JPH10268111A - Nonglare sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nonglare sheet having high transmitted image resolution, having little external incident light, and excellent in visibility by forming a nonglare layer made of the hardened film of an energy line hardening resin composition on a transparent film, and applying the specific transmitted image resolution. SOLUTION: This nonglare sheet is provided with the layer of the hardened film of an energy line hardening resin composition on a transparent film. The transmitted image resolution by an image clarity measuring instrument is set to 10-70%, more preferably to 15-70%, at the optical comb width of 0.05 mm. The positive reflection factor of the 15 deg.-incident light by a spectrophotometer is preferably set to 1% or below. A nonglare layer is formed with the hardened film of an energy line hardening resin composition containing fine grains and a solvent dry type resin, and it preferably contains the fine grains below 10 pts.wt. against the energy line hardening resin composition of 100 pts.wt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-glare sheet having high visibility of a transmitted image and excellent visibility with little reflection of external light.

[0002]

2. Description of the Related Art A so-called non-glare sheet in which fine irregularities are formed on the surface of a display body is widely used as a method of reducing reflection of external light on the surface of a display body.
Conventionally, this non-glare sheet is a sand blast method in which fine powder solids are sprayed on the surface of a transparent synthetic resin sheet to make the surface uneven, or an uneven pattern is transferred to the resin sheet using a glass, a mold, a roll, or the like processed into an uneven shape. It is formed by an embossing method, a method in which fine particles such as silica are contained in an ultraviolet-curable resin composition, applied to a film, and then irradiated with ultraviolet light to form a cured film having irregularities.

[0003]

In recent years, various types of image display devices, such as liquid crystal display devices, have been developed to have higher definition, have less reflection of external light, and are required to display clearer images. . However, in the conventional non-glare sheet, if the light scattering property (haze value) is increased, reflection of external light is reduced, but at the same time, there is a problem that a displayed image becomes unclear. Further, the non-glare sheet manufactured by the conventional embossing method has a problem that the hard coat property is poor and the sheet is easily damaged.

[0004]

Means for Solving the Problems In view of such circumstances, the present inventors have made intensive studies to improve these drawbacks. As a result, the non-glare layer is formed of a cured film of an energy ray-curable resin composition. The non-glare sheet, in which the transmitted image clarity in the image clarity measuring device is 10 to 70% with an optical comb width of 0.05 mm, is hard to be scratched, the transmitted image is clear, and the reflection of external light is reduced. The present invention led to the heading. That is, the present invention provides (1)
A non-glare sheet having a non-glare layer composed of a cured film of an energy ray-curable resin composition and having a transmitted image clarity of 10 to 70% at an optical comb width of 0.05 mm in an image clarity measuring device; (1) The transmitted image sharpness in the imager is 15 to 80% with an optical comb width of 0.125 mm.
(3) the specular photometer has a regular reflectance of 1% or less at 15 ° incident light in the spectrophotometer.
Or the non-glare sheet according to (2),

(4) The non-glare layer is composed of a cured film of an energy ray-curable resin composition containing fine particles and a solvent-drying type resin, and the energy ray-curable resin composition 100
The non-glare sheet according to any one of (1) to (3), wherein the fine particles contain less than 10 parts by weight of the fine particles with respect to part by weight, and (5) the fine particles have an average particle size of from 0.5 to 0.5 by a Coulter counter method. The non-glare sheet according to claim 4, which has a mean deviation of 1.5 µm or less from the average particle size of the fine particles according to the Coulter counter method.
(7) The non-glare sheet according to any one of (4) to (6), wherein the solvent drying type resin is ethyl cellulose or hydroxypropyl cellulose, and (8) the energy ray-curable resin is )
40% by weight of a monomer having four or more acryloyl groups
The non-glare sheet according to any one of (1) to (7), which contains the above.

(9) The average thickness of the non-glare layer is 2 to 10
(1) The non-glare sheet according to any one of (1) to (8), wherein (10) the contact angle of water on the surface of the non-glare layer is 90 ° or more. (11) The non-glare sheet according to any one of (1) to (10), wherein a fluorine-based resin layer or a multilayer antireflection film is formed on the surface of the non-glare layer, (12) ( 1) A polarizing plate having a non-glare sheet according to any one of (1) to (11),
(13) An elliptically polarizing plate having the non-glare sheet according to any one of (1) to (11), (14) (1)
To (11), an image display device having the polarizing plate of (12) or the elliptically polarizing plate of (13), (15) the image display device is a liquid crystal display device, a plasma display device or The image display device according to (14), which is a CRT display device.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The non-glare sheet of the present invention has a layer composed of a cured film of an energy ray-curable resin composition on a transparent film, and the transmitted image clarity in an image clarity measuring device is an optical comb. 10% to 70% at 0.05mm width,
More preferably, it is 15 to 70% of the sheet. Further, an optical comb width of 0.125 mm and 15 to 80% is preferable. The image clarity measuring device is a device for measuring how sharp a transmitted image is, and the higher the image clarity in a narrower optical comb, the clearer the transmitted image. However, if the transmitted image definition is too high, the light scattering property is reduced, and the characteristics as a non-glare sheet are reduced. Further, the non-glare sheet of the present invention preferably has a specular photometer whose specular reflectance at 15 ° incident light is 1% or less, more preferably 0.7% or less. A spectrophotometer is a device that measures the transmittance and reflectance of light of a target object, and the lower the regular reflectance, the less the reflection of external light.

[0008] The method of preparing the non-glare sheet of the present invention may be, for example, a method in which fine particles, a solvent-drying resin and an ultraviolet-curable resin are coated on a transparent film in consideration of ease of production and hard coat properties of the surface. Preferably, a method of applying a mixed dispersion of an energy ray-curable resin composition to which a photopolymerization initiator is added, removing the solvent, irradiating with an energy ray and curing to form a cured film. Examples of energy rays include ultraviolet rays and electron beams. The fine particles mainly have an action of imparting light scattering properties, and the solvent-drying type resin has an action of mainly increasing light scattering properties and transmitted image clarity.

The solvent-drying resin is a compound which is solid at normal temperature, soluble in a solvent, and substantially insoluble in an ultraviolet-curing resin. Further, the solvent drying type resin preferably has a different dispersibility of fine particles from the ultraviolet curing type resin, and examples of such a compound include a polyester resin, a polyurethane resin, a fluororesin, a cellulose resin, and a polyolefin. Resins, acrylic resins, polycarbonate resins, acrylate resins, and the like can be mentioned, preferably a cellulose-based resin, and more preferably, ethyl cellulose and hydroxypropyl cellulose. The addition amount is preferably 0.1 to 50 parts by weight, more preferably 0.5 to 40 parts by weight, further preferably about 1 to 30 parts by weight, based on 100 parts by weight of the energy ray-curable resin composition.

Although the fine particles vary depending on the desired light scattering property and resolution, the average particle diameter by the Coulter counter method is 0.5 to 1.5 μm, preferably 1.0 to 1.5 μm.
1.5 μm is good, and the standard deviation of the average particle size is 2 μm.
m or less, preferably 1 μm or less. This average particle diameter is an average secondary particle diameter when it is composed of secondary particles.
It is also possible to mix and use a plurality of fine particles having different average particle diameters and standard deviations of the average particle diameter. The material is preferably transparent, and silica, a metal oxide or a polymer compound is suitably used. Examples of the silica include amorphous particles of silicon dioxide. Examples of the metal oxide include tin oxide, zinc oxide, titanium oxide, and alumina. Examples of the polymer compound include polymethyl (meth) acrylate resin.

The fine particles are preferably surface-treated with an organic substance in order to improve the dispersibility of the resin composition in an energy ray-curable resin composition, a solvent and the like. Examples of the organic substance used include a silane coupling agent and a wax.

The amount of the compound varies depending on the desired light scattering property, the particle size of the fine particles used, the thickness of the non-glare layer, the type and the amount of the solvent-drying resin, but the effect of the present invention is remarkable. Light scattering property (haze value) to express
Is preferably 5 to 50%, more preferably 10 to 40%
The blending amount is appropriately adjusted so as to be about the same. As a standard, the amount is less than 20 parts by weight, preferably less than 10 parts by weight, more preferably about 1 to 9 parts by weight based on 100 parts by weight of the energy ray-curable resin composition.

The energy ray-curable resin composition includes:
For example, acrylic, urethane, acrylic urethane,
An epoxy-based or silicone-based reactive compound or a mixture of two or more of them can be used. As the non-glare layer in the present invention, a layer in which a film cured by energy rays has excellent adhesion to a transparent film and has a hard coat property is preferable. In order to have a high hard coat property, a monomer having four or more (meth) acryloyl groups is used as a reactive compound, a reactive compound other than the monomer, and a photopolymerization initiator in the case of an ultraviolet curable type. Is preferred. Examples of the monomer having four or more (meth) acryloyl groups include dipentaerythritol monohydroxypentaacrylate, dipentaerythritol hexa (meth) acrylate, and hexa (meth) obtained by reacting dipentaerythritol with epsilon-caprolactone. Acrylate and the like.

The reactive compound other than the monomer having four or more (meth) acryloyl groups includes, for example, a reactive monomer other than the monomer and a reactive oligomer. As the reactive monomer, for example, pentaerythritol triacrylate, 2-hydroxyethyl (meth)
Acrylate, 2-hydroxypropyl (meth) acrylate, tetrahydrofurfuryl acrylate, glycidyl (meth) acrylate, acryloyl morpholine,
t-butylaminoethyl (meth) acrylate, 2-cyano (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, N-dimethylacrylamide, N-vinylpyrrolidone, N-vinyl-ε-caprolactam, Phenoxydiethylene glycol (meta)
Acrylate and ethylene glycol di (meth) acrylate. As the reactive oligomer, for example, a polyester (meth) acrylate obtained by reacting a polyester polyol with (meth) acrylic acid, or a reaction obtained by reacting a bisphenol-type epoxy resin with (meth) acrylate or hydroxy (meth) acrylate is used. Epoxy (meth) acrylate,
Urethane (meth) acrylate obtained by a reaction between an organic polyisocyanate and a hydroxy (meth) acrylate compound, or a reaction between a polyol, an organic polyisocyanate and a hydroxy (meth) acrylate compound, and the like.

Examples of the photopolymerization initiator include 1-hydroxycyclohexylphenylketone, (1-6-η-cumene) (η-cyclopentadienyl) iron (1+) hexafluorophosphate (1-), , 2-Dimethoxy-2-phenylacetophenone, Michler's ketone, 2-methyl- [4
-(Methylthio) phenyl] -2-morpholino-1-
Propanone, 2-benzyl-2-dimethylamino-1-
(4-morpholinophenyl) -butanone-1,2-chlorothioxanthone, 2,4-dimethylthioxanthone,
Examples thereof include 2,4-diisopropylthioxanthone, isopropylthioxanthone, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, and bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide. These photopolymerization initiators can be used alone or in combination of two or more at an arbitrary ratio.

In order to impart a high hard coat property, the amount of the monomer having four or more (meth) acryloyl groups in the total amount of the energy ray-curable resin composition is preferably at least 40% by weight, and more preferably at least 50%. It is preferable that 90% by weight and other reactive compounds are contained in an amount of 60% by weight or less, preferably about 10 to 50% by weight. In the case of an ultraviolet curable type, the photopolymerization initiator is added in an amount of 0.01 to 10 parts by weight, preferably about 0.1 to 5 parts by weight, based on 100 parts by weight of the energy ray-curable resin composition.

Further, the energy ray-curable resin composition used in the present invention imparts uniformity of the coated surface when coated on a transparent film and imparts abrasion resistance and stain resistance of the formed non-glare layer. For this purpose, various leveling agents can be further contained. Examples of such a material include a silicone-based or fluorine-based varnish, a surfactant, and a coupling agent.

In the present invention, the pencil hardness of the non-glare layer is preferably 2H or more, and the average thickness thereof is preferably about 2 to 10 μm, more preferably about 3 to 6 μm in order to maintain the hard coat property. If it exceeds 10 μm, the cured resin layer becomes too thick, so that fine irregularities are not formed and the light scattering property may be lost.

In the non-glare sheet of the present invention, it is preferable to set the contact angle of water on the surface of the non-glare layer to 90 ° or more, since it is possible to reduce the adhesion of dirt due to water droplets and sewage. In order to form such a non-glare layer, for example, a method of applying an anti-fouling agent to the surface of the non-glare layer, a method of adding an anti-fouling agent to the energy ray-curable resin composition, and the like can be mentioned. Examples of the antifouling agent include a fluorine resin and a silane coupling agent containing a fluorine atom. The thickness at the time of application or the amount to be added to the energy ray-curable resin composition is not particularly limited as long as various properties in the present invention are not substantially reduced.

In the non-glare sheet of the present invention, an anti-reflection layer is further formed on the non-glare layer as an anti-reflection layer, for example, by laminating a large number of thin films of a low refractive index fluorine resin layer or silicon dioxide or a metal compound. It is also possible. By providing the antireflection layer optically designed to reduce the reflected light by the light interference effect on the non-glare layer, light scattered on the surface of the non-glare layer can be reduced and transmitted light can be increased. Therefore, when used for a display or the like, a clearer and easier-to-view display screen is obtained, which is preferable. The thickness of the antireflection film layer and the number of layers of the multilayer antireflection film are appropriately determined depending on the refractive index of the material used.

In the non-glare sheet of the present invention, examples of the transparent film include plastics and the like, but there is no particular limitation. As the plastic, a thermoplastic resin, a thermosetting resin, an energy ray-curable resin such as ultraviolet light, etc. can be used.For example, polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, triacetyl cellulose, butyl cellulose and the like can be used. Examples include cellulose resin, polystyrene, polyurethane, vinyl chloride, acrylic resin, polycarbonate resin, and acrylate resin. When used for an image display device, a transparent plastic that is optically homogeneous and isotropic is preferable, and its refractive index is preferably 1.3 to 1.75, more preferably 1.45 to 1.45.
A value of about 1.65 is preferable. Such plastics include, for example, polyester resins, cellulosic resins,
Plastics such as acrylic resin and polycarbonate are exemplified. The thickness of the film is preferably 50 to 200 μm, more preferably 50 to 150 μm, from the viewpoint of weight reduction.
Is good. Further, in order to enhance the adhesion between the energy ray-curable resin composition and the film, it is possible to apply various treatments to the surface of the film. Examples of the treatment method include a corona treatment, an anchor treatment, a treatment with a silane coupling agent, and the like.

When the non-glare layer according to the present invention is formed on a transparent film, the photopolymerization initiator, the fine particles, and the solvent-dryable resin are uniformly dispersed in a solvent in the case of an energy ray-curable resin or an ultraviolet-curable resin. Dissolve or disperse,
A mixture or dispersion adjusted to a desired concentration,
It can be obtained by coating the film so as to have a uniform thickness, removing the solvent preferably by heating, and then irradiating with energy rays to cure the mixture. The solvent is preferably an energy ray-curable resin composition, and a solvent that dissolves the solvent-dried resin, for example, toluene, methanol, ethanol, alcohols such as isopropyl alcohol, acetone, ketones such as methyl ethyl ketone, ethyl acetate, Esters such as butyl acetate and the like. These solvents may be used alone or in a mixture at an arbitrary ratio. The method for applying the mixture or the dispersion is not particularly limited, but is preferably a uniform film thickness in order to keep the characteristics of the non-glare layer constant. For example, a wire bar method, a dip coating method, a spin coating method Various coating methods such as a gravure method, a microgravure method, and a doctor blade method can be used. The energy ray is preferably 2000 to 7 obtained from a high-pressure mercury lamp, a low-pressure mercury lamp, a xenon lamp, a germicidal lamp, a laser beam, or the like.
Electromagnetic wave energy (for example, ultraviolet light) having a wavelength of 000 angstroms or high energy rays such as electron beams, X-rays, and radiations are used. The irradiation time of the energy ray depends on the intensity of the energy ray, but is usually about 0.1 to 10 seconds.

Further, the polarizing plate of the present invention can be produced by using the non-glare sheet of the present invention on at least one side and sandwiching a polarizing element. An elliptically polarizing plate can be obtained by attaching a retardation plate to the surface of the polarizing plate opposite to the non-glare layer. In particular, in the case of a polarizing plate having a structure in which a protective film such as triacetyl cellulose is bonded to a polarizer (base film) containing a dichroic substance such as iodine or a dye in a polyvinyl alcohol film, a transparent film is used. The use of the non-glare sheet of the present invention using an acetylcellulose film is preferable in that, for example, in the process of manufacturing a polarizing plate, the polarizing plate of the present invention can be manufactured without any modification to a conventional manufacturing process. The thickness of the protective film such as triacetyl cellulose used here is preferably about 50 to 100 μm. Further, these non-glare sheets can be subjected to various surface treatments such as alkali treatment, primer treatment, corona treatment and the like in order to improve the adhesiveness and adhesion to a polarizer (base film).

By arranging the non-glare sheet thus obtained on the frontmost display surface of the image display device, the image display device of the present invention can be obtained. The image display device of the present invention can also be obtained by forming the non-glare sheet of the present invention into, for example, the above-mentioned polarizing plate or elliptically polarizing plate and then disposing the non-glare sheet on the frontmost display surface of the image display device. Examples of the image display device include an optical display device such as a liquid crystal display device, a plasma display device, and a CRT (cathode-ray tube) display device. The method of arranging the non-glare sheet of the present invention is not particularly limited, and examples thereof include a method of bonding the frontmost surface of the display using an adhesive or a pressure-sensitive adhesive.

[0025]

The present invention will be described below more specifically with reference to examples and comparative examples. The transmitted image sharpness data in Table 1 is data when the upper row has an optical comb width of 0.05 mm and the lower row has data when the optical comb width is 0.125 mm. Example 1 7.5 parts by weight of silica fine particles having an average secondary particle diameter of 1.0 μm and a standard deviation of the average secondary particle diameter of 0.5 μm, and a photopolymerization initiator (Irgacure 184: Ciba-Geigy) 5
Parts by weight, dipentaerythritol hexaacrylate 5
0 parts by weight, pentaerythritol triacrylate 30
100 parts by weight of an ultraviolet-curable acrylic resin containing 20 parts by weight of N-vinyl-ε-caprolactam in a mixed solvent of toluene and isopropyl alcohol, and then stirring 1.3 parts by weight of hydroxypropyl cellulose in toluene And isopropyl alcohol mixed solution,
A dispersion was prepared so as to have a solid content of 50% by weight. It was applied to one side of a 80 μm-thick triacetyl cellulose film by a microgravure coating method, and after evaporating the solvent, it was cured by irradiating light with a high-pressure mercury lamp of 80 W / cm to form a non-glare layer. A non-glare sheet of the present invention having a thickness of 4 μm was obtained. The obtained non-glare sheet was evaluated for light scattering, transmitted image clarity, regular reflectance, pencil hardness, and adhesion, and the results are shown in Table 1.

Example 2 4 parts by weight of silica fine particles having an average secondary particle diameter of 1.0 μm and a standard deviation of the average secondary particle diameter of 0.5 μm and 1.3 parts by weight of hydroxypropylcellulose, a photopolymerization initiator (IRGA Cure 184: Ciba-Geigy Co., Ltd.) 5 parts by weight and KP-880 (20% t-butanol solution, Shin-Etsu Chemical Co., Ltd.) 0.5 parts by weight as an antifouling agent, except for using the same operation as in Example 1. The non-glare sheet of the present invention was obtained. The non-glare layer of this non-glare sheet has 25
At 10 ° C., 10 μl (1 drop) of distilled water was dropped and left for 1 minute, and the contact angle was measured (contact angle measuring device: manufactured by Kyowa Kagaku Co., Ltd.). Further, this sheet was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 3 5.5 parts by weight of silica fine particles having an average secondary particle diameter of 1.3 μm and a standard deviation of the average secondary particle diameter of 1.2 μm, 5 parts by weight of ethyl cellulose, a photopolymerization initiator (Irgacure 1)
84: Ciba-Geigy) 5 parts by weight, 90 parts by weight of dipentaerythritol hexaacrylate, 100 parts by weight of an ultraviolet-curable acrylic resin containing 10 parts by weight of 2-hydroxyethyl acrylate, and a film thickness of 5
A non-glare sheet of the present invention was obtained in the same manner as in Example 1, except that a polyester film having an adhesive treatment of 0 μm was used. Further, this sheet was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 1 The non-glare sheet described in Example 1 of JP-A-5-341123 was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 2 Non-glare sheet manufactured by Nippon Paper Industries (trade name: TAC-HA)
-9) was evaluated in the same manner as in Example 1. Table 1 shows the results
It was shown to.

Comparative Example 3 A polarizing plate EG1425DUAGS1 manufactured by Nitto Denko Corporation was used.
Evaluation was performed in the same manner as in Example 1. Next, this was immersed in warm water to take out only the triacetyl cellulose film having a non-glare layer, and evaluated in the same manner as in Example 1. Since the results were the same as those measured with the polarizing plate, only the values measured with the polarizing plate are shown in Table 1.

Comparative Example 4 Evaluation was performed in the same manner as in Example 1 using a polarizing plate SH-1832AP-AG3 manufactured by Sumitomo Chemical Co., Ltd. Next, this was immersed in warm water to take out only the triacetyl cellulose film having a non-glare layer, and evaluated in the same manner as in Example 1. Since the results were the same as those measured with the polarizing plate, only the values measured with the polarizing plate are shown in Table 1.

Comparative Example 5 According to Example 1 of JP-A-7-181306, 8 parts by weight of silica fine particles having an average particle diameter of 1.8 μm, 100 parts by weight of an ultraviolet-curable acrylic urethane oligomer and 3 parts by weight of benzophenone were used. Stir with ethyl acetate at a high speed to prepare a mixed dispersion having a solid content of 50% by weight.
Is coated on one side of a polyester film with a wire bar, and ethyl acetate is evaporated to form a coating layer having a thickness of 10 μm, which is cured by irradiating light with a high-pressure mercury lamp of 80 W / cm to form a non-glare sheet. Obtained. Further, this sheet was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 6 A non-glare sheet was obtained in the same manner as in Example 1 except that 20 parts by weight of silica fine particles having an average secondary particle diameter of 1.3 μm and a standard deviation of the average secondary particle diameter of 1.2 μm were used. Was. Further, this sheet was evaluated in the same manner as in Example 1. The results are shown in Table 1.

[0034]

Table 1 Table 1 Light scattering properties Transmission image definition Specular reflectance Pencil hardness Adhesion (haze value) Example 1 30% 18.2% 0.3% 3H 100/100 20.8% Example 2 15% 22.0% 0.5% 3H 100/100 33.0% Example 3 28% 40.1% 0.5% 3H 100/100 45.1% Comparative Example 1 6% 0.8% 2.4% 2H 100/100 1.1% Comparative Example 2 11% 1.1% 1.8% 2H 100/100 1.7% Comparative Example 3 25% 5.1% 0.4% 3H 100/100 6.3% Comparative Example 4 5% 7.2% 2.6% 2H 100/100 9.0% Comparative Example 5 20% 0.5% 1.1% 2H 100/100 0.7% Comparative Example 6 92% 5.6 % 0.02% 3H 100/100 5.6%

(1) Light scattering property: A haze value was measured using a haze meter (manufactured by Tokyo Denshoku Co., Ltd.). (2) Transmission image clarity: A method similar to JIS K7105 image clarity measuring method was used to measure the distance between the test piece and the lens on the light receiving unit side by using an image clarity measuring device (manufactured by Suga Test Instruments Co., Ltd.).
0 cm), the transmitted image clarity was measured at an optical comb width of 0.05 mm (upper) and 0.125 mm (lower). (3) Regular reflectance: Using a spectrophotometer (manufactured by Shimadzu Corporation), the regular reflectance at 15 ° incident light was measured. (4) Pencil hardness: according to JIS K5400. (5) Adhesion test: According to JIS K5400 grid tape method (1 mm gap).

From the results shown in Table 1, it can be seen that the non-glare sheet of the present invention is a non-glare sheet which is excellent in hard coat properties, has higher transmitted image clarity and lower regular reflectance than the comparative example.

[0037]

According to the present invention, there is provided a non-glare layer comprising a cured film of an energy ray-curable resin composition on a transparent film. A non-glare sheet of up to 70%, and by using this sheet on the front surface of an image display device such as a liquid crystal display device, a plasma display device, or a CRT display device, the image display surface is hardly scratched, and is clearer and easier to see. Images can be obtained. Further, by setting the specular reflectance of the spectrophotometer at 15 ° incident light to 1% or less, it is possible to obtain a non-glare sheet having high image clarity and less reflection of external light.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09F 9/00 318 G02B 1/10 A

Claims (15)

[Claims] A non-glare layer comprising a cured film of an energy ray-curable resin composition is provided on a transparent film, and the transmitted image sharpness in an image-definition measuring device is set to an optical comb width of 0.05.
Non-glare sheet which is 10 to 70% in mm. 2. The non-glare sheet according to claim 1, wherein the transmitted image clarity in the image clarity measuring device is 15 to 80% at an optical comb width of 0.125 mm. 3. The non-glare sheet according to claim 1, wherein the specular photometer has a regular reflectance of 1% or less at 15 ° incident light. 4. The non-glare layer comprises a cured film of an energy-ray-curable resin composition containing fine particles and a solvent-drying resin, and contains less than 10 parts by weight of fine particles based on 100 parts by weight of the energy-ray-curable resin composition. Claim 1
4. The non-glare sheet according to any one of items 3 to 3. 5. The non-glare sheet according to claim 4, wherein the average particle size of the fine particles is 0.5 to 1.5 μm by a Coulter counter method. 6. The non-glare sheet according to claim 5, wherein the standard deviation of the particle size of the fine particles by a Coulter counter method is 1.5 μm or less. 7. The solvent drying type resin is ethyl cellulose or hydroxypropyl cellulose.
Non-glare sheet according to any one of the above. 8. The non-glare sheet according to claim 1, wherein the energy ray-curable resin contains at least 40% by weight of a monomer having four or more (meth) acryloyl groups. 9. The non-glare sheet according to claim 1, wherein the average thickness of the non-glare layer is 2 to 10 μm. 10. The contact angle of water on the surface of the non-glare layer is 90.
The non-glare sheet according to any one of claims 1 to 9, wherein the angle is equal to or greater than 0 °. 11. The non-glare sheet according to claim 1, wherein a fluorine resin layer or a multilayer antireflection film is formed on the surface of the non-glare layer. 12. A polarizing plate comprising the non-glare sheet according to any one of claims 1 to 11. 13. An elliptically polarizing plate comprising the non-glare sheet according to claim 1. 14. An image display device comprising the non-glare sheet according to claim 1, a polarizing plate according to claim 12, or an elliptically polarizing plate according to claim 13. 15. The image display device according to claim 1, wherein the display device is a liquid crystal display device, a plasma display device, or a CRT display device.
4. The image display device of 4.