KR20170040198A - Anti-glare film and image display device - Google Patents

Abstract

Provided is an antiglare film capable of suppressing flashing while maintaining flame retardancy and transparency.
The antiglare film of the present invention comprises a transparent base material and an antiglare layer disposed on at least one side of the transparent base material, wherein the surface of the antiglare layer opposite to the transparent base material is an irregular surface, The spacing Sm is from 150 mu m to 350 mu m, the average inclination angle &thetas; a of the uneven surface is 0.1 DEG to 2.5 DEG, and the arithmetic mean surface roughness Ra of the uneven surface is 0.05 mu m to 0.5 mu m.

Description

TECHNICAL FIELD [0001] The present invention relates to an antireflection film and an image display device,

The present invention relates to an antiglare film and an image display apparatus.

2. Description of the Related Art Conventionally, in an image display apparatus, an antiglare film is sometimes used for the purpose of preventing a decrease in contrast due to reflection of external light, image nonvisualization, or the like. In recent years, there has been a problem that flickering due to the antiglare film occurs due to the high definition of the image display device. Specifically, when the conventional antiglare film is applied to a fixed three-image display device, the luminance deviation existing in the pixel is emphasized, and the flashing is likely to occur.

As a technique for solving the above problem, there has been proposed a technique of increasing the internal haze of the antiglare film. However, in the related art, it is necessary to further increase the internal haze with the further required high-definition fineness, and there is a fear that it is not suitable for practical use from the viewpoint of transparency.

An image display apparatus having a structure in which a relatively thick glass or the like is disposed on the back side of the antiglare film, for example, an image display apparatus (for example, a car navigation monitor, an instrument panel monitor, The problem of the flashing becomes more remarkable.

As described above, in an image display apparatus requiring high definition and heat resistance, it is required to apply an anti-glare film which can suppress flashing while maintaining the retardation and transparency.

Japanese Laid-Open Patent Publication No. 2014-09456

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an image display apparatus which is required to have a high definition and a high heat resistance and which is capable of suppressing glare To provide a film.

The antiglare film of the present invention comprises a transparent substrate and an antiglare layer disposed on at least one surface of the transparent substrate, wherein the surface of the antiglare layer opposite to the transparent substrate is an irregular surface, An average spacing Sm of 150 mu m to 350 mu m, an average inclination angle &thetas; a of the uneven surface is 0.1 DEG to 2.5 DEG, and an arithmetic average surface roughness Ra of the uneven surface is 0.05 mu m to 0.5 mu m.

In one embodiment, the average spacing Sm of the irregularities on the irregular surface, the average inclination angle? A, and the arithmetic average surface roughness Ra of the irregular surface show a relationship of 0? Ra / Sm?? A 占 1000? .

In one embodiment, the antiglare layer contains a binder resin and particles, and the particles have a weight-average particle diameter of 1 탆 to 10 탆.

In one embodiment, the content of the particles is 1 part by weight to 9 parts by weight with respect to 100 parts by weight of the binder resin.

In one embodiment, the antiglare layer comprises a cohesive filler.

In one embodiment, the cohesive filler is an organic clay.

In one embodiment, the thickness of the antiglare layer is 3 mu m to 15 mu m.

In one embodiment, the antiglare film of the present invention is formed between the transparent substrate and the antiglare layer, and includes at least a part of the material constituting the transparent substrate and / or at least a part of the binder resin , And an intermediate layer, and the thickness of the intermediate layer is 0.1% to 123% with respect to the thickness of the antiglare layer.

According to another aspect of the present invention, an image display apparatus is provided. The image display apparatus includes the antiglare film and the image display cell, and the gap between the antiglare film and the image display cell is 100 占 퐉 to 700 占 퐉.

According to the present invention, there is provided an antiglare layer having an uneven surface, wherein the uneven surface has a specific average interval Sm, an average inclination angle? A, and an arithmetic mean surface roughness Ra so as to maintain flashing property and transparency, It is possible to provide an antiglare film which can be inhibited. Particularly, the antiglare film of the present invention is particularly useful in an image display apparatus requiring high definition and heat resistance.

1 is a schematic cross-sectional view of an antiglare film according to one embodiment of the present invention.
2 is a schematic cross-sectional view of an antiglare film according to another embodiment of the present invention.
3 is a schematic cross-sectional view of an image display apparatus according to one embodiment of the present invention.

A. Anticancer Film

1 is a schematic cross-sectional view of an antiglare film according to one embodiment of the present invention. This antiglare film (100) has a transparent substrate (10) and an antiglare layer (20) arranged on at least one side of the transparent substrate (10). Typically, the transparent substrate 10 is composed of a resin film. The antiglare layer 30 is typically formed by coating a resin film with a composition for forming an antiglare layer. The composition for forming an antiglare layer includes a binder resin (or a precursor of a binder resin) and particles, and the antiglare layer 30 formed from the composition for forming an antiglare layer includes a binder resin and particles. The surface of the antiglare layer 20 opposite to the transparent substrate 10 is an uneven surface and has a specific surface shape as described later. It should be noted that the sizes of the irregularities with respect to the thicknesses of the respective layers in the illustrated example are described differently from the actual ones in order to make them easy to see. Although not shown, the antiglare film may further include an antireflection layer on the side opposite to the transparent substrate of the antiglare layer. The antireflective layer may be formed by any suitable method.

2 is a schematic cross-sectional view of an antiglare film according to another embodiment of the present invention. This antiglare film 100 'has a transparent substrate 10 and an antiglare layer 30 disposed on at least one side of the transparent substrate 10 and is provided between the transparent substrate 10 and the antiglare layer 30 , And an intermediate layer (1) are formed. Typically, as described above, the transparent substrate 10 is formed of a resin film. The antiglare layer 30 is typically formed by coating a resin film with a composition for forming an antiglare layer. The composition for forming an antiglare layer includes a binder resin (or a precursor of a binder resin) and particles, and the antiglare layer 30 formed from the composition for forming an antiglare layer includes a binder resin and particles. Typically, the intermediate layer 1 is formed by penetrating a resin composition for forming an antiglare layer into the resin film. When the antiglare layer forming composition is applied to the resin film, the material constituting the resin film may be eluted into the composition for forming an antiglare layer. A portion where the material constituting the resin film is eluted as described above also corresponds to the intermediate layer (1). That is, the intermediate layer 1 may include at least a part of the material constituting the transparent substrate 10 and at least a part of the binder resin contained in the antiglare layer 30. [ The intermediate layer 1 may be a layer in which a material constituting the transparent substrate 10 and a binder resin contained in the antiglare layer 30 are commonly used. The intermediate layer 1 is a layer which is in contact with both the transparent substrate 10 and the antiglare layer 20.

The thickness of the antiglare film is preferably 15 탆 to 500 탆, more preferably 25 탆 to 300 탆, and still more preferably 30 탆 to 100 탆.

B. Visible layer

As described above, one surface of the antiglare layer is an uneven surface. The average spacing Sm of the irregularities is in the range of 150 mu m to 350 mu m, preferably 160 mu m to 300 mu m, and more preferably 180 mu m to 250 mu m.

The average inclination angle &thetas; a of the uneven surface is 0.1 DEG to 2.5 DEG, preferably 0.2 DEG to 2.0 DEG, and more preferably 0.3 DEG to 1.5 DEG.

The arithmetic average surface roughness Ra of the uneven surface is 0.05 mu m to 0.5 mu m, preferably 0.08 mu m to 0.3 mu m, and more preferably 0.1 mu m to 0.25 mu m.

The definition of the average spacing Sm, the average inclination angle? A, and the arithmetic surface roughness Ra of the uneven surfaces is based on JIS B 0601 (1994 edition). These characteristic values can be measured by a contact-type surface roughness measuring instrument (e.g., a high precision fine shape measuring instrument manufactured by Kosaka Laboratory, trade name " Surfcoder ET4000 "). The average inclination angle? A is a value defined by an equation? A = tan ^-1 ? A. ? A is the sum of the difference (height h) between the apex of the adjacent convex portion and the lowermost point of the concave portion in the roughness curve defined in JIS B 0601 (1994 edition) (h1 + h2 + h3 + ... + hn ) Minus the reference length L of the roughness curve, that is, Δa = (h1 + h2 + h3 + ···· + hn) / L.

The antiglare film of the present invention is provided with the antiglare layer having the above-described surface shape (mean spacing Sm of uneven surfaces, average inclination angle? A, and arithmetic surface roughness Ra), thereby suppressing flashing while maintaining excellent anti- can do. In particular, a relatively thick optical member (for example, a glass, a polarizing plate, and a retardation film) is disposed on the back surface of the antiglare film by setting all of the average spacing Sm, the average inclination angle? It is possible to obtain a glare suppressing effect even for an image display apparatus in which the distance between image display cells (e.g., liquid crystal cells) is long. The shape of the surface of the antiglare layer may be appropriately selected depending on, for example, the kind, particle size and / or content of particles contained in the antiglare layer, the relationship between the particle size of the antiglare layer and the particle, Can be controlled by the solid content concentration of the composition for forming.

Preferably, the average spacing Sm (占 퐉), the average inclination angle? A (占 and the arithmetic surface roughness Ra (占 퐉) of the uneven surfaces exhibit a relationship of 0? Ra / Sm 占? A 占 1000? 4, 0.1? Ra / Sm x? A x 1000? 3, and more preferably 0.15? Ra / Sm x? A x 1000? 2. The effect of the present invention becomes more remarkable by setting the relationship between the average spacing Sm (占 퐉), the average inclination angle? A (占 and the arithmetic surface roughness Ra (占 퐉)

The thickness of the antiglare layer is preferably 3 탆 to 15 탆, more preferably 4 탆 to 13 탆, and still more preferably 5 탆 to 12 탆. With such a range, it is possible to obtain an antiglare film which is difficult to impair the visibility of the image display apparatus. Further, by combining with the particles to be described later, the antiglare layer can be formed with a good concavo-convex shape.

The haze of the antiglare layer is preferably less than 40%, more preferably 35% or less, and still more preferably 10% to 30%. INDUSTRIAL APPLICABILITY According to the present invention, it is possible to obtain an antiglare film which does not deteriorate the transparency of the antiglare layer, that is, does not increase the haze of the antiglare layer, has excellent antiglare property and is excellent in anti-glare properties. The haze can be measured in accordance with JIS K 7136 (2000 edition).

The refractive index of the binder resin is preferably 1.2 to 2.0, more preferably 1.3 to 1.9, still more preferably 1.3 to 1.8, and particularly preferably 1.4 to 1.7. With such a range, it is possible to form an antiglare layer having a desirable external haze in relation to the refractive index (described later) of the particles. The "refractive index of the binder resin" refers to the refractive index of the region constituted of the binder resin in the antiglare layer, and corresponds to the refractive index of the antiglare layer on the assumption that no particles exist.

The antiglare layer preferably comprises a binder resin and particles. The antiglare layer is formed, for example, by applying a composition for forming an antiglare layer on a resin film constituting a transparent substrate, and then curing the composition. The composition for forming an antiglare layer may contain a curable compound, the above-mentioned particles, and the like.

The binder resin is a resin derived from a curable compound, and examples of the resin include a thermosetting resin and an active energy ray curable resin.

Preferably, the composition for forming an anti-glare layer comprises a curable compound as a main component, a polyfunctional monomer, an oligomer derived from a polyfunctional monomer, and / or a prepolymer derived from a polyfunctional monomer. Examples of the polyfunctional monomer include polyfunctional acrylic monomers. Specific examples include tricyclodecane dimethanol diacrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylol propane triacrylate, pentaerythritol tetra (meth) (Meth) acrylate, 1,6-hexanediol (meth) acrylate, 1,9-nonanediol acrylate, 1,10-decanediol (meth) acrylate (Meth) acrylate, ethoxylated glycerin triacrylate, ethoxylated pentaerythritol (meth) acrylate, dipropylene glycol diacrylate, isocyanuric acid tri (meth) acrylate, And lithol tetraacrylate. The multifunctional monomers may be used alone or in combination of a plurality of them.

The polyfunctional monomer may have a hydroxyl group. When the composition for forming an antiglare layer containing a polyfunctional monomer having a hydroxyl group is used, the adhesion between the transparent substrate and the antiglare layer can be improved. Examples of the polyfunctional monomer having a hydroxyl group include pentaerythritol tri (meth) acrylate and dipentaerythritol pentaacrylate.

The content ratio of the polyfunctional monomer, the oligomer derived from the polyfunctional monomer, and the prepolymer derived from the polyfunctional monomer is preferably 10% by weight to 100% by weight relative to the total amount of the monomer, oligomer and prepolymer in the composition for forming an antiglare layer , More preferably 30 wt% to 100 wt%, still more preferably 40 wt% to 95 wt%, and particularly preferably 50 wt% to 95 wt%.

The composition for forming an antiglare layer may further contain a monofunctional monomer. Examples of the monofunctional monomer include ethoxylated o-phenylphenol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, phenoxypolyethylene glycol (meth) acrylate, 2-ethylhexyl acrylate, 2-hydroxy-3-phenoxyacrylate, acryloylmorpholine, 2- (2-hydroxyethyl) acrylate, isohexyl acrylate, isooctyl acrylate, cyclohexyl acrylate, isophoronyl acrylate, benzyl acrylate, 2- Hydroxyethyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, hydroxyethyl acrylamide and the like.

The monofunctional monomer may have a hydroxyl group. Examples of the monofunctional monomer having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) (Meth) acrylate such as N- (2-hydroxyethyl) (meth) acrylamide, N-methylol (meth) acrylate ) Acrylamide and N- (2-hydroxyalkyl) (meth) acrylamide. Among them, 4-hydroxybutyl acrylate and N- (2-hydroxyethyl) acrylamide are preferable.

The composition for forming an antiglare layer may contain oligomers of urethane (meth) acrylate and / or urethane (meth) acrylate. The urethane (meth) acrylate can be obtained, for example, by reacting a hydroxy (meth) acrylate obtained from a (meth) acrylic acid or a (meth) acrylic acid ester and a polyol with a diisocyanate. The oligomers of urethane (meth) acrylate and urethane (meth) acrylate may be used alone, or a plurality of oligomers may be used in combination.

Examples of the (meth) acrylic acid esters include methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, cyclohexyl .

Examples of the polyol include polyhydric alcohols such as ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, diethylene glycol, dipropylene glycol, neopentyl glycol, 1,3-butanediol, 1,6-hexanediol, 1,9-nonanediol, 1,10-decanediol, 2,2,4-trimethyl-1,3-pentanediol, Ethylene oxide adduct bisphenol A, propylene oxide adduct bisphenol A, trimethylol ethane, trimethylol propane, glycerin, trimethylol propane, glycerin, 3-methylpentane-1,3,5-triol, pentaerythritol, dipentaerythritol, tripentaerythritol, glucose and the like.

As the diisocyanate, various diisocyanates such as aromatic, aliphatic or alicyclic groups can be used. Specific examples of the diisocyanate include tetramethylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 2,4-tolylene diisocyanate, 4,4-diphenyl diisocyanate, 1,5-naphthalene diisocyanate, 3 , 3-dimethyl-4,4-diphenyl diisocyanate, xylene diisocyanate, trimethylhexamethylene diisocyanate, 4,4-diphenylmethane diisocyanate, and hydrogenated products thereof.

As described above, the antiglare layer includes particles. By including the particles, the surface of the antiglare layer can be formed as an uneven surface. In addition, the haze value of the antiglare layer can be controlled. Examples of the particles include inorganic particles, organic particles, and the like. Specific examples of the inorganic particles include, for example, silicon oxide particles, titanium oxide particles, aluminum oxide particles, zinc oxide particles, tin oxide particles, calcium carbonate particles, barium sulfate particles, talc particles, kaolin particles, calcium sulfate particles . Specific examples of the organic particles include, for example, polymethyl methacrylate resin particles (PMMA particles), silicone resin particles, polystyrene resin particles, polycarbonate resin particles, acrylic styrene resin particles, benzoguanamine resin particles, melamine resin Particles, polyolefin resin particles, polyester resin particles, polyamide resin particles, polyimide resin particles, and polyfluorinated ethylene resin particles. The particles may be used singly or in combination.

The weight average particle diameter of the particles is preferably 1 to 10 占 퐉, more preferably 2 to 7 占 퐉. With such a range, it is possible to obtain a retardation film excellent in the retardation and capable of preventing white blur. The weight average particle diameter of the particles can be measured by the Coulter count method. In the composition for forming the antiglare layer or the antiglare layer, the particles may exist in the form of primary particles and / or aggregated primary particles, but in the present specification, " weight average particle diameter of particles " Means the weight average particle size measured by the Coulter count method for the particles in the composition for forming an antiglare layer regardless of the particle shape.

The ratio of the thickness of the antiglare layer to the weight average particle diameter of the particles (weight average particle diameter of particles / thickness of the antiglare layer) is preferably 0.3 to 0.9, more preferably 0.35 to 0.8. With such a range, the antiglare layer having a greater anti-glare effect can be formed.

The refractive index of the particles is preferably 1.1 to 1.9, more preferably 1.2 to 1.7. Examples of the particles having such a refractive index include silicon particles, polystyrene particles, polymethylmethacrylate, copolymers of styrene and methacrylic acid, and the like. The difference (n1 - n2) between the refractive index (n1) of the particles and the refractive index (n2) of the binder resin is preferably 0.5 or less, and more preferably 0.3 or less. The lower limit value of (n1 - n2) is preferably -0.9 or more, and more preferably -0.8 or more. With such a range, an antiglare film excellent in transparency can be obtained. The ratio (n1 / n2) of the refractive index (n1) of the particles to the refractive index (n2) of the binder resin is preferably 0.8 to 1.2, more preferably 0.9 to 1.1. With such a range, an antiglare film excellent in transparency and anti-glare properties can be obtained.

The shape of the particles is not particularly limited and may be, for example, a substantially spherical shape such as a bead shape or an irregular shape such as a powder. The particles are preferably spherical particles having an aspect ratio of 1.5 or less, and more preferably spherical particles.

In the antiglare layer, the content of the particles is preferably 0.2 to 12 parts by weight, more preferably 0.5 to 12 parts by weight, more preferably 1 to 2 parts by weight, relative to 100 parts by weight of the binder resin Parts by weight to 9 parts by weight, and particularly preferably 1 part by weight to 7 parts by weight. With such a range, it is possible to obtain a retardation film excellent in the retardation and capable of preventing white blur.

In the composition for forming an antiglare layer, it is preferable that the particles exist in a good dispersibility (in a state of less aggregation). The dispersibility (degree of dispersion) of the particles can be evaluated from the particle size distribution measurement by laser diffraction scattering type particle size distribution measurement method, dynamic light scattering method, static light scattering method and the like. It can also be measured by a microscope observation with a scanning electron microscope or the like.

D ₅₀ (particle size at 50% volume) and volume cumulative particle size D ₉₀ (volume cumulative 90%) were measured when the dispersibility of the particles in the composition for forming an antiglare layer was evaluated by particle size distribution by a laser diffraction scattering particle size distribution measurement method. Is preferably 5 탆 or less, more preferably less than 3 탆, further preferably less than 1 탆, particularly preferably less than 0 탆 and less than 1 탆. With such a range, an antiglare layer having an appropriate surface shape can be formed.

When the dispersibility of the particles in the antiglare layer-forming composition is evaluated by the particle size distribution by the laser diffraction scattering particle size distribution measurement method, the content ratio of the particles having a particle diameter of 1 占 퐉 or more and less than 5 占 퐉 is, More preferably 50% by weight, more preferably 70% by weight or more, and even more preferably 80% by weight to 100% by weight. With such a range, an antiglare layer having an appropriate surface shape can be formed.

The composition for forming an antiglare layer may further comprise a cohesive filler. That is, the antiglare layer may also include a cohesive filler. By coagulating the cohesive filler, the concave-convex shape of the surface of the antiglare layer can be more strictly controlled. More specifically, it is possible to easily obtain an uneven surface having an average spacing Sm, an average inclination angle? A, and an arithmetic surface roughness Ra of the above range by adjusting the coagulation state of the cohesive filler. The cohesive state of the cohesive filler can be determined depending on the properties of the filler (for example, the chemical modification state of the surface, the affinity for the binder resin, the affinity for the solvent contained in the composition for forming an antiglare layer) The kind of the solvent to be contained, and the like.

Examples of the cohesive filler include organic clay, oxidized polyolefin, and modified urea. Among them, organic clay is preferable.

The organic clay includes, for example, smectite, talc, bentonite, montmorillonite, kaolinite, and the like. Among them, smectite is preferable. Commercially available products may be used as the organic clay. Examples of commercially available organic clay include trade name "Lucentite SAN", trade name "Lucentite STN", trade name "Lucentite SEN", trade name "Lucentite SPN", trade name "SOMASIF ME- 100 ", trade name" SOMASIFI MAE ", trade name" SOMASHIFE MTE ", trade name" SOMASHIFE MEE ", trade name" SOMASIF MPE "; trade name" SUBEN " Esben W, Esben W, Esben W, Esben WX, Esben N-400, Esben NX, Esben NX80, "Esben NO 12 S", trade name "Sben NEZ", trade name "Sben NO 12", trade name "Sben NE", trade name "Sben NZ", trade name "Sben NZ70" Night D ", trade name " Organon T & Trade name " Kunipia G ", trade name " Kunipia G4 ", trade name " Ticsoel VZ ", manufactured by Rockwood Additives, Tone 40 ", and the like.

As the oxidized polyolefin, for example, trade name "DIPARON 4200-20" manufactured by Kusumoto Chemical Co., Ltd. and "FLONON SA300" manufactured by Kyoeisha Chemical Co., Ltd. and the like can be mentioned.

The modified urea is a reaction product of an isocyanate monomer or its adduct and an organic amine. As the modified urea, for example, trade name " BYK410 "

The content of the cohesive filler is preferably 0.2 parts by weight to 5 parts by weight, more preferably 0.4 parts by weight to 4 parts by weight, based on 100 parts by weight of the binder resin.

The composition for forming an antiglare layer preferably contains any suitable photopolymerization initiator. Examples of the photo polymerization initiator include 2,2-dimethoxy-2-phenylacetophenone, acetophenone, benzophenone, xanthone, 3-methylacetophenone, 4-chlorobenzophenone, 4,4'-dimethoxy Benzophenone, benzoin propyl ether, benzyl dimethyl ketal, N, N, N ', N'-tetramethyl-4,4'-diaminobenzophenone, 1- (4- 2-methylpropan-1-one, thiozantone compounds, and the like.

The composition for forming an antiglare layer may or may not contain a solvent. Preferably, the composition for forming an antiglare layer comprises a solvent. Examples of the solvent include alcohols such as methanol, ethanol, isopropyl alcohol, butanol and 2-methoxyethanol; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclopentanone; Ethers such as ethyl acetate and butyl acetate, ethers such as diisopropyl ether and propylene glycol monomethyl ether, glycols such as ethylene glycol and propylene glycol, cellosolves such as ethyl cellosolve and butyl cellosolve, , Aliphatic hydrocarbons such as heptane and octane, and aromatic hydrocarbons such as benzene, toluene and xylene. These may be used alone or in combination of two or more. When the composition for forming an antiglare layer containing the organic clay is used, it is preferable to use toluene, cyclopentanone and / or xylene as a solvent.

In one embodiment, as the solvent, a mixed solvent containing cyclopentanone and / or methyl ethyl ketone (for example, a mixed solvent containing cyclopentanone and toluene, a mixed solvent containing methyl ethyl ketone and toluene ) Is used. When such a mixed solvent is used, the thickness of the intermediate layer can be adjusted depending on the content ratio of cyclopentanone or methyl ethyl ketone. The content of cyclopentanone or methyl ethyl ketone in the mixed solvent is preferably 1% by weight to 50% by weight, and more preferably 3% by weight to 50% by weight, based on the total amount of the mixed solvent. More preferably, a mixed solvent of cyclopentanone and toluene is used and a mixed solvent containing cyclopentanone in an amount of 1 wt% to 50 wt% is used. When the composition for forming an antiglare layer containing such a mixed solvent is used, an intermediate layer of a preferable thickness is formed on a resin film (for example, a triacetyl cellulose film) suitable as a transparent substrate of an antiglare film to form an antiglare layer can do.

In one embodiment, the SP value of the solvent is preferably 7 to 12 (cal / cm3) ^1/2 , more preferably 8 to 11 (cal / cm3) ^1/2 . With such a range, an antiglare layer can be formed while forming an intermediate layer having a preferable thickness for a resin film (for example, a triacetyl cellulose film) suitable as a transparent substrate of an antiglare film. The SP value is a solubility parameter calculated by the formula of Small. The calculation of the SP value can be carried out by a method described in a known document (for example, Journal of Applied Chemistry, 3, 71, 1953.). When the solvent is a mixed solvent, the SP value of the mixed solvent can be calculated based on the mole fraction of each solvent constituting the mixed solvent.

The solid content concentration of the composition for forming an antiglare layer is preferably 20% by weight to 80% by weight, more preferably 25% by weight to 60% by weight, and still more preferably 30% by weight to 50% by weight. With such a range, it is possible to easily obtain an uneven surface having the average spacing Sm, the average inclination angle? A and the arithmetic surface roughness Ra in the above range.

The composition for forming an antiglare layer may further comprise any suitable additive. Examples of the additive include a leveling agent, an antiblocking agent, a dispersion stabilizer, a thixotropic agent, an antioxidant, an ultraviolet absorber, a defoaming agent, a thickener, a dispersant, a surfactant, a catalyst, a slip agent and an antistatic agent.

The antiglare layer can be obtained by applying the composition for forming an antiglare layer to a transparent substrate, followed by curing. As a method of applying the composition for forming an antiglare layer, any appropriate method can be employed. Examples of the coating method include bar coating, roll coating, gravure coating, rod coating, slot orifice coating, curtain coating, fountain coating and comma coating.

In one embodiment, after the composition for forming an antiglare layer is applied to a transparent substrate, the transparent substrate on which the coating layer is formed is tilted or rotated before curing (or during curing). When the flocculant filler is contained in the composition for forming an antiglare layer, the contact between the flocculant pillars is promoted by carrying out such an operation, whereby the flocculant filler can be appropriately flocculated (shear flocculation). For example, it is possible to control the coagulation state of the cohesive filler by adjusting the inclination angle or rotation speed in the inclination or rotation.

As the curing method of the composition for forming an antiglare layer, any suitable curing treatment may be employed. Typically, the curing treatment is carried out by ultraviolet irradiation. The accumulated light quantity of the ultraviolet ray irradiation is preferably 50 mJ / cm 2 to 500 mJ / cm 2.

C. Transparent substrate

The transparent substrate may be formed from a resin film. As the transparent substrate (resin film), any suitable substrate (resin film) may be used as long as it has visible light transmittance. Examples of the material constituting the transparent substrate (resin film) include triacetylcellulose (TAC), polycarbonate, acrylic polymer, cyclic polyolefin, polyolefin having a norbornene structure, polyethylene terephthalate .

The thickness of the transparent substrate is preferably 10 to 500 탆, more preferably 20 to 300 탆, and still more preferably 30 to 100 탆. When the intermediate layer is not formed on the antiglare film, the thickness of the transparent base material corresponds to the thickness of the resin film. When the intermediate layer is formed on the antiglare film, the thickness of the transparent base material corresponds to the thickness of the portion of the resin film where the intermediate layer is not formed.

The SP value of the resin constituting the resin film is preferably 10 (cal / cm 3) ^1/2 or more, more preferably 15 (cal / cm 3) ^1/2 or more, more preferably 20 / Cm < 3 >) ^1/2 or more. In such a range, an intermediate layer having an appropriate thickness can be formed. The upper limit of the SP value of the resin is, for example, 30 (cal / cm3) ^1/2 or lower, preferably 28 (cal / cm3) ^1/2 or lower, more preferably 25 (cal / ^1/2 or less. In one embodiment, the difference between the SP value of the solvent contained in the composition for forming an antiglare layer and the SP value of the resin constituting the resin film (resin SP value - solvent SP value) is preferably -10 (Cal / cm3) ^1/2 , more preferably 5 to 20 (cal / cm3) ^1/2 , and 10 to 15 (cal / cm3) ^1/2 .

The refractive index of the transparent base material is preferably 1.30 to 1.80.

D. Middle Layer

As described above, an intermediate layer may be formed between the transparent substrate and the antiglare layer.

The thickness of the intermediate layer (thickness b in Fig. 2) is preferably 0.1% to 123% with respect to the thickness of the antiglare layer (thickness a in Fig. 2). The lower limit of the thickness ratio of the intermediate layer to the thickness of the antiglare layer is preferably 1%, more preferably 3%. The upper limit of the thickness ratio of the intermediate layer to the thickness of the antiglare layer is preferably 100%, more preferably 85%, still more preferably 65%. The thicknesses of the intermediate layer, the antiglare layer and the transparent substrate can be measured by observing the cross-section of the antiglare film with a microscope (for example, TEM) and specifying the interface between the intermediate layer and the resin layer and the adhesive layer have. For the specification of the interface, a predetermined analysis method (for example, time-of-flight secondary ion mass spectrometry) may be used.

In the present invention, by controlling the ratio in such a manner that the thickness of the intermediate layer formed when the antiglare layer is formed is not excessively thick, an antiglare film having a higher anti-glare effect can be obtained. INDUSTRIAL APPLICABILITY The antiglare film of the present invention can exhibit a superior anti-glare effect even when applied to a fixed three-image display device. Further, in the antiglare film of the present invention, even if the inside haze of the antiglare layer is relatively small, flashing is unlikely to occur, and therefore, transparency is excellent. By setting the ratio of the thickness of the intermediate layer to the thickness of the antiglare layer to be 123% or less, an antiglare layer having excellent scratch resistance can be formed.

By setting the ratio of the thickness of the intermediate layer to the thickness of the antiglare layer to 3% or more (more preferably, 10% or more), the particles in the antiglare layer can exist in good dispersibility (with little aggregation) As a result, an antiglare film capable of suppressing flashing can be obtained.

The thickness of the intermediate layer is preferably 0.1 μm to 30 μm, more preferably 0.3 μm to 20 μm, still more preferably 1 μm to 10 μm, and particularly preferably 1.5 μm to 5 μm.

E. Image display

3 is a schematic sectional view showing a part (visual side) of an image display apparatus according to one embodiment of the present invention. An image display device (200) includes an antiglare film (100) and an image display cell (30). Preferably, the antiglare film (100) is disposed with the transparent substrate (10) facing the image display cell (30). Any suitable optical member A may be disposed between the antiglare film 100 and the image display cell 30 and a predetermined gap X may be provided between the antiglare layer 10 and the image display cell 30. [ Is formed. Examples of the optical member A include a glass substrate, a polarizing plate, a retardation film, an adhesive layer, and a pressure-sensitive adhesive layer. A single optical member may be disposed between the antiglare film 100 and the image display cell 30, or a plurality of optical members may be arranged.

As the image display cell, any suitable image display cell can be used. For example, when the image display device is a liquid crystal display device, it corresponds to a liquid crystal cell, and in the case of an organic EL image display device, an organic EL device corresponds to an image display cell. Typically, a liquid crystal cell has a pair of substrates and a liquid crystal layer as a display medium disposed between the substrates.

The gap (X) between the antiglare layer and the image display cell in the antiglare film is preferably 100 mu m to 700 mu m. An image display apparatus having a comparatively thick glass substrate and excellent in heat resistance and strength can be obtained when the gap X is 100 mu m or more. The lower limit of the gap X is more preferably 150 m or more. By thickening the glass substrate, the effect of improving heat resistance and strength is remarkable. The anti-glare film of the present invention can suppress glare even when the gap X is large. Therefore, when the anti-glare film is used, improvement in heat resistance, strength and suppression of glare can be achieved. The optical member for defining the gap X is not limited to the glass substrate, and any suitable member may be disposed. Therefore, the effect of increasing the gap X is not limited to improvement in heat resistance and strength, and according to the present invention, an image display apparatus having a high degree of design freedom can be provided because of the small thickness restriction. On the other hand, when the gap X is 700 mu m or less, an image display device with less flashing can be obtained. The upper limit of the gap X is more preferably 650 m or less. When the gap X is 650 占 퐉 or less, an image display apparatus with less flicker can be obtained. The gap (X) between the antiglare layer and the image display cell in the antiglare film is set so that the distance between the back surface of the antiglare layer (surface on the image display cell side) and the visual side surface of the image display cell it means. Therefore, the gap X is a total thickness of the optical member A disposed between the antiglare film 100 and the image display cell 30 (for example, the total thickness of the polarizing plate, the glass substrate, and / ), And the total thickness of the transparent substrate (the transparent substrate and the intermediate layer when the intermediate layer is formed) in the antiglare film. When the image display cell is a liquid crystal cell, the gap X is the distance between the viewer-side surface of the viewer-side substrate and the back surface of the antiglare layer provided in the liquid crystal cell.

More specifically, the antiglare film of the present invention is suitably used for an image display apparatus having a relatively thick glass substrate (for example, a glass substrate having a thickness of 100 mu m to 700 mu m). Conventionally, in applications where heat resistance, strength, and the like are required (for example, in a vehicle use), heat resistance is increased by thickening the glass substrate. However, the inventors of the present invention have found that accompanied with thickening of the glass substrate, that is, thickening of the gap X, flashing occurring when the antiglare film is applied is increased. That is, the antiglare film of the present invention can solve this problem and can be suitably used for an image display apparatus for on-vehicle use. Further, the effect of using the antiglare film of the present invention becomes more remarkable for a fixed three-image display device.

The image display device may also include any suitable member. For example, a polarizing plate, an optical film, a backlight, etc. formed on the back side of the image display cell.

Example

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

The weight average particle diameter of the particles was measured by the Coulter count method. Specifically, for the composition for forming an antiglare layer, a particle size distribution measuring device (trade name: Coulter Multisizer, manufactured by Beckman-Coulter, Inc.) The electric resistance of the electrolytic solution corresponding to the volume of the particles at the time of passing through was measured, and the number and the volume of the particles were measured and the weight average particle diameter was calculated.

D ₅₀ (particle diameter at 50% volume) and volume accumulation (particle size distribution) obtained by laser diffraction scattering particle size distribution measurement method using "MicrotracUPA (model number)" manufactured by Nikkiso Co., Means the absolute value of the difference in particle diameter D ₉₀ (particle diameter at 90% volume).

The thickness of each layer was measured by observing the cross section with an optical microscope (trade name "VHX-700F", manufactured by CHIENSEI Co., Ltd.) or TEM (trade name "H-7650" At the time of observation with an optical microscope, the antiglare film subjected to resin molding was cut with a microtome to prepare a sample for observation. At the time of observation by TEM, a sample was prepared by an ultrathin slicing method including a heavy metal dyeing treatment.

The refractive index was determined by using an Abbe refractometer (trade name: DR-M2 / 1550, manufactured by Atago), selecting monobromonaphthalene as an intermediate liquid, and causing measurement light to be incident on the measurement surface , And measurement was carried out by the prescribed measuring method shown in the above apparatus.

[Example 1]

50 parts by weight of pentaerythritol triacrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name "Viscot # 300") as a binder resin and 50 parts by weight of a urethane acrylate prepolymer (trade name "UA-53H-80BK" And 3.5 parts by weight of silicone particles (Mortifive Performance Materials Japan Co., Ltd., trade name: "Tospearl 130", weight average particle diameter: 3 μm, | D ₉₀ -D ₅₀ |: 2.5 μm, refractive index: 1.42) , 3 parts by weight of a photopolymerization initiator (trade name: Irgacure 907, trade name; manufactured by BASF), and 2 parts by weight of a leveling agent (DIC 0.2 parts by weight of a solid content of 10% by weight) was mixed and diluted with a toluene / cyclopentanone (CPN) mixed solvent (weight ratio 70/30) to obtain a composition for forming an antiglare layer having a solid concentration of 33% Lt; / RTI > The organic clay was diluted with toluene to a solid content of 6% by weight.

The composition for forming an antiglare layer was coated on a triacetylcellulose (TAC) film (trade name: "KC4UA", manufactured by Konica Minolta Opto Corporation, thickness: 40 μm) as a transparent substrate using a comma coater (registered trademark) And then irradiated with ultraviolet light of 300 mJ / cm 2 in total intensity with a high-pressure mercury lamp to obtain an antiglare film in which an antiglare layer (thickness: 6.3 μm) was formed on a transparent substrate. An intermediate layer of 1.7 占 퐉 was formed between the transparent substrate of the antiglare film and the antiglare layer.

[Example 2]

50 parts by weight of pentaerythritol triacrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name "Viscot # 300") as a binder resin and 50 parts by weight of a urethane acrylate prepolymer (trade name "UA-53H-80BK" , 5 parts by weight of polystyrene particles (trade name: "TAKPOLMER", weight average particle size: 3 μm, | D ₉₀ -D ₅₀ |: 2.5 μm, refractive index: 1.59, manufactured by Sekisui Chemical Co., , 3 parts by weight of a photopolymerization initiator (trade name: Irgacure 907, trade name, manufactured by BASF), and 2 parts by weight of a leveling agent (trade name: PC4100, trade name, , Solid content 10%) were mixed and diluted with a toluene / cyclopentanone (CPN) mixed solvent (weight ratio 70/30) to prepare a composition for forming an antiglare layer having a solid content concentration of 35% by weight. The organic clay was diluted with toluene to a solid content of 6% by weight.

The composition for forming an antiglare layer was applied to a triacetylcellulose film (Konica Minolta Opto, trade name "KC4UA", thickness: 40 μm) as a transparent substrate using a comma coater (registered trademark) After heating, a high-pressure mercury lamp was irradiated with an ultraviolet ray having a cumulative light quantity of 300 mJ / cm 2 to obtain an antiglare film having an antiglare layer (thickness: 6.3 μm) formed on a transparent substrate. An intermediate layer of 1.7 占 퐉 was formed between the transparent substrate of the antiglare film and the antiglare layer.

[Comparative Example 1]

The blending amount of the particles was adjusted to 5 parts by weight, the blending amount of the synthetic smectite (trade name: Lucentite SAN, manufactured by KOP Chemical Co., Ltd.) as the organic clay was set to 1.5 parts by weight, and the solid content concentration of the composition for forming an antiglare layer was adjusted to 42% An antiglare film was obtained in the same manner as in Example 1 except for the above.

[Comparative Example 2]

The same procedure as in Example 1 was carried out except that the blending amount of the synthetic smectite (manufactured by Kobunshi Chemical Co., Ltd., trade name "Lucentite SAN") as an organic clay was changed to 2.2 parts by weight and the solid content concentration of the composition for forming an antiglare layer was changed to 33.5% An antiglare film was obtained.

[Comparative Example 3]

An antiglare film was obtained in the same manner as in Example 1, except that the synthetic smectite (manufactured by Kobunshi Kagaku Co., Ltd., trade name: Lucentite SAN), which is an organic clay, was not used.

[Comparative Example 4]

An antiglare film was obtained in the same manner as in Example 1 except that the blending amount of the particles was changed to 10 parts by weight.

[Comparative Example 5]

An antiglare film was obtained in the same manner as in Example 1 except that the blending amount of the particles was changed to 0.5 part by weight.

[Comparative Example 6]

An antiglaving film was obtained in the same manner as in Example 1 except that the amount of the synthetic smectite (manufactured by Kobunshi Kagaku Co., Ltd., trade name "Lucentite SAN") as the organic clay was changed to 10 parts by weight.

[Comparative Example 7]

An antiglaving film was obtained in the same manner as in Example 1 except that the amount of the synthetic smectite (manufactured by Kobunshi Chemical Co., Ltd., trade name "Lucentite SAN") as the organic clay was changed to 0.2 parts by weight.

[Comparative Example 8]

An antiglare film was obtained in the same manner as in Example 1 except that the solid content concentration of the composition for forming an antiglare layer was changed to 85% by weight.

[Comparative Example 9]

An antiglare film was obtained in the same manner as in Example 1 except that the solid content concentration of the composition for forming an antiglare layer was changed to 15% by weight.

[Comparative Example 10]

Silicone particles: | - | instead of (Momentive, performance, Materials, Japan Joint Ltd., product name "toss pearl 130", weight average particle diameter of _{3 ㎛, D 90 D 50:} : 2.5 ㎛, refractive index 1.42), silicon particles (Manufactured by Momentive Performance Materials Japan Co., Ltd., trade name: TOPSULAP 105, weight average particle diameter: 0.5 μm, | D ₉₀ -D ₅₀ |: 2.5 μm, refractive index: 1.42) 1, an antiglare film was obtained.

[Comparative Example 11]

Silicone particles: | - | instead of (Momentive, performance, Materials, Japan Joint Ltd., product name "toss pearl 130", weight average particle diameter of _{3 ㎛, D 90 D 50:} : 2.5 ㎛, refractive index 1.42), silicon particles (Manufactured by Momentive Performance Materials Japan Co., Ltd., trade name: "Tospel 3120", weight average particle diameter: 15 μm, | D ₉₀ -D ₅₀ |: 2.5 μm, refractive index: 1.42) 1, an antiglare film was obtained.

[Comparative Example 12]

Silicone particles: | - | instead of (Momentive, performance, Materials, Japan Joint Ltd., product name "toss pearl 130", weight average particle diameter of _{3 ㎛, D 90 D 50:} : 2.5 ㎛, refractive index 1.42), silicon particles (Mortem Performance Materials, Japan Joint-stock Company, trade name: "Tospearl 130", weight average particle diameter: 3 μm, | D ₉₀ -D ₅₀ |:20 μm, refractive index: 1.42) 1, an antiglare film was obtained.

[Comparative Example 13]

An antiglare film was obtained in the same manner as in Example 1 except that the thickness of the antiglare layer was changed to 15.9 탆.

[Comparative Example 14]

An antiglare film was obtained in the same manner as in Example 1 except that the thickness of the antiglare layer was 1.59 탆.

[Comparative Example 15]

50 parts by weight of pentaerythritol triacrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name "Viscot # 300") as a binder resin and 50 parts by weight of a urethane acrylate prepolymer (trade name "UA-53H-80BK" (Weight average particle diameter by laser analysis scattering method: 2.7 占 퐉 (reference value)) according to the Coulter counter method), and a refractive index (refractive index) of the porous silica particles (manufactured by Fuji Silysia Chemical Co., : 1.46 part by weight), 20 parts by weight of a synthetic smectite (trade name: Lucentite SAN, manufactured by Kobunshi Kagaku Co., Ltd.) and 3 parts by weight of a photopolymerization initiator (trade name: Irgacure 907, And 0.2 part by weight of a leveling agent (trade name "PC4100", solid content 10%, manufactured by DIC) were mixed and diluted with a toluene / cyclopentanone (CPN) mixed solvent (weight ratio 70/30) To prepare a composition for forming an antiglare layer. The organic clay was diluted with toluene to a solid content of 6% by weight.

An antiglare film was obtained in the same manner as in Example 1 except that the thus obtained composition for forming an antiglare layer was used.

<Evaluation>

The antiglare films obtained in Examples and Comparative Examples were provided in the following evaluation. The results are shown in Table 1.

1, the shape of the antiglare layer irregularities (Ra, Sm, &amp;thetas; a)

According to JIS B0601 (1994 edition), the average irregularity distance Sm (mm) and the arithmetic mean surface roughness Ra (占 퐉) were measured. Specifically, a glass plate (MICRO SLIDE GLASS, part number S, thickness: 1.3 mm, 45 x 50 mm, manufactured by MATSUNAMI Co., Ltd.) was bonded to the surface of the transparent substrate of the antiglare film opposite to the antiglare layer with an adhesive agent , And a sample was prepared. Using a stylus type surface roughness measuring instrument (high precision fine shape measuring machine, trade name &quot; Surfcoder ET4000 &quot;, manufactured by Kosaka Laboratory Co., Ltd.) having a measuring needle with radius of curvature R = 2 탆 at the tip (diamond) / Sec, a cut-off value of 0.8 mm, and a measurement length of 4 mm, the surface shape of the antiglare layer in the sample was measured in a predetermined direction, and the average irregularity distance Sm (mm) and arithmetic mean surface roughness Ra were obtained . The average inclination angle? A (?) Was obtained from the obtained surface roughness curve. Further, the high precision fine shape measuring device automatically calculates each of the measured values.

2, Flashing evaluation

A glass plate (thickness: 700 占 퐉) was placed on a backlight (trade name: "LightViewer 5700", manufactured by Hakuba Photo Ind. Co., Ltd.) and a black matrix pattern was arranged on the surface of the glass plate opposite to the backlight .

Four sheets of a TAC film (thickness: 80 占 퐉) and four layers of a pressure-sensitive adhesive layer (thickness: 20 占 퐉) were alternately laminated on the evaluation table as members A constituting a part of the gap X, A TAC film (thickness: 40 占 퐉) and a pressure-sensitive adhesive layer (thickness: 20 占 퐉) were laminated.

The antiglare films obtained in Examples and Comparative Examples were arranged on the member (A) with the transparent base down (that is, the pressure-sensitive adhesive layer and the transparent base were opposed to each other). In addition, such a constitution has a glare when the gap X is 500 탆 (= TAC 80 탆 4 + TAC 40 탆 1 + pressure-sensitive adhesive layer 20 탆 5 + total transparent substrate and intermediate layer 40 탆) .

Then, the antiglare film was irradiated with light, and the glare generated in the antiglare film was evaluated according to the following criteria.

In addition, the degree of precision of the black matrix pattern was 105 ppi, 200 ppi, and 267 ppi, and the above evaluation was carried out for each degree of specificity.

○: There is almost no flashing.

?: There is a flashing, but there is no practical problem.

X: There was a problematic flashing in the practical use.

3, haze value

Was measured using a haze meter (manufactured by Murakami Color Research Laboratory, product name: &quot; HM-150 &quot;) according to haze (haze) of JIS K 7136 (2000 edition).

4, white cloudy

A black acrylic plate (manufactured by Mitsubishi Rayon Co., Ltd., thickness: 2 mm) was attached to the surface of the transparent substrate opposite to the antiglare layer through a pressure-sensitive adhesive to prepare an evaluation sample suppressing the influence of the back surface reflection.

The degree of white blurring was visually observed from the direction of 60 DEG with the vertical direction as a reference (0 DEG) with respect to the upper surface of the evaluation sample under an environment of an illuminance of 1000 Lx (corresponding to a general office environment using a display) And evaluated by the following evaluation criteria.

○: White cloudiness is not seen.

?: White blur is observed to the extent that the influence on the visibility is small.

X: There is a strong white cloudiness that significantly lowers the visibility.

5, repellency

A black acrylic plate (manufactured by Mitsubishi Rayon Co., Ltd., thickness: 2 mm) was attached to the surface of the transparent substrate opposite to the antiglare layer through a pressure-sensitive adhesive to prepare an evaluation sample suppressing the influence of the back surface reflection.

The evaluation sample was irradiated with a fluorescent lamp (three-wavelength light source) under an environment of an illuminance of 1000 Lx (corresponding to a common office environment using a display), and the antiglare property of the antiglare film was visually evaluated according to the following evaluation criteria.

◯: No image sticking affecting visibility occurs.

[Delta]: There is a problem that the image does not have a problem in practical use.

X: There is image non-uniformity, and practical problems arise.

As is evident from Table 1, the antiglare film of the present invention has a specific average spacing Sm, an average tilt angle? A, and an arithmetic average surface roughness Ra, and thus the antiglare film has excellent antireflection property and transparency, can do.

[Referential Example 1-E1, 1-E2, 1-C1]

An antiglare film was obtained in the same manner as in Examples 1 and 2 and Comparative Example 1, and the flashing of each of the antiglare films was evaluated as follows.

An evaluation table was prepared in the same manner as the evaluation (2).

On this evaluation table, a pressure-sensitive adhesive layer (thickness: 20 占 퐉) was arranged as a member A constituting a part of the gap X.

The antiglare films obtained in Examples and Comparative Examples were arranged on the member (A) with the transparent base down (that is, the pressure-sensitive adhesive layer and the transparent base were opposed to each other). Such a structure is a structure for evaluating the flashing when the gap X is 60 占 퐉 (= 20 占 퐉 in the pressure-sensitive adhesive layer + 40 占 퐉 in total of the transparent substrate and the intermediate layer).

With this configuration, the same evaluation as that of the evaluation (2) was performed. The results are shown in Table 2.

[Referential Example 2-E1, 2-E2, 2-C1]

An antiglare film was obtained in the same manner as in Examples 1 and 2 and Comparative Example 1, and the flashing of each of the antiglare films was evaluated as follows.

An evaluation table was prepared in the same manner as the evaluation (2).

Seven sheets of a TAC film (thickness: 80 占 퐉) and seven layers of a pressure-sensitive adhesive layer (thickness: 20 占 퐉) were alternately laminated on the evaluation table as members A constituting a part of the gap X, A TAC film (thickness: 40 占 퐉) and a pressure-sensitive adhesive layer (thickness: 20 占 퐉) were laminated.

The antiglare films obtained in Examples and Comparative Examples were arranged on the member (A) with the transparent base down (that is, the pressure-sensitive adhesive layer and the transparent base were opposed to each other). Such a structure is evaluated when the gap X is 800 占 퐉 (= TAC 80 占 퐉 x 7 + TAC 40 占 퐉 x 1 + pressure-sensitive adhesive layer 20 占 퐉 x 8 + total thickness of the transparent base material and the intermediate layer is 40 占 퐉) .

With this configuration, the same evaluation as that of the evaluation (2) was performed. The results are shown in Table 2.

As is apparent from Tables 1 and 2, the image display apparatus of the present invention exhibits a remarkable anti-glare effect when the gap X is within a specific range (700 占 퐉 or less). Also, an image display apparatus having a thick glass substrate and having a gap X of 100 mu m or more is excellent in durability.

10: transparent substrate
20: Visible layer
100: Antiglare film

Claims (9)

A transparent substrate, and an antiglare layer disposed on at least one surface of the transparent substrate,
The surface of the antiglare layer opposite to the transparent substrate is an uneven surface,
The mean spacing Sm of the uneven surfaces is in the range of 150 mu m to 350 mu m,
The average inclination angle &amp;thetas; a of the uneven surface is 0.1 DEG to 2.5 DEG,
Wherein the arithmetic mean surface roughness Ra of the uneven surface is 0.05 mu m to 0.5 mu m. The method according to claim 1,
Wherein an average interval Sm of the irregularities on the uneven surface, an average inclination angle? A, and an arithmetic average surface roughness Ra of the irregular surface show a relationship of 0? Ra / Sm 占? A 占 1000? 4. 3. The method according to claim 1 or 2,
Wherein the antiglare layer comprises a binder resin and particles,
Wherein the weight average particle diameter of the particles is 1 占 퐉 to 10 占 퐉. 4. The method according to any one of claims 1 to 3,
Wherein the content of the particles is 1 part by weight to 9 parts by weight based on 100 parts by weight of the binder resin. 5. The method according to any one of claims 1 to 4,
Wherein the antiglare layer comprises a cohesive filler. 6. The method of claim 5,
Wherein the cohesive filler is an organic clay. 7. The method according to any one of claims 1 to 6,
Wherein the antiglare layer has a thickness of 3 mu m to 15 mu m. 8. The method according to any one of claims 1 to 7,
Further comprising an intermediate layer formed between the transparent substrate and the antiglare layer, the intermediate layer comprising at least a part of a material constituting the transparent substrate and / or at least a part of the binder resin,
Wherein the thickness of the intermediate layer is 0.1% to 123% with respect to the thickness of the antiglare layer. 9. An antireflection film comprising: an antiglare film according to any one of claims 1 to 8; and an image display cell,
And the gap between the antiglare film and the image display cell is 100 占 퐉 to 700 占 퐉.

Images