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WO2024122514A1 - Film de résine thermoplastique, stratifié et stratifié optique - Google Patents

Film de résine thermoplastique, stratifié et stratifié optique Download PDF

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Publication number
WO2024122514A1
WO2024122514A1 PCT/JP2023/043349 JP2023043349W WO2024122514A1 WO 2024122514 A1 WO2024122514 A1 WO 2024122514A1 JP 2023043349 W JP2023043349 W JP 2023043349W WO 2024122514 A1 WO2024122514 A1 WO 2024122514A1
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WIPO (PCT)
Prior art keywords
thermoplastic resin
layer
resin film
less
film
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PCT/JP2023/043349
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English (en)
Japanese (ja)
Inventor
一樹 清水
慶介 野村
敦 野原
優馬 ▲高▼橋
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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Priority to JP2023578061A priority Critical patent/JPWO2024122514A1/ja
Publication of WO2024122514A1 publication Critical patent/WO2024122514A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor

Definitions

  • the present invention relates to a thermoplastic resin film, a laminate including the thermoplastic resin film, and an optical laminate including the thermoplastic resin film or the laminate.
  • laminated glass which is made by inserting an interlayer between two glass sheets to bond them together.
  • Interlayers are often made from plasticized polyvinyl acetal, which is a polyvinyl acetal resin mixed with a plasticizer.
  • Laminated glass is safe because even if it is broken by external impact, few glass fragments are scattered, so it is widely used as window glass for vehicles such as automobiles, aircraft, buildings, etc.
  • Laminated glass is generally produced by arranging two glass sheets with an interlayer, performing a preliminary degassing process, and then heating and pressurizing the glass and the interlayer in an autoclave (ACV) process at a temperature of about 130 to 140°C and a pressure of about 1.3 MPa.
  • ACV autoclave
  • Patent Document 1 discloses a laminated glass interlayer that exhibits a certain range of thickness change when subjected to a compression creep test.
  • a functional film such as a photochromic element may be placed between two glass sheets.
  • a functional film such as a photochromic element
  • an interlayer film is placed between the functional film and each glass sheet, and the two glass sheets and the functional film are integrated via the interlayer film (see, for example, Patent Document 2).
  • the present invention aims to provide a thermoplastic resin film with good high-temperature resistance that can suppress the residual air during compression without the need for an autoclave process under high-temperature and high-pressure conditions, a laminate that includes the thermoplastic resin film, and an optical laminate that includes the thermoplastic resin film or the laminate.
  • thermoplastic resin film that is made of a thermoplastic resin with a weight-average molecular weight of 230,000 or more and 310,000 or less, and that changes in thickness by 80 ⁇ m or more when compressed in a specified compression creep test, and thus completed the present invention. That is, the present invention provides the following [1] to [26].
  • thermoplastic resin film having a single-layer structure or a multi-layer structure, At least a thermoplastic resin layer (A) containing a thermoplastic resin, When the thermoplastic resin film has a multi-layer structure, at least one outermost layer is the thermoplastic resin layer (A), the thermoplastic resin layer (A) has a thickness change of 80 ⁇ m or more when compressed in a compression creep test carried out under the following conditions, The thermoplastic resin film, wherein the weight average molecular weight (Mw) of the thermoplastic resin (a) in the thermoplastic resin layer (A) is 220,000 or more and 310,000 or less.
  • Mw weight average molecular weight
  • a test sample having a diameter of 8 mm and a thickness of 700 to 900 ⁇ m made from the thermoplastic resin layer (A) is compressed for 5 minutes under conditions of a load of 410 g and 30° C., and then the thickness (T1) of the test sample is measured. Thereafter, while maintaining the load of 410 g, the temperature is increased from 30° C. to 90° C. at a heating rate of 6° C./min. Then, after compressing for 5 minutes under conditions of a load of 410 g and 90° C., the thickness (T2) of the test sample A is measured. The absolute value of the difference between the thickness (T1) and the thickness (T2) of the test sample is defined as the thickness change amount.
  • thermoplastic resin film according to the above [1], wherein the thickness change is 400 ⁇ m or less.
  • thermoplastic resin film according to the above [1] or [2], wherein the molecular weight distribution (Mw/Mn) of the thermoplastic resin (a) in the thermoplastic resin layer (A) is 2.5 or less.
  • thermoplastic resin film according to any one of [1] to [3] above, wherein the content of the resin having a weight average molecular weight (Mw) of 100,000 or less in the thermoplastic resin (a) in the thermoplastic resin layer (A) is 25 mass% or less.
  • thermoplastic resin film according to any one of the above [1] to [6] contains a polyvinyl acetal resin and a plasticizer.
  • the content of the plasticizer is 30 to 50 parts by mass per 100 parts by mass of the polyvinyl acetal resin.
  • the content of the plasticizer is 10 parts by mass or more and 100 parts by mass or less relative to 100 parts by mass of the thermoplastic resin (a) contained in the thermoplastic resin layer (A).
  • thermoplastic resin film according to any one of [11] to [12].
  • plasticizer is at least one selected from the group consisting of organic ester plasticizers, organic phosphate ester plasticizers, organic phosphite ester plasticizers, polyalkylene glycol plasticizers, polyoxyalkylene ether plasticizers, and alcohol plasticizers.
  • a laminate comprising the thermoplastic resin film according to any one of [1] to [15] above, and a functional layer different from the thermoplastic resin film.
  • An optical laminate comprising a first transparent substrate, a second transparent substrate, and the laminate according to any one of [16] to [19] above, disposed between the first and second transparent substrates.
  • thermoplastic resin film contains a polyvinyl acetal resin
  • polyvinyl acetal resin is produced by a method including a mixing step of mixing the polyvinyl alcohol and the aldehyde, and an aging step of aging the mixture obtained in the mixing step, and the aging temperature in the aging step is 40° C. or higher and 60° C. or lower.
  • the aging temperature is 40° C. or higher and 57° C. or lower.
  • the present invention can provide a thermoplastic resin film with good high-temperature resistance that can suppress residual air during compression without the need for an autoclave process under high-temperature and high-pressure conditions, a laminate including the thermoplastic resin film, and an optical laminate including the thermoplastic resin film or the laminate.
  • FIG. 1 is a diagram showing a layer structure of an optical laminate according to a first embodiment of the present invention.
  • FIG. 2 is a diagram showing a layer structure of an optical laminate according to a second embodiment of the present invention.
  • the thermoplastic resin film of the present invention has a single-layer structure or a multilayer structure, includes at least a thermoplastic resin layer (A) containing a thermoplastic resin, and when the thermoplastic resin film has a multilayer structure, at least one outermost layer is the thermoplastic resin layer (A).
  • the thermoplastic resin layer (A) has a thickness change of 80 ⁇ m or more when compressed in a compression creep test carried out under the following conditions, and the weight average molecular weight of the thermoplastic resin (a) in the thermoplastic resin layer (A) is 230,000 or more and 310,000 or less.
  • a test sample having a diameter of 8 mm and a thickness of 700 to 900 ⁇ m (for example, 800 ⁇ m) is prepared from the thermoplastic resin layer (A).
  • the test sample is compressed for 5 minutes under conditions of a load of 410 g and 30° C., and then the thickness (T1) of the test sample is measured.
  • the temperature is increased from 30° C. to 90° C. at a heating rate of 6° C./min.
  • the thickness (T2) of the test sample is measured.
  • the absolute value of the difference between the thickness (T1) and the thickness (T2) of the test sample is taken as the thickness change amount.
  • the test sample when the thickness of the thermoplastic resin layer (A) is less than 700 ⁇ m, the test sample may be prepared by stacking two or more thermoplastic resin layers, appropriately pressing them together by hot pressing or the like, adjusting the thickness to 700 to 900 ⁇ m by pressing or the like, and then cutting the resultant into a cylindrical shape with a diameter of 8 mm.
  • the test sample when the thickness of the thermoplastic resin layer (A) exceeds 900 ⁇ m, the test sample may be prepared by adjusting the thickness to 700 to 900 ⁇ m by hot pressing or the like as necessary, and then cutting the test sample into a cylindrical shape with a diameter of 8 mm.
  • thermoplastic resin layer (A) is removed by peeling it off from the other layers.
  • the test sample may be appropriately adjusted by hot pressing or the like so that the surface is flat, and then the test sample may be produced by cutting it into a cylindrical shape with a diameter of 8 mm.
  • the thickness change of the thermoplastic resin layer (A) is less than 80 ⁇ m, when an optical laminate is produced by pressing the thermoplastic resin film onto a transparent substrate or a functional layer in an autoclave at low temperature or by means other than an autoclave, air may remain between the thermoplastic resin film and the transparent substrate or the functional layer, which may result in poor transparency of the optical laminate.
  • air bubbles may form in the thermoplastic resin film, which may result in poor high-temperature heat resistance of the thermoplastic resin film.
  • the thickness change of the thermoplastic resin layer (A) is preferably 85 ⁇ m or more, more preferably 90 ⁇ m or more, even more preferably 100 ⁇ m or more, and even more preferably 110 ⁇ m or more.
  • the thickness change of the thermoplastic resin layer (A) is, for example, 450 ⁇ m or less, preferably 350 ⁇ m or less, more preferably 250 ⁇ m or less, and further preferably 150 ⁇ m or less.
  • the thickness change is kept at a certain value or less, the high temperature heat resistance of the thermoplastic resin film can be further improved.
  • the thickness change amount can be adjusted, for example, by the amount and type of plasticizer contained in the thermoplastic resin layer (A). For example, the thickness change amount tends to increase when the amount of plasticizer is increased. Furthermore, when an ether-based plasticizer such as a polyoxyalkylene ether-based plasticizer or a polyoxyalkylene ether-based plasticizer is used as the plasticizer, the thickness change amount tends to increase. In addition, when a polyvinyl acetal resin is used, the thickness change amount can also be adjusted by the production conditions when the polyvinyl acetal resin is produced. Specifically, as described below, the thickness change amount can be adjusted by the aging temperature in the aging step performed when the polyvinyl acetal resin is produced.
  • the weight average molecular weight (Mw) of the thermoplastic resin (a) in the thermoplastic resin layer (A) is 220,000 or more and 310,000 or less. If the weight average molecular weight (Mw) of the thermoplastic resin (a) is less than 220,000, bubbles may occur in the thermoplastic resin film when the thermoplastic resin film is used in a high temperature environment, and the high temperature heat resistance of the thermoplastic resin film may deteriorate. If the weight average molecular weight (Mw) of the thermoplastic resin (a) is greater than 310,000, the flexibility of the thermoplastic resin film may be insufficient, and it may be difficult to increase the thickness change amount during compression creep. From these viewpoints, the weight average molecular weight (Mw) of the thermoplastic resin (a) is more preferably 230,000 or more and 305,000 or less, and more preferably 240,000 or more and 300,000 or less.
  • the molecular weight distribution represented by the ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) in the thermoplastic resin (a) of the thermoplastic resin layer (A) is preferably 2.5 or less. If the molecular weight distribution (Mw/Mn) is 2.5 or less, the generation of bubbles due to use in a high temperature environment can be further suppressed, and the high temperature heat resistance of the thermoplastic resin film can be further improved. From this viewpoint, the molecular weight distribution (Mw/Mn) of the thermoplastic resin (a) is more preferably 2.3 or less, more preferably 2.2 or less, and even more preferably 2.0 or less. The molecular weight distribution (Mw/Mn) of the thermoplastic resin (a) is the lower the better, and it is sufficient if it is 1.0 or more, but in practical use, it may be 1.1 or more, or 1.3 or more.
  • the content of the resin having a weight average molecular weight (Mw) of 100,000 or less in the thermoplastic resin (a) in the thermoplastic resin layer (A) is preferably 25% by mass or less. If the content of the resin having a weight average molecular weight (Mw) of 100,000 or less is 25% by mass or less, the generation of bubbles due to use in a high temperature environment can be further suppressed, and the high temperature heat resistance of the thermoplastic resin film can be further improved. From this viewpoint, the content of the resin having a weight average molecular weight (Mw) of 100,000 or less is more preferably 22% by mass or less, more preferably 20% by mass or less, and even more preferably 17% by mass or less.
  • the content of the resin having a weight average molecular weight (Mw) of 100,000 or less is the less the better, and it is sufficient if it is 0% by mass or more, but practically it is sufficient if it is about 5% by mass or more.
  • the weight average molecular weight (Mw), molecular weight distribution (Mw/Mn) and the content of the resin having a weight average molecular weight (Mw) of 100,000 or less of the thermoplastic resin (a) can be appropriately adjusted depending on the manufacturing method of the thermoplastic resin (a) and the raw material used in the manufacture of the thermoplastic resin (a). For example, when the thermoplastic resin (a) is a polyvinyl acetal resin, it can be adjusted by appropriately selecting the raw material polyvinyl alcohol.
  • the content of the resin having a weight average molecular weight (Mw) of 100,000 or less in the thermoplastic resin (a) in the thermoplastic resin layer (A) can be reduced by adjusting the aging process carried out when preparing the thermoplastic resin (a).
  • the weight average molecular weight (Mw) and number average molecular weight (Mn) of the thermoplastic resin (a) in the thermoplastic resin layer (A) are measured by gel permeation chromatography.
  • the storage modulus of the thermoplastic resin layer (A) at 90° C. is preferably 2.0 ⁇ 10 5 Pa or more.
  • the storage modulus of the thermoplastic resin layer (A) is 2.0 ⁇ 10 5 Pa or more, the generation of bubbles due to use in a high-temperature environment can be further suppressed, and the high-temperature heat resistance of the thermoplastic resin film can be further improved.
  • the thermoplastic resin layer (A) has a storage modulus at 90° C. of more preferably 2.2 ⁇ 10 5 Pa or more, further preferably 2.5 ⁇ 10 5 Pa or more, and even more preferably 2.6 ⁇ 10 5 Pa or more.
  • the storage modulus is a shear storage modulus, and can be measured under the measurement conditions described in the examples below.
  • the complex viscosity of the thermoplastic resin layer (A) in the thermoplastic resin film of the present invention at 200 ° C. is preferably 4000 Pa ⁇ s or more.
  • the complex viscosity at 200 ° C. is 4000 Pa ⁇ s or more, it is possible to further suppress the generation of bubbles in the thermoplastic resin film when the thermoplastic resin film is used in a high temperature environment, and the high temperature heat resistance of the thermoplastic resin film can be further improved.
  • the complex viscosity at 200 ° C. is 2000 Pa ⁇ s or more, a certain tension is easily applied when the film is formed, the film formability is improved, and molding such as extrusion molding is easily performed.
  • the complex viscosity at 200 ° C. of the thermoplastic resin layer (A) in the thermoplastic resin film of the present invention is more preferably 5000 Pa ⁇ s or more, more preferably 5500 Pa ⁇ s or more, and even more preferably 5900 Pa ⁇ s or more.
  • the complex viscosity at 200°C of the thermoplastic resin layer (A) in the thermoplastic resin film of the present invention is preferably 30,000 Pa ⁇ s or less, more preferably 10,000 Pa ⁇ s or less, and even more preferably 8,000 Pa ⁇ s or less.
  • the method for measuring the complex viscosity is not particularly limited, but can be measured, for example, by the following method.
  • the thermoplastic resin film has a single-layer structure
  • the thermoplastic resin film is used as it is for measurement.
  • the thermoplastic resin film has a multilayer structure
  • the thermoplastic resin layer (A) is peeled off from the other layers to take out the thermoplastic resin layer (A).
  • 1 g of the thermoplastic resin layer (A) is placed in a mold (length 2 cm x width 2 cm x thickness 0.76 mm) arranged between two polyethylene terephthalate (PET) films, preheated at a temperature of 150 ° C.
  • PET polyethylene terephthalate
  • the press-molded thermoplastic resin layer (A) is placed in a hand press machine previously set to 20 ° C., and cooled by pressing at 10 MPa for 10 minutes.
  • one PET film is peeled off from the mold placed between the two PET films, and stored in a constant temperature and humidity room (humidity 30% ( ⁇ 3%), temperature 23°C) for 24 hours, and then the viscoelasticity is measured using ARES-G2 manufactured by TAINSTRUMENTS in accordance with JIS K7244-10 (ISO 6721-10), and the complex viscosity is measured.
  • a parallel plate with a diameter of 8 mm is used as a jig for measuring the viscoelasticity.
  • the viscoelasticity measurement is performed at a measurement temperature of 200°C, a frequency of 1 Hz, and a strain of 5%.
  • the obtained complex viscosity is read as the complex viscosity value of the thermoplastic resin layer (A) at 200°C.
  • the complex viscosity of the thermoplastic resin layer (A) can be reduced, for example, by reducing the molecular weight of the thermoplastic resin (a) or by increasing the content of the plasticizer contained in the thermoplastic resin layer (A).
  • Thermoplastic resin (a) used in the thermoplastic resin layer (A) of the present invention includes, for example, (meth)acrylic resins, polyvinyl acetal resins, polyvinyl alcohol resins (PVA), polyurethane resins (PU), ethylene-vinyl acetate copolymer resins (EVA), saponified ethylene-vinyl acetate copolymers (EVOH), ethylene-methacrylic acid copolymer resins, ionomer resins, isobutylene resins, styrene-isoprene copolymer resins, and styrene-butadiene copolymer resins.
  • the thermoplastic resins may be used alone or in combination of two or more.
  • the thermoplastic resin (a) is preferably a polyvinyl acetal resin, a polyurethane resin (PU), an ethylene-vinyl acetate copolymer resin (EVA), a saponified ethylene-vinyl acetate copolymer (EVOH), an ethylene-methacrylic acid copolymer resin, an ionomer resin, an isobutylene resin, a styrene-isoprene copolymer resin, or a styrene-butadiene copolymer resin.
  • the thermoplastic resin is more preferably a polyvinyl acetal resin.
  • thermoplastic resin (a) By using a polyvinyl acetal resin, it becomes easier to achieve excellent impact resistance. In addition, it becomes easier to achieve good adhesion to various resin materials and inorganic glass. Below, the polyvinyl acetal resin used in the thermoplastic resin (a) will be described in detail.
  • the polyvinyl acetal resin is not particularly limited as long as it is a polyvinyl acetal resin obtained by acetalizing polyvinyl alcohol (PVA) with an aldehyde.
  • PVA polyvinyl alcohol
  • the aldehyde is not particularly limited, but generally, an aldehyde having 1 to 10 carbon atoms is suitably used.
  • the aldehyde having 1 to 10 carbon atoms is not particularly limited, and examples thereof include n-butyl aldehyde, isobutyraldehyde, n-valeraldehyde, 2-ethylbutyraldehyde, n-hexyl aldehyde, n-octyl aldehyde, n-nonyl aldehyde, n-decyl aldehyde, formaldehyde, acetaldehyde, benzaldehyde, etc. These aldehydes may be used alone, or two or more of them may be used in combination.
  • the polyvinyl acetal resin is preferably a polyvinyl butyral resin.
  • Polyvinyl alcohol can be obtained, for example, by saponifying a polyvinyl ester such as polyvinyl acetate.
  • the degree of saponification of polyvinyl alcohol is generally 70 to 99.9 mol %.
  • the average polymerization degree of PVA is preferably 200 or more, more preferably 500 or more, even more preferably 750 or more, and even more preferably 1200 or more.
  • the average polymerization degree of PVA is preferably 5000 or less, more preferably 3500 or less, even more preferably 3000 or less, and even more preferably 2000 or less.
  • the average degree of polymerization of polyvinyl alcohol is determined by a method conforming to JIS K6726 "Testing method for polyvinyl alcohol".
  • the average degree of polymerization of polyvinyl alcohol can be estimated by calculation from the average degree of polymerization of each polyvinyl alcohol.
  • polyvinyl alcohol used as the raw material of the polyvinyl acetal resin two or more kinds of polyvinyl alcohols having different average polymerization degrees may be used. In this case, it is preferable to use a mixture of two or more kinds of polyvinyl alcohols as the raw material to produce the polyvinyl acetal resin by the production method described below.
  • two or more kinds of polyvinyl alcohols for example, it is preferable to use a first polyvinyl alcohol having an average degree of polymerization of 1500 or more and a second polyvinyl alcohol having an average degree of polymerization of 1200 or less.
  • the average degree of polymerization of the first polyvinyl alcohol is preferably 1500 or more and 3500 or less, more preferably 1600 or more and 2500 or less, and even more preferably 1600 or more and 2000 or less.
  • the average degree of polymerization of the second polyvinyl alcohol is preferably 200 or more and 1200 or less, more preferably 300 or more and 900 or less, and even more preferably 400 or more and 850 or less.
  • the blending ratio of the first polyvinyl alcohol to the second polyvinyl alcohol is not particularly limited, but the blending amount of the second polyvinyl alcohol relative to the total amount of the first and second polyvinyl alcohols is preferably 1 mass% or more and 50 mass% or less, more preferably 3 mass% or more and 40 mass% or less, even more preferably 5 mass% or more and 30 mass% or less, and still more preferably 10 mass% or more and 25 mass% or less.
  • the amount of hydroxyl groups in the polyvinyl acetal resin is preferably 15 mol% or more, and preferably 38 mol% or less.
  • the amount of hydroxyl groups 15 mol% or more the adhesiveness is easily improved, and when used in an optical laminate, the penetration resistance of the optical laminate is easily improved.
  • the amount of hydroxyl groups 38 mol% or less flexibility is easily ensured, and it is possible to prevent the optical laminate from becoming too hard or the thickness change amount from decreasing.
  • by adjusting the amount of hydroxyl groups within the above range it is possible to further suppress the generation of bubbles due to use in a high-temperature environment, and it is possible to further improve the high-temperature heat resistance of the thermoplastic resin film.
  • the amount of hydroxyl groups is more preferably 20 mol % or more, and even more preferably 25 mol % or more.
  • the amount of hydroxyl groups is more preferably 35 mol % or less, and even more preferably 33 mol % or less.
  • the amount of hydroxyl groups is 15 mol% or more, and preferably 38 mol% or less, more preferably 20 mol% or more, even more preferably 25 mol% or more, more preferably 35 mol% or less, and even more preferably 33 mol% or less.
  • the amount of hydroxyl groups in the polyvinyl acetal resin is a molar fraction calculated by dividing the amount of ethylene groups to which hydroxyl groups are bonded by the total amount of ethylene groups in the main chain, and expressed as a percentage.
  • the amount of ethylene groups to which the above-mentioned hydroxyl groups are bonded can be measured by the procedure described in the Examples.
  • the acetylation degree of the polyvinyl acetal resin is preferably 30 mol% or less, more preferably 20 mol% or less, even more preferably 10 mol% or less, and even more preferably 2 mol% or less. When the acetylation degree is equal to or less than the upper limit, the moisture resistance of the polymer film is increased.
  • the acetylation degree is not particularly limited, but is preferably 0.01 mol% or more, and more preferably 0.1 mol% or more.
  • the degree of acetylation is a molar fraction calculated by dividing the amount of ethylene groups to which acetyl groups are bonded by the total amount of ethylene groups in the main chain, and expressed as a percentage. The amount of ethylene groups bonded to the above acetyl groups can be measured by the procedure described in the Examples.
  • the degree of acetalization of the polyvinyl acetal resin is preferably 47 mol% or more and preferably 85 mol% or less, more preferably 55 mol% or more, further preferably 60 mol% or more, and more preferably 80 mol% or less, further preferably 75 mol% or less.
  • the degree of acetalization means the degree of butyralization when the acetal group is a butyral group and the polyvinyl acetal resin (A) is a polyvinyl butyral resin.
  • the above-mentioned degree of acetalization is a molar fraction calculated by subtracting the amount of ethylene groups bonded to hydroxyl groups and the amount of ethylene groups bonded to acetyl groups from the total amount of ethylene groups in the main chain, and dividing the result by the total amount of ethylene groups in the main chain, expressed as a percentage.
  • the degree of acetalization (degree of butyralization) may be calculated based on the amount of ethylene groups bonded to hydroxyl groups and the amount of ethylene groups bonded to acetyl groups, which are calculated by the procedure described in the Examples.
  • the polyvinyl acetal resin is preferably an unmodified polyvinyl acetal resin, but may also be a modified polyvinyl acetal resin.
  • the modified polyvinyl acetal resin has a structure (modifying group) other than an acetal group, a hydroxyl group, and an acetyl group, and preferably has a modifying group in a side chain.
  • the modifying group include those having a polyalkylene oxide structure in a side chain, and those having an acetal group, an alkyl group other than an acetyl group (e.g., having about 2 to 30 carbon atoms) in a side chain.
  • the modification amount is not particularly limited, but is, for example, about 0.1 mol % to 10 mol %.
  • the modification amount indicates the ratio of functional groups to all vinyl monomer units constituting the polyvinyl acetal resin.
  • the polyvinyl acetal resin may be used alone or in combination of two or more kinds.
  • the thermoplastic resin layer (A) may contain a thermoplastic resin other than the polyvinyl acetal resin as long as the effects of the present invention are achieved.
  • the thermoplastic resin other than the polyvinyl acetal resin is as described above.
  • the thermoplastic resin layer (A) is mainly composed of polyvinyl acetal resin.
  • the content of polyvinyl acetal resin is, for example, 50 mass% or more, preferably 70 mass% or more, more preferably 90 mass% or more, and most preferably 100 mass% based on the total amount of thermoplastic resin (a) contained in the thermoplastic resin layer (A). Therefore, the thermoplastic resin (a) contained in the thermoplastic resin layer (A) of the present invention may be composed only of polyvinyl acetal resin.
  • the polyvinyl acetal resin is preferably produced by a production method including a mixing step of mixing the polyvinyl alcohol and the aldehyde, and an aging step of aging the mixture obtained in the mixing step.
  • polyvinyl alcohol and aldehyde may be mixed according to the usual method.
  • a catalyst such as an acid catalyst may be added to promote the acetalization reaction.
  • aldehyde may be added under low temperature conditions of about 0 to 40°C to a mixture of polyvinyl alcohol and an acid catalyst.
  • two or more types of polyvinyl alcohol may be mixed with the aldehyde.
  • the aging step is not particularly limited, but may be, for example, a catalyst such as an acid catalyst added to the mixture (reaction mixture) obtained by the mixing step, heated to an aging temperature, and maintained at the aging temperature for a certain period of time.
  • a catalyst such as an acid catalyst added to the mixture (reaction mixture) obtained by the mixing step, heated to an aging temperature, and maintained at the aging temperature for a certain period of time.
  • acetalization of polyvinyl alcohol proceeds in the mixing step and the aging step to obtain a polyvinyl acetal resin.
  • the reaction mixture may be maintained at the aging temperature for a certain period of time, and then appropriately cooled and neutralized, and then washed with water and dried, if necessary.
  • Examples of the acid catalyst added in the mixing step and the aging step include inorganic acids such as hydrochloric acid, nitric acid, phosphoric acid, boric acid, sulfuric acid, etc.
  • the concentration of the acid catalyst may be adjusted to, for example, about 0.5% by mass or more and 5% by mass or less, preferably about 1% by mass or more and 2.5% by mass or less.
  • the aging temperature in the aging step may be relatively low, for example, from 40° C. to 60° C., preferably from 35° C. to 60° C., and more preferably from 40° C. to 57° C.
  • the time for which the aging temperature is maintained (aging time) may be longer than a certain time, for example, from 75 minutes to 180 minutes, preferably from 90 minutes to 150 minutes, and more preferably from 100 minutes to 140 minutes.
  • the aging temperature and aging time are within the desired ranges described above, it is presumed that the hydroxyl groups in the polyvinyl acetal resin tend to be distributed uniformly throughout the molecules, which in turn reduces the amount of low molecular weight components and narrows the molecular weight distribution. As a result, the amount of thickness change can be increased without significantly decreasing the storage modulus at 90°C. In addition, the amount of low molecular weight components decreases, making it easier for the molecular weight distribution to become narrower. The reason for the reduction in low molecular weight components is unclear, but it is presumed to be due to the promotion of intermolecular crosslinking.
  • thermoplastic resin layer (A) preferably contains a plasticizer.
  • the thermoplastic resin layer (A) becomes flexible by containing a plasticizer, and the adhesiveness of the thermoplastic resin layer (A) to various adherends and the penetration resistance can be improved. In addition, the thickness change amount can be easily increased.
  • plasticizer examples include organic ester plasticizers, organic phosphorus-based plasticizers such as organic phosphate ester plasticizers and organic phosphite ester plasticizers, organic ether-based plasticizers such as polyalkylene glycol-based plasticizers, and alcohol-based plasticizers.
  • the plasticizers may be used alone or in combination of two or more. Among the above, organic ester plasticizers and organic ether plasticizers are preferred.
  • Preferred organic ester plasticizers include monobasic organic acid esters and polybasic organic acid esters.
  • monobasic organic acid esters include esters of glycols and monobasic organic acids.
  • glycols include polyalkylene glycols in which each alkylene unit has 2 to 4 carbon atoms, preferably 2 or 3 carbon atoms, and the number of repeating alkylene units is 2 to 10, preferably 2 to 4.
  • glycols may also include monoalkylene glycols having 2 to 4 carbon atoms, preferably 2 or 3 carbon atoms (i.e., one repeating unit).
  • glycol examples include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol, and butylene glycol.
  • monobasic organic acid examples include organic acids having 3 to 10 carbon atoms, and specific examples thereof include butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptyl acid, n-octylic acid, 2-ethylhexyl acid, n-nonyl acid, and decylic acid.
  • Specific monobasic organic acids include triethylene glycol di-2-ethylbutyrate, triethylene glycol di-2-ethylhexanoate, triethylene glycol dicaprylate, triethylene glycol di-n-octanoate, triethylene glycol di-n-heptanoate, tetraethylene glycol di-n-heptanoate, tetraethylene glycol di-2-ethylhexanoate, diethylene glycol di-2-ethylbutyrate, diethylene glycol di-2-ethylhexanoate, dipropylene glycol di-2-ethylbutyrate, and triethylene glycol di-n-octanoate.
  • Examples include diethylene glycol di-2-ethylpentanoate, tetraethylene glycol di-2-ethylbutyrate, diethylene glycol dicapryate, triethylene glycol di-n-heptanoate, tetraethylene glycol di-n-heptanoate, triethylene glycol di-2-ethylbutyrate, ethylene glycol di-2-ethylbutyrate, 1,2-propylene glycol di-2-ethylbutyrate, 1,3-propylene glycol di-2-ethylbutyrate, 1,4-butylene glycol di-2-ethylbutyrate, and 1,2-butylene glycol di-2-ethylbutyrate.
  • polybasic organic acid esters examples include ester compounds of dibasic organic acids having 4 to 12 carbon atoms, such as adipic acid, sebacic acid, and azelaic acid, with alcohols having 4 to 10 carbon atoms.
  • the alcohols having 4 to 10 carbon atoms may be linear, may have a branched structure, or may have a cyclic structure.
  • adipate examples include dibutyl sebacate, dioctyl azelaate, dihexyl adipate, dioctyl adipate, hexylcyclohexyl adipate, diisononyl adipate, heptylnonyl adipate, dibutyl carbitol adipate, and mixed adipates.
  • Oil-modified alkyd sebacate may also be used.
  • the mixed adipate include adipates made from two or more alcohols selected from alkyl alcohols having 4 to 9 carbon atoms and cyclic alcohols having 4 to 9 carbon atoms.
  • the organic ester plasticizer is not limited to the complete esters of the above-mentioned esters, and may be a partial ester.
  • it may be a partial ester of glycol and a monobasic organic acid, or a partial ester of a dibasic organic acid and an alcohol.
  • a specific example is triethylene glycol-mono-2-ethylhexanoate.
  • it may be a partial ester of a monobasic organic acid with a trihydric or higher alcohol such as glycerin.
  • the monobasic organic acid include monobasic organic acids having 3 to 24 carbon atoms, preferably 6 to 18 carbon atoms.
  • partial ester of a monobasic organic acid with a trihydric or higher alcohol examples include a mono- or diester of glycerin and stearic acid, and a mono- or diester of glycerin and 2-ethylhexyl acid.
  • organic ester plasticizers triethylene glycol-di-2-ethylhexanoate (3GO) is particularly preferably used.
  • Organophosphorus plasticizers include phosphate esters such as tributoxyethyl phosphate, isodecylphenyl phosphate, and triisopropyl phosphate.
  • the polyalkylene glycol plasticizer may be a polyoxyalkylene compound having a polyoxyalkylene structure, specifically, a polyhydric alcohol compound such as glycol, an ester compound of glycol and a monobasic organic acid or a polybasic organic acid, an ether compound of a monohydric or polyhydric alcohol and a polyoxyalkylene, etc.
  • the glycol may be polyoxyalkylene glycol or a derivative thereof.
  • the polyoxyalkylene may be polyoxyethylene, polyoxypropylene, polyoxybutylene, or a random copolymer or block copolymer thereof, etc.
  • the polyoxyalkylene compound may be a polyhydric alcohol compound, an ester compound, an ether compound, or other compounds, as described above.
  • polyoxyalkylene compounds include polyoxyalkylene or its derivatives. More specifically, examples include polyoxyalkylene glycols composed of the above-mentioned polyoxyalkylenes, and ether compounds of polyoxyalkylenes and polyhydric alcohols. All of these may have hydroxyl groups at their terminals, but they may also be derivatives in which some or all of the terminal hydroxyl groups have hydrogen atoms substituted with alkyl groups or acyl groups.
  • the number of carbon atoms in the alkyl and acyl groups is not particularly limited, but may be about 1 to 8, and is preferably 1 to 4.
  • polyoxyalkylene glycols examples include polyoxyethylene polyoxypropylene glycols such as polyethylene glycol (polyoxyethylene glycol), polypropylene glycol (polyoxypropylene glycol), poly(ethylene oxide/propylene oxide) block copolymers and poly(ethylene oxide/propylene oxide) random copolymers, and polyoxybutylene glycols such as polytetramethylene glycol.
  • ether compound of polyoxyalkylene and polyhydric alcohol examples include ether compounds of polyhydric alcohol such as glycerol, diglycerol, trimethylolpropane, erythritol, pentaerythritol, bisphenol A, and polyoxyalkylene, specifically, polyoxyethylene glyceryl ether, polyoxypropylene glyceryl ether, polyoxyethylene diglyceryl ether, polyoxypropylene diglyceryl ether, polyoxyalkylene pentaerythritol ether, etc.
  • polyhydric alcohol such as glycerol, diglycerol, trimethylolpropane, erythritol, pentaerythritol, bisphenol A
  • polyoxyalkylene specifically, polyoxyethylene glyceryl ether, polyoxypropylene glyceryl ether, polyoxyethylene diglyceryl ether, polyoxypropylene diglyceryl ether, polyoxyalkylene pentaeryth
  • Examples of the derivative in which some or all of the hydrogen atoms of the terminal hydroxyl groups are substituted with alkyl groups or acyl groups include the above-mentioned polyoxyalkylene glycols and derivatives in which some or all of the hydrogen atoms of the terminal hydroxyl groups of the ether compounds are substituted with alkyl groups or acyl groups.
  • polyoxyethylene glycol monomethyl ether examples include polyoxyethylene glycol monomethyl ether, polyoxyethylene glycol dimethyl ether, polyoxypropylene glycol monomethyl ether, polyoxypropylene glycol dimethyl ether, polyoxyethylene polyoxypropylene glycol monomethyl ether, polyoxyethylene polyoxypropylene glycol dimethyl ether, polyoxyethylene glycol monobutyl ether, polyoxypropylene glycol monobutyl ether, and polyoxyethylene polyoxypropylene monobutyl ether.
  • the polyoxyalkylene compound is preferably one having a polyoxyethylene, polyoxypropylene, or polyoxyethylene polyoxypropylene structure, and more preferably one having a polyoxypropylene or polyoxyethylene polyoxypropylene structure.
  • polyoxyethylene polyoxypropylene glycol, polyoxypropylene glyceryl ether, polyoxypropylene diglyceryl ether, or derivatives thereof in which some of the hydrogen atoms of the terminal hydroxyl groups are substituted with alkyl groups are preferred.
  • the alcohol-based plasticizer include various polyhydric alcohols such as butanediol, hexanediol, trimethylolpropane, pentaerythritol, etc. Among these, trimethylolpropane is preferred.
  • the above plasticizers can be used alone or in combination of two or more.
  • triethylene glycol-di-2-ethylhexanoate (3GO) polyoxyethylene polyoxypropylene glycol, polyoxypropylene glyceryl ether, polyoxypropylene diglyceryl ether, or derivatives in which some of the hydrogen atoms of the terminal hydroxyl groups are substituted with alkyl groups are preferred, with triethylene glycol-di-2-ethylhexanoate (3GO) being more preferred.
  • the content of the plasticizer in the thermoplastic resin layer (A) is not particularly limited, but is preferably 10 parts by mass or more and 100 parts by mass or less with respect to 100 parts by mass of the thermoplastic resin (a).
  • the content of the plasticizer is 10 parts by mass or more, the thermoplastic resin layer (A) becomes moderately flexible, and the adhesiveness of the thermoplastic resin layer (A) and the penetration resistance of the optical laminate become good. Furthermore, the thickness change amount is also easily increased.
  • the content of the plasticizer is 100 parts by mass or less, separation of the plasticizer from the thermoplastic resin layer (A) can be prevented, and excessive thickness change can also be prevented.
  • the above content of the plasticizer is more preferably 15 parts by mass or more, even more preferably 30 parts by mass or more, even more preferably 35 parts by mass or more, and more preferably 70 parts by mass or less, even more preferably 60 parts by mass or less, and even more preferably 50 parts by mass or less.
  • the content of the plasticizer in the thermoplastic resin layer (A) is preferably 30 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the polyvinyl acetal resin.
  • the content of the plasticizer is 30 parts by mass or more, the thermoplastic resin layer (A) becomes moderately flexible, and the adhesiveness of the thermoplastic resin layer (A) and the penetration resistance of the optical laminate become good. Furthermore, the thickness change amount is also easily increased.
  • the content of the plasticizer is 50 parts by mass or less, separation of the plasticizer from the thermoplastic resin layer (A) can be prevented, and excessive thickness change can also be prevented.
  • the content of the plasticizer is more preferably 35 parts by mass or more, and more preferably 45 parts by mass or less, and further preferably 40 parts by mass or less.
  • the thermoplastic resin layer (A) may appropriately contain known additives used in combination with the thermoplastic resin (a) in addition to the plasticizer. That is, the thermoplastic resin layer (A) may be composed of a thermoplastic resin (a) such as a polyvinyl acetal resin, or a thermoplastic resin (a) and a plasticizer, but may also contain additives other than the plasticizer that are blended as necessary. Specific examples of the additives other than the plasticizer include ultraviolet absorbers, infrared absorbers, antioxidants, light stabilizers, adhesion regulators, colorants (pigments or dyes), fluorescent brighteners, and crystal nucleating agents.
  • the thermoplastic resin layer (A) may or may not contain a colorant. By using the colorant, the laminated glass can be well colored to a desired color tone. The colorant may be used alone or in combination of two or more.
  • the thermoplastic resin layer (A) may contain only one type of colorant, two or more types, three or more types, 10 or less types, or 5 or less types.
  • the colorants include pigments and dyes.
  • the colorants may be pigments, dyes, or both pigments and dyes. There are also colorants that are classified as both pigments and dyes.
  • the colorant may contain a pigment or may be a pigment.
  • the thermoplastic resin layer (A) may contain a pigment or may not contain a pigment.
  • the pigment may be used alone or in combination of two or more.
  • the thermoplastic resin layer (A) may contain only one type of pigment, two or more types, three or more types, 10 or less types, or 5 or less types.
  • the above pigments include perylene compounds, threne compounds, quinacridone compounds, diketopyrrolopyrrole compounds, anthraquinone compounds, perinone compounds, phthalocyanine compounds, indanthrene compounds, indigo compounds, isoindolinone compounds, nickel complex compounds, methine compounds, azomethine compounds, dioxazines, azo compounds, and carbon black.
  • the content of the pigment in 100% by mass of the thermoplastic resin layer (A) is preferably 0.0001% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.02% by mass or more, preferably 0.15% by mass or less, and more preferably 0.12% by mass or less.
  • the content of the pigment is equal to or more than the lower limit and equal to or less than the upper limit, the effects of the present invention can be exhibited even more effectively.
  • the colorant may contain a dye or may be a dye.
  • the thermoplastic resin layer (A) may contain a dye or may not contain a dye. The dye may be used alone or in combination of two or more.
  • the thermoplastic resin layer (A) may contain only one dye, two or more dyes, three or more dyes, 10 or less dyes, or 5 or less dyes.
  • the above dyes include perylene compounds, threne compounds, quinacridone compounds, diketopyrrolopyrrole compounds, anthraquinone compounds, perinone compounds, phthalocyanine compounds, indanthrene compounds, indigo compounds, isoindolinone compounds, nickel complex compounds, methine compounds, azomethine compounds, dioxazines, and azo compounds.
  • the content of the dye in 100% by mass of the thermoplastic resin layer (A) is preferably 0.00001% by mass or more, more preferably 0.0001% by mass or more, even more preferably 0.001% by mass or more, preferably less than 0.015% by mass, and more preferably 0.01% by mass or less.
  • the content of the dye is equal to or more than the lower limit and equal to or less than the upper limit (or less than the upper limit), the effects of the present invention can be exhibited even more effectively.
  • the content of the colorant in 100% by mass of the thermoplastic resin layer (A) is preferably 0.00001% by mass or more, more preferably 0.0001% by mass or more, even more preferably 0.001% by mass or more, preferably 0.15% by mass or less, and more preferably 0.12% by mass or less.
  • the content of the colorant is equal to or more than the lower limit and equal to or less than the upper limit (or less than the upper limit), the effects of the present invention can be exhibited even more effectively.
  • the thickness of the thermoplastic resin layer (A) is not particularly limited, but is, for example, 100 ⁇ m to 2000 ⁇ m, preferably 200 ⁇ m to 1300 ⁇ m, and more preferably 300 ⁇ m to 1000 ⁇ m.
  • the thickness of the thermoplastic resin layer (A) is equal to or greater than the lower limit, impact resistance can be increased and adhesion to a transparent substrate and the like can be easily ensured.
  • the thickness is equal to or less than the upper limit, the thickness of the optical laminate can be prevented from becoming unnecessarily thick.
  • the thermoplastic resin film of the present invention has a single layer structure or a multilayer structure.
  • some of the layers may be thermoplastic resin layers (A), or all of the layers may be thermoplastic resin layers (A).
  • thermoplastic resin film has a multilayer structure, it is sufficient that either one of the outermost layers is a thermoplastic resin layer (A), but it is preferable that both outermost layers are thermoplastic resin layers (A).
  • both outer layers be thermoplastic resin layers (A)
  • the thermoplastic resin film is preferably made of a single layer of the above-mentioned thermoplastic resin layer (A).
  • thermoplastic resin film has a two-layer structure
  • either one of the layers may be the thermoplastic resin layer (A), but it is preferable that both layers are the thermoplastic resin layers (A).
  • thermoplastic resin film has a three-layer structure having two outermost layers and a middle layer, it is sufficient that either one of the two outermost layers is a thermoplastic resin layer (A), but it is preferable that both outermost layers are thermoplastic resin layers (A).
  • the middle layer may be composed of a thermoplastic resin layer (A) or may be composed of a layer other than the thermoplastic resin layer (A).
  • the thermoplastic resin film may have two outermost layers and two or more middle layers, and may have a structure of four or more layers.
  • thermoplastic resin layer (A) it is sufficient that either one of the two outermost layers is a thermoplastic resin layer (A), but it is preferable that both are thermoplastic resin layers (A).
  • Each middle layer may be composed of a thermoplastic resin layer (A), but may also be composed of a layer other than the thermoplastic resin layer (A).
  • the thermoplastic resin layers (A) may have the same structure or different structures.
  • the types and contents of the thermoplastic resins constituting the layers may be the same or different from each other.
  • thermoplastic resin film has a layer other than the thermoplastic resin layer (A)
  • a layer may be a thermoplastic resin layer other than the thermoplastic resin layer (A).
  • the type of thermoplastic resin used for the thermoplastic resin layer other than the thermoplastic resin layer (A) is not particularly limited, but may be appropriately selected from those listed as the thermoplastic resin (a) that can be used for the thermoplastic resin layer (A) above, and the types of resins that can be suitably used are also the same, and therefore it is particularly preferable to use a polyvinyl acetal resin.
  • the thickness of the thermoplastic resin layer (A) is not particularly limited, but it is preferable that it occupies a certain percentage or more of the total thickness of the thermoplastic resin film.
  • the thickness of the thermoplastic resin layer (A) may be, for example, a percentage of 0.1 to 1 relative to the total thickness of the thermoplastic resin film, and is preferably 0.3 to 1, more preferably 0.5 to 1, and even more preferably 0.75 to 1.
  • the thickness of the thermoplastic resin layer (A) here refers to the total thickness of the thermoplastic resin layer (A) when there are two or more layers.
  • each thermoplastic resin layer (A) is not particularly limited, but is, for example, 50 ⁇ m to 1500 ⁇ m, preferably 100 ⁇ m to 1000 ⁇ m, and more preferably 200 ⁇ m to 900 ⁇ m.
  • the thermoplastic resin layer (A) has a certain thickness or more, it becomes easier to suppress air remaining during compression.
  • the thickness below a certain thickness it is possible to prevent the thermoplastic resin film from becoming thicker than necessary.
  • the method for producing the thermoplastic resin film is not particularly limited, and the film may be produced by a conventionally known method such as extrusion molding or press molding, with extrusion molding being preferred.
  • the thermoplastic resin film may have an uneven shape on one or both surfaces.
  • the method for forming the uneven shape is not particularly limited, and examples thereof include a lip embossing method, an embossing roll method, and a calendar roll method.
  • the laminate of the present invention includes the thermoplastic resin film of the present invention and a functional layer different from the thermoplastic resin film of the present invention.
  • the laminate of the present invention uses a thermoplastic resin film having a thermoplastic resin layer (A), so that when the functional layer is incorporated into an optical laminate or the like, it is not necessary to use an autoclave process under high temperature and high pressure conditions, and therefore it is possible to suppress the inactivation of the functional layer.
  • the functional layer is preferably disposed between a pair of thermoplastic resin films of the present invention.
  • the functional layer may be disposed between the thermoplastic resin film of the present invention and a thermoplastic resin film other than the thermoplastic resin film of the present invention described above.
  • the layer structure of the laminate is not limited to a structure in which the functional layer is disposed between a pair of thermoplastic resin films, and can take various forms as described below.
  • the functional layer used in the laminate of the present invention is not particularly limited as long as it is a layer having a predetermined function.
  • a functional film can be used as the functional layer used in the laminate of the present invention.
  • the functional film may be a light control film, a display element film, or an optical film such as a polarizing film, a retardation film, or an anti-reflection film.
  • a solar cell element can be used as the functional layer.
  • the functional film is preferably a film having electronic components such as a light control film or a display element film.
  • Films having electronic components tend to deteriorate or lose their functions when integrated in an autoclave under high temperature and high pressure conditions, but according to the present invention, since there is no need to press a thermoplastic resin film onto a functional layer in an autoclave process under high temperature and high pressure conditions, a functional layer such as an optical laminate can be incorporated without losing the function layer. Therefore, even a film having electronic components can be incorporated into a laminate for practical use.
  • window glass with high added value can be provided, so in the present invention, it is desirable to use any one of these functional films as the functional layer.
  • the light control film is a film-like member having a light control element.
  • the light control element is preferably a light control film having two resin films and a light control layer disposed between the two resin films. Therefore, the adhesive surface of the light control film with the thermoplastic resin layer becomes a resin material, and the adhesive strength with respect to the thermoplastic resin layer (A) tends to be high.
  • the resin film used for the light control element is not particularly limited, but examples thereof include polyester resin films such as PET film and PEN film, (meth)acrylic resin film, TAC film, PES resin film, and polyimide resin film. Among these, polyester resin film is preferred from the viewpoint of handling, and PET film is more preferred.
  • a conductive layer constituting an electrode is provided on the surface of each of the two resin films facing the light control layer.
  • the light-controlling layer changes its visible light transmittance by switching between application and non-application of a voltage between the conductive layers of two resin films.
  • the light-controlling layer is composed of a liquid crystal layer such as a polymer dispersed liquid crystal (PDLC), and the light-controlling film may be a PDLC film.
  • the light-controlling film may also be an SPD (Suspended Particle Device) film, an electrochromic film, an electrophoretic film device, or the like.
  • the light-controlling layer may be an SPD layer containing a resin matrix and a light-controlling suspension dispersed in the resin matrix, or may be an electrochromic material layer. It may also be an electrophoretic layer containing electrophoretic particles and a dispersant for dispersing the electrophoretic particles.
  • the display element film is a film-like member having a display element.
  • the display element film include those having a resin film and a display element mounted on the resin film.
  • the display element film may be a pair of resin films with a display element provided therebetween. With such a configuration, when the display element film is disposed between a pair of thermoplastic resin films and incorporated into an optical laminate, it can be adhered to the thermoplastic resin films with high adhesiveness.
  • the resin film used for the display element film can be appropriately selected from the resin films listed in the light control film.
  • a conductive layer constituting an electrode may be provided on the surface of the resin film facing the display element.
  • the display element include an organic EL element, an LED display, and a segment display. Among these, an organic EL element is preferred.
  • the functional film having electronic components is not limited to the above-mentioned display element film and light control film, but may be other functional films.
  • the electronic components may be mounted on the resin film in the same manner as the display element film and light control film, but it is preferable that the electronic components are disposed between a pair of resin films.
  • the solar cell element is not particularly limited as long as it is a solar cell element used in a building-integrated power generation system (BIPV), and examples of the solar cell element include crystalline or thin-film silicon-type solar cell elements; compound semiconductor solar cell elements such as CIS, CIGS, CdTe, and GaAs; and organic solar cell elements such as dye-sensitized, organic thin film, and perovskite.
  • the laminate can be manufactured by, for example, thermocompression bonding the functional layer and the thermoplastic resin film.
  • the thermocompression bonding may be performed in advance by thermocompression bonding the functional layer and the thermoplastic resin film to form a laminate, and then the laminate may be compressed to a transparent substrate to form an optical laminate.
  • the functional layer before compression and the thermoplastic resin film may be placed between the transparent substrate, and in the process of compressing the transparent substrate and the thermoplastic resin film, the functional layer and the intermediate film may also be compressed together.
  • optical laminate of the present invention comprises a first transparent substrate, a second transparent substrate, and the thermoplastic resin film of the present invention or the laminate of the present invention disposed between the first and second transparent substrates.
  • the first and second transparent substrates used in the optical laminate of the present invention may be, for example, glass plates.
  • the glass plates may be either inorganic glass or organic glass, but inorganic glass is preferred.
  • the inorganic glass is not particularly limited, but may be clear glass, float glass, tempered glass, colored glass, polished glass, patterned glass, wired glass, lined glass, ultraviolet absorbing glass, infrared reflecting glass, infrared absorbing glass, green glass, etc.
  • organic glass what is generally called resin glass is used, and examples thereof include various organic glass plates such as polycarbonate plate, (meth)acrylic plate such as polymethyl methacrylate plate, polyester plate such as acrylonitrile styrene copolymer plate, acrylonitrile butadiene styrene copolymer plate, polyethylene terephthalate plate, fluorine-based resin plate, polyvinyl chloride plate, chlorinated polyvinyl chloride plate, polypropylene plate, polystyrene plate, polysulfone plate, epoxy resin plate, phenol resin plate, unsaturated polyester resin plate, polyimide resin plate, etc.
  • the organic resin plate may be appropriately subjected to a surface treatment or the like.
  • the first and second transparent substrates may be made of the same material or different materials, for example, one may be inorganic glass and the other organic glass, but it is preferable that both the first and second transparent substrates are inorganic glass or organic glass.
  • the thickness of each of the glass plates used as the first and second transparent substrates is not particularly limited, but is, for example, about 0.1 to 15 mm, preferably 0.5 to 5 mm.
  • the thicknesses of the glass plates may be the same or different from each other.
  • the transparent substrate may be a glass plate alone, or may be a glass plate to which other members are attached.
  • the transparent substrate may be a glass plate to which functional members are attached, so that various functions are imparted.
  • the other member may be, for example, a member constituting an electronic device, an optical member, or the like, but is preferably a member constituting a display device.
  • the display device may be a liquid crystal display device, an organic EL display device, an LED display device, a segment display device, or the like. Of these, the display device is preferably a liquid crystal display device.
  • the display device may be, for example, a display panel having a glass plate as a substrate on which a display layer such as a liquid crystal layer or an organic EL layer, and light-emitting elements are provided, and the glass plate that serves as the substrate of the display panel may be used as a transparent base material.
  • functional layers such as a conductive layer, an antireflection layer, and a hard coat layer that constitute a functional film, an electrode, a sensor, etc., described below, may be laminated on the glass plate, and the transparent substrate may be a glass plate on which such functional films or functional layers are laminated. Therefore, the surface to be bonded to the thermoplastic resin film, on which the thermoplastic resin film is directly laminated, may be the glass plate itself, or it may be the surface of a functional film or a functional layer.
  • thermoplastic resin films When two or more thermoplastic resin films are provided in the laminate, as described above, it is preferable that all of the thermoplastic resin films are the thermoplastic resin films of the present invention, but some of the thermoplastic resin films may be other than the thermoplastic resin films of the present invention. In addition, another layer such as an adhesive layer may be provided between the functional layer and the thermoplastic resin film as appropriate.
  • the optical laminate is an optical laminate 1A in which one thermoplastic resin film (thermoplastic resin layer (A)) 10 is provided between first and second transparent substrates 20 and 30.
  • thermoplastic resin layer (A) thermoplastic resin layer 10
  • the thermoplastic resin film 10 is adhered to both the first and second transparent substrates 20 and 30 to join them.
  • At least one of the first and second transparent substrates 20, 30 may have other components attached thereto, as described above. Specifically, it may have a functional component constituting an electronic device such as a display device, an optical component, or the like attached thereto, or it may have the above-mentioned functional film, functional layer, or the like laminated thereon. In particular, it is preferable that a member constituting a display device, particularly a liquid crystal display device, is attached to at least one of the first and second transparent base materials 20, 30.
  • At least one of the first and second transparent base materials 20, 30 is a glass plate constituting a display device, and it is preferable that the optical laminate 1A is provided with a display device having at least one of the first and second transparent base materials 20, 30 as a substrate.
  • thermoplastic resin layer (A) a material containing the above-mentioned thermoplastic resin layer (A) as the thermoplastic resin film 10
  • thermoplastic resin film 10 even if the first and second transparent substrates 20, 30 and the thermoplastic resin film 10 are integrated without going through an autoclave process under high temperature and high pressure conditions, it is possible to suppress poor appearance due to residual air during compression or foaming caused by use in a high temperature and high pressure environment.
  • a functional member is provided on either one of the first and second transparent substrates 20, 30, they can be integrated by compression without going through an autoclave process under high temperature and high pressure conditions, so that the functional member attached to the optical laminate 1A can be prevented from deteriorating or becoming inactive.
  • the optical laminate may have a thermoplastic resin film consisting of multiple thermoplastic resin layers between the first and second transparent substrates.
  • each thermoplastic resin layer may be the thermoplastic resin film of the present invention having the thermoplastic resin layer (A) described above.
  • multiple thermoplastic resin layers are provided, by making all of the thermoplastic resin layers the thermoplastic resin layer (A) described above, it is possible to suppress poor appearance due to residual air during compression or foaming caused by use in a high-temperature, high-pressure environment, even if the first and second transparent substrates and the thermoplastic resin films are integrated without going through an autoclave process under high-temperature, high-pressure conditions.
  • FIG. 2 An embodiment of the optical laminate in the case where a plurality of thermoplastic resin layers are provided is shown in FIG. 2 as a second embodiment.
  • the optical laminate 1B according to the second embodiment has a pair of thermoplastic resin films 10 provided between the first and second transparent substrates 20 and 30, and a functional layer 40 is further provided between the pair of thermoplastic resin films 10. That is, in the optical laminate 1B according to the second embodiment, a laminate 50 in which a functional layer 40 is provided between a pair of thermoplastic resin layers 10 is provided between the first and second transparent substrates 20 and 30.
  • the pair of thermoplastic resin films 10 are both the above-mentioned thermoplastic resin layers (A).
  • thermoplastic resin film 10 is adhered to both the first transparent substrate 20 and the functional layer 40, joining them, while the other thermoplastic resin layer 10 is adhered to both the second transparent substrate 30 and the functional layer 40, joining them.
  • thermoplastic resin film 10 which is the thermoplastic resin layer (A).
  • the optical laminate 1B may be integrated through an autoclave process under high temperature and high pressure conditions, but even without an autoclave process under high temperature and high pressure conditions, the use of a thermoplastic resin film 10 having a thermoplastic resin layer (A) can prevent poor appearance due to residual air during compression or foaming caused by use in a high temperature and high pressure environment. Furthermore, by integrating the optical laminate 1B at a low temperature, deterioration or deactivation of the functional layer 40 can be prevented.
  • thermoplastic resin films 10 and one functional layer 40 are provided in the laminate, but three or more thermoplastic resin films and two or more functional layers may be provided in the laminate.
  • the thermoplastic resin films and the functional layers may be arranged alternately in the first and second optical laminates.
  • the thermoplastic resin films may be arranged in the positions closest to the first and second transparent substrates.
  • the order may be first transparent substrate/thermoplastic resin film/functional layer/thermoplastic resin film/functional layer/thermoplastic resin film/second transparent substrate.
  • thermoplastic resin layer (A) may be used as each of the thermoplastic resin films.
  • the configuration of each thermoplastic resin film may be the same or different.
  • the optical laminate of the present invention may be produced by a production method in which at least a thermoplastic resin film or a laminate is placed between a first transparent substrate and a second transparent substrate, and these are laminated by pressure bonding to obtain an optical laminate.
  • a member constituting the laminate may be prepared, and a member constituting the laminate may be placed between the first transparent substrate and the second transparent substrate, and these are laminated by pressure bonding to produce an optical laminate incorporating the laminate.
  • first, first and second transparent substrates and a member (a thermoplastic resin film or a laminate) to be disposed between the first and second transparent substrates are prepared.
  • the laminate to be disposed between the first and second transparent substrates may be appropriately selected depending on the structure of the optical laminate to be obtained, and for example, in the first embodiment, a single thermoplastic resin film may be prepared, and in the second embodiment, a laminate consisting of two thermoplastic resin films and one functional layer may be prepared.
  • a functional member may be attached to at least one of the first and second transparent substrates, and it is preferable that the functional member is attached to the transparent substrate before it is integrated into the optical laminate. Therefore, in the above manufacturing method, at least one of the first and second transparent substrates may be prepared as a transparent substrate to which a functional member is attached. For example, as described above, in the case where the transparent substrate constitutes a substrate for a display device, at least one of the first and second transparent substrates may be prepared as a display device.
  • thermoplastic resin film or a laminate may be disposed between the first transparent substrate and the second transparent substrate, and these may be bonded together to integrate the substrate and obtain an optical laminate.
  • a member constituting the laminate may be disposed between the first transparent substrate and the second transparent substrate, and these may be bonded together to integrate the substrate and obtain an optical laminate incorporating the laminate.
  • the thermoplastic resin film or laminate may be arranged according to the layer structure of the optical laminate to be obtained.
  • the thermoplastic resin film, the functional layer, and the thermoplastic resin film may be arranged between the first and second transparent substrates in this order.
  • the lamination may be performed in a vacuum bag, in an autoclave under low temperature conditions, or by a press machine other than these, but among these, it is preferable to perform it in a vacuum bag. Also, before performing the lamination, temporary pressure bonding may be performed using a rubber roll or the like.
  • the lamination must be performed under low-temperature conditions, specifically, compression bonding is preferably performed at a temperature of 110°C or less.
  • the lamination is preferably performed at low temperature and low pressure, specifically, compression bonding is preferably performed at a temperature of 110°C or less and a pressure of 1.0 MPa or less.
  • the functional layer and the functional members e.g., display devices
  • the temperature during lamination is preferably 100° C. or lower from the viewpoint of more reliably preventing deterioration or inactivation of the functional component, and is preferably 60° C. or higher, more preferably 70° C. or higher, from the viewpoint of preventing the generation of residual air or foaming.
  • the pressure during lamination is preferably 1.2 MPa or less from the viewpoint of more reliably preventing deterioration or deactivation of the functional member.
  • the pressure may be, for example, 0.095 MPa or less, preferably 0.08 MPa or less, and more preferably 0.06 MPa or less.
  • the pressure during lamination is not particularly limited with respect to the lower limit, but when lamination is performed under pressure, such as in an autoclave, the pressure is preferably 0.5 MPa or more, more preferably 0.7 MPa or more. When lamination is performed under negative pressure, such as in a vacuum bag, the pressure is preferably 0.001 MPa or more, more preferably 0.005 MPa or more.
  • the time for lamination under the above temperature and pressure is not particularly limited, but is, for example, 5 to 120 minutes, and preferably 10 to 60 minutes.
  • the optical laminate of the present invention is not particularly limited and can be used for various purposes, but can be suitably used as laminated glass.
  • the optical laminate of the present invention is used as window glass for vehicles such as automobiles and trains, various vehicles such as ships and airplanes, various buildings such as buildings, condominiums, detached houses, halls, gymnasiums, machine tools such as cutting and polishing, construction machines such as shovels and cranes, and partitions inside various vehicles and various buildings, and is preferably used for vehicle applications such as automobiles, and is preferably used as window glass for vehicles.
  • the optical laminate of the present invention may be used for various display applications, for example, when a display device is constructed using a transparent substrate. As a display application, the above-mentioned window glass and partitions may be used as displays.
  • the optical laminate may be used as a cover glass for various displays, and may be applied to, for example, in-vehicle displays.
  • the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
  • the methods for measuring and evaluating the various physical properties in the present invention are as follows. ⁇ Amount of Hydroxyl Groups, Degree of Acetylation, Degree of Acetalization> Measurement of the content (mass%) of ethylene groups bonded to hydroxyl groups 0.4 g of sample was precisely weighed into a 200 mL Erlenmeyer flask with a stopper. After adding 10.0 mL of pyridine-acetic anhydride mixture to the sample, the sample was dissolved in the pyridine-acetic anhydride mixture by heating and ultrasonic irradiation on a water bath at a bath temperature of 90°C.
  • a reflux condenser was attached to the Erlenmeyer flask, and the mixture was heated and refluxed on a water bath for 120 minutes. After the reaction, the cooling tube was washed using 25 mL of pyridine, and the sample solution after the reaction was cooled to room temperature. After cooling, 20 mL of 1,2-dichloroethane was added to the sample solution, and the mixture was shaken, and then 50 mL of water was added, shaken, and left at room temperature for 30 minutes. The sample solution was then subjected to potentiometric titration with 0.5 mol/L (0.5N) sodium hydroxide solution.
  • a blank test was performed in the same manner, except that no sample was used, and the content (mass%) of ethylene groups bonded to hydroxyl groups in the sample was calculated based on the following formula.
  • W OH is the content (mass%) of ethylene groups bonded to hydroxyl groups
  • V BL is the amount (mL) of sodium hydroxide solution used in the blank test
  • V sp is the amount (mL) of sodium hydroxide solution used in the sample titration
  • f NaOH is the factor of the 0.5 mol/L sodium hydroxide solution actually used in the potentiometric titration
  • m is the sample mass (g).
  • ethylene group content (mass%) to which acetyl groups are bonded 0.4 g of sample was precisely weighed into a 200 mL Erlenmeyer flask with a stopper. After adding 100.0 mL of ethanol to the sample, the sample was dissolved in ethanol by heating and ultrasonic irradiation on a water bath at a bath temperature of 90 ° C. While shaking the Erlenmeyer flask, 10.0 mL of 0.2 mol/L (0.2N) sodium hydroxide was added. A reflux condenser was attached to the Erlenmeyer flask, and the mixture was heated and refluxed in a water bath for 60 minutes.
  • the cooling tube was washed using 25 mL of ethanol, and the sample solution after the reaction was cooled to room temperature.
  • 10.0 mL of 0.2 mol/L (0.2N) hydrochloric acid was added, shaken well, and left at room temperature for 30 minutes.
  • the sample solution was then subjected to potentiometric titration with 0.1 mol/L (0.1N) sodium hydroxide solution.
  • a blank test was carried out in the same manner, except that no sample was used, and the content (mass%) of ethylene groups bonded to acetyl groups in the sample was calculated based on the following formula.
  • W Ac is the content (mass%) of ethylene groups bonded to acetyl groups
  • V BL is the amount (mL) of sodium hydroxide solution used in the blank test
  • V sp is the amount (mL) of sodium hydroxide solution used in the sample titration
  • f NaOH is the factor of the 0.1 mol/L sodium hydroxide solution actually used in the potentiometric titration
  • m is the sample mass (g).
  • the hydroxyl group amount (mol %), the acetylation degree (mol %) and the acetalization degree (mol %) were calculated based on the following formulas using the content of ethylene groups bonded to hydroxyl groups, the content of ethylene groups bonded to acetyl groups and the content of ethylene groups bonded to butyral groups calculated by the above-mentioned methods.
  • thermoplastic resin layer of each of the examples and comparative examples was cut out to prepare a test sample having a diameter of 8 mm.
  • the thickness change of the prepared test sample was determined according to the method described in the specification.
  • thermoplastic resin used in each Example and Comparative Example was dissolved at a concentration of 0.05% by mass in an N-methyl-2-pyrrolidone solution to which lithium bromide had been added so as to become 10 mM, and filtered using a syringe filter (Millex-LH 0.45 ⁇ m, manufactured by Merck Co., Ltd.), and the molecular weight was measured using gel permeation chromatography (e2690, manufactured by Waters Co., Ltd.).
  • the number average molecular weight (Mn) and weight average molecular weight (Mw) were calculated using a molecular weight calibration curve prepared using a monodisperse polystyrene standard sample, and the molecular weight distribution (Mw/Mn) was also determined.
  • Mn number average molecular weight
  • Mw weight average molecular weight
  • a Shodex GPC KF-806L manufactured by Showa Denko Co., Ltd.
  • an N-methyl-2-pyrrolidone solution to which lithium bromide had been added so as to become 10 mM was used as the eluent.
  • thermoplastic resin films obtained in the Examples and Comparative Examples were stored for 12 hours in an environment of room temperature 23 ⁇ 2°C and humidity 25 ⁇ 5%, and the viscoelasticity was measured under the following measurement conditions using a dynamic viscoelasticity device (manufactured by TA Instruments, product name "ARES-G2", jig "diameter 8 mm parallel plate") to detect the shear storage modulus (G') at 90°C.
  • a dynamic viscoelasticity device manufactured by TA Instruments, product name "ARES-G2", jig "diameter 8 mm parallel plate
  • thermoplastic resin layer obtained in the examples and comparative examples was laminated between two pieces of clear glass (thickness 2.5 mm) with a length of 10 cm and a width of 10 cm to obtain a laminate.
  • the obtained laminate was vacuum pressed and bonded in a vacuum laminator at 90° C. for 30 minutes. After bonding, the laminate was bonded for 20 minutes using an autoclave at 140° C. and 14 MPa to obtain an optical laminate.
  • the obtained optical laminate was stored in an environment of 100° C. for 2000 hours, and then the presence or absence of bubbles in the optical laminate was visually confirmed.
  • A: No foaming C Foaming
  • thermoplastic resins used in the examples and comparative examples were prepared as follows.
  • (Resin 1) In a reactor equipped with a stirrer, 1800 mL of ion-exchanged water and 200 g of polyvinyl alcohol A (average polymerization degree 1700, saponification degree 99 mol%) were placed, and the mixture was heated and dissolved while stirring to obtain a polyvinyl alcohol solution.
  • 30% hydrochloric acid was added as a catalyst to this solution so that the hydrochloric acid concentration was 0.2 mass%, and the temperature was adjusted to 15 ° C., and n-butyl aldehyde was added to 10 mol % while stirring.
  • n-butyl aldehyde was added to 60 mol %, and a white particulate polyvinyl butyral resin was precipitated. 10 minutes after the precipitation, 30% hydrochloric acid was added so that the hydrochloric acid concentration was 1.8 mass %, and then the temperature was raised to 53 ° C. and the mixture was aged at the aging temperature of 53 ° C. for 2 hours.
  • Resin 1 polyvinyl butyral resin, hydroxyl group amount 30.8 mol%, acetalization degree 68.4 mol%, acetylation degree 0.8 mol%, polymerization degree 1700).
  • resin 4 polyvinyl butyral resin, hydroxyl group amount 30.3 mol%, acetalization degree 68.8 mol%, acetylation degree 0.9 mol%, polymerization degree 850 was obtained in the same manner as resin 1.
  • plasticizers used in the examples and comparative examples are as follows. 3GO: Triethylene glycol-di-2-ethylhexanoate
  • Example 1 A resin composition was obtained by mixing 40 parts by mass of a plasticizer (triethylene glycol-di-2-ethylhexanoate: 3GO) with 100 parts by mass of resin 1. Using the obtained resin composition, a film-like thermoplastic resin layer having a thickness of 800 ⁇ m was produced using a hydraulic press and a spacer having a thickness of 800 ⁇ m. In addition, two sheets of 2.5 mm clear glass were prepared. Next, a thermoplastic resin layer was superposed on one of the clear glasses, and the other clear glass was further superposed on the thermoplastic resin layer to obtain a laminate. The obtained laminate was placed in a rubber bag, which is a vacuum bag, and degassed for 5 minutes at a vacuum pressure of 0.09 MPa.
  • a plasticizer triethylene glycol-di-2-ethylhexanoate: 3GO
  • the laminate was heated to 90°C at a heating rate of 1°C/min, and held at 90°C for 90 minutes for full pressure bonding, and then cooled to 30°C. Next, the pressure was returned to normal to obtain the optical laminate of Example 1.
  • Examples 2 to 3 and Comparative Examples 1 to 4 The same procedure as in Example 1 was carried out except that the amount and type of resin used and the amount of plasticizer were changed as shown in Table 1.
  • Example 4 Phthalocyanine pigment (P.B.15-1): Amount that will result in 0.0142% by mass in the resulting resin layer Perylene pigment (P.R.149): Amount that will result in 0.0030% by mass in the resulting resin layer Phthalocyanine pigment (P.G.7): Amount that will result in 0.0015% by mass in the resulting resin layer Carbon black pigment (P.Bk.7): Amount that will result in 0.0300% by mass in the resulting resin layer
  • Example 5 Phthalocyanine pigment (P.B.15-1): Amount that will result in 0.0148% by mass in the resulting resin layer Perylene pigment (P.R.149): Amount that will result in 0.0054% by mass in the resulting resin layer Phthalocyanine pigment (P.G.7): A
  • the optical laminates of Examples 1 to 6 described above had a thickness change of 80 ⁇ m or more and used a thermoplastic resin layer having a weight average molecular weight (Mw) of 220,000 or more and 310,000 or less. Therefore, even though the lamination conditions were low temperature and low pressure, the amount of remaining air during lamination was small and the high temperature heat resistance was also good. In contrast, in the optical laminates of Comparative Examples 1 and 2, the thickness change of the thermoplastic resin layer used was less than 80 ⁇ m, so a large amount of air remained during lamination. Also, in the optical laminates of Comparative Examples 3 and 4, the weight average molecular weight (Mw) of the thermoplastic resin layer used was less than 220,000, so air bubbles were generated in the heat resistance test and high-temperature heat resistance was poor.
  • Mw weight average molecular weight

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un film de résine thermoplastique ayant une structure monocouche ou une structure multicouche, le film de résine thermoplastique comprenant au moins une couche de résine thermoplastique (A) qui comprend une résine thermoplastique ; lorsque le film de résine thermoplastique a une structure multicouche, au moins une couche la plus à l'extérieur est la couche de résine thermoplastique (A) ; la quantité de changement de l'épaisseur lorsque la couche de résine thermoplastique (A) est comprimée dans un test de fluage par compression effectué dans les conditions ci-dessous est de 80 µm ou plus ; et le poids moléculaire moyen en poids (Mw) d'une résine thermoplastique (a) dans la couche de résine thermoplastique (A) est de 220 000 à 310 000.
PCT/JP2023/043349 2022-12-05 2023-12-04 Film de résine thermoplastique, stratifié et stratifié optique Ceased WO2024122514A1 (fr)

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JP7709577B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス構成体、膜及び積層膜
JP7709579B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス構成体、膜及び積層膜
JP7709576B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス用中間膜、積層膜及び合わせガラス構成体
JP7709575B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス構成体及び積層膜
JP7709578B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス用中間膜、積層膜及び合わせガラス構成体

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JPH11255827A (ja) * 1998-03-12 1999-09-21 Sekisui Chem Co Ltd ポリビニルアセタール樹脂及びこれを用いた合わせガラス用中間膜
JP2003146710A (ja) * 2001-11-13 2003-05-21 Sekisui Chem Co Ltd 合わせガラス用中間膜及び合わせガラス並びに合わせガラスの製造方法
WO2021117596A1 (fr) * 2019-12-09 2021-06-17 積水化学工業株式会社 Film de couche intermédiaire de verre feuilleté et verre feuilleté

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11255827A (ja) * 1998-03-12 1999-09-21 Sekisui Chem Co Ltd ポリビニルアセタール樹脂及びこれを用いた合わせガラス用中間膜
JP2003146710A (ja) * 2001-11-13 2003-05-21 Sekisui Chem Co Ltd 合わせガラス用中間膜及び合わせガラス並びに合わせガラスの製造方法
WO2021117596A1 (fr) * 2019-12-09 2021-06-17 積水化学工業株式会社 Film de couche intermédiaire de verre feuilleté et verre feuilleté

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7709577B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス構成体、膜及び積層膜
JP7709579B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス構成体、膜及び積層膜
JP7709576B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス用中間膜、積層膜及び合わせガラス構成体
JP7709575B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス構成体及び積層膜
JP7709578B1 (ja) * 2024-07-12 2025-07-16 積水化学工業株式会社 合わせガラス用中間膜、積層膜及び合わせガラス構成体

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