KR20160143677A - Antiglare film - Google Patents

Abstract

An object of the present invention is to provide an antiglare film which is capable of improving the visibility of a display device and having sufficient hardness by having a clear feeling with sufficient antifogging property. (6) of the antiglare film has a haze value (?)% Of the antiglare film, and the variable X is 85? X ? 105, the following equation is satisfied:? = X-12 占 log _e (?), When the thickness t of the antiglare layer has a mean particle diameter of the fine particles of (r) 占 퐉 and a variable Y satisfies the following formula: t = (r1 ^{/ 2} ) x Y , And the fine particles have an average particle diameter (r) of 0.1 to 3.0 占 퐉.

Description

Antistatic Film {ANTIGLARE FILM}

This patent application claims priority to the Paris Convention for Japanese Patent Application No. 2014-080733, which is hereby incorporated by reference in its entirety.

The present invention relates to an antiglare film. Further, the present invention relates to a display device to which the antiglare film is pasted.

BACKGROUND ART Optical films are widely used as liquid crystal display devices and the like as transparent films having specific functions. For example, a surface protective film and an antiglare film (antiglare film) used on the surface of a liquid crystal display device can be mentioned as concrete examples of the optical film. The surface protective film is a film used for protecting the glass on the surface of a liquid crystal display device or the like and has a sufficient hardness to prevent scratches even if it is pasted on the surface for a long period of time. The antiglare film is attached to the surface of a liquid crystal display or the like in order to impart good visibility without reflection. It is desired that the antiglare film functions not only in the point of being attached to the surface of a liquid crystal display device or the like but also as a surface protective film having sufficient hardness that scratches hardly occur. As such a film, an antiglare hard coat film having a hard coat layer is used.

As a conventional antiglare hard coat film, for example, Patent Document 1 discloses an antiglare hard coat film formed by forming an antiglare hard coat layer containing organic fine particles and a resin on a transparent film, wherein the organic fine particles have an average particle diameter of 2 - The refractive index difference with respect to the resin is 0.001 to 0.020, the blending amount thereof is 3 to 35 parts by weight with respect to 100 parts by weight of the resin, and the coating thickness of the anti-glare hard coat layer is 1 And the haze value of the antiglare hard coat film is 0.1 to 5.0%, the 60-degree specular gloss is 60% or more and 90% or less, the 20-degree specular gloss is 15% or more and 40% or less, Discloses an antiglare hard coat film characterized in that the transmittance (transmission Y value) is 88.00 or more.

However, since the anti-glare hard coat film of Patent Document 1 specifies the average particle diameter of the fine particles to 2 to 6 占 퐉, it is not possible to sufficiently prevent glare on a recent high-precision display and to give a surface feeling of good visibility . Further, the antiglare hard coat film of Patent Document 1 did not have sufficient hardness.

For example, Patent Document 2 discloses that a solid content concentration of not less than 3 mass% and not more than 60 mass% is formed on a transparent cellulose ester film base, and the curable compound (A) and the phosphine oxide- , And (C) an average particle diameter of 2 to 8 占 퐉, based on the total solid content, based on the total solid content, the cured composition having an antiglare layer obtained by curing the curable composition, Is 3 to 15 占 퐉 and the total haze of the antiglare film as a whole is 0.5 to 2.5%.

However, the antiglare film of Patent Document 2 has a large particle diameter of the translucent resin particles, is liable to cause glare, and can not be said to have good visibility.

For example, Patent Document 3 discloses an antiglare film having an antiglare layer formed of a composition comprising at least a curable resin compound (A) and a light transmitting particle (B) on a transparent support, wherein the antifoggant layer has a thickness (B) the refractive index of the light-transmitting particles is 1.1 to 3.0, the total haze value of the antiglare film is 0.5 to 5.0% and the internal haze value is 1.5% Discloses an antiglare film having an upper localization ratio of 45% to 99% as represented by the following formula in the film.

(B) existing in a film thickness region of 50% on the opposite side of the transparent support from the center of the layer in the film thickness direction of the layer formed of the composition containing the components (A) and (B) The total number of the component (B) present in the entire layer formed of the composition containing the components (A) and (B)] × 100 (%)

However, in the antiglare film of Patent Document 3, when the particle diameter of the light transmitting particle is small, the film thickness of the antiglare layer becomes extremely thin and the hardness of the antiglare film becomes insufficient. In addition, it is technically difficult to stably localize on the upper part of the light-transmitting particle in the light-diffusing layer, and there is a problem that the surface of the light-scattering layer is not uniform.

In addition, other conventional antiglare films can not solve the problem of white light on a coating film formed as a layer for imparting antiglare property, while taking into consideration that the antiglare property is enhanced. Such a conventional antiglare film has a problem in that, when an image is displayed on a liquid crystal display device or the like to which the antiglare film is pasted, a screen of a liquid crystal display device or the like is exposed to white light, resulting in deterioration of contrast and glare.

Japanese Laid-Open Patent Publication No. 2010-256850 Japanese Laid-Open Patent Publication No. 2013-76785 Japanese Laid-Open Patent Publication No. 2012-159691

The conventional anti-glare hard coat film has a problem that it is not sufficiently low in contrast, glare, etc. to sufficiently prevent visibility to a liquid crystal display device or the like, and does not have sufficient hardness. There has been a problem in that good visibility can not be given particularly in a high-precision liquid crystal display device or the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems in the prior art, and it is an object of the present invention to provide an antiglare film which can improve visibility of a display device and has sufficient hardness, .

The present inventors have intensively studied and, as a result, have found that an antiglare film having a transparent film and an antiglare layer containing fine particles and a resin, wherein the antiglare film has a degree of gloss of 60 degrees (? X-12 占 log _e (?) When the variable X is 85? X? 105, When the thickness t of the antiglare layer has a mean particle diameter of the fine particles of (r) 占 퐉 and a variable Y satisfies the following formula: t = (r1 ^{/ 2} ) x Y , And the average particle diameter (r) of the fine particles is 0.1 to 3.0 μm.

The present invention has the following aspects.

[1] An antiglare film having a transparent film and an antiglare layer containing fine particles and a resin, wherein the antiglare film has a degree of gloss of 60 degrees (?), A haze value of the antiglare film as? when 85≤X≤105 days following formula: and satisfies _{β = X-12 × log e} (α), When the thickness t of the antiglare layer has a mean particle diameter of the fine particles of (r) 占 퐉 and a variable Y satisfies the following formula: t = (r1 ^{/ 2} ) x Y , And the fine particles have an average particle diameter (r) of 0.1 to 3.0 占 퐉.

[2] The antiglare film according to [1], wherein the resin is an ionizing radiation curable resin.

[3] The antiglare film according to [1] or [2], wherein the fine particles are inorganic fine particles.

[4] The antiglare film described in any one of [1] to [3], wherein the value obtained by dividing the thickness t of the antiglare layer by the mean particle diameter r of the fine particles is 2 to 15.

[5] The antiglare film described in any one of [1] to [4], wherein the value obtained by dividing the thickness t of the antiglare layer by the mean particle diameter r of the fine particles is 3.5 to 10.

[6] The antiglare film described in any one of [1] to [5], wherein the antiglare film has a haze value (α) of 2 to 10%.

[7] The antiglare film described in any one of [1] to [6], wherein the antiglare film has a total light transmittance of 88% or more.

The antiglare film of the present invention has sufficient transparency and clearness to improve the visibility of the display device and has sufficient hardness.

1 is a schematic cross-sectional view of an antiglare film according to an embodiment of the present invention.
2 is a schematic cross-sectional view of an antiglare film in which an adhesive layer and a release layer are further laminated as an antiglare film according to an embodiment of the present invention.
3 is a schematic cross-sectional view illustrating the configuration of a display device to which an antiglare film according to an embodiment of the present invention is pasted.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic cross-sectional view of an antiglare film according to an embodiment of the present invention.

The antiglare film (10) has a transparent film (2) and an antiglare layer (1) laminated on one surface of the transparent film (2). The antiglare film of the present invention may have a layer other than the transparent film and the antiglare layer. 2, the antiglare film 11 of the present invention comprises a transparent film 2, an antiglare layer 1 laminated on one surface of the transparent film 2, a transparent film 2, And a peeling layer 4 which is present on the surface of the adhesive layer 3 opposite to the transparent film 2. The surface of the antiglare layer 1 is temporarily protected until the antiglare film 10 is adhered to a display device or the like on the surface of the antiglare layer 1 (the surface opposite to the transparent film 2) The protective layer may be further laminated. The antiglare film (10) is not particularly limited as long as the antiglare layer (1) is present in the outermost layer.

3 is a schematic cross-sectional view showing a cross section of a display device in which an antiglare film of the present invention is bonded onto a surface. The glass 20 is a member of the display device provided on the front face of the display device. The display device is not particularly limited, for example, a liquid crystal display (LCD), a plasma display panel (PDP), an electroluminescence display (ELD), or a cathode ray tube display (CRT). 3, the antiglare film 10 is pasted on the surface of the glass 20 via the adhesive layer 3. 3 may be formed by pasting the release film 4 of the antiglare film 11 on the surface of the glass 20 or attaching the adhesive layer 3 to the surface of the glass 20 And then laminating the antiglare film 10 on the surface thereof. The glass 20 is not particularly limited, and is a member constituting the front surface of the display device. The glass 20 may be replaced with another member such as a hard coat film.

≪

X-12 占 log _e (?) When the variable X is 85? X? 105, and the haze value of the antiglare film is? . log _e (α) represents the log of the percentage value (α) of the haze below the Napier constants (e = 2.7182 ...). Therefore, β is a value obtained by multiplying the log of the haze value (α)%, which is obtained by multiplying the logarithm of -12 by the Napier constant below the variable X. When the 60 degree gloss (?) Satisfies the above formula, the variable X preferably satisfies the expression of 85? X? 100, and more preferably satisfies the expression of 85? X? 95.

In the present invention, the 60-degree glossiness () and haze value ()% of the antiglare film can be measured by the following procedure.

The 60 degree gloss (?) Is measured in accordance with JIS Z 8741. Specifically, a black vinyl tape (Nitto vinyl tape, PROSELF No) was laminated on the opposite side of the coating side (surface on the side where the film was not coated) of each of the antiglare hard coat films by using Gloss Meter (GM-3D) .21 (wider)), and measure the 60 degree glossiness of each of the antiglare hard coat films.

The haze value (?) Is measured in accordance with JIS K7136. Specifically, the measurement is carried out using a haze meter "NDH4000" manufactured by Nippon Denshoku Co.,

The thickness t of the antiglare layer satisfies the formula: t = (r1 ^{/ 2} ) xY when the average particle diameter of the fine particles is (r) m and the variable Y is 4 & . t is a value obtained by multiplying the square root of the average particle diameter (r) 占 퐉 by Y. The variable Y preferably satisfies the expression 5? Y? 10, more preferably 5? Y? 9.

The thickness t of the antiglare layer can be measured, for example, by observing the cross-section photograph of the antiglare layer with an electron microscope or the like and measuring the surface to the surface.

The average particle diameter (r) of the fine particles contained in the antiglare layer is 0.1 to 3.0 탆. The average particle diameter (r) is preferably 0.1 to 2.5 占 퐉, more preferably 0.1 to 2.0 占 퐉, still more preferably 0.2 to 2.0 占 퐉, still more preferably 0.3 to 2.0 占 퐉, still more preferably 0.4 To 2.0 占 퐉, and most preferably from 0.5 to 2.0 占 퐉.

The resin contained in the antiglare layer is preferably an ionizing radiation curable resin. The ionizing radiation curing resin is a resin cured by irradiating with an electron beam or ultraviolet rays. In the present invention, the ionizing radiation curable resin is preferably substantially transparent. As the substantially transparent ionizing radiation curable resin, for example, an acrylic ultraviolet curable resin is preferably used. The acrylic resin is a resin obtained by polymerizing a resin composition containing a monomer component having a (meth) acryloyl group as a main component. The acrylic resin is preferably a polyol polyacrylate such as dipentaerythritol hexaacrylate as a main component.

As the fine particles contained in the antiglare layer, organic fine particles or inorganic fine particles can be used. The fine particles contained in the antiglare layer may be a mixture of organic fine particles and inorganic fine particles. The fine particles contained in the antiglare layer may be a mixture of two or more different fine particles.

As the material of the organic fine particles, it is preferable to use a material having a refractive index that is small in refractive index from the resin of the main component (for example, ionizing radiation curable resin) constituting the antiglare layer. The difference in refractive index is preferably, for example, 0.1 or less, more preferably 0.01 or less. It is more preferable to use organic fine particles made of the same resin as the resin constituting the antiglare layer. Examples of the material for forming the organic fine particles include triacetylcellulose resin, polycarbonate resin, polyethylene terephthalate resin, norbornene resin, polyethylene resin and acrylic resin.

As the inorganic fine particles, metal oxide particles can be used. The metal oxide particles are preferably, for example, silica particles or alumina particles. The inorganic fine particles are preferably made of a material having a refractive index with a small difference from the refractive index of the main component resin (for example, ionizing radiation curable resin) constituting the antiglare layer. The difference in refractive index is preferably, for example, 0.1 or less, more preferably 0.01 or less. The silica can be obtained by, for example, a wet method.

The antiglare layer can be formed by applying a coating liquid containing resin and fine particles onto the surface of a target (transparent film) and drying the coating liquid.

The content of the resin is preferably from 15 to 55% by weight, more preferably from 20 to 50% by weight, more preferably from 25 to 50% by weight, based on 100% by weight of the total weight of the coating solution for forming the antiglare layer. 45% by weight, and most preferably 30 to 45% by weight.

The content of the fine particles is preferably 1 to 50% by weight based on 100% by weight of the total weight of the resin contained in the coating liquid for forming the antiglare layer. When the content of the fine particles is within this range, the antiglare film of the present invention has further excellent optical properties. The content of the fine particles is more preferably 2 to 45% by weight, still more preferably 5 to 40% by weight, and most preferably 10 to 30% by weight.

The coating liquid may contain a resin and a solvent for dissolving or dispersing the fine particles. As the solvent, aromatic hydrocarbons such as toluene and alkyl alcohols having 1 to 5 carbon atoms such as isobutyl alcohol can be used. A solvent containing an aromatic hydrocarbon and an alcohol having 1 to 5 carbon atoms is preferable.

When the solvent of the coating liquid contains an aromatic hydrocarbon and an alcohol having 1 to 5 carbon atoms, the ratio of the aromatic hydrocarbon and the alcohol having 1 to 5 carbon atoms is preferably 2: 1 to 1: 2. The ratio is more preferably 3: 2 to 2: 3, more preferably 5: 4 to 4: 5, and most preferably substantially 1: 1.

The content of the solvent contained in the coating solution is preferably 20 to 80% by weight based on 100% by weight of the total weight of the coating solution for sufficiently dissolving or dispersing the resin and the fine particles. The content of the solvent is more preferably 30 to 70% by weight, and still more preferably 40 to 60% by weight.

The antiglare layer can be applied by, for example, gravure coating, microgravure coating, bar coating, slide die coating, slot die coating, dip coating and the like. The thickness of the antiglare layer can be easily adjusted by these methods. Here, the thickness of the antiglare layer can be measured, for example, by observing a cross-section photograph of the antiglare layer with an electron microscope or the like, and measuring from the interface to the surface.

The value obtained by dividing the thickness t of the antiglare layer by the average particle diameter r of the fine particles is preferably 2 to 15, more preferably 3.5 to 10, and most preferably 7 to 8.

<Transparent film>

As the transparent film constituting the antiglare film of the present invention, for example, a highly transparent resin film such as a triacetyl cellulose film, a polycarbonate film, an acrylic film, a polyethylene terephthalate film or a norbornene film can be used. In this specification, the film is not particularly limited as long as it is transparent. Normally, when the film is transparent, it means that the total light transmittance is 88% or more. Films other than those exemplified above may also be used. The retardation due to birefringence of the transparent film is also not particularly limited. A general stretched film of 2000 to 5000 nm, a low-retardation film of less than 2000 nm, a high-retardation film of more than 5000 nm, and the like can be used depending on the use. The thickness of the transparent film may be, for example, 10 to 250 mu m. The thickness of the transparent film is preferably 25 to 200 mu m, more preferably 50 to 150 mu m. When the thickness of the transparent film is in the above range, the antiglare film of the present invention can have sufficient strength and desirable optical properties.

<Antidrug film>

The haze value (?) Of the antiglare film is preferably 2 to 10%. By setting the haze value within this range, it is possible to sufficiently reduce the white light when the antiglare film is attached to the display device. The haze value? Of the antiglare film is more preferably 2 to 8%, still more preferably 2 to 6%, and most preferably 2 to 4%.

The antiglare film preferably has a total light transmittance of 88% or more. When the antiglare film is attached to the display device by the total light transmittance within this range, the brightness and contrast of the display device are further increased. The total light transmittance is more preferably 90% or more, still more preferably 92% or more, and most preferably 94% or more.

Example

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

&Lt; Example 1 &gt;

Preparation of Coating Solution

90 parts by weight of an acrylic ultraviolet-curable resin (solid content: 100%, trade name: light acrylate DPE-6A, manufactured by Kyoeisha Chemical Co., Ltd.), 10 parts by weight of silica having an average particle diameter of 1.0 탆 (trade name: Seihostar, Nippon Shokubai Co., , 0.3 parts by weight of a dispersing agent (trade name: DISPERBYK102, manufactured by Big-Chem Japan Co., Ltd.) and 0.2 parts by weight of an anti-settling agent (trade name: BYK411, manufactured by Big Chem Japan Co., Ltd.) were dispersed.

Preparation of dispersion

To 47.6 parts by weight of the dispersion (A), 2.4 parts by weight of a photoinitiator (trade name: IRGACURE 184, manufactured by BASF Corporation), 25 parts by weight of toluene and 25 parts by weight of isobutyl alcohol were mixed and stirred to obtain a coating liquid (B).

Manufacture of antiglare film

The coating liquid (B) was coated on the surface of one side of a PET (polyethylene terephthalate) film having a thickness of 100 m (trade name: Lumirror, manufactured by Toray Co., Ltd.) with a bar coater and cured by irradiation with ultraviolet rays of 300 mJ / &Lt; / RTI &gt; The average film thickness of the obtained antiglare film was 7.1 mu m.

&Lt; Example 2 &gt;

Preparation of dispersion and preparation of coating liquid

A coating liquid (C) was obtained in the same manner as in Example 1 except that the amount of the silica particles in the dispersion (A) of Example 1 was changed to 20 parts by weight.

Manufacture of antiglare film

The obtained coating liquid (C) was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries, Inc.) with a bar coater and cured by irradiation with ultraviolet rays of 300 mJ / cm2 to obtain an antiglare film. The average film thickness of the obtained antiglare film was 7.3 탆.

&Lt; Example 3 &gt;

Preparation of dispersion and preparation of coating liquid

A coating liquid (D) was obtained in the same manner as in Example 1 except that the amount of silica contained in the dispersion (A) of Example 1 was changed to 30 parts by weight.

Manufacture of antiglare film

The obtained coating liquid (D) was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries, Inc.) with a bar coater and cured by irradiation with ultraviolet rays of 300 mJ / cm2 to obtain an antiglare film. The average film thickness of the obtained antiglare film was 7.3 탆.

<Example 4>

Preparation of dispersion and preparation of coating liquid

(E) was prepared in the same manner as in Example 1 except that the silica of the dispersion (A) of Example 1 was changed to 10 parts by weight of silica having an average particle diameter of 0.4 탆 (trade name: Seihostar, manufactured by Nippon Shokubai Co., ).

Manufacture of antiglare film

The obtained coating liquid (E) was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries, Inc.) with a bar coater and cured by irradiation with ultraviolet rays of 300 mJ / cm2 to obtain an antiglare film. The average film thickness of the obtained antiglare film was 4.0 탆.

&Lt; Example 5 &gt;

Preparation of dispersion and preparation of coating liquid

The procedure of Example 1 was repeated except that the silica particles of the dispersion (A) of Example 1 were changed to 10 parts by weight of silica having an average particle diameter of 2.8 mu m (trade name: Seihostar, manufactured by Nippon Shokubai Co., Ltd.) F).

Manufacture of antiglare film

The obtained coating liquid (F) was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries, Inc.) with a bar coater and cured by irradiation with ultraviolet rays of 300 mJ / cm2 to obtain an antiglare film. The average film thickness of the obtained antiglare film was 7.6 mu m.

&Lt; Example 6 &gt;

Manufacture of antiglare film

The coating liquid (C) was coated on a TAC (triacetyl cellulose) film (trade name: Fujifilm, Fuji Film) having a thickness of 100 占 퐉 by a bar coater and cured by irradiation with ultraviolet rays of 300 mJ / cm2 to obtain an antiglare film. The average film thickness of the obtained antiglare film was 7.0 mu m.

&Lt; Example 7 &gt;

Manufacture of antiglare film

The coating liquid (C) was applied to an acrylic film (trade name: manufactured by Sumitomo Chemical Co., Ltd.) having a thickness of 75 占 퐉 by a bar coater and irradiated with ultraviolet rays of 300 mJ / cm2 to cure to obtain an antiglare film. The average film thickness of the obtained antiglare film was 7.1 mu m.

&Lt; Example 8 &gt;

Preparation of dispersion and preparation of coating liquid

The procedure of Example 1 was repeated except that the silica particles of the dispersion (A) of Example 1 were changed to 20 parts by weight of acrylic particles having an average particle diameter of 1.5 μm (trade name: MX-150, available from Soken Chemical Co., Ltd.) G).

Manufacture of antiglare film

The obtained coating liquid (G) was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, Toray Co., Ltd.) with a bar coater and cured by irradiation with ultraviolet rays of 300 mJ / cm2 to obtain an antiglare film. The average film thickness of the obtained antiglare film was 8.5 탆.

&Lt; Comparative Example 1 &

Preparation of dispersion and preparation of coating liquid

To 47.6 parts by weight of the dispersion (A) of Example 1, 2.4 parts by weight of a photoinitiator (trade name: IRGACURE 184, manufactured by BASF KK), 40 parts by weight of toluene and 25 parts by weight of isobutyl alcohol were mixed and stirred to obtain a coating solution (H).

Manufacture of antiglare film

The obtained coating liquid (H) was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries, Inc.) with a bar coater and cured by irradiation with ultraviolet rays of 300 mJ / cm2 to obtain an antiglare film. The average film thickness of the obtained antiglare film was 7.5 mu m.

&Lt; Comparative Example 2 &

Preparation of dispersion and preparation of coating liquid

To 47.6 parts by weight of the dispersion (A) of Example 1, 2.4 parts by weight of a photoinitiator (trade name: IRGACURE 184, manufactured by BASF Corporation), 10 parts by weight of toluene and 25 parts by weight of isobutyl alcohol were mixed and stirred to obtain a coating solution (I).

Manufacture of antiglare film

The resultant coating liquid (I) was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries, Inc.) with a bar coater and irradiated with ultraviolet rays of 300 mJ / cm2 to be cured to obtain an antiglare film. The average film thickness of the obtained antiglare film was 7.1 mu m.

&Lt; Comparative Example 3 &

Manufacture of antiglare film

The coating liquid (B) obtained in Example 1 was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries Co., Ltd.) with a bar coater and irradiated with ultraviolet rays of 300 mJ / A film was obtained. The average film thickness of the obtained antiglare film was 1.9 mu m.

&Lt; Comparative Example 4 &

Manufacture of antiglare film

The coating liquid (B) obtained in Example 1 was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries Co., Ltd.) with a bar coater and irradiated with ultraviolet rays of 300 mJ / A film was obtained. The average film thickness of the obtained antiglare film was 15.4 占 퐉.

&Lt; Comparative Example 5 &

Preparation of dispersion and preparation of coating liquid

A coating solution (J) was prepared in the same manner as in Example 1, except that the silica of the dispersion (A) of Example 1 was changed to 10 parts by weight of silica having an average particle size of 5.0 占 퐉 (trade name: Shark Silk, Tokai Chemical Industry Co., ).

Manufacture of antiglare film

The obtained coating liquid (J) was coated on a PET (polyethylene terephthalate) film having a thickness of 100 占 퐉 (trade name: Lumirror, manufactured by Toray Industries, Inc.) with a bar coater and cured with ultraviolet rays of 300 mJ / cm2 to obtain an antiglare film. The average film thickness of the obtained antiglare film was 11.0 占 퐉.

Each of the antiglare hard coat films prepared in the above-described Examples and Comparative Examples was evaluated for the following items, and the results are summarized in Table 1 below.

(1) Haze value

The haze value of each of the antiglare hard coat films was measured using a haze meter &quot; NDH4000 &quot; manufactured by Nippon Denshoku Kabushiki Kaisha, in accordance with JIS K7136.

(2) 60 degree gloss

Black vinyl tape (nitto vinyl tape, polyvinyl chloride film) was applied to the opposite side of the coating side (surface on the side where the film was not coated) of each of the antiglare hard coat films using a gloss meter (GM-3D) manufactured by Murakami Color Research Laboratory based on JIS Z 8741, PROSELF No. 21 (wide)) was attached to the film, and the 60 degree glossiness of each of the antiglare hard coat films was measured.

(3) Clear feeling

Each of the antiglare films obtained in Examples and Comparative Examples was installed at a position of 0.5 m from an observer and a liquid crystal display provided at a position of 1.0 m from an observer was observed. When the image was displayed on the liquid crystal display, the antiglare film having a good clarity of the displayed image was evaluated as &quot;? &Quot;, and the film with a slightly better image clarity was evaluated as &quot; &Quot;

(4) repellency

Each of the antiglare films obtained in the above Examples and Comparative Examples was stuck to a black plastic plate with a pressure-sensitive adhesive interposed therebetween. A fluorescent lamp was irradiated on each antiglare film to visually evaluate the light diffusion state of the antiglare film. A film having a good light diffusion state was evaluated as &quot;? &Quot;, a slightly better film was evaluated as &quot;? &Quot;, and a defective film was evaluated as &quot; x &quot;.

(5) Flashing

The antiglare films obtained in Examples and Comparative Examples were respectively installed on the surface of the liquid crystal display of 147 [pixels / inch], and the glare was evaluated. A good film was evaluated as &quot;? &Quot;, a slightly good film was evaluated as &quot;? &Quot;, and a defective film was evaluated as &quot; x &quot;.

(6) Pencil Hardness

The pencil hardness of each of the antiglare hard coat films was measured according to JIS K 5600-5-4. A film having a pencil hardness of 3H was evaluated as &quot;? &Quot;, and a film having a pencil hardness of 2H was evaluated as &quot; x &quot;.

Based on the above evaluation items, it was judged whether or not the antiglare films of each of the Examples and Comparative Examples were passed. Particularly excellent ones were evaluated as &quot;? &Quot;, excellent ones were evaluated as &quot;? &Quot;, and those that were not suitable for use were evaluated as &quot; These results are shown in Table 1 below.

It was found that the antiglare films obtained in Examples 1 to 8 had a clear feeling and had excellent pencil hardness while having appropriate antifogging properties as compared with the antiglare films of Comparative Examples 1 to 5. In particular, it was found that the antiglare films of Examples 1 and 2 are excellent antiglare films because they are excellent in all of clearness, antistatic property, anti-glare and hardness.

1: antiglare layer
2: Transparent film
3: Adhesive layer
4: Release layer
10, 11: Antiglare film
20: Glass (the most surface member of the display apparatus)

Claims (7)

As an antiglare film having a transparent film and an antiglare layer containing fine particles and a resin,
Wherein when the value of the haze value of the antiglare film is (?)% And the value of the variable X is 85? X? 105, the 60 degree gloss (?) Of the antiglare film satisfies the following formula:
beta = X-12 x log _e (?),
Wherein when the thickness t of the antiglare layer is 탆 and the average particle diameter of the fine particles is (r) 탆 and the variable Y is 4 ≤ Y ≤ 10,
t = (r1 ^{/ 2} ) x Y,
Wherein the fine particles have an average particle diameter (r) of 0.1 to 3.0 占 퐉. The method according to claim 1,
Wherein the resin is an ionizing radiation curable resin. 3. The method according to claim 1 or 2,
Wherein the fine particles are inorganic fine particles. 4. The method according to any one of claims 1 to 3,
Wherein the value obtained by dividing the thickness (t) 占 퐉 of the antiglare layer by the average particle diameter (r) 占 퐉 of the fine particles is 2 to 15. 5. The method according to any one of claims 1 to 4,
Wherein the value obtained by dividing the thickness (t) 占 퐉 of the antiglare layer by the average particle diameter (r) 占 퐉 of the fine particles is 3.5 to 10. 6. The method according to any one of claims 1 to 5,
Wherein the antiglare film has a haze value (?) Of 2 to 10%. 7. The method according to any one of claims 1 to 6,
Wherein the antiglare film has a total light transmittance of 88% or more.

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