JP2000193804A - Glare-proof material and polarizing film using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a distinct image having no glaring without impairing a reflection preventing property or image contrast by providing a roughened surface layer in which filler is dispersed at least in the resin matrix on a transparent base, and setting difference of the refractive index of the resin matrix and the filler to a specific value. SOLUTION: Directly or through another layer on one face or both faces of a transparent base 11, a roughened surface layer 12 in which filler is dispersed at least in resin matrix is constituted to form a glare-proof material 10. In this case, difference of the refractive indexes of the resin matrix and the filler is set to under 0.10. For the transparent base body 11 used for the glareproof material 10, a transparent film, glass, or the like is mentioned. As a concrete example, various resins such as polyethylene terephthalate or polyethylene naphthalate and glass base material such as quartz glass or soda glass are mentioned. The higher the transparency of the transparent base 11, the better it is, but the light transmittance is not less than 80%, desirably not less than 90%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display (LCD), a plasma display (PDP), and a CR.
It is preferably used for an image display such as T, EL, etc. In particular, it has excellent anti-glare properties such as prevention of image glare and improvement of contrast, and also has excellent chemical resistance and abrasion resistance. The present invention relates to a glare material and a polarizing film using the same.

[0002]

2. Description of the Related Art Image display devices represented by LCDs, PDPs, CRTs, and ELs (hereinafter referred to as "displays") are widely used in various fields including televisions and computers, and have remarkable developments. Has achieved. In recent years, in the development of displays, efforts have been focused on higher definition of images, higher image quality, lower power consumption, and the like. These displays, which play an important role of the man-machine interface, are expected to become more widespread with the arrival of the multimedia age.
It is expected that the spread of S and other various types of mobile terminals will significantly increase. These display surfaces are subjected to some anti-reflection treatment to prevent reflection of external light. For example, in LCDs, a display surface is roughened, and light is scattered or diffused, and an image is blurred. Conventionally, the surface is roughened by a method such as a sand blast method or an emboss method, a method of providing a coating layer containing a filler, or a method of forming a porous film having a sea-island structure. The method of forming is adopted.

On the other hand, a display surface having irregularities on the surface has a problem that an image is glaring due to the relationship between the irregularity pitch of the roughened layer and the higher definition and higher image quality of the display. The high definition of the display is due to the high integration of pixels. However, when the interval between the irregularities is larger than the pixel pitch, glare occurs due to interference. In order to prevent glare, it is necessary to make the height and spacing of the irregularities of the roughened layer dense and to control the irregularities to be uniform over the entire surface. In order to form such a uniform surface-roughened layer, the particle size and content of the filler are focused on the method of providing a coating layer containing a filler among the above-described methods of surface roughening. Control methods have been proposed. As the resin used for such a coating agent, those having excellent permeability, heat resistance, abrasion resistance, chemical resistance, etc. are desirable, but the base material may be a highly transparent plastic film having poor heat resistance. Because there are many
As the resin, a UV curable resin is preferably used.
Examples thereof include JP-A-1-105738 and JP-A-5-1622 which use a UV-curable resin and a silica pigment as constituent elements.
No. 61 has been reported.

However, a roughened layer composed of a UV-curable resin and a silica pigment is applied to a substrate after a coating material is applied thereto.
Until irradiation, the filler in the roughened layer adheres to each other and aggregates (orange peel) due to a low-viscosity liquid state. When the content of the filler is increased to densify the irregularities on the surface of the roughened layer, or when the paint of the roughened layer is diluted with a solvent or the like in order to control the thickness of the roughened layer, it is particularly remarkable. ,
Along with the high definition of the display, the glare was also remarkable. Moreover, on the surface of the roughened layer made of UV resin and silica, light interference easily occurs between the convex portion of the silica and the concave portion of the resin, and there is a problem that interference fringes are generated. Further, as a display for a portable terminal, LC having characteristics such as light weight, compactness, and versatility is used.
Although D is considered to dominate the market, these portable terminals are equipped with a touch panel, and those that can be directly operated with a plastic pen or finger have become mainstream. Therefore, in addition to the above-described antireflection properties, demands for abrasion resistance and chemical resistance on the display surface are increasing.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances in the prior art, that is, an object of the present invention is to reflect external light such as sunlight and fluorescent light on a display. Excellent anti-reflection properties and excellent anti-glare properties that can provide clear images without glare without lowering image contrast, and excellent abrasion resistance and chemical resistance Indicating the display,
In particular, it is to provide an antiglare material suitable for a full-color liquid crystal display. Another object of the present invention is to provide a polarizing film using the antiglare material.

[0006]

The anti-glare material of the present invention comprises a roughened layer having a filler dispersed in at least a resin matrix on one or both sides of a transparent substrate, directly or via another layer. Wherein the difference in the refractive index between the resin matrix and the filler is 0.10 or less. Further, the polarizing film of the present invention is provided with a surface roughening layer in which a filler is dispersed in at least a resin matrix, directly or via another layer, on one surface of the transparent substrate. And a protective material laminated on a surface opposite to the functionalized layer via a polarizing substrate, wherein the difference in the refractive index between the resin matrix and the filler is 0.10 or less.

[0007]

Embodiments of the present invention will be described below in detail. As the transparent substrate used for the antiglare material of the present invention, a transparent film, glass, or the like can be used. Specific examples thereof include polyethylene terephthalate (PET) and polyethylene naphthalate (PE).
N), triacetyl cellulose (TAC), polyarylate, polyimide, polyether, polycarbonate,
Various resin films such as polysulfone, polyether sulfone, cellophane, aromatic polyamide, polyethylene, polypropylene, and polyvinyl alcohol, and glass substrates such as quartz glass and soda glass can be suitably used. When used for PDP and LCD, PET and TAC are preferred.

The higher the transparency of these transparent substrates, the better, but the light transmittance (JIS C-6714) is 80% or more, more preferably 90% or more. When the transparent substrate is used for a small and lightweight liquid crystal display, the transparent substrate is more preferably a film. Regarding the thickness of the transparent substrate, thinner is desirable from the viewpoint of weight reduction, but considering its productivity,
It is suitable to use one having a range of 1 to 700 µm, preferably 25 to 250 µm. Also, on a transparent substrate,
Performing a surface treatment such as an alkali treatment, a corona treatment, a plasma treatment, a fluorine treatment, a sputtering treatment, a surfactant, a silane coupling agent or the like, or a surface modification treatment such as Si vapor deposition is performed on the roughened layer. It is preferable from the viewpoint of improving the adhesion to the transparent substrate.

Further, an antistatic layer may be provided on the transparent substrate in order to prevent dirt such as dust electrostatically adhering to the display surface. The antistatic layer is formed by depositing a metal oxide film such as aluminum or tin or a metal oxide film such as ITO by vapor deposition or sputtering, etc .; metal fine particles such as aluminum, tin, etc .; metal oxides such as whisker or tin oxide; , Whiskers, 7, 7,
A charge transfer complex formed between 8,8-tetracyanoquinodimethane and an electron donor (donor) such as a metal ion or an organic cation is dispersed in a polyester resin, an acrylic resin, an epoxy resin, or the like. Alternatively, it can be provided by a method of providing by solvent coating or the like, or a method of providing polypyrrole, polyaniline or the like doped with camphorsulfonic acid or the like by solvent coating or the like. The transmittance of the antistatic layer is preferably 80% or more for optical applications.

Next, the resin matrix constituting the roughened layer of the present invention will be described. As the resin matrix constituting the roughened layer of the present invention, a resin that is cured by ultraviolet rays, electron beams, heat, or a combination thereof is used. UV or electron beam curable resins include acryloyl groups, methacryloyl groups, acryloyloxy groups,
A composition in which monomers, oligomers, and prepolymers having a polymerizable unsaturated bond such as a methacryloyloxy group are appropriately mixed is used. Examples of monomers include styrene, methyl acrylate, methyl methacrylate, methoxypolyethylene methacrylate, cyclohexyl methacrylate, phenoxyethyl methacrylate, ethylene glycol dimethacrylate, dipentaerythritol hexaacrylate, trimethylolpropane trimethacrylate, and the like. Oligomers and prepolymers include acrylates such as polyester acrylate, polyurethane acrylate, epoxy acrylate, polyether acrylate, Arkitt acrylate, melamine acrylate, and silicon acrylate;
Unsaturated polyesters, epoxy resins and the like can be mentioned. These may be used alone or in combination. When the flexibility of the cured film is required, the content of the monomer in the composition is preferably as small as possible. In order to further reduce the crosslink density, a monofunctional or bifunctional acrylate monomer is used. Is preferred. Conversely, when the cured film is required to have severe durability such as heat resistance, abrasion resistance, and solvent resistance, it is preferable to increase the content of the monomer as much as possible. It is preferred to use.

Among the ultraviolet or electron beam curable resins, urethane (meth) acrylate compounds represented by the following formulas (1) and (2) are particularly suitable for adhesion to a substrate, abrasion resistance,
It is preferable because of its excellent chemical resistance. Hereinafter, these compounds will be described.

Embedded image (Wherein, R ₁ is a hydrogen atom or CH ₃ , R ₂ is a polyhydric alcohol residue, X is an isocyanate residue, Y is a polyhydric alcohol residue. K is an integer of 1 to 5, l is 1 to 1) An integer of 3,
m represents an integer of 1 to 2, and n represents an integer of 1 to 6. Where k
And l, k, m and n are not 1 at the same time. )

The urethane (meth) acrylate compound of the formula (1) is a reaction product of a hydroxyl group-containing (meth) acrylate compound and an isocyanate compound, and is a compound having at least two (meth) acrylate groups. The urethane (meth) acrylate compound of the formula (2) is a reaction product of a hydroxyl group-containing (meth) acrylate compound, a polyisocyanate compound and a polyol compound, and is a compound having at least two (meth) acrylate groups. . As a method for obtaining the urethane (meth) acrylate, any known method can be used.

The hydroxyl group-containing (meth) acrylate compound includes glycerin (meth) acrylate, trimethylol (meth) acrylate, pentaerythritol (meth) acrylate, glycerin di (meth) acrylate, trimethylolpropane di (meth) acrylate,
Examples thereof include pentaerythritol tri (meth) acrylate, ditrimethylolpropane tri (meth) acrylate, and dipentaerythritol penta (meth) acrylate. These can be used alone or in combination of two or more.

Examples of the isocyanate compound include o-tolyl isocyanate, p-tolyl isocyanate, and 4-diphenylmethane isocyanate, and polyisocyanates such as 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, and 4,4-diphenylmethane diisocyanate. m-xylylene diisocyanate, p
-Xylylene diisocyanate, tetramethyl xylylene diisocyanate, biphenylene diisocyanate,
1,5-naphthylene diisocyanate, o-tolidine diisocyanate, hexamethylene diisocyanate,
Examples thereof include 4,4′-methylenebiscyclohexyl isocyanate, isophorone diisocyanate, trimethylhexamethylene diisocyanate, 1,3- (isocyanatomethyl) cyclohexane, and polycondensates such as burettes and nullates thereof.
These can be used alone or in combination of two or more. Particularly preferably, tolylene diisocyanate,
Nullated products of xylylene diisocyanate and hexamethylene diisocyanate, and nullified products of isophorone diisocyanate.

Examples of the polyol compound include aliphatic polyhydric alcohols such as ethylene glycol, propylene glycol, neopentyl glycol, 1,6-hexanediol, glycerin, trimethylolpropane, and carboxylic acid-containing polyols, ethylene oxide of various bisphenols and propylene. Aromatic polyhydric alcohols such as oxide reactants, ethylene oxide and propylene oxide reactants of bisphenolfluorene, and (meth) acryloyl in a molecule represented by the formula (2) irrespective of aliphatic or aromatic And a polyol having a group. Particularly preferably, dimethylolpropionic acid,
Dimethylolbutanoic acid, bisphenoxyethanolfluorene and the like.

In order to cure the ultraviolet or electron beam-curable resin as described above, it is sufficient to irradiate with an ultraviolet or electron beam, but if necessary, a polymerization initiator can be appropriately added. As the polymerization initiator, heat, or visible light,
Any material that generates active radicals by energy rays such as ultraviolet rays can be used without particular limitation. Examples of polymerization initiators that generate active radicals by heat include 2,2.
Examples include azo compounds such as 2′-azobis (2,4-dimethylvaleronitrile) and organic peroxides such as benzoyl peroxide and lauroyl peroxide. Examples of the polymerization initiator that generates an active radical by energy rays include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one,
Acetophenones such as benzyldimethyl ketal, 1-hydroxycyclohexyl-phenyl ketone, 2-methyl-2-morpholino (4-thiomethylphenyl) propan-1-one, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether,
Benzoin ethers such as benzoin isobutyl ether, benzophenone, o-benzoyl methyl benzoate,
4-phenylbenzophenone, 4-benzoyl-4'-
Methyl-diphenyl sulfide, 4-benzoyl-
Benzophenones such as N, N-dimethyl-N- [2- (1-oxo-2-propenyloxy) ethyl] benzenemethanaminium bromide, (4-benzoylbenzyl) trimethylammonium chloride, 2,4-diethylthioxanthone, Thioxanthones such as 1-chloro-4-dichlorothioxanthone, 2,4,6-trimethylbenzoyldiphenylbenzoyl oxide and the like can be mentioned. These can be used alone or in combination of two or more. Further, as an accelerator (sensitizer), N,
Amine compounds such as N-dimethylparatoluidine and 4,4'-diethylaminobenzophenone can be mixed and used. The content of the photoinitiator is preferably in the range of 0.1 to 10% by weight based on the UV-curable resin component.
If the amount is larger or smaller than the above range, the curing becomes worse.

In the case where the roughened layer is formed on a TAC film, an ultraviolet curable resin containing at least an epoxy compound as an ultraviolet or electron beam curable resin, and a cationic polymerization initiator as a photopolymerization initiator. Mold resins are particularly preferred for the following reasons. Less oxygen inhibition. Very little cure shrinkage. Excellent adhesion to transparent substrates. The transparent substrate has good adhesion to any of the above-mentioned ones. Among them, T.sub.
It also has excellent adhesion to AC films and especially TAC films that have been saponified. Good adhesion to the saponified TAC has the following advantages. That is, usually, when a polarizing film is produced, it is necessary to saponify the TAC film in advance in order to improve the adhesion between the polarizing substrate and the TAC film.
Generally done. When a saponification treatment is performed using a TAC film having a filler-containing type roughening layer on one side, a surface modifier such as a surfactant internally added to the roughening layer for the purpose of preventing contamination is obtained. There was a problem that elution was caused and optical characteristics such as antiglare properties were deteriorated. Saponification treatment T
These problems can be improved by improving the adhesion to AC. Excellent pigment dispersibility.

Examples of the epoxy compound include glycidyl ethers such as tetramethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, and bisphenol A diglycidyl ether;
Examples include epoxy esters such as 3-phenoxypropyl acrylate and bisphenol A-diepoxy-acrylic acid adducts, and monomers and oligomers such as alicyclic epoxy having the following chemical formula.

Embedded image

Examples of the cationic photopolymerization initiator include compounds having the following chemical formula.

Embedded image

Each of these may be used alone,
You may mix and use two or more. Also, viscosity, crosslink density,
In order to control the properties of the paint and the coating film such as heat resistance and chemical resistance, it is preferable to mix and use an ultraviolet-curable acrylate. Examples of the acrylate used in combination include lauryl acrylate, ethoxydiethylene glycol acrylate, methoxytriethylene glycol acrylate, phenoxyethyl acrylate, tetrahydrofurfuryl acrylate, isobornyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, Monofunctional acrylates such as -hydroxy-3-phenoxy acrylate, neopentyl glycol diacrylate, 1,6
-Acrylics such as polyfunctional acrylates such as hexanediol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol acrylate, dipentaerythritol hexaacrylate, trimethylolpropane acrylate benzoate, and trimethylolpropane benzoate. Acid derivatives, monofunctional methacrylates such as 2-ethylhexyl methacrylate, n-stearyl methacrylate, cyclohexyl methacrylate, tetrahydrofurfuryl methacrylate, 2-hydroxyethyl methacrylate, 2-hydroxybutyl methacrylate, 1,6 hexanediol dimethacrylate, and trimethylol Propane trimethacrylate, glycerin dimethacrylate, etc. It can be mentioned methacrylic acid derivatives such as ability methacrylate, glycerol dimethacrylate hexamethylene diisocyanate, monomers and oligomers such as urethane acrylates such as pentaerythritol triacrylate hexamethylene diisocyanate.

The amount of the cationic photopolymerization initiator is 0.1 to 5.0% by weight based on the epoxy compound (the total amount of monomers, oligomers and prepolymers) as the main component.
Is desirable. Even if the amount is less than 0.1,
Even if it is more than 5.0, ultraviolet curing is insufficient. The volume shrinkage rate (calculated by the following method) accompanying the curing of the roughened layer using the ultraviolet or electron beam curable resin is desirably 20% or less. When the volumetric shrinkage is more than 20%, curling becomes remarkable when the transparent substrate is a film, and when the substrate is a rigid material such as glass, the adhesion of the roughened layer is reduced. Volume shrinkage: D = (S−S ′) / S × 100 S: Specific gravity before curing S ′: Specific gravity after curing The specific gravity is measured by the method B (pycnometer method) of JIS K-7112. For ultraviolet or electron beam curable resin,
Stabilizers (thermal polymerization inhibitors) such as hydroquinone, p-benzoquinone and t-butylhydroquinone may be added. The addition amount is preferably in the range of 0.1 to 5.0% by weight with respect to the curable resin because there is no possibility of inhibiting the curing.

As the thermosetting resin, a phenol resin,
Furan resin, xylene / formaldehyde resin, ketone / formaldehyde resin, urea resin, melamine resin,
An aniline resin, an alkyd resin, an unsaturated polyester resin, an epoxy resin and the like can be mentioned. These may be used alone or in combination. When the transparent substrate is a plastic film, the thermosetting temperature cannot be set high. In particular, when using PET or TAC, it is desirable that the thermosetting resin used can be cured at 100 ° C. or lower. The higher the transparency of the ultraviolet ray or electron beam curable resin and the thermosetting resin used for the surface roughening layer of the present invention, the better, and the light transmittance (JIS C-6714) is 80% or more, like the transparent substrate. Preferably, 90% or more is preferable.

In the resin matrix, a leveling agent such as silicone oil, dicarboxylic acid, higher saturated fatty acid amine, higher unsaturated fatty acid amine, higher saturated fatty acid amide, higher unsaturated fatty acid amide, saturated higher fatty acid, higher unsaturated fatty acid, Curing agents such as metal salts of higher saturated fatty acids, metal salts of higher unsaturated fatty acids, saturated polybasic acids, unsaturated polybasic acids, polyethylene wax, higher alcohols, esters composed of higher alcohols and higher fatty acids, oils and fats such as bisamides, and isocyanates , Synthetic mica, zinc oxide, zirconium oxide, cesium oxide, silica, calcium carbonate, aluminum hydroxide, magnesium hydroxide, magnesium fluoride, clay, talc, titanium dioxide and other inorganic white pigments, acrylic resin, polystyrene resin, polyethylene Resin, epoxy resin, 50nm The following ultrafine particles of the transparent or white pigments such silicon resins organic, preferably 30
Ultrafine particles having a particle size of not more than nm, the aforementioned antistatic agent, viscosity modifiers such as cellulose acetate and nitrocellulose, and various additives such as surfactants can be appropriately selected and used. When adding a pigment, it is desirable to use a colloidal solution. If the pigment is secondary-aggregated in the transparent matrix, the transparency becomes worse due to internal scattering. Therefore, the surface of the pigment is treated with a silicate compound or a titanate compound, the surface is modified by a plasma treatment or the like, or an electron transfer complex is used. It is desirable to add a dispersant.

The higher the transparency of the resin matrix after adding various additives, the better, and the light transmittance (JIS C-
6714) is 70% or more, preferably 85% or more, like the transparent substrate. In the present invention, the transparency of the resin matrix is determined by its refractive index (JIS K-714).
2A method). Refractive index is 1.40 to 1.65
Is preferable. Particularly preferably, 1.45 to 1.5
A range of 5 is good. The refractive index of the resin matrix is determined by the refractive indexes of the resin and additives used in the resin matrix and the composition thereof. It is necessary to adjust so as to fall within the above range, but in this case, the compounding amount of the additive is the total solid content concentration,
It is desirable to set it to 40% or less. If it exceeds 40%,
Durability such as abrasion resistance and chemical resistance of the roughened layer is deteriorated.

In the present invention, by including a filler having a small difference in refractive index from the resin matrix in the above resin matrix, the surface can be roughened and an excellent antiglare effect can be provided. That is, either the refractive index of the filler or the refractive index of the resin matrix may be larger, but the closer they are, the more desirable. The difference in the refractive index between the filler and the transparent matrix needs to be 0.10 or less, and preferably 0.05 or less. When the difference in the refractive index exceeds 0.10, internal scattering increases, transparency is impaired, and glare (moire) becomes very noticeable. The refractive index of the resin matrix and the filler is not particularly limited as long as the difference is 0.10 or less as described above, but the refractive index of the resin matrix and the filler is 1.40 to 1.60. Are preferable in terms of optical properties such as anti-glare properties and anti-reflection properties in view of the relationship with the refractive index of the transparent substrate. Particularly, those materials having a refractive index in the range of 1.45 to 1.53 are excellent in optical properties. It is suitable. In addition, the refractive index of the resin matrix and the filler is JIS K-7.
142.

As the filler as described above, zinc oxide,
Inorganic white pigments such as zirconium oxide, cesium oxide, silica, calcium carbonate, aluminum hydroxide, magnesium hydroxide, magnesium fluoride, clay, talc, titanium dioxide, acrylic resin, polystyrene resin, polyethylene resin, epoxy resin, silicone resin An organic transparent or white pigment or the like can be used. Among them, spherical silica and organic pigments are preferred.

As the organic pigment, crosslinked acrylic beads are particularly preferable as a filler having a refractive index in the above-mentioned range. As the crosslinked acrylic beads, an acrylic monomer such as acrylic acid and its ester, methacrylic acid and its ester, acrylamide, acrylonitrile and the like, a polymerization initiator such as persulfuric acid, and a crosslinking agent such as ethylene glycol dimethacrylate are used. Crosslinked acrylic beads comprising a polymer and a copolymer obtained by polymerization by a method such as a synthesis method can be suitably used. Particularly, a polymer using methyl methacrylate as an acrylic monomer component is preferable. The crosslinked acrylic beads obtained in this manner are spherical and do not exhibit lubricating properties. Therefore, when used in a roughened layer, excellent stain resistance can be exhibited. When the filler is aggregated in the transparent matrix, transparency is deteriorated due to internal scattering. In order to improve the dispersibility of the filler in the transparent matrix, the surface of the filler is surface-treated with a silicate compound or a titanate compound,
It is desirable to perform surface modification by plasma treatment or the like, and further to add a dispersant such as an electron transfer complex.

The particle size and particle size distribution of the filler are important for precisely controlling the irregularities on the surface of the roughened layer. The particle diameter D (JIS B9921) of the filler is desirably 15.0 μm or less.
60% by weight or more in the range of 0.5 ≦ D ≦ 6.0 μm, less than 30% by weight in the range of 6.0 <D ≦ 10.0 μm, and in the range of 10 <D ≦ 15.0 μm. Is desirably 5% by weight or less. Especially 0.5 ≦ D ≦
80% by weight or more in the range of 6.0 μm, 6.0 <D
<10% by weight in the range of ≦ 10.0 μm, 10 <
It is preferable not to include those in the range of D ≦ 15.0 μm at all. When the weight% of the filler in the range of 0.5 ≦ D ≦ 6.0 μm is less than 60%, the anti-glare effect of the display becomes worse when the number of particles less than 0.5 μm increases, and conversely, the one having a particle size of 15 μm or more is If it increases, glare may occur. In addition, the filler in the range of 6.0 <D ≦ 10.0 μm contains 30% by weight or more, or 10 <D ≦ 1.
When the amount of the filler in the range of 5.0 μm is 5% by weight or more, glare tends to occur in the display image.
The amount of the filler is preferably in the range of 0.5 to 30% by weight based on the total solid content in the roughened layer. Especially 1-1
A range of 5% by weight is preferred. When the amount is less than 0.5% by weight, the antiglare effect becomes insufficient, and when the amount exceeds 30% by weight, durability such as abrasion resistance and environmental resistance deteriorates.

As a method of forming the roughened layer of the present invention, for example, a filler such as cross-linked acrylic beads may be added to a resin which is cured by any of the above-mentioned ultraviolet rays, electron beams, heat or a combination thereof. And paint or ink dispersed with water or an organic solvent by a paint shaker, sand mill, pearl mill, ball mill, attritor, roll mill, high-speed impeller disperser, jet mill, high-speed impact mill, ultrasonic disperser, etc. Doctor coating, blade coating, knife coating, reverse coating, transfer roll coating, gravure roll coating, kiss coating, cast coating, spray coating, slot orifice coating, calendar coating, electrodeposition Printing, dip coating, die coating, etc., letterpress printing such as flexographic printing, intaglio printing such as direct gravure printing, offset gravure printing, planographic printing such as offset printing, stencil printing such as screen printing, etc. On one or both sides of the material, directly or through another layer,
Provide a single layer or multiple layers, and when containing a solvent, harden the coating layer or printing layer by ultraviolet ray (in the case of ultraviolet ray, a photoinitiator is required) or electron beam irradiation after a heat drying process And the like.
In the case of using an electron beam, the energy of 50 to 1000 KeV emitted from various electron beam accelerators such as Cockloft-Walton type, Bande graph type, Resonant transformation type, Insulating core transformer type, Linear type, Dynamitron type and High frequency type. In the case of ultraviolet rays, ultraviolet rays emitted from rays such as an ultrahigh-pressure mercury lamp, a high-pressure mercury lamp, a low-pressure mercury lamp, a carbon arc, a xenon arc, and a metal halide lamp can be used. In order to improve the coating suitability or printing suitability of paints and inks, various additives to the resin matrix described above can be used as needed.

In the present invention, by controlling the particle size and particle size distribution of the filler in the roughened layer and the forming conditions such as the thickness of the roughened layer, more excellent optical characteristics of the roughened layer are obtained. It is possible to adopt a surface form that gives The thickness of the roughened layer is in the range of 0.5 to 10 μm, preferably in the range of 1 to 5 μm. 0.5 μm roughened layer
If it is thinner, the abrasion resistance of the roughened layer will deteriorate,
In the case of using an ultraviolet curable resin, for example, curing failure occurs due to oxygen inhibition. When the thickness is more than 10 μm, curling may occur due to curing shrinkage of the resin, microcracks may occur in the roughened layer, and adhesion to the transparent substrate may be reduced. Surface roughness of the roughened layer (JIS B06
01) is Ra (center line average roughness) 0.03 ≦ Ra ≦
0.30, 2 ≦ Sm ≦ 50 (average interval of unevenness) is desirable. If Ra and Sm are out of this range, the anti-glare property is deteriorated, and the image tends to be glaring.

On the roughened layer of the present invention, it is possible to provide an antireflection film composed of a single layer or a plurality of layers whose refractive index is adjusted. By providing the antireflection film, the image contrast is remarkably improved, and good image quality can be obtained. The antireflection film has a higher antireflection effect on the surface of a plurality of layers than a single layer, so that better image quality can be obtained. The single-layer antireflection film is obtained by providing a layer having a lower refractive index than the roughened layer, and the antireflection film composed of a plurality of layers includes a layer having a larger refractive index than the roughened layer and a roughened layer. One set of layers having a lower refractive index is provided, and one set or two or more sets are laminated. In this case, it is necessary in order to achieve excellent antireflection properties to sequentially provide layers having a small refractive index, which are the outermost surface layers, so that the refractive index of the layers becomes small. Materials used for such a layer having a small refractive index include MgF and SiO ₂ , and materials used for a layer having a large refractive index include TiO ₂ and ZrO ₂ . Usually, these materials are formed by a vapor phase method such as vapor deposition or sputtering, a sol-gel method, or a coating method of these materials, and roll coating or printing.

The antiglare material of the present invention thus produced preferably has a HAZE value in the range of 3 to 30 according to JIS K7105. In this case, the HAZE value is 3
If it is less than 30, the anti-glare property is poor, while if it is more than 30, the image contrast is poor, and the visibility is poor,
It is not preferable because the function of the display is deteriorated. The HAZE value means the haze value. The diffuse transmittance (Hd%) and the total light transmittance (Ht%) are measured using an integrating sphere light transmittance measuring device, and the following equation is obtained. Is calculated. HAZE value = Hd / Ht × 100

The polarizing film of the present invention is provided on one side of a transparent substrate with a roughened layer in which a filler is dispersed in at least a resin matrix, directly or via another layer. It has a configuration in which a protective material is laminated via a polarizing substrate on the surface opposite to the surface layer, and the difference in the refractive index between the resin matrix and the filler is 0.10 or less. The polarizing substrate of the present invention is made of a material capable of forming a transparent film, and specifically, polyvinyl alcohol, polyvinylene, or the like can be used. As the polarizing substrate, a film obtained by stretching the above-mentioned material can be used. For example, polyvinyl alcohol (PVA) obtained by uniaxially stretching polyvinyl alcohol adsorbing iodine or a dye as a dichroic element It is preferable to use a film. A polarizing substrate having a thickness of 10 to 80 μm is used.

Specifically, the PVA film is stretched about 3 to 4 times in the uniaxial direction, and P is stretched in higher-order iodine ions.
The polarizing substrate obtained by impregnating the VA film is coated on both sides with a polyester-based adhesive, a polyacryl-based adhesive, a polyurethane-based adhesive, a polyvinyl acetate-based adhesive, etc. It is preferable to use a transparent substrate having a protective layer and a protective material laminated on the other surface. The PVA film obtained above has a defect that it is easily broken due to lack of strength and the like, and has a large shrinkage ratio with respect to a change in humidity. Therefore, protective materials are laminated on both sides of the polarizing substrate. You. In this case, the transparent substrate has a function as a protective material on one surface, and a film of a transparent polymer compound, for example, a cellulose-based film such as triacetyl cellulose, a polyester film, a polycarbonate film as a protective material on the other surface. Etc. are used. Among them, triacetyl cellulose is particularly preferred. The thickness of the film is 10 to 2
000 μm is preferred. Further, it is preferable to improve the water resistance of the films by using a gelling agent such as boric acid, or by performing a heat treatment or formalization on these films. Further, in order to improve the adhesion with the polarizing substrate, the critical surface tension of the bonding surface with the polarizing substrate is set to 50.
It is preferable to perform a surface treatment such as a saponification treatment or a corona treatment so as to have a dyne / cm or more. It should be noted that a transparent substrate having a roughened layer as a protective material may be used to form a laminated structure in which both surfaces of a polarizing film are sandwiched.

The following is a more detailed description with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing the configuration of an antiglare material comprising a transparent substrate of the present invention. One surface of the antiglare material shows that the above-described roughened layer and surface layer are sequentially formed. ing. In FIG. 1, the antiglare material 10 has a structure in which a transparent substrate 11 has a roughened layer 12 on one surface. FIG. 2 is a schematic cross-sectional view showing the structure of the polarizing film 20 of the present invention, in which a transparent substrate 21 having a roughened layer 22, that is, an anti-glare material 23
The polarizing substrate 24 is laminated on one side, and the protective material 2 is
5 has been formed. FIG. 3 shows a configuration of a liquid crystal display 30 in which the antiglare property is improved by the antiglare material of the present invention. The liquid crystal display 30 is formed by laminating a liquid crystal panel 31 on the upper surface and a back light source 32 such as a light guide plate (EL) or a lamp on the lower surface. As the liquid crystal panel 31, for example, a twisted nematic (TN) liquid crystal cell or the like can be used.

In the TN liquid crystal cell, an alignment film is formed by applying a polyimide solution on the transparent electrode surfaces 33 'and 34' of two glass substrates 33 and 34 having transparent electrodes having a desired pattern. , This is orientated by a rubbing operation,
Thereafter, a nematic liquid crystal 35 is injected between the substrates, and the periphery of the glass substrate is sealed with an epoxy resin or the like. The nematic liquid crystal is twist-aligned by 90 ° by the action of the alignment film. A polarizing film 36 having a roughened layer 22 shown in FIG. 2 is provided on the opposite side of the two glass substrates of the TN liquid crystal cell from the back light source, and a roughened layer is provided on the back light source side. The liquid crystal panel 31 is formed by affixing the polarizing film 37 having no polarization so that the polarization angles are twisted by 90 ° with respect to each other.

When a drive signal is applied to the transparent electrodes of the TN liquid crystal panel 31, an electric field is generated between the electrodes to which the signals are applied. At that time, due to the electronic anisotropy of the liquid crystal molecules,
Since the major axis of the liquid crystal molecules is parallel to the direction of the electric field, the optical rotatory power of the liquid crystal molecules is lost, and as a result, the light does not pass through the liquid crystal panel. The display of the image is recognized as visual information by contrast based on the difference in light transmission at this time. In the above liquid crystal display 30,
An image can be displayed by transmitting the light through the liquid crystal panel 31 and giving a contrast to a portion of the liquid crystal panel 31 where light is transmitted and a portion where light is not transmitted.

FIG. 4 is a sectional view showing the structure of another liquid crystal display using the antiglare material 10 of the present invention. In FIG. 4, a liquid crystal panel 41 includes two glass substrates 43 and 44 and a nematic liquid crystal 45 interposed therebetween, an upper polarizing film 46 having no roughening layer located outside the glass substrates, and a roughened surface. Anti-glare material 10 laminated on lower polarizing film 47 having no layer and upper polarizing film 47
It is composed of The liquid crystal display 40 is formed by laminating a liquid crystal panel 41 and a back light source 32 located on the lower surface thereof.

[0039]

EXAMPLES The present invention will be described with reference to examples. still,
“Parts” means “parts by weight” and “%” means “% by weight”. <Example 1> 50 parts of the following dispersion liquid obtained by dispersing a mixture of silica, a dispersant, and a solvent in a sand mill for 30 minutes, and 152 parts of the following base coating material were mixed, and the mixture was stirred for 15 minutes with a disper to produce a mixture. The roughened layer paint
Triacetylcellulose film (trade name: Fuji Tack U) which is a transparent substrate having a thickness of 80 μm and a transmittance of 92%
VD80, manufactured by Fuji Photo Film Co., Ltd., having a refractive index of 1.49).
After drying at 0 ° C for 2 minutes, UV lamp output 120w / cm
UV light irradiation at a irradiation distance (distance from the lamp center to the coating surface) of 10 cm and a processing speed (speed with respect to the UV lamp on the coating substrate side) of 5 m / min. The film was cured. In this way, a resin matrix having a thickness of 3.2 μm and a refractive index of 1.50 (the refractive index of the resin matrix was measured by applying and drying only the base paint. The same applies to the following Examples and Comparative Examples). A roughened layer was formed to obtain the antiglare material of the present invention. HA of anti-glare material
The ZE value was 10.5.

[Blending of Dispersion] 95 parts of silica (trade name: silosphere, refractive index 1.45, manufactured by Fuji Silysia Chemical Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 68% 6.0 μm <D ≦ 10.0 μm 29% 10.0 μm <D ≦ 15.0 μm 2% ・ Dispersant 5 parts (trade name: 1002B, manufactured by Soken Chemical Co., Ltd.) ・ Toluene 500 parts ・ Isopropyl alcohol 500 parts

[Compounding of base paint] 35 parts of acrylic compound dipentaerythritol triacrylate epoxy compound (trade name: celloxite 2021, manufactured by Daicel Chemical Industries, Ltd.) 35 parts photo radical initiator 3 Part (trade name: Irgacure # 184, manufactured by Ciba Specialty Chemical Co.)-Photocationic polymerization initiator 2 parts

Embedded image -Silica sol 67 parts (trade name: organo silica sol MIBK-ST, solid content 30%, manufactured by Nissan Chemical Co., Ltd.)-Isopropyl alcohol 10 parts

<Example 2> Example 1 was repeated except that the blending of the dispersion and the blending of the base paint were changed as follows, and the mixing amount of the base paint of the roughening layer paint was changed to 132 parts by 132 parts.
In the same manner as in the above, an antiglare material of the present invention was obtained. The thickness of the roughened layer was 2.6 μm, the refractive index of the resin matrix was 1.51, and the HAZE value of the antiglare material was 22.0. [Blending of dispersion] 95 parts of acrylic filler (trade name: MX300, refractive index 1.50, manufactured by Soken Chemical Co., Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 100% (particle size 3 5.0 ± 0.5 μm) 5 parts of dispersant (trade name: 1002B manufactured by Soken Chemical Co., Ltd.) 500 parts of toluene 500 parts of isopropyl alcohol

[Blending of base paint] 40 parts of acrylic compound (trade name: UA306H, manufactured by Kyoeisha Chemical Co., Ltd.) 20 parts of tetrapentaerythritol polyacrylate 20 parts of epoxy compound (trade name: Celloxite 2021, Daicel Chemical Industries, Ltd.) 5 parts of photo-radical initiator (trade name: Irgacure # 184, manufactured by Ciba Specialty Chemical Co.) 37 parts of silica sol (trade name: organosilica sol MIBK-ST, solid content 30%, manufactured by Nissan Chemical Co., Ltd.)・ Isopropyl alcohol 10 parts

<Example 3> Example 1 was repeated except that the dispersion of the surface-roughened layer and the base paint were changed to the following, and the mixing amount of the base paint of the paint for the surface-roughened layer was 142 parts. In the same manner as in the above, an antiglare material of the present invention was obtained. The thickness of the roughened layer was 2.8 μm, the refractive index of the resin matrix was 1.49, and the HAZE value of the antiglare material was 17.0. [Blending of Dispersion] Silica 20 parts (trade name: High Pressica FQ, refractive index 1.45, manufactured by Ube Nitto Kasei Co., Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 100% (Particle size: 1.0 ± 0.1 μm) ・ 75 parts of silica (trade name: silosphere, refractive index: 1.45, manufactured by Fuji Silysia Chemical Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 68% 6.0 μm <D ≦ 10.0 μm 29% 10.0 μm <D ≦ 15.0 μm 2% ・ Dispersant 5 parts ・ Toluene 500 parts ・ Isopropyl alcohol 500 parts

[Blending of base paint] ・ Acrylic compound 40 parts neopentyl glycol diacrylate ・ Acrylic compound 40 parts (trade name: UA515H, manufactured by Kyoeisha Chemical Co., Ltd.) ・ Photoradical initiator 5 parts (trade name: Irgacure # 184, manufactured by Ciba Specialty Chemical Co., Ltd. ・ Silica sol 47 parts (trade name: organosilica sol MIBK-ST, solid content 30%, manufactured by Nissan Chemical Co., Ltd.) ・ Isopropyl alcohol 10 parts

<Comparative Example 1> The dispersion and the base paint were changed as follows, and the mixed amount of the base paint of the paint for the roughened layer was 1
The same procedures as in Example 1 were carried out except that 52 parts were changed to 176 parts, the thickness of the roughened layer was 3.2 μm, and the refractive index of the resin matrix was 1.
56, a comparative antiglare material having a HAZE value of 15.0 for the antiglare material was obtained. [Blending of Dispersion] Silica 50 parts (trade name: UNK High Pressica FQ N3N, refractive index 1.40, manufactured by Ube Nitto Kasei Co., Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 100% ( Particle size 5 ± 0.5 μm ・ Silica 50 parts (trade name: UNK High Pressica FQ N3N, refractive index 1.40, manufactured by Ube Nitto Kasei Co., Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 100% (particle size 4 μm) ・ 1000 parts of isopropyl alcohol

[Blending of base paint] ・ Acrylic compound 40 parts Neopentyl glycol diacrylate ・ Acrylic compound 30 parts (trade name: UA515H, manufactured by Kyoeisha Chemical Co., Ltd.) ・ Photoradical initiator 6 parts (trade name: Irgacure # 1800, manufactured by Ciba Specialty Chemical Co., Ltd.)-100 parts of titania sol (trade name: CSK5, solid content 20%, manufactured by Ishihara Techno Co., Ltd.)

<Comparative Example 2> The dispersion and the base paint were changed as follows, and the mixing amount of the base paint of the roughening layer paint was 1
An antiglare material for comparison was prepared in the same manner as in Example 1 except that 52 parts was changed to 120 parts. The thickness of the roughened layer was 3.2 μm, the refractive index of the resin matrix was 1.60, and the HAZE value of the antiglare material was 35.0. [Blending of Dispersion] Silica 50 parts (trade name: UNK High Pressica FQ N3N, refractive index 1.40, manufactured by Ube Nitto Kasei Co., Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 100% ( Particle size 5 ± 0.5 μm ・ Silica 50 parts (trade name: UNK High Pressica FQ N3N, refractive index 1.40, manufactured by Ube Nitto Kasei Co., Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 100% (particle size 4 μm) ・ 1000 parts of isopropyl alcohol

[Blending of base paint] 14 parts of acrylic compound (trade name: Unidick 17-806, solid content concentration 80%, manufactured by Dainippon Ink and Chemicals, Inc.) 14 parts of acrylic compound (trade name: UA515H, manufactured by Kyoeisha Chemical Co., Ltd.-4 parts of photo radical initiator (trade name: Irgacure # 1800, manufactured by Ciba Specialty Chemical Co.)-88 parts of titania sol (trade name: CSK5, solid content 20%, manufactured by Ishihara Techno Co.)

Comparative Example 3 The same procedure as in Example 1 was carried out except that the blending of the dispersion liquid and the base paint was changed as follows, and the mixing amount of the base paint of the roughening layer paint was changed to 130 parts. Thus, an antiglare material for comparison was obtained. The thickness of the roughened layer was 3.3, the refractive index of the resin matrix was 1.53, and the HAZE value of the antiglare material was 1.5. [Blending of dispersion liquid] Silica 25 parts (trade name: UNK High Pressica FQ N3N, refractive index 1.40, manufactured by Ube Nitto Kasei Co., Ltd.) Particle size distribution (particle size D) 0.5 μm ≦ D ≦ 6.0 μm 100% ( Particle size: 5 ± 0.5 μm ・ Dispersant 5 parts (trade name: 1002B, manufactured by Soken Chemical Co., Ltd.) ・ Toluene 500 parts ・ Isopropyl alcohol 500 parts [Blending of base paint] ・ Acrylic resin 65 parts (Product Name: ADEKA OPTOMER KR-566, manufactured by Asahi Denka Kogyo Co., Ltd.)-65 parts of isopropyl alcohol

Using the anti-glare materials 10 obtained in Examples 1 to 3 and Comparative Examples 1 to 3, anti-glare properties, image glare, abrasion resistance,
The chemical resistance and the image contrast were evaluated. In addition,
Regarding the image contrast, a polarizing film 20 having the configuration shown in FIG.
The polarizing film 20 was attached to a glass substrate 33 as shown in FIG. The image size of the liquid crystal display 30 was, for example, 10.4 inches, and the resolution was, for example, 800 dots × 600 dots. In addition, the evaluation method is as follows. <Anti-glare property> Image clarity measuring device ICM- manufactured by Suga Test Instruments Co., Ltd.
Using 1DP (JIS K7105), in transmission mode,
It was measured with an optical comb width of 2 mm. The smaller the measured value, the higher the anti-glare property. In this case, less than 50% is ○, 50% or more, 7
Less than 0% was evaluated as Δ, and 70 or more was evaluated as x.

<Glare of Image> The anti-glare material 10 is shown in FIG.
And the anti-glare material is slowly rotated clockwise 360 times on the glass substrate 33 shown in FIG. When there is glare (moire), light streaks are generated on the screen, and the presence or absence and the degree of the streaks were visually evaluated. The case where there was no glare (moire) was evaluated as ○, and the case where there was glare was evaluated as x. <Abrasion resistance> Steel wool of Japan steel wool #
0000 was attached to a paperboard abrasion tester (manufactured by Kumagai Riki Kogyo Co., Ltd.), and the surface of the roughened layer of the antiglare material was subjected to a load of 200 g / cm ^2.
Reciprocate 50 times. Thereafter, the HAZE value of the portion was measured with a Haze meter manufactured by Toyo Seiki Co., Ltd., and a change in the haze value δH was determined. ΔH based on the following calculation is 1 for abrasion resistance.
Below, it is good, and when it exceeds 5, the number of scratches increases, which is a practical problem. The measurement of the HAZE value was performed using the antireflection material alone. HAZE value change δH = HAZE value after test-HAZE value before test

<Chemical resistance> The surface of the roughened layer is rubbed 50 times with a cotton swab (manufactured by Johnson Corporation) containing isopropyl alcohol. When there was a remarkable change such as peeling in the roughened layer, it was evaluated as x, when there was no change, as ○, and in the middle, as △. <Image contrast> JIS C7072 (198
8) Contrast ratio (CR) of liquid crystal display panel
The evaluation was performed according to the measurement method. FIG. 5 shows the positional relationship between the light source 60, the liquid crystal panel 61, and the photometer 62 in the evaluation of the image contrast. In this case, the light source 60 and the liquid crystal panel 61
Is set to, for example, 1 cm, the distance between the liquid crystal panel 61 and the photometer 62 is set to, for example, 50 cm, and the aperture angle of the photometer is set to, for example, 5 °. In addition, 5 W EL was used as a light source, and LS-100 manufactured by Minolta Camera Co., Ltd. was used as a photometer. CR
Is 3 or more, ○, 2 or more to less than 3 is Δ,
In the same, less than 2 was evaluated as x.

Table 1 shows the evaluation results.

[Table 1]

As is clear from the results shown in Table 1, the anti-glare materials of the present invention all exhibited good characteristics, while the comparative examples in which the difference in the refractive index between the resin matrix and the filler in the roughened layer was large. All of them have a problem of glare of images.

[0056]

The antiglare material of the present invention has a structure in which a surface roughening layer in which a filler is dispersed in a resin matrix is provided on one or both surfaces of a transparent substrate, directly or via another layer. Since the difference in the refractive index between the resin matrix and the filler is 0.10 or less, when applied to an image display such as a CRT or LCD, particularly when applied to a high-definition image display, there is no glare and high contrast. And a clear image can be obtained. Further, by selecting a resin which can be cured by ultraviolet rays, electron beams and / or heat for the surface-roughened layer and a filler having a specific particle size distribution, excellent chemical resistance, abrasion resistance, and anti-glare properties. Can be expressed. The polarizing film using the anti-glare material of the present invention has excellent anti-glare properties, has no glare, and can obtain a good image contrast, and thus is useful as an image display such as a liquid crystal panel. Further, by providing an antireflection film on the roughened layer, the image quality of the display can be further improved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a configuration of an antiglare material of the present invention.

FIG. 2 is a schematic cross-sectional view illustrating a configuration of a polarizing film using the antiglare material of the present invention.

FIG. 3 is a schematic cross-sectional view showing a configuration of a liquid crystal display having a polarizing film using an antiglare material.

FIG. 4 is a schematic sectional view showing the configuration of another liquid crystal display including a polarizing film using an antiglare material.

FIG. 5 is a schematic diagram showing a layout of an image contrast measuring device.

[Explanation of symbols]

Reference Signs List 10 anti-glare material, 11 transparent substrate, 12 roughened layer, 2
0 polarizing film, 21 transparent substrate, 22 roughened layer, 2
3 anti-glare material, 24 polarizing substrate, 25 protective material, 30
Liquid crystal display, 31 Liquid crystal panel, 32 Back light source, 3
3,34 glass base, 33 ', 34' transparent electrode surface,
35 Nematic liquid crystal, 36, 37 polarizing film, 4
0 liquid crystal display, 41 liquid crystal panel, 43,44 glass base, 45 nematic liquid crystal, 46,47 polarizing film, 60 light source, 61 liquid crystal panel, 62 photometer.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G02B 27/26 G09F 9/00 314 G09F 9/00 314 G02B 1/10 Z F-term (Reference) 2H042 BA02 BA03 BA13 BA20 2H049 BB63 BC22 BC24 2K009 AA12 BB02 BB11 BB24 CC03 CC14 CC21 CC23 CC24 CC33 CC34 DD02 DD05 EE00 EE03 4F100 AA20 AJ06 AK01B AK25 BA03 BA10B BA10C CA23B CC02 DE01B EH46 JEJBJJAJJBJJBJJBJJBJ10A AA02 AA14 BB12 BB15 CC12 DD12 EE26 EE33 FF05 GG22 HH02 HH03 KK07

Claims (3)

[Claims] 1. A transparent substrate having, on one or both sides thereof, a roughened layer in which a filler is dispersed at least in a resin matrix, directly or via another layer, and wherein the resin matrix and the filler An antiglare material having a difference in refractive index of 0.10 or less. 2. The particle size distribution of the particle diameter D of the filler is as follows:
60% by weight or more in the range of 0.5 ≦ D ≦ 6.0 μm, less than 30% by weight in the range of 6.0 <D ≦ 10.0 μm, and in the range of 10 <D ≦ 15.0 μm. The anti-glare material according to claim 1, wherein the content is 5% by weight or less. 3. A surface roughening layer in which a filler is dispersed at least in a resin matrix is provided on one surface of a transparent substrate directly or via another layer. A polarizing film having a configuration in which a protective material is laminated on an opposite surface via a polarizing substrate, and a difference in refractive index between the resin matrix and the filler is 0.10 or less.