of the material which comprises the said resin film are mentioned, for example.

When the substrate 3 does not have active light absorption (preferably ultraviolet absorption), the average transmittance of the active light of the substrate 3 is, for example, more than 50%, and, for example, less than 80%. When the material 3 does not have ultraviolet absorptivity, the average transmittance of the base material 3 at a wavelength of 300 nm to 400 nm is, for example, 50% or more, and, for example, 80% or less.

Also, when the substrate 3 does not have ultraviolet absorption, the average transmittance of the substrate 3 at a wavelength of 400 nm or more and 700 nm or less is, for example, 40% or more, preferably 50% or more, more preferably 70% or more , and more preferably more than 80%, especially more than 85%, most preferably more than 90%.

When the said average transmittance is more than the said minimum, the transparency of the base material 3 is excellent.

Therefore, the adhesive sheet 1 can be preferably used for an optical device and its constituent parts that require transparency.

The thickness of the substrate 3 is such that the above-mentioned average transmittance can be obtained, for example, 10 μm or more, preferably 20 μm or more, and for example, 200 μm or less, preferably 120 μm or less, more preferably 50 μm or less.

The base material 3 may be one layer or multiple layers.

When the base material 3 has multiple layers, multiple layers of the base material 3 of the same type or different types are laminated so that the above-mentioned average transmittance and the above-mentioned thickness are in the above-mentioned range.

Moreover, surface treatment (for example, hard-coat treatment) may be given to the base material 3 as needed.

1-4. Second adhesive layer The second adhesive layer 4 is the lower layer of the adhesive sheet 1 .

The second adhesive layer 4 is a pressure-sensitive adhesive layer.

The second adhesive layer 4 has a film shape extending in the surface direction, and has a flat plane and a flat lower surface.

As mentioned above, the substrate 3 and/or the second adhesive layer 4 have active ray absorbing properties (preferably ultraviolet absorbing properties).

When the 2nd adhesive layer 4 has ultraviolet absorptivity, the 2nd adhesive layer 4 contains a 2nd adhesive composition.

The 2nd adhesive composition contains the said adhesive polymer, the said ultraviolet absorber, the said crosslinking agent, the said crosslinking catalyst, and the said additive as needed. That is, the 2nd adhesive layer 4 containing such a 2nd adhesive composition contains an ultraviolet absorber. When the second adhesive layer 4 contains an ultraviolet absorber, the average transmittance of the second adhesive layer 4 at a wavelength of not less than 300 nm and not more than 400 nm can be reliably reduced.

The second adhesive composition is prepared by mixing an adhesive polymer (a polymer solution in the case of preparing an adhesive polymer by solution polymerization), the above-mentioned ultraviolet absorber, the above-mentioned cross-linking agent if necessary, the above-mentioned cross-linking agent, etc. The catalyst and the above-mentioned additives are formulated and mixed in the above-mentioned ratio.

Moreover, when the 2nd adhesive layer 4 has ultraviolet absorbing property, you may use the adhesive tape which mix|blended the ultraviolet absorber as the 2nd adhesive layer 4.

A commercial item can also be used as an adhesive tape containing a ultraviolet absorber, for example, CS9934U (made by Nitto Denko Co., Ltd.) etc. are mentioned.

On the other hand, when the 2nd adhesive layer 4 does not have ultraviolet absorptivity, the 2nd adhesive layer 4 contains the 3rd adhesive composition.

The third adhesive composition does not contain the above-mentioned ultraviolet absorber, but contains the above-mentioned adhesive polymer, the above-mentioned crosslinking agent, the above-mentioned crosslinking catalyst, and the above-mentioned additives if necessary.

The third adhesive composition is prepared by mixing an adhesive polymer (a polymer solution in the case of preparing an adhesive polymer by solution polymerization), the above-mentioned cross-linking agent, the above-mentioned cross-linking catalyst, and the above-mentioned Additives are formulated and mixed in the above ratios to prepare.

And the 2nd adhesive layer 4 is formed from a 2nd adhesive composition or a 3rd adhesive composition by the following method.

When the second adhesive layer 4 has ultraviolet absorptivity, the average transmittance of the second adhesive layer 4 at a wavelength of 300 nm or more and 400 nm or less is 15% or less, preferably 10% or less, more preferably 9% or less , and more preferably 8% or less, especially preferably 7% or less, most preferably 3% or less, and further 1% or less.

If the above-mentioned average transmittance is not more than the above-mentioned upper limit, when it is desired to leave the colored portion in the first adhesive layer 2 transparently, or when it is desired to make the amount of coloring less than that of the colored portion, it is possible to suppress the transmission of light from other than the colored portion. Ambient light (ultraviolet) coloration.

On the other hand, when the average transmittance exceeds the upper limit, coloring by external light (ultraviolet rays) other than the colored portion cannot be suppressed.

Also, when the second adhesive layer 4 does not have active ray absorption (preferably ultraviolet absorptivity), the average transmittance of the active ray of the substrate 3 is, for example, 50% or more, and, for example, 80% or less, In particular, when the substrate 3 does not have ultraviolet absorptivity, the average transmittance of the substrate 3 at a wavelength of not less than 300 nm and not more than 400 nm is, for example, 50% or more and, for example, 80% or less.

Also, when the second adhesive layer 4 does not have ultraviolet absorptivity, the average transmittance of the second adhesive layer 4 at a wavelength of 400 nm or more and 700 nm or less is, for example, 40% or more, preferably 50% or more, more preferably It is 70% or more, more preferably 80% or more, especially preferably 85% or more, most preferably 90% or more.

The transparency of the 2nd adhesive layer 4 will be excellent as the said average transmittance is more than the said minimum.

Therefore, the adhesive sheet 1 can be preferably used for an optical device and its constituent parts that require transparency.

The thickness of the second adhesive layer 4 is such that the above-mentioned average transmittance can be obtained, and is, for example, 5 μm or more and, for example, 200 μm or less.

The second adhesive layer 4 may be one layer or a plurality of layers.

When the second adhesive layer 4 is a plurality of layers, a plurality of second adhesive layers 4 of the same type or different types are laminated so that the above-mentioned average transmittance and the above-mentioned thickness fall within the above-mentioned range.

1-5. Manufacturing method of adhesive sheet Next, a method of manufacturing the adhesive sheet 1 will be described with reference to FIG. 2 .

The manufacturing method of the adhesive sheet 1 includes the following steps: a first adhesive layer preparation step, which is to prepare the first adhesive layer 2; a substrate arrangement step, which is to arrange the substrate 3 on one side of the first adhesive layer 2; and a second The step of arranging the adhesive layer is to arrange the second adhesive layer 4 on one side of the substrate 3 .

In the step of preparing the first adhesive layer, as shown in FIG. 2A , the first adhesive layer 2 is prepared.

When preparing the 1st adhesive layer 2, the peeling film 5 is prepared first.

Examples of the release film 5 include flexible plastic films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester films.

The thickness of the release film 5 is, for example, 3 μm or more, preferably 10 μm or more, and for example, 200 μm or less, preferably 100 μm or less, more preferably 50 μm or less.

Preferably, the release film 5 is subjected to release treatment using a silicone-based, fluorine-based, long-chain alkyl-based, or aliphatic amide-based release agent, or release treatment using silica powder.

Next, the above-mentioned first adhesive composition (solution of the first adhesive composition) is applied to one surface of the release film 5, and the solvent is dried and removed if necessary.

Examples of coating methods for the first adhesive composition include roll coating, touch roll coating, gravure coating, reverse coating, roll brushing, spray coating, dip roll coating, and bar coating. , Blade coating, air knife coating, curtain coating, die lip coating, die mouth coating, etc.

As drying conditions, the drying temperature is, for example, 50°C or higher, preferably 70°C or higher, more preferably 100°C or higher, and for example, 200°C or lower, preferably 180°C or lower, more preferably 150°C or lower. For example, it is 5 seconds or more, preferably 10 seconds or more, and, for example, 20 minutes or less, preferably 15 minutes or less, more preferably 10 minutes or less.

Thereby, the 1st adhesive layer 2 is arrange|positioned (prepared) on one surface of the peeling film 5.

Furthermore, when the first adhesive composition contains a crosslinking agent, it is preferable to dry and remove it simultaneously or after the solvent is dried (if necessary, after the peeling film 5 is layered on one surface of the first adhesive layer 2). Crosslinking occurs by aging.

Aging conditions are appropriately set according to the type of cross-linking agent. The aging temperature is, for example, 20°C or higher, for example, 160°C or lower, preferably 50°C or lower, and the aging time is 1 minute or more, preferably 12 hours or more , more preferably 1 day or more, and, for example, 7 days or less.

In the base material disposing step, as shown in FIG. 2B , the base material 3 is disposed on one side of the first adhesive layer 2 .

In the step of disposing the second adhesive layer, as shown in FIG. 2C , the second adhesive layer 4 is disposed on one side of the substrate 3 .

In this way, an adhesive sheet 1 is obtained, which includes a release film 5, a first adhesive layer 2 disposed on one side of the release film 5, a substrate 3 disposed on one side of the first adhesive layer 2, and a substrate 3 disposed on one side The second adhesive layer 4.

Furthermore, the peeling film 5 arrange|positioned on the other surface of the 1st adhesive layer 2 can also be peeled off as needed.

In this case, the adhesive sheet 1 is provided with the 1st adhesive layer 2, the base material 3 arrange|positioned on the surface of the 1st adhesive layer 2, and the 2nd adhesive layer 4 arrange|positioned in the surface of the base material 3.

Moreover, you may arrange|position the peeling film 5 (refer FIG. 2C dotted line) on one surface of the 2nd adhesive layer 4 as needed.

In this case, the adhesive sheet 1 includes a release film 5, a first adhesive layer 2 disposed on one side of the release film 5, a base material 3 disposed on one side of the first adhesive layer 2, and a base material 3 disposed on one side of the base material 3. The second adhesive layer 4, and the release film 5 arranged on one side of the second adhesive layer.

In addition, in the above description, the first adhesive layer 2 is disposed on one side of the release film 5, but the first adhesive layer 2 may also be disposed on one side of the transparent substrate from the viewpoint of workability.

The transparent substrate has a film shape extending in the plane direction, and has a flat plane and a flat lower surface.

The transparent substrate includes flexible plastic material.

Examples of such plastic materials include polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate; for example, polymethacrylate, etc. (Meth)acrylic resins (acrylic resins and/or methacrylic resins); polyolefin resins such as polyethylene, polypropylene, cycloolefin polymer (COP); such as polycarbonate resins; such as polyether resins Resins; such as polyarylate resins; such as melamine resins; such as polyamide resins; such as polyimide resins; such as cellulose resins; such as polystyrene resins;

When the first adhesive layer 2 is colored by irradiating light from the transparent base material side, it is preferable that the base material 5 has transparency to light. Specifically, the total light transmittance (JIS K 7375-2008) of the transparent substrate is, for example, 80% or more, preferably 85% or more.

From the viewpoint of both transparency to light and mechanical strength, polyester resin is preferably used as the plastic material, and polyethylene terephthalate (PET) is more preferably used.

The thickness of the transparent substrate is, for example, 4 μm or more, preferably 20 μm or more, more preferably 30 μm or more, further preferably 45 μm or more, and, for example, 500 μm or less, from the viewpoint of flexibility and operability In terms of thickness, it is preferably 300 μm or less, more preferably 200 μm or less, and still more preferably 100 μm or less.

When disposing the first adhesive layer 2 on one side of the transparent substrate, apply the above-mentioned first adhesive composition (solution of the first adhesive composition) on one side of the transparent substrate in the same manner as above, and if necessary, apply The solvent is removed by drying.

In addition, the adhesive sheet 1 may be irradiated with active light rays (preferably ultraviolet rays) to the first adhesive layer 2 when the intermediate laminate 6 described below is produced or before the intermediate laminate 6 described below is produced.

When the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) at the time of manufacturing the intermediate laminate 6, specifically, the second adhesive layer is disposed and then irradiated with active light rays (preferably ultraviolet rays).

Specifically, active light rays (preferably ultraviolet rays) are irradiated in the irradiation step in the manufacturing method of the intermediate laminate 6 described below.

Also, when irradiating the first adhesive layer 2 with active light rays (preferably ultraviolet rays) before manufacturing the intermediate laminate 6 described below, specifically, after the step of preparing the first adhesive layer and before the step of arranging the substrate Active light (preferably ultraviolet light).

Referring to FIG. 3 , the case of irradiating active light rays (preferably ultraviolet rays) after the adhesive layer preparation step and before the base material placement step will be described.

In the adhesive layer preparation step, as shown in FIG. 3A , the first adhesive layer 2 is prepared on one side of the release film 5 in the same manner as the method described above.

Next, after the adhesive layer preparation step, as shown in FIG. 3B , the entire first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the release film 5 .

Next, in the substrate arrangement step, as shown in FIG. 3C , the substrate 3 is arranged on one side of the first adhesive layer 2 .

Next, as shown in FIG. 3D , in the step of arranging the second adhesive layer, the second adhesive layer 4 is arranged on one side of the substrate 3 .

According to this method, the entire first adhesive layer 2 can be discolored in advance, and further coloring of the colored portion by external light (active light) can be suppressed.

In addition, in the above description, the base material 3 is disposed on one side of the first adhesive layer 2 in the base material disposing step, and the second adhesive layer 4 is disposed on one side of the base material 3 in the second adhesive layer disposing step. Also as shown in FIG. 3E , the release film 5 on the other side of the first adhesive layer 2 (transparent base material when the first adhesive layer 2 is prepared on one side of the transparent base material) can be replaced and attached as the base material 3 And the second adhesive layer 4.

Specifically, the release film 5 on the other side of the first adhesive layer 2 (transparent base material when the first adhesive layer 2 is prepared on one side of the transparent base material) is peeled off, and the other side of the first adhesive layer 2 The substrate 3 is arranged, and the second adhesive layer 4 is arranged on the other side of the substrate 3 .

In addition, in the above description, the entire first adhesive layer 2 is discolored, but a part of the first adhesive layer 2 may be discolored.

In this case, as shown in FIG. 4A , on the other side of the part 51 that will be irradiated with active light (preferably ultraviolet rays) (in detail, it is arranged on the other side of the part 51 that will be irradiated with active light (preferably ultraviolet rays) The other side of the peeling film 5) is not configured to block the mask 7 of active light (preferably ultraviolet rays), and is not irradiated with active light (preferably ultraviolet). The other side of the release film 5) on the other side of the part 52 that is preferably ultraviolet rays) is configured to block the mask 7 that blocks active light (preferably ultraviolet rays), and irradiates active light rays (preferably ultraviolet rays) from the surface side of the release film 5. ).

And, in the base material disposing step, as shown in FIG. 4B , the base material 3 is disposed on one side of the first adhesive layer 2 .

Next, in the step of disposing the second adhesive layer, as shown in FIG. 4C , the second adhesive layer 4 is disposed on one surface of the substrate 3 .

Thereby, part of the first adhesive layer 2 can be discolored in advance, and coloring by external light (active light) can be suppressed in addition to the colored part.

Also, in this case, the peeling film 5 on the other side of the first adhesive layer 2 (transparent base material when the first adhesive layer 2 is prepared on one side of the transparent base material) can also be replaced and attached as a base. Material 3 and the second adhesive layer 4.

Specifically, as shown in FIG. 4D, all of the peeling film 5 can be replaced and attached as the base material 3 and the second adhesive layer 4. Also, as shown in FIG. The release film 5 on the other side of the portion 52 (preferably ultraviolet rays) (transparent substrate when the first adhesive layer 2 is prepared on one side of the transparent substrate) is replaced and attached as the substrate 3 and the second adhesive layer 4 .

In addition, in the above description, the adhesive sheet 1 includes the first adhesive layer 2, the base material 3, and the second adhesive layer 4, but an intermediate layer such as the above-mentioned transparent base material may be interposed between the first adhesive layer 2 and the base material. Between the materials 3 and/or between the base material 3 and the second adhesive layer 4.

2. Intermediate laminate As shown in FIG. 5 , the intermediate laminate 6 has a film shape (including a sheet shape) with a specific thickness, extends in a direction (plane direction) perpendicular to the thickness direction, and has a flat upper surface and a flat lower surface. .

Specifically, the intermediate laminate 6 includes an adhesive sheet 1 including a first adhesive layer 2, a substrate 3 disposed on one side of the first adhesive layer 2, and a second adhesive sheet disposed on one side of the substrate 3. layer 4; and an adherend 15, which is disposed on the other side of the adhesive sheet 1 (the other side of the first adhesive layer 2).

Also, when the release film 5 is disposed on one side of the adhesive sheet 1 (the side of the second adhesive layer 4) in the intermediate laminate 6, the intermediate laminate 6 includes the adhesive sheet 1 having the first adhesive layer 2. The substrate 3 arranged on one side of the first adhesive layer 2, the second adhesive layer 4 arranged on one side of the substrate 3, and the release film 5 arranged on one side of the second adhesive layer 4 (refer to the dotted line in FIG. 5 ) and an adherend 15 configured on the other side of the adhesive sheet 1 (the other side of the first adhesive layer 2).

Details will be described below, but the intermediate laminate 6 is obtained by attaching the above-mentioned adhesive sheet 1 to the adherend 15 .

Since the intermediate laminate 6 includes the base material 3 and the second adhesive layer 4, it is possible to suppress coloration of the non-irradiated/low-irradiated portion 21 (described below) in the first adhesive layer 2 by external light (active light).

2-1. Adhesive sheet As described above, the adhesive sheet 1 includes the release film 5, the first adhesive layer 2 disposed on one side of the release film 5, the base material 3 disposed on one side of the first adhesive layer 2, and the base material 3 disposed on one side of the base material 3. 2nd adhesive layer 4 .

Moreover, as mentioned above, the adhesive sheet 1 may laminate|stack the peeling film 5 on one side of the 2nd adhesive layer 4 as needed.

In this case, the adhesive sheet 1 includes a release film 5, a first adhesive layer 2 disposed on one side of the release film 5, a base material 3 disposed on one side of the first adhesive layer 2, and a base material 3 disposed on one side of the base material 3. The second adhesive layer 4, and the release film 5 arranged on one side of the second adhesive layer.

In the following description, the case of using the adhesive sheet 1 provided with the release film 5 on one side of the second adhesive layer 4 will be described in detail.

In addition, the first adhesive layer 2 in the adhesive sheet 1 has a high light transmittance portion 10 with a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion with a relatively small visible light transmittance at a wavelength of 550 nm. 11.

Furthermore, the details will be described below, and the visible light transmittance at a wavelength of 550 nm of the high light transmittance portion 10 and the low light transmittance portion 11 is determined by the manufacturing method of the intermediate laminate 6 described below.

2-2. Adhered body The to-be-adhered body 15 is a to-be-reinforced body reinforced with the adhesive sheet 1, For example, an optical device, an electronic device, its component parts, etc. are mentioned.

In addition, in FIG. 4, the adherend 15 has a flat plate shape, but the shape of the adherend 15 is not particularly limited, and various shapes are selected according to the types of optical devices, electronic devices and their structural parts.

Further, the details will be described below. In the method of manufacturing the intermediate laminate 6, when the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the adherend 15 (described below) Embodiment 2A), the manufacturing method of the intermediate laminate 6 is determined according to whether the adherend 15 transmits the active light (preferably ultraviolet) or blocks the active light (preferably ultraviolet).

As the adherend 15 (hereinafter referred to as the first adherend 30 ) that transmits active light rays among such adherends 15 , the first adherend 30 that transmits ultraviolet rays is preferably mentioned.

As the 1st to-be-adhered body 30 which transmits an ultraviolet-ray, an alkali-free glass, a PET film, etc. are mentioned, for example.

The average transmittance of the active light rays of the first adherend 30 that transmits the active light rays is, for example, 60% or more, preferably 65% or more. In the case of the first adherend 30 , the average transmittance of the first adherend 30 that transmits ultraviolet rays at a wavelength of not less than 300 nm and not more than 400 nm is, for example, 60% or more, preferably 65% or more.

When the average transmittance is equal to or greater than the above lower limit, active light rays (preferably ultraviolet rays) can pass through the first adherend 30 , and the adhesive layer 2 can be irradiated with active light rays (preferably ultraviolet rays).

In addition, as the adherend 15 (hereinafter referred to as the second adherend 31 ) that blocks active light rays (preferably ultraviolet rays) among such adherends 15, a second adherend that absorbs active light rays can be cited. 31. The second adherend 31 that reflects active light (does not transmit active light).

As the 2nd to-be-adhered body 31 which absorbs an active ray, Preferably, the 2nd to-be-adhered body 31 which absorbs an ultraviolet-ray is mentioned.

As the 2nd to-be-adhered body 31 which absorbs an ultraviolet-ray, the glass plate etc. which coated the polyimide film, the said ultraviolet absorber, etc. are mentioned, for example.

The average transmittance of active light of the second adherend 31 that absorbs active light is, for example, 15% or less, preferably less than 10%. In particular, the second adherend 31 that absorbs active light is the second adherend that absorbs ultraviolet rays. In the case of the adherend 31, the average transmittance of the second adherend 31 that absorbs ultraviolet rays at a wavelength of 300 nm to 400 nm is, for example, 15% or less, preferably 10% or less.

When the said average transmittance is more than the said minimum, the 2nd to-be-adhered body 31 can absorb actinic light (preferably ultraviolet-ray).

As the 2nd to-be-adhered body 31 which reflects an active ray, Preferably, the 2nd to-be-adhered body 31 which reflects ultraviolet-ray is mentioned.

As the 2nd to-be-adhered body 31 which reflects an ultraviolet-ray, metal substrates, such as a copper plate, etc. are mentioned, for example.

2-3. Manufacturing method of intermediate laminate The manufacturing method of the intermediate laminate 6 includes the following steps: a preparation step, which is to prepare the above-mentioned adhesive sheet 1; an irradiation step, which is to irradiate the first adhesive layer 2 with active light (preferably ultraviolet rays) Form the high-irradiation portion 20 where the irradiation amount of active light (preferably ultraviolet rays) is relatively high, and the irradiation amount of active light rays (preferably ultraviolet rays) is relatively low, or the portion that is not irradiated with active light rays (preferably ultraviolet rays) The non-irradiated/low-irradiated portion 21, whereby the visible light transmittance of the high-irradiated portion 20 at a wavelength of 550 nm is smaller than the visible light transmittance of the non-irradiated/low-irradiated portion 21 at a wavelength of 550 nm; and a bonding step, which is to The other side of the adhesive sheet 1 is attached to the adherend 15 .

That is, since the adhesive sheet 1 is used in the manufacturing method of the intermediate laminate 6, the intermediate laminate 6 obtained by the manufacturing method of the intermediate laminate 6 can suppress the coloring of parts other than the non-irradiated/low-irradiated portion 21. Colored by ambient light (reactive rays).

Hereinafter, the manufacturing method of the intermediate laminate 6 will be described respectively according to the order of each step and the irradiation direction of active light (preferably ultraviolet rays).

Specifically, as the order of each step, the irradiation step is carried out after the preparation step, and the bonding step is carried out after the irradiation step (hereinafter referred to as the first embodiment), or the bonding step is carried out after the preparation step, and in After the bonding step, the irradiation step is implemented (hereinafter referred to as the second embodiment).

In addition, as the irradiation direction of active light (preferably ultraviolet rays), in the first embodiment, the first adhesive layer 2 is irradiated from the surface side of the release film 5 on the other side (the surface side of the first adhesive layer 2). Active light rays (preferably ultraviolet rays) (hereinafter referred to as Embodiment 1A), or, irradiate active light rays ( Preferably ultraviolet rays) (hereinafter referred to as Embodiment 1B). Also, in the second embodiment, the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the adherend 15 (hereinafter referred to as the second A embodiment), or the release film from one side The surface side of 5 (the surface side of the second adhesive layer 4) irradiates the first adhesive layer 2 with active light rays (preferably ultraviolet rays) (hereinafter referred to as the second embodiment B).

Each embodiment will be described in detail below.

Furthermore, in the manufacturing method of the intermediate laminate 6, the non-irradiated/low-irradiated portion 21 is determined to be the non-irradiated portion 22 or the low-irradiated portion 23 according to the irradiation amount of active light rays (preferably ultraviolet rays), but in the following In the description, the case where the non-irradiated/low-irradiated portion 21 is the non-irradiated portion 22 will be described in detail.

In addition, the unirradiated portion 22 is a portion not irradiated with active light (preferably ultraviolet rays), and the visible light transmittance of the unirradiated portion 22 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

The non-irradiated part 22 will have transparency if the said visible light transmittance is more than the said minimum.

2-3-1. Embodiment 1A In Embodiment 1A, the irradiation step is implemented after the preparation step, and the bonding step is implemented after the irradiation step.

In addition, in the 1A embodiment, in the irradiation step, the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the first adhesive layer 2 .

Embodiment 1A will be described with reference to FIG. 6 .

In the preparation step, as shown in FIG. 6A , an adhesive sheet 1 is prepared.

In the irradiation step, as shown in FIG. 6B , the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) to form active light rays (preferably ultraviolet rays) in the first adhesive layer 2. The irradiation amount is relatively high. The irradiated part 20 and the non-irradiated part 22 not irradiated with active light (preferably ultraviolet rays).

Furthermore, in the following description, the case of irradiating a part of the adhesive sheet 1 (first adhesive layer 2) with active light rays (preferably ultraviolet rays) will be described. The upper part is divided into 3 parts, two ends of which are irradiated with active light rays (preferably ultraviolet rays), and a part of the adhesive sheet 1 (first adhesive layer 2) irradiated with active light rays (preferably ultraviolet rays) is set It is the highly irradiated part 20 (in other words, the adhesive sheet 1 is divided into three parts in the plane direction, and only one of the central parts is the non-irradiated part 22).

Specifically, in the irradiation step, in the adhesive sheet 1, for the highly irradiated portion 20, active light (preferably ultraviolet rays), for the unirradiated portion 22, no active light rays (preferably ultraviolet rays) are irradiated.

In detail, the mask 7 for blocking active light (preferably ultraviolet rays) is not arranged in the highly irradiated part 20 (specifically, the other side of the release film 5 disposed on the other side of the high irradiated part 20). The irradiated part 22 (in detail, the other side of the release film 5 disposed on the other side of the non-irradiated part 22) is equipped with a shield 7 that blocks active light (preferably ultraviolet rays), and from the release film 5 on the other side The surface side (the surface side of the first adhesive layer 2 ) is irradiated with active light rays (preferably ultraviolet rays).

Thereby, active light rays (preferably ultraviolet rays) are irradiated only to the highly irradiated portion 20 .

And, in the first adhesive layer 2 in the highly irradiated portion 20, acid is generated from the photoacid generator, and the compound colored by the acid is colored (specifically, black) by the acid. As a result, the first adhesive layer 2 in the highly irradiated portion 20 changes from colorless (transparent) to colored (visible light transmittance at a wavelength of 550 nm decreases). Thus, the visible light transmittance of the highly irradiated portion 20 at a wavelength of 550 nm is smaller than that of the non-irradiated portion 22 at a wavelength of 550 nm (specifically, the highly irradiated portion 20 is darker than the non-irradiated portion 22 ).

That is, highly irradiated portions 20 having relatively low visible light transmittance at a wavelength of 550 nm and non-irradiated portions 22 having relatively high visible light transmittance at a wavelength of 550 nm are formed.

In this way, the high irradiated portion 20 becomes the low light transmittance portion 11 , and the non-irradiated portion 22 becomes the high light transmittance portion 10 .

In the pasting step, as shown in FIG. 6C , the other side of the adhesive sheet 1 (the other side of the first adhesive layer 2 ) is pasted on the adherend 15 .

Specifically, the release film 5 is peeled from the other surface of the adhesive sheet 1, and the adherend 15 is placed on the other surface of the adhesive sheet 1 (the other surface of the first adhesive layer 2).

Thus, an intermediate laminate 6 is obtained, which includes an adherend 15, a first adhesive layer 2 disposed on one side of the adherend 15, a base material 3 disposed on one side of the first adhesive layer 2, and a substrate disposed on the base material 3. The second adhesive layer 4 on one side, and the release film 5 disposed on one side of the second adhesive layer.

In addition, in the intermediate laminate 6, the first adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 10 having a relatively small visible light transmittance at a wavelength of 550 nm. Part 11.

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to Embodiment 1A, the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exhibited, and since the irradiation step is performed after the preparation step, and the bonding step is performed after the irradiation step, the transmittance formed in the irradiation step is different. The patterned shape of the region is easily maintained even when exposed to ambient light.

Furthermore, according to Embodiment 1A, since the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the release film 5 on the other side (the surface side of the first adhesive layer 2) in the irradiation step, Therefore, the first adhesive layer 2 can be surely colored.

Moreover, especially if the adherend 15 is the second adherend 31 , it is possible to suppress coloring of the non-irradiated portion 22 by external light (active light) from the surface side of the second adherend 31 .

2-3-2. Embodiment 1B In Embodiment 1B, the irradiation process is implemented after the preparation process, and the bonding process is implemented after the irradiation process.

Also, in the 1B embodiment, in the irradiation step, the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the second adhesive layer 4 .

Specifically, in the step of irradiating, the second adhesive layer 4 is irradiated with active light rays (preferably ultraviolet rays) in an amount exceeding the absorption amount of the substrate 3 and the second adhesive layer 4 from the surface side of the second adhesive layer 4 . ) to discolor the first adhesive layer 2 .

Embodiment 1B will be described with reference to FIG. 7 .

In the preparation step, as shown in FIG. 7A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the irradiation step, as shown in FIG. 7B , the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) to form active light rays (preferably ultraviolet rays) in the first adhesive layer 2. The irradiation amount is relatively high. The irradiated part 20 and the non-irradiated part 22 not irradiated with active light (preferably ultraviolet rays).

Specifically, in the irradiation step, in the adhesive sheet 1, for the highly irradiated portion 20, active light rays (preferably ultraviolet rays) are irradiated from the surface side of the release film 5 on one side (the surface side of the second adhesive layer 4). ) (active light rays (preferably ultraviolet rays) exceeding the amount of light absorbed by the base material 3 and the second adhesive layer 4), the unirradiated portion 22 is not irradiated with active light rays (preferably ultraviolet rays).

In detail, the mask 7 for blocking active light (preferably ultraviolet rays) is not arranged in the high irradiation part 20 (specifically, one side of the release film 5 disposed on one side of the high irradiation part 20), and Part 22 (in detail, one side of the release film 5 disposed on one side of the unirradiated portion 22) is equipped with a mask 7 that blocks active light (preferably ultraviolet rays), and from the surface side of the release film 5 on one side ( The surface side of the second adhesive layer 4 ) is irradiated with active light rays (preferably ultraviolet rays) (active light rays (preferably ultraviolet rays) with an amount of light exceeding the absorption amount of the substrate 3 and the second adhesive layer 4 ).

Thereby, only the highly irradiated portion 20 is irradiated with active light rays (preferably ultraviolet rays), and the highly irradiated portion 20 (low light transmittance portion 11) and the non-irradiated portion 22 (high light transmittance portion 11) can be formed similarly to the above-mentioned first A embodiment. part 10).

In the attaching step, as shown in FIG. 7C , the other side of the adhesive sheet 1 (the other side of the first adhesive layer 2 ) is attached to the adherend 15 in the same manner as in the above-mentioned 1A embodiment.

Thus, an intermediate laminate 6 is obtained, which includes an adherend 15, a first adhesive layer 2 disposed on one side of the adherend 15, a base material 3 disposed on one side of the first adhesive layer 2, and a substrate disposed on the base material 3. The second adhesive layer 4 on one side, and the release film 5 disposed on one side of the second adhesive layer.

In addition, in the intermediate laminate 6, the first adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 10 having a relatively small visible light transmittance at a wavelength of 550 nm. Part 11.

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to Embodiment 1B, the effect of the manufacturing method of the above-mentioned intermediate laminate 6 is brought into play, and since the irradiation step is performed after the preparation step, and the lamination step is performed after the irradiation step, the bonding step is performed after the irradiation step (adhesive layer 2 and active layer 2). In the event of a failure in bonding of the light absorbing layer 3 ), the next step (irradiation step) can be stopped in advance, and as a result, the efficiency is improved.

Moreover, according to Embodiment 1B, since the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of one release film 5 (the surface side of the second adhesive layer 4) in the irradiation step, It is necessary to irradiate the base material 3 and/or the second adhesive layer 4 with a large amount of active light (preferably ultraviolet rays), so that it is easy to control the transmittance of the highly irradiated portion 20 .

Moreover, especially if the adherend 15 is the second adherend 31 , it is possible to suppress coloring of the non-irradiated portion 22 by external light (active light) from the surface side of the second adherend 31 .

2-3-3. Embodiment 2A In Embodiment 2A, the bonding step is implemented after the preparation step, and the irradiation step is implemented after the bonding step.

Also, in the 2A embodiment, in the irradiation step, the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the adherend 15 .

In the 2A embodiment, according to the adherend 15, the active light (preferably ultraviolet) is transmitted or the active light (preferably ultraviolet) is blocked (specifically, the adherend 15 is the first adherend 30 Or the second adherend 31) determines the manufacturing method of the intermediate laminate 6.

Hereinafter, the case where the adherend 15 is the first adherend 30 and the case where the adherend 15 is the second adherend 31 will be described.

Embodiment 2A in the case where the adherend 15 is the first adherend 30 will be described with reference to FIG. 8 .

In the preparation step, as shown in FIG. 8A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the attaching step, as shown in FIG. 8B , the other side of the adhesive sheet 1 (the other side of the first adhesive layer 2 ) is attached to the first adherend 30 in the same manner as in the above-mentioned 1A embodiment.

In the irradiation step, as shown in FIG. 8C, the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) to form active light rays (preferably ultraviolet rays) in the first adhesive layer 2. The irradiation amount is relatively high. The irradiated part 20 and the non-irradiated part 22 not irradiated with active light (preferably ultraviolet rays).

Specifically, in the irradiation step, in the adhesive sheet 1, the highly irradiated portion 20 is irradiated with active light (preferably ultraviolet rays) from the first adherend 30 side, and the non-irradiated portion 22 is not irradiated with active light. (preferably ultraviolet light).

Specifically, after a mask 7 for blocking active light (preferably ultraviolet) is disposed on a part of the other surface of the first adherend 30, the first adhesive layer 2 is irradiated with active light (preferably ultraviolet).

In more detail, no mask for blocking active light (preferably ultraviolet rays) is placed on the highly irradiated portion 20 (specifically, the other side of the first adherend 30 arranged on the other side of the highly irradiated portion 20) 7. Arrange a mask 7 for blocking active light (preferably ultraviolet rays) on the unirradiated part 22 (in detail, the other side of the first adherend 30 arranged on the other side of the unirradiated part 22), from the first 1. The surface side of the adherend 30 is irradiated with active light rays (preferably ultraviolet rays).

At this time, since the first adherend 30 transmits active light rays (preferably ultraviolet rays), only the highly irradiated portion 20 can be irradiated with active light rays (preferably ultraviolet rays).

Thereby, the highly irradiated part 20 (low light transmittance part 11) and the non-irradiated part 22 (high light transmittance part 10) can be formed similarly to the said 1A embodiment.

Through the above, as shown in FIG. 8D , an intermediate laminate 6 is obtained, which includes an adherend 15 (first adherend 30 ), and a first adherend disposed on one side of the adherend 15 (first adherend 30 ). Adhesive layer 2, substrate 3 arranged on one side of the first adhesive layer 2, second adhesive layer 4 arranged on one side of the substrate 3, and release film 5 arranged on one side of the second adhesive layer.

In addition, in the intermediate laminate 6, the first adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 10 having a relatively small visible light transmittance at a wavelength of 550 nm. Part 11.

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to Embodiment 2A (the case where the adherend 15 is the first adherend 30), the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exerted, and since the bonding step is performed after the preparation step, and after the bonding step Since the irradiation step is performed, foreign matter or air bubbles can be confirmed during the bonding step.

Also, according to Embodiment 2A (when the adherend 15 is the first adherend 30), since the first adhesive layer 2 is exposed to the surface side of the adherend 15 (first adherend 30) in the irradiation step, By irradiating active light rays (preferably ultraviolet rays), the alignment accuracy of the part to be colored is improved.

Also, according to Embodiment 2A (when the adherend 15 is the first adherend 30), since the first adherend 15 is used, it is possible to Active light rays (preferably ultraviolet rays) are surely irradiated to the first adhesive layer 2 .

Next, Embodiment 2B in the case where the adherend 15 is the second adherend 31 will be described with reference to FIG. 9 .

In the preparation step, as shown in FIG. 9A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the bonding step, as shown in FIG. 9B , the second adherend 31 is arranged on a part of the other side of the adhesive sheet 1 (a part of the other side of the first adhesive layer 2 ).

Specifically, the release film 5 is peeled off from the adhesive sheet 1, and the second adherend 31 is placed on a part of the other side of the adhesive sheet 1 (a part of the other side of the first adhesive layer 2).

Furthermore, in the following description, the following case will be described, that is, as shown in FIG. 9B , the adhesive sheet 1 is divided into three parts in the surface direction, and the second adhesive sheet is arranged at one of the central parts. Body 31.

In the irradiation step, as shown in FIG. 9C , the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) to form active light rays (preferably ultraviolet rays) in the first adhesive layer 2. The irradiation amount is relatively high. The irradiated part 20 and the non-irradiated part 22 not irradiated with active light (preferably ultraviolet rays).

Specifically, in the irradiation step, in the adhesive sheet 1, the highly irradiated portion 20 is irradiated with active light (preferably ultraviolet rays) from the surface side of the second adherend 31, and the non-irradiated portion 22 is not irradiated. Active light (preferably ultraviolet light).

Specifically, unlike the above-mentioned 1A embodiment, 1B embodiment, and 2A embodiment (in the case where the adherend 15 is the first adherend 30), a device for blocking active light rays (preferably ultraviolet rays) is not used. The mask 7 is used to directly irradiate active light rays (preferably ultraviolet rays) from the surface side of the second adherend 31 .

At this time, since the second adherend 31 blocks the active light rays (preferably ultraviolet rays), the second adherend 31 can replace the shield 7 that blocks the active light rays (preferably ultraviolet rays), preventing the disposition of The non-irradiated part 22 of the second adherend 31 is irradiated with active light (preferably ultraviolet rays). ).

Thereby, the highly irradiated part 20 (low light transmittance part 11) and the non-irradiated part 22 (high light transmittance part 10) can be formed similarly to the said 1A embodiment.

Through the above, as shown in FIG. 9D , an intermediate laminate 6 is obtained, which includes an adherend 15 (second adherend 31 ), and a first adherend disposed on one side of the adherend 15 (second adherend 31 ). Adhesive layer 2, substrate 3 arranged on one side of the first adhesive layer 2, second adhesive layer 4 arranged on one side of the substrate 3, and release film 5 arranged on one side of the second adhesive layer.

In addition, in the intermediate laminate 6, the first adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 10 having a relatively small visible light transmittance at a wavelength of 550 nm. Part 11.

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to Embodiment 2A (the case where the adherend 15 is the second adherend 31), the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exhibited, and since the bonding step is performed after the preparation step, and after the bonding step Since the irradiation step is performed, foreign matter or air bubbles can be confirmed during the bonding step.

Also, according to Embodiment 2A (when the adherend 15 is the second adherend 31), since the first adhesive layer 2 is exposed to the surface side of the adherend 15 (second adherend 31) in the irradiation step, By irradiating active light rays (preferably ultraviolet rays), the alignment accuracy of the part to be colored is improved.

Also, according to Embodiment 2A (the case where the adherend 15 is the second adherend 31), the portion where the second adherend 15 is arranged (the non-irradiated portion 22) can be reliably prevented from being irradiated with active light (compared to the second adherend 31). preferably UV light).

2-3-4. Embodiment 2B In Embodiment 2B, the bonding step is implemented after the preparation step, and the irradiation step is implemented after the bonding step.

In addition, in the 2B embodiment, in the irradiation step, the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the second adhesive layer 4 .

Specifically, similarly to Embodiment 1B, by irradiating the first adhesive layer 2 from the surface side of the release film 5 (the surface side of the second adhesive layer 4 ) in the irradiation step beyond the base material 3 and the second adhesive layer, 2 The active light rays (preferably ultraviolet rays) of the amount of light absorbed by the adhesive layer 4 cause the first adhesive layer 2 to change color.

Embodiment 2B will be described with reference to FIG. 10 .

In the preparation step, as shown in FIG. 10A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the sticking step, as shown in FIG. 10B , the other side of the adhesive sheet 1 (the other side of the first adhesive layer 2 ) is stuck to the adherend 15 in the same manner as in the above-mentioned 1A embodiment.

In the irradiation step, as shown in FIG. 10C , the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) to form active light rays (preferably ultraviolet rays) in the first adhesive layer 2. The irradiation amount is relatively high. The irradiated part 20 and the non-irradiated part 22 not irradiated with active light (preferably ultraviolet rays).

Specifically, in the irradiation step, in the adhesive sheet 1, for the highly irradiated portion 20, active light rays (preferably ultraviolet rays) are irradiated from the surface side of the release film 5 on one side (the surface side of the second adhesive layer 4). ) (active light rays (preferably ultraviolet rays) exceeding the amount of light absorbed by the base material 3 and the second adhesive layer 4), the unirradiated portion 22 is not irradiated with active light rays (preferably ultraviolet rays).

In detail, the mask 7 for blocking active light (preferably ultraviolet rays) is not arranged in the high irradiation part 20 (specifically, one side of the release film 5 disposed on one side of the high irradiation part 20), and Part 22 (in detail, one side of the release film 5 arranged on one side of the unirradiated part 22) is equipped with a mask 7 that blocks active light (preferably ultraviolet rays), and from the surface side of the release film 5 on one side ( The surface side of the second adhesive layer 4) is irradiated with active light rays (preferably ultraviolet rays).

Thereby, only active light rays (preferably ultraviolet rays) can be irradiated to the highly irradiated portion 20, and the highly irradiated portion 20 (low light transmittance portion 11) and the non-irradiated portion 22 (high light transmittance portion 11) can be formed in the same manner as in the above-mentioned 1A embodiment. Transmittance section 10).

Through the above, as shown in FIG. 10D , an intermediate laminate 6 including an adherend 15 , the first adhesive layer 2 arranged on one side of the adherend 15 , and a base material arranged on one side of the first adhesive layer 2 is obtained. 3. The second adhesive layer 4 arranged on one side of the substrate 3, and the release film 5 arranged on one side of the second adhesive layer.

In addition, in the intermediate laminate 6, the first adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 10 having a relatively small visible light transmittance at a wavelength of 550 nm. Part 11.

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 80% or more, preferably 90% or more.

If the visible light transmittance of the low light transmittance portion 11 does not reach the above upper limit, the low light transmittance portion 11 can be reliably given the function of absorbing light.

Moreover, if the said visible light transmittance of the high light transmittance part 10 is more than the said minimum, the high light transmittance part 10 will have transparency.

According to the 2B embodiment, the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exerted, and since the bonding step is performed after the preparation step, and the irradiation step is carried out after the bonding step, foreign matter or air bubbles can be prevented during the bonding step. Undergo verification.

In addition, according to Embodiment 2B, since the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of one release film 5 (the surface side of the second adhesive layer 4) in the irradiation step, It is necessary to irradiate the base material 3 and/or the second adhesive layer 4 with a large amount of active light (preferably ultraviolet rays), so that it is easy to control the transmittance of the highly irradiated portion 20 .

Moreover, especially if the adherend 15 is the second adherend 31 , it is possible to suppress coloring of the non-irradiated portion 22 by external light (active light) from the surface side of the second adherend 31 .

2-3-5. Variation example In the above description, the non-irradiated/low-irradiated portion 21 was described as the un-irradiated portion 22 , but in the following description, the un-irradiated/low-irradiated portion 21 may also be referred to as the low-irradiated portion 23 .

When the non-irradiated/low-irradiated portion 21 is the low-irradiated portion 23, the irradiation step includes: the first irradiation step, which is to dispose the first mask 8 that blocks the active light (preferably ultraviolet rays) to the first mask 8. 1 Adhesive layer 2 is irradiated with active light (preferably ultraviolet rays), and the first irradiated part 40 that is irradiated with active light (preferably ultraviolet rays) is formed on the first adhesive layer 2, and the first irradiation part 40 that is not irradiated with active light (preferably ultraviolet rays) is formed on the first adhesive layer 2. ) of the part 41 that has not yet been irradiated; and the second irradiating step, which is to dispose the second mask 9 that blocks the active light (preferably ultraviolet rays) in the first irradiating part 40 to the first adhesive layer 2 The not yet irradiated portion 41 is irradiated with active light rays (preferably ultraviolet rays), so that the not yet irradiated portion 41 becomes the second irradiated portion 42 .

And, the details will be described below, because the irradiation amount of active light (preferably ultraviolet) in the first irradiation step is different from the irradiation amount of active light (preferably ultraviolet) in the second irradiation step, so the second Either one of the first irradiated portion 40 and the second irradiated portion 42 becomes the high irradiated portion 20 , and the other becomes the low irradiated portion 23 .

In the following description, a case where the non-irradiated/low-irradiated portion 21 is the low-irradiated portion 23 in Embodiment 1A will be described with reference to FIG. 11 (hereinafter referred to as a first modification of Embodiment 1A).

In the preparation step, as shown in FIG. 11A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the irradiation step, the first adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) to form a high-irradiation portion 20 with a relatively high irradiation amount of active light rays (preferably ultraviolet rays) on the first adhesive layer 2, and active light rays. The low-irradiation portion 23 where the irradiation amount of light (preferably ultraviolet rays) is relatively low.

Specifically, in the first irradiation step among the irradiation steps, the first irradiated portion 40 and the not yet irradiated portion 41 are formed, and in the second irradiation step among the irradiation steps, the not yet irradiated portion 41 is made into the second irradiated portion 42.

In the first irradiation step, as shown in FIG. 11B , the first irradiation portion 40 is irradiated with active light (preferably ultraviolet rays) from the surface side of the release film 5 on the other side (the surface side of the first adhesive layer 2 ). , for the portion 41 that has not been irradiated yet, active light (preferably ultraviolet rays) is not irradiated.

Furthermore, in the following description, the adhesive sheet 1 is divided into three parts in the plane direction, and two of the two end parts are set as the first irradiation part 40 (in other words, the adhesive sheet 1 is divided into three parts in the plane direction). The upper part is divided into 3 parts, and only one of the central part is the part 41 which has not been irradiated yet) for description.

More specifically, the first shielding part for blocking active light rays (preferably ultraviolet rays) is not arranged on the first irradiation part 40 (specifically, the other side of the release film 5 disposed on the other side of the first irradiation part 40). Cover 8, the first mask 8 for blocking active light (preferably ultraviolet rays) is arranged on the part 41 that has not been irradiated (in detail, it is the other side of the release film 5 disposed on the other side of the part 41 that has not been irradiated), Actinic light rays (preferably ultraviolet rays) are irradiated from the surface side of the release film 5 on the other side (the surface side of the first adhesive layer 2 ).

Thereby, only the 1st irradiation part 40 can be irradiated with actinic light (preferably ultraviolet-ray).

And in the 1st adhesive layer 2 in the 1st irradiation part 40, acid is generate|occur|produced from a photoacid generator, and the compound colored by an acid is colored (specifically, black) by this acid. As a result, the first adhesive layer 2 in the first irradiated portion 40 changes from colorless (transparent) to colored (transmittance of visible light at a wavelength of 550 nm becomes low).

Next, as shown in FIG. 11C , in the second irradiation step, the part 41 not yet irradiated becomes the second irradiated part 42 .

Specifically, in the second irradiation step, the portion 41 that has not yet been irradiated is irradiated from the surface side of the first adhesive layer 2 with active light rays (preferably ultraviolet rays) of a light quantity different from that in the first irradiation step. On the other hand, Actinic light rays (preferably ultraviolet rays) are not irradiated to the first irradiation portion 40 .

More specifically, the second shielding that blocks active light rays (preferably ultraviolet rays) is not arranged on the part 41 that has not been irradiated (specifically, the other side of the release film 5 disposed on the other side of the part 41 that has not been irradiated). Cover 9, the second mask 9 for blocking active light (preferably ultraviolet rays) is arranged on the first irradiation part 40 (in detail, the other side of the release film 5 disposed on the other side of the first irradiation part 40), Active light rays (preferably ultraviolet rays) are irradiated from the surface side of the first adhesive layer 2 .

Thereby, active light rays (preferably ultraviolet rays) can be irradiated only to the part 41 which has not been irradiated yet, and the part 41 which has not been irradiated yet becomes the second irradiated part 42 .

And, in the first adhesive layer 2 in the second irradiated portion 42, acid is generated from the photoacid generator, and the compound colored by the acid is colored (specifically, black) by the acid. As a result, the first adhesive layer 2 in the second irradiated portion 42 changes from colorless (transparent) to colored (visible light transmittance at a wavelength of 550 nm becomes low).

Thereby, the 1st irradiated part 40 and the 2nd irradiated part 42 are formed in the 1st adhesive layer 2. As shown in FIG.

And as mentioned above, in the 2nd irradiation process, the actinic ray (preferably ultraviolet-ray) of light quantity different from the 1st irradiation process is irradiated.

That is, the irradiation amounts of active light rays (preferably ultraviolet rays) of the first irradiation part 40 and the second irradiation part 42 are different from each other.

Therefore, either one of the first irradiating portion 40 and the second irradiating portion 42 becomes the high-irradiating portion 20 with a relatively high irradiation amount of active light (preferably ultraviolet rays) (in other words, the visible light transmittance at a wavelength of 550 nm Relatively low low light transmittance part 11), the other becomes a relatively low low irradiation part 23 with a relatively low irradiation amount of active light (preferably ultraviolet rays) (in other words, the visible light transmittance at a wavelength of 550 nm is relatively high The high light transmittance part 10).

Furthermore, in FIG. 11 , it is assumed that the first irradiated portion 40 is the high irradiated portion 20 (low light transmittance portion 11 ), and the second irradiated portion 42 is described as the low irradiated portion 21 (high light transmittance portion 10 ). .

Specifically, the visible light transmittance at the wavelength of 550 nm of the high-irradiation portion 20 is, for example, less than 20%, preferably less than 10%, and, for example, more than 0.01%. The visible light transmittance is, for example, 20% or more, preferably 40% or more, and, for example, 70% or less.

And, in the sticking step, as shown in FIG. 11D , the other side of the adhesive sheet 1 (the other side of the first adhesive layer 2 ) is stuck to the adherend 15 in the same manner as in the above-mentioned 1A embodiment.

Thus, an intermediate laminate 6 is obtained, which includes an adherend 15, a first adhesive layer 2 disposed on one side of the adherend 15, a base material 3 disposed on one side of the first adhesive layer 2, and a substrate disposed on the base material 3. The second adhesive layer 4 on one side, and the release film 5 disposed on one side of the second adhesive layer.

In addition, in the intermediate laminate 6, the first adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 10 having a relatively small visible light transmittance at a wavelength of 550 nm. Part 11.

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 20% or more, preferably 40% or more, and, for example, 70% or less.

If the visible light transmittance of the low light transmittance portion 11 is within the above range and the visible light transmittance of the high light transmittance portion 10 is within the above range, the difference between the light transmittance portion 11 and the high light transmittance portion 10 can be reliably changed. tone.

According to the first variation example of the first A embodiment, the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exerted, and since the high-irradiation portion 20 (low light transmittance portion 11) and the The low-irradiation portion 23 (high light transmittance portion 10 ), therefore, can manufacture the intermediate laminate 6 including the first adhesive layer 2 having regions with different color tones.

In addition, in particular, if the adherend 15 is the second adherend 31 , the low-irradiation portion 23 can be suppressed from being colored by external light (active light) from the surface side of the second adherend 31 .

Also, when the non-irradiated/low-irradiated portion 21 is the low-irradiated portion 23, the irradiation step includes: a third irradiation step, which is to irradiate the entire adhesive layer 2 with active light rays (preferably ultraviolet rays), so that The whole of the adhesive layer 2 is formed as the 3rd irradiation part 43 that is irradiated to the active light (preferably ultraviolet rays); The remaining part 46 of the 3rd irradiating part is irradiated with active light (preferably ultraviolet ray) after the mask 7 of the ultraviolet ray), so that the remaining part 46 of the 3rd irradiating part 43 becomes the 4th irradiating part 44.

In the following description, a case where the unirradiated/low-irradiated portion 21 is the low-irradiated portion 23 in the first A embodiment (hereinafter referred to as the second modification of the first A embodiment) will be described with reference to FIG. 12 .

In the preparation step, as shown in FIG. 12A , the adhesive sheet 1 is prepared in the same manner as in the above-mentioned 1A embodiment.

In the step of irradiating, the adhesive layer 2 is irradiated with active light (preferably ultraviolet rays) to form a relatively high exposure portion 20 of active light rays (preferably ultraviolet rays) on the adhesive layer 2, and active light rays (preferably ultraviolet rays). The low-irradiation portion 23 where the irradiation amount of ultraviolet rays) is relatively low.

Specifically, in the third irradiation step among the irradiation steps, the third irradiation portion 43 is formed, and in the fourth irradiation step among the irradiation steps, the remaining portion 46 (described below) of the third irradiation portion 43 becomes the fourth irradiation step. The irradiated portion 44 .

In the third irradiation step, as shown in FIG. 12B , the entire adhesive layer 2 is irradiated with active light rays (preferably ultraviolet rays) from the surface side of the release film 5 (the surface side of the first adhesive layer 2 ).

Thereby, the whole of the first adhesive layer 2 is formed as the third irradiated portion 43 .

Moreover, in the 1st adhesive layer 2 (3rd irradiation part 43), acid is generate|occur|produced from a photoacid generator, and the compound colored by an acid is colored (specifically, black) by this acid. As a result, the entire first adhesive layer 2 (the third irradiated portion 43 ) changes from colorless (transparent) to colored (visible light transmittance at a wavelength of 550 nm becomes low).

Then, in the fourth irradiation step, as shown in FIG. 12C , by disposing a mask 7 that blocks active light rays (preferably ultraviolet rays) in a part 45 of the third irradiation part 43, the rest of the third irradiation part 46 to irradiate active light rays (preferably ultraviolet rays), so that the remaining part 46 of the third irradiated portion 43 becomes the fourth irradiated portion 44 .

Furthermore, in the following description, the adhesive sheet 1 is divided into three parts in the plane direction, and the two end parts are set as the remaining part 46 of the third irradiation part 43 (in other words, the adhesive sheet 1 is divided into three parts in the plane direction, and only the center part 1 is a part 45 of the third irradiation part 43) and will be described.

Specifically, in the fourth irradiation step, the remaining part 46 of the third irradiation part 43 is irradiated with active light (preferably ultraviolet rays) from the surface side of the first adhesive layer 2, and on the other hand, the third irradiation part The remaining part of 43 is not irradiated with active light (preferably ultraviolet).

More specifically, the remaining part 46 of the third irradiating part 43 (specifically, the other side of the release film 5 arranged on the other side of the remaining part 46 of the third irradiating part 43) is not configured to block the active light (compared to the other side). Preferably, the mask 7 of ultraviolet rays) is configured to block the active light ( The mask 7, which is preferably ultraviolet rays, irradiates active light rays (preferably ultraviolet rays) from the surface side of the first adhesive layer 2.

Thereby, only the remaining part 46 of the third irradiating part 43 can be irradiated with active light (preferably ultraviolet rays), and the remaining part 46 of the third irradiating part 43 becomes the fourth irradiating part 44 .

And, in the first adhesive layer 2 in the fourth irradiated portion 44, acid is generated from the photoacid generator, and the compound colored by the acid is colored (specifically, black) by the acid. As a result, the adhesive layer 2 in the fourth irradiation portion 44 changes from colorless (transparent) to colored (visible light transmittance at a wavelength of 550 nm becomes low).

Thereby, the visible light transmittance in the wavelength 550 nm of the 4th irradiation part 44 becomes lower than the 3rd irradiation part 43.

That is, the third irradiation portion 43 becomes the low irradiation portion 23 with a relatively low irradiation amount of active light (preferably ultraviolet rays) (in other words, the high light transmittance portion 10 with a relatively high visible light transmittance at a wavelength of 550 nm), The fourth irradiating portion 44 becomes the high irradiating portion 20 with a relatively high irradiation amount of active light (preferably ultraviolet rays) (in other words, the low light transmittance portion 11 with relatively low visible light transmittance at a wavelength of 550 nm).

Specifically, the visible light transmittance at the wavelength of 550 nm of the high-irradiation portion 20 is, for example, less than 20%, preferably less than 10%, and, for example, more than 0.01%. The visible light transmittance is, for example, 20% or more, preferably 40% or more, and, for example, 70% or less.

And, in the sticking step, as shown in FIG. 12D , the other side of the adhesive sheet 1 (the other side of the adhesive layer 2 ) is stuck to the adherend 15 in the same manner as in the above-mentioned 1A embodiment.

Thus, an intermediate laminate 6 is obtained, which includes an adherend 15, a first adhesive layer 2 disposed on one side of the adherend 15, a base material 3 disposed on one side of the first adhesive layer 2, and a substrate disposed on the base material 3. The second adhesive layer 4 on one side, and the release film 5 disposed on one side of the second adhesive layer.

In addition, in the intermediate laminate 6, the adhesive layer 2 has a high light transmittance portion 10 having a relatively high visible light transmittance at a wavelength of 550 nm, and a low light transmittance portion 11 having a relatively small visible light transmittance at a wavelength of 550 nm. .

In addition, in the intermediate laminate 6, the visible light transmittance of the low light transmittance portion 11 at a wavelength of 550 nm is, for example, less than 20%, preferably 10% or less, and, for example, 0.01% or more, and the high light transmittance The visible light transmittance of the high-efficiency part 10 at a wavelength of 550 nm is, for example, 20% or more, preferably 40% or more, and, for example, 70% or less.

If the visible light transmittance of the low light transmittance portion 11 is within the above range and the visible light transmittance of the high light transmittance portion 10 is within the above range, the difference between the light transmittance portion 11 and the high light transmittance portion 10 can be reliably changed. tone.

According to the second modification of the first A embodiment, the effect of the above-mentioned manufacturing method of the intermediate laminate 6 is exerted, and since the high-irradiation portion 20 (low light transmittance portion 11) and The low-irradiation portion 23 (high light transmittance portion 10 ), therefore, can manufacture the intermediate laminate 6 including the adhesive layer 2 having regions with different color tones.

In addition, in particular, if the adherend 15 is the second adherend 31 , the low-irradiation portion 23 can be suppressed from being colored by external light (active light) from the surface side of the second adherend 31 .

In the above description, the case where the unirradiated/low-irradiated portion 21 is set as the low-irradiated portion 23 in the 1A embodiment has been described, and in the 1B embodiment and the 2A embodiment (using the first adherend) case) and the 2B embodiment, the non-irradiated/lowly irradiated portion 21 can also be set as the low-irradiated portion 23 based on the same procedure as the irradiation step in the first variation or the second variation of the above-mentioned 1A embodiment.

In addition, the intermediate laminate 6 in which the low light transmittance portion 11 in the first adhesive layer 2 has a pattern shape can also be obtained by using a plurality of masks 7 for blocking active light rays (preferably ultraviolet rays).

Specifically, in the irradiation step of Embodiment 1A, as shown in FIG. 13A , on the other side of the release film 5 on the other side, a plurality of masks 7 (detailed details) for blocking active light rays (preferably ultraviolet rays) are arranged. In other words, four are arranged at intervals from each other).

In addition, by carrying out the preparatory step, the irradiation step, and the lamination step in the same manner as in the above-mentioned 1A embodiment, an intermediate laminate in which the low light transmittance portion 11 in the first adhesive layer 2 has a pattern shape can be obtained as shown in FIG. 13B 6.

In the intermediate laminate 6, if the low light transmittance portion 11 has a pattern shape, the pattern shape can be freely designed. [Example]

Examples and comparative examples are disclosed below, and the present invention will be described more specifically. In addition, this invention is not limited at all by an Example and a comparative example. In addition, specific numerical values such as blending ratios (content ratios), physical property values, and parameters used in the following descriptions may be replaced by corresponding blending ratios (content ratios), physical property values, parameters, etc. described in the above "embodiments" The upper limit value (the value defined by "below" and "less than") or the lower limit value (the value defined by "above" and "exceeding") of the corresponding record.

Furthermore, "parts" and "%" are quality standards unless otherwise specified.

1. Details of components Each component used in each Example and each comparative example is described below. BA: Butyl acrylate AA: Acrylic acid 2EHA: 2-Ethylhexyl acrylate NVP: N-vinylpyrrolidone MMA: Methyl methacrylate HEA: Hydroxyethyl acrylate Tetrad C: Trade name: 1,3-bis (N,N-diglycidylaminomethyl)cyclohexane (epoxy-based crosslinking agent), manufactured by Mitsubishi Gas Chemical BLACK ND1: leuco dye, manufactured by Yamada Chemical Industry CPI-310B: contains calcite and (C ₆ F ₅ ) ₄ B ^- salt, photoacid generator, manufactured by San-Apro KC2UA: TAC film, thickness 25 μm, manufactured by Konica Minolta Co., Ltd. UVA (ultraviolet-A, ultraviolet A)-TAC: KC2UA in sequence and a hard coat film (obtained by forming a hard coat layer (thickness: 7 μm) on one side of KC2UA (thickness: 25 μm) by hard coating treatment), a thickness of 32 μm UVA-OCA (Optically Clear Adhesive, optically transparent Adhesive): Adhesive tape with ultraviolet absorbing function, trade name "CS9934U", thickness 100 μm, PET film manufactured by Nitto Denko Co., Ltd.: thickness 25 μm

2. Preparation of adhesive sheet Example 1 95 parts by mass of butyl acrylate as a monomer component, 5 parts by mass of acrylic acid, and 0.2 parts by mass of azobisisobutyronitrile as a polymerization initiator were charged into a reaction vessel equipped with a thermometer, a stirrer, a reflux cooling pipe, and a nitrogen gas introduction pipe. 233 parts by mass of ethyl acetate as a solvent, nitrogen gas was passed through, and nitrogen replacement was performed for about 1 hour while stirring. Thereafter, it was heated to 60° C. and reacted for 7 hours to obtain a solution of an adhesive polymer having a weight average molecular weight (Mw) of 600,000.

To the solution of the adhesive polymer, 0.075 parts by mass of Tetrad C as a crosslinking agent was added to 100 parts by mass of the adhesive polymer in the solution of the adhesive polymer, and Tetrad C was added to the solution of the adhesive polymer. 2 parts by mass of BLACK ND1 (leuco dye) as a compound colored by acid for 100 parts by mass of the adhesive polymer, 10 parts by mass of 100 parts by mass of the adhesive polymer in the solution of the adhesive polymer CP-310B (photoacid generator) which is an acid generator was mixed uniformly, and the 1st adhesive composition was prepared.

Next, Synthesis Example 1 was coated on one side of a polyethylene terephthalate film with a thickness of 50 μm (hereinafter referred to as release film A) with a release treatment on the surface using a grooved roll so that the thickness after drying became 25 μm. The first adhesive composition was dried at 130° C. for 1 minute to remove the solvent. Thereby, the adhesive layer provided with the peeling film A on the other side was formed. Then, the release-treated surface of the release film B (polyethylene terephthalate film with a thickness of 25 μm and a silicone release treatment on the surface) was attached to one side of the adhesive layer. Thereafter, an aging treatment was carried out for 4 days in an environment of 25° C. to allow a cross-linking reaction to proceed. In this way, the first adhesive layer is produced (prepared).

Then, the release film B arranged on one side of the first adhesive layer is peeled off, and a glass substrate, a low-adhesive layer containing a known adhesive, and a base material (substrate A) are sequentially arranged on one side of the first adhesive layer. PET film, high adhesive layer containing known adhesive, PET film as substrate (substrate B), UVA-OCA as second adhesive layer, and release film C (polyethylene terephthalate film ).

Furthermore, the low-adhesive layer has the adhesive force of the grade which can peel off a glass substrate and a PET film.

Also, the average transmittance of ultraviolet rays of the low adhesive layer and the high adhesive layer is 50% or more.

In this way, a release film A, a first adhesive layer, a glass substrate, a low adhesive layer, a PET film (substrate A), a high adhesive layer, a PET film (substrate B), a second adhesive layer, and Adhesive sheet of release film C.

Example 2 An adhesive sheet was produced in the same manner as in Example 1 except that UVA-TAC was used as the base material B and the second adhesive layer A was used as the second adhesive layer.

In addition, the 2nd adhesive layer A was prepared by the following method.

(Preparation of the second adhesive layer A) Put 63 parts by mass of 2-ethylhexyl acrylate (2EHA) and 15 parts by mass of N-vinylpyrrolidone (NVP) as monomer components into a reaction vessel equipped with a thermometer, a stirrer, a reflux cooling pipe, and a nitrogen gas introduction pipe , 9 parts by mass of methyl methacrylate (MMA), 13 parts by mass of hydroxyethyl acrylate (HEA), 0.2 parts by weight of azobisisobutyronitrile as a polymerization initiator, 233 parts by weight of ethyl acetate as a solvent , nitrogen gas was blown in, and nitrogen replacement was performed for about 1 hour while stirring. Then, it heated to 60 degreeC, and it was made to react for 7 hours, and the 3rd adhesive composition whose weight average molecular weight (Mw) was 1,200,000 was obtained.

A polyethylene terephthalate (PET) film (manufactured by Mitsubishi Chemical) having a thickness of 75 μm and a polysiloxane-based release layer on the surface of the substrate was provided with a grooved roll so that the thickness after drying became 50 μm. "DIAFOIL MRF75") was coated with this third adhesive composition, and was cured and dried at a drying temperature of 130° C. and a drying time of 30 seconds. A PET film ("DIAFOIL MRE75" manufactured by Mitsubishi Chemical) with a thickness of 75 μm ("DIAFOIL MRE75" manufactured by Mitsubishi Chemical) was bonded on the coating film as a cover sheet (release film) to produce (prepare) a 50 μm The second adhesive layer A.

Example 3 An adhesive sheet was produced in the same manner as in Example 1 except that UVA-TAC was used as the base material B and UVA-OCA was used as the second adhesive layer.

Comparative example 1 An adhesive sheet was produced in the same manner as in Example 1 except that the PET film was used as the base material B and the second adhesive layer A was used as the second adhesive layer.

4. Evaluation (The average transmittance of the first adhesive layer before LED (Light Emitting Diode) irradiation) The peeling film B arrange|positioned on the surface of the 1st adhesive layer of Example 1 was peeled off, and the surface of the 1st adhesive layer was bonded to the glass substrate.

Thereafter, the release film A disposed on the other surface of the first adhesive layer is peeled off. In this way, a sample for measuring the average transmittance was prepared.

The sample for measuring the average transmittance was set in a transmittance measuring device (U4100 spectrophotometer, manufactured by Japan High-Technologies Co., Ltd.) with the first adhesive layer arranged on the light source side, and measured at a wavelength of 400 nm to 700 nm. average transmittance.

Furthermore, the data measured only on the glass substrate was set as the baseline.

The results are shown in Table 1.

(Average transmittance of the first adhesive layer after LED irradiation) After irradiating the light of LED (365 nm, 8000 mJ/□) to the first adhesive layer in the above average transmittance measurement sample, the average transmittance at a wavelength of 400 nm to 700 nm was measured by the same method as above.

The results are shown in Table 1.

(Average transmittance of substrate B and the second adhesive layer) Each base material B, each second adhesive layer, and the result obtained by pasting the base material B and the second adhesive layer were set in a transmittance measuring device (U4100 spectrophotometer, manufactured by Japan High-Technologies Co., Ltd.), and measured respectively The average transmittance at a wavelength of 300 nm to 400 nm and the average transmittance at a wavelength of 400 nm to 700 nm.

Furthermore, the data measured in the state where nothing is installed in the measuring device is set as the baseline.

The results are shown in Table 1.

(outside light stability) The adhesive sheets of each Example and each Comparative Example were placed so that the light of the fluorescent lamp was irradiated from the second adhesive layer side of the adhesive sheets of each Example and each Comparative Example.

Then, the average transmittance at a wavelength of 400 nm to 700 nm was measured at the start of leaving and after a certain period of time (after 24 hours, 48 hours, 120 hours, and 144 hours) after the start of leaving.

Specifically, the self-adhesive sheet peels off the low-adhesive layer, PET film, high-adhesive layer, base material B, second adhesive layer, and release film C disposed on one side of the glass substrate, and then separates the self-adhesive sheet disposed on the second side. 1 Peel off the release film A on the other side of the adhesive layer.

In this manner, a sample for measuring the external light stability provided with the first adhesive layer and the glass substrate in this order was prepared.

In addition, the sample for external light stability measurement was set in a transmittance measurement device (U4100 spectrophotometer, manufactured by Japan High-Technologies Co., Ltd.) with the adhesive layer disposed on the light source side, and the measurement wavelength was 400 nm to 700 nm. the average transmittance.

Furthermore, the data measured only on the glass substrate was set as the baseline.

Moreover, the rate of change after each elapse of time was calculated|required by the following formula (1). Change rate after each time = (average transmittance at the beginning of placement - average transmittance after each time) / (average transmittance at the beginning of placement) (1)

The results are shown in Table 2.

5. Explore In the evaluation of the average transmittance, the wavelength of the adhesive sheet of Example 1 in which the first adhesive layer contains the first adhesive composition that can reduce the visible light transmittance at a wavelength of 550 nm by irradiation of ultraviolet rays before and after irradiation with LED The average transmittance at 400 nm to 700 nm decreases.

From this, it turns out that if the adhesive sheet provided with the said 1st adhesive layer is used, the adhesive layer can be colored by irradiating an ultraviolet-ray at arbitrary timing.

In the evaluation of the external light stability, the substrate and/or the second adhesive layer with a wavelength of 300 nm to 400 nm and an average transmittance of 15% or less were used in Examples 1 to 3 after 120 The rate of change after hours is below 1.11% to 5.72%.

On the other hand, comparative example 1 using a PET film with an average transmittance of 69% at a wavelength of 300 nm to 400 nm as a base material and using the above-mentioned second adhesive layer A with an average transmittance of 65.17% as a second adhesive layer The rate of change after 120 hours from the start of storage was 64.02%.

From this, it can be seen that if the base material and/or the second adhesive layer with a wavelength of 300 nm to 400 nm and an average transmittance of 15% or less are used, the external light stability is excellent.

In addition, it was found that since the external light stability is excellent, when it is desired to leave the colored portion in the adhesive layer transparently, or when it is desired to make the amount of coloring less than that of the colored portion, the external light ( UV) coloring. [Table 1] Table 1 Example Average transmittance Before LED light irradiation After LED light irradiation Example 1 95.64 16.92 [Table 2] Table 2 Example・Comparative Example No. Substrate 2nd adhesive layer Substrate + 2nd adhesive layer external light stability Average transmittance at a wavelength of 400 to 700 nm (change rate after each time (%)) type Average transmittance at a wavelength of 300-400 nm Average transmittance at a wavelength of 400-700 nm type Average transmittance at a wavelength of 300-400 nm Average transmittance at a wavelength of 400-700 nm Average transmittance at a wavelength of 300-400 nm Average transmittance at a wavelength of 400-700 nm when placement starts 24 hours later 48 hours later 120 hours later Comparative example 1 PET film 69.00 87.00 2nd Adhesive Layer A 65.17 87.74 64.33 86.44 95.64 75.65 (20.9%) 55.92 (41.53%) 34.41 (64.02%) Example 1 PET film 69.00 87.00 UVA-OCA 9.54 87.50 9.01 89.40 95.64 94.87 (0.81%) 93.96 (1.76%) 90.4 (1.11%) Example 2 UVA-TAC 11.91 90.21 2nd Adhesive Layer A 65.17 87.74 11.83 90.12 95.64 94.22 (1.48%) 93.49 (2.25%) 90.17 (5.71%) Example 3 UVA-TAC 11.91 90.21 UVA-OCA 9.54 87.50 8.07 90.90 95.64 94.89 (0.78%) 94.11 (1.60%) 91.08 (4.76%)

In addition, the above-mentioned invention is provided as an exemplary embodiment of the present invention, but it is only an illustration and should not be construed in a limited manner. Modifications of the present invention that are obvious to those skilled in the art are included in the following claims. [Industrial availability]

The adhesive sheet, the method for producing the adhesive sheet, the method for producing the intermediate laminate, and the intermediate laminate of the present invention can be suitably used in optical devices, electronic devices, and components thereof.

1: Adhesive sheet 2: The first adhesive layer 3: Substrate 4: The second adhesive layer 5: Peel off film 6: Intermediate laminate 7: mask 8: 1st mask 9: 2nd mask 10: High light transmittance part 11: Low light transmittance part 15: Adhered body 20: Highly irradiated part 21: Non-irradiated/low-irradiated part 22: Unirradiated part 23: Low exposure part 30: The first adherend 31: The second adherend 40: 1st irradiation part 41: The part that has not been irradiated yet 42: The second irradiation part 43: Part 3 Irradiation 44: Part 4 Irradiation 45: part 46: The rest 51: The part that will be irradiated with active light (preferably ultraviolet rays) 52: Part not irradiated with active light (preferably ultraviolet rays)

Fig. 1 discloses a schematic view showing an embodiment of the adhesive sheet of the present invention, Fig. 1A shows an embodiment of the adhesive sheet of the present invention, Fig. 1B shows an adhesive sheet in which only the substrate has active light absorption, and Fig. 1C 1D shows an adhesive sheet in which only the second adhesive layer has active ray absorptivity, and FIG. 1D shows an adhesive sheet in which both the base material and the second adhesive layer have active ray absorptivity. Fig. 2 is a schematic diagram showing an embodiment of a method for producing an adhesive sheet, Fig. 2A shows a first adhesive layer preparation step for preparing a first adhesive layer, and Fig. 2B shows a base material with a base material disposed on one side of the first adhesive layer Arrangement step, Fig. 2C shows the second adhesive layer arrangement step of arranging the second adhesive layer on one side of the substrate. Fig. 3 is a schematic view showing an embodiment of a method of manufacturing an adhesive sheet (the situation of irradiating the whole of the first adhesive layer with active light), and Fig. 3A shows the preparation steps of the first adhesive layer for preparing the first adhesive layer, and Fig. 3B It shows the step of irradiating the whole of the first adhesive layer with active light from the surface side of the release film. FIG. 3C shows the step of arranging the base material on one side of the first adhesive layer. FIG. 3D shows the step of arranging the second adhesive layer on one side of the base material. The step of disposing the second adhesive layer of the adhesive layer, Fig. 3E shows the step of replacing and attaching the release film as the base material and the second adhesive layer. Fig. 4 is a schematic diagram showing an embodiment of a method for producing an adhesive sheet (a case of irradiating a part of the first adhesive layer with active light), and Fig. 4A shows a part of the first adhesive layer irradiated with active light from the surface side of the release film. The steps of light, Figure 4B shows the step of disposing the base material on one side of the first adhesive layer, Figure 4C shows the step of disposing the second adhesive layer on one side of the base material, Figure 4D shows the step of disposing the release film The steps of replacing and attaching all of the peeling film as the base material and the second adhesive layer are shown in Figure 4E. Fig. 5 is a schematic view showing an embodiment of the intermediate laminate of the present invention. Fig. 6 is a schematic view showing the 1A embodiment of the manufacturing method of the intermediate laminate of the present invention. Fig. 6A shows the preparation steps for preparing the adhesive sheet, and Fig. 6B shows the surface side of the release film from the other side (the first adhesive sheet). The surface side of the layer) is a step of irradiating the first adhesive layer with active light rays. FIG. 6C shows a step of bonding the adhesive sheet to the adherend. Fig. 7 is a schematic diagram showing the 1B embodiment of the manufacturing method of the intermediate laminate of the present invention, Fig. 7A shows the preparation steps for preparing the adhesive sheet, and Fig. 7B shows the surface side of the release film from one side (the second adhesive layer surface side) of the irradiation step of irradiating the first adhesive layer with active light, and Fig. 7C shows the step of attaching the adhesive sheet to the adherend. Fig. 8 is a schematic view showing Embodiment 2A of the method for producing an intermediate laminate of the present invention (the case where the adherend is the first adherend), and Fig. 8A shows the preparatory steps for preparing an adhesive sheet, and Fig. 8B shows the preparation of the adhesive sheet. The step of attaching the adhesive sheet to the first adherend, FIG. 8C shows the irradiation step of irradiating the first adhesive layer with active light from the surface side of the first adherend, and FIG. 8D shows the second A embodiment (adhered The intermediate laminate produced in the case where the body is the first adherend). Fig. 9 is a schematic view showing Embodiment 2A of the method for producing the intermediate laminate of the present invention (the adherend is the second adherend), and Fig. 9A shows the preparation steps for preparing the adhesive sheet, and Fig. 9B shows the preparation of the adhesive sheet. The step of attaching the adhesive sheet to the second adherend, FIG. 9C shows the step of irradiating the first adhesive layer with active light from the surface side of the second adherend, and FIG. 9D shows the second A embodiment (adhered The intermediate laminate produced in the case where the body is the second adherend). Fig. 10 is a schematic view showing the second embodiment of the method of manufacturing the intermediate laminate of the present invention, Fig. 10A shows the preparation step of preparing the adhesive sheet, and Fig. 10B shows the step of attaching the adhesive sheet to the adherend 10C shows the step of irradiating the first adhesive layer with active light from the surface side of the release film on one side (the surface side of the second adhesive layer), and FIG. 10D shows the intermediate laminate produced in the 2B embodiment. Fig. 11 is a schematic diagram showing the first modification of the first embodiment of the first A embodiment of the method for manufacturing the intermediate laminate of the present invention. Fig. 11A shows the preparation steps for preparing the adhesive sheet, and Fig. 11B shows the formation of the first adhesive sheet by irradiating active light rays. The first irradiation step of the irradiated part and the not yet irradiated part. Figure 11C shows the second irradiation step of forming the not yet irradiated part into the second irradiated part by irradiating active light to the not yet irradiated part. Figure 11D shows the adhesion The step of attaching the sheet to the adherend. Fig. 12 is a schematic view showing the second modification of the first A embodiment of the manufacturing method of the intermediate laminate of the present invention. Fig. 12A shows the preparatory steps for preparing the adhesive sheet, and Fig. 12B shows the method for preparing the entire first adhesive layer. The third irradiation step of irradiating active light so that the entire first adhesive layer is formed as the third irradiated part. FIG. 12C shows the third irradiated part after a mask that blocks active light is arranged on a part of the third irradiated part. The remaining part is irradiated with active light, and the remaining part of the third irradiated part is formed into the fourth irradiated part in the fourth irradiated step. FIG. 12D shows the bonding step of bonding the adhesive sheet to the adherend. Fig. 13 is a schematic diagram showing a method of manufacturing an intermediate laminate in which the low light transmittance portion in the first adhesive layer has a pattern shape. Fig. 13A shows the irradiation steps of disposing a plurality of masks for blocking active light rays, and Fig. 13B shows the steps of the first 1. An intermediate laminate in which the low light transmittance portion of the adhesive layer has a pattern shape.

1: Adhesive sheet

2: The first adhesive layer

3: Substrate

4: The second adhesive layer

Claims (25)

An adhesive sheet, characterized by comprising a first adhesive layer, a base material disposed on one side of the first adhesive layer, and a second adhesive layer disposed on one side of the base material, The above-mentioned first adhesive layer includes an adhesive composition that can reduce the visible light transmittance at a wavelength of 550 nm by irradiation of active light rays, and The average transmittance of active light rays of the substrate and/or the second adhesive layer is 15% or less. The adhesive sheet according to claim 1, wherein the first adhesive layer comprises an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of ultraviolet rays, and The average transmittance of the base material and/or the second adhesive layer at a wavelength of not less than 300 nm and not more than 400 nm is not more than 15%. The adhesive sheet according to claim 2, wherein the average transmittance of the substrate and/or the second adhesive layer at a wavelength of 400 nm or more and 700 nm or less is 50% or more. The adhesive sheet according to claim 2, wherein the base material and/or the second adhesive layer contain an ultraviolet absorber. The adhesive sheet according to any one of claims 1 to 4, wherein the above-mentioned adhesive composition comprises an adhesive polymer as a monomer component polymer, a compound colored by an acid, and a photoacid generator. A method of manufacturing an adhesive sheet, characterized by comprising the following steps: a first adhesive layer preparation step, which is to prepare an adhesive composition comprising an adhesive composition that can reduce the transmittance of visible light at a wavelength of 550 nm by irradiation of active light rays; Floor; a substrate arranging step, which is to arrange the substrate on one side of the first adhesive layer; and a step of arranging a second adhesive layer, comprising arranging a second adhesive layer on one side of the substrate; and The average transmittance of active light rays of the substrate and/or the second adhesive layer is 15% or less. The method for producing an adhesive sheet according to claim 6, wherein after the above-mentioned first adhesive layer preparation step and before the above-mentioned substrate arrangement step, The above-mentioned first adhesive layer is irradiated with active light. The method for producing an adhesive sheet according to claim 6, wherein the first adhesive layer is irradiated with active light after the step of arranging the second adhesive layer. A method for manufacturing an intermediate laminate, characterized by comprising the following steps: a preparation step, which is to prepare an adhesive sheet manufactured by the method for manufacturing an adhesive sheet according to claim 8; The irradiation step is to irradiate the above-mentioned first adhesive layer with active light to form a high-irradiation part where the irradiation amount of active light is relatively high, and the irradiation amount of active light is relatively low or no active light is irradiated on the above-mentioned first adhesive layer. The non-irradiated/low-irradiated portion, whereby the visible light transmittance of the above-mentioned high-irradiated portion at a wavelength of 550 nm is smaller than the visible light transmittance of the above-mentioned un-irradiated/low-irradiated portion at a wavelength of 550 nm; and Attaching step, which is attaching the other side of the above-mentioned adhesive sheet to the adherend. The method of manufacturing an intermediate laminate according to Claim 9, wherein the above-mentioned irradiation step is carried out after the above-mentioned preparation step, and The above-mentioned bonding step is carried out after the above-mentioned irradiation step. The manufacturing method of the intermediate laminate according to claim 9, wherein the above-mentioned bonding step is carried out after the above-mentioned preparation step, and The above-mentioned irradiation step is carried out after the above-mentioned bonding step. The method of manufacturing an intermediate laminate according to claim 10, wherein in the irradiation step, the first adhesive layer is irradiated with active light from the surface side of the second adhesive layer. The method of manufacturing an intermediate laminate according to claim 11, wherein in the irradiation step, the first adhesive layer is irradiated with active light from the surface side of the second adhesive layer. The method of manufacturing an intermediate laminate according to claim 10, wherein in the irradiation step, the first adhesive layer is irradiated with active light from the surface side of the first adhesive layer. The method of manufacturing an intermediate laminate according to claim 11, wherein in the irradiation step, the first adhesive layer is irradiated with active light from the surface side of the adherend. The method of manufacturing an intermediate laminate according to claim 15, wherein the average transmittance of the active light rays of the above-mentioned adherend is 60% or more, and In the irradiating step, after disposing a mask for blocking active light on a part of the other surface on the side of the adherend, the first adhesive layer is irradiated with active light. The method of manufacturing an intermediate laminate according to claim 15, wherein the above-mentioned adherend blocks active light, and In the bonding step, the adherend is disposed on a part of the other side of the adhesive sheet. The method for manufacturing an intermediate laminate according to any one of Claims 9 to 17, wherein the above-mentioned unirradiated/low-irradiated portion is an unirradiated portion that is not irradiated with active light, and The visible light transmittance of the unirradiated portion at a wavelength of 550 nm is above 80%. The method for manufacturing an intermediate laminate according to any one of Claims 9 to 16, wherein the non-irradiated/low-irradiated portion is a low-irradiated portion with a low amount of active light, The above step of irradiating includes: a first step of irradiating, which is to irradiate the first adhesive layer with active light after arranging a first mask that blocks the active light, so as to form a first layer irradiated with active light on the first adhesive layer. The irradiated part, and the temporarily unirradiated part that has not been irradiated with active light; and The second irradiating step is to irradiate the part of the first adhesive layer that has not been irradiated with active light after arranging a second mask that blocks active light in the first irradiated part, so that the part that has not been irradiated formed as a second irradiated portion; and Either one of the first irradiated portion and the second irradiated portion is the high irradiated portion, and the other is the low irradiated portion. The method for manufacturing an intermediate laminate according to any one of Claims 9 to 16, wherein the non-irradiated/low-irradiated portion is a low-irradiated portion with a low amount of active light, The irradiating step includes: a third irradiating step of irradiating the entire first adhesive layer with active light to form the entire first adhesive layer as a third irradiated portion irradiated with active light; and The fourth irradiating step is to irradiate the remaining part of the third irradiating part with active light after arranging a mask for blocking active light rays on a part of the third irradiating part, so that the remaining part of the third irradiating part is formed. is the 4th irradiation part; and The above-mentioned third irradiated portion is the above-mentioned low-irradiated portion, The said 4th irradiation part is the said high irradiation part. The manufacturing method of the intermediate laminate as claimed in item 19, wherein the visible light transmittance at the wavelength of 550 nm of the above-mentioned highly irradiated part is less than 20%, The visible light transmittance at the wavelength of 550 nm of the above-mentioned low-irradiation portion is not less than 20% and not more than 70%. An intermediate laminate, characterized by comprising: an adhesive sheet comprising a first adhesive layer, a base material disposed on one side of the first adhesive layer, and a second adhesive layer disposed on one side of the base material; and a bedding Adhesive, which is arranged on the other side of the above-mentioned adhesive sheet; The above-mentioned first adhesive layer has a high light transmittance part with a relatively large visible light transmittance at a wavelength of 550 nm, and a low light transmittance part with a relatively small visible light transmittance at a wavelength of 550 nm, and The average transmittance of active light rays of the substrate and/or the second adhesive layer is 15% or less. The intermediate laminate according to claim 22, wherein the above-mentioned low light transmittance portion has a pattern shape. The intermediate laminate according to claim 22 or 23, wherein the visible light transmittance at a wavelength of 550 nm of the above-mentioned high light transmittance part is above 80%. The intermediate laminate of claim 22 or 23, wherein the visible light transmittance at the wavelength of 550 nm of the above-mentioned low light transmittance part is less than 20%, and The visible light transmittance at a wavelength of 550 nm of the above-mentioned high light transmittance portion is not less than 20% and not more than 70%.

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