JP2017032711A - Antiglare film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antiglare film capable of suppressing glare while maintaining an antiglare property and transparency even in an image display apparatus requiring high definition and heat resistance.SOLUTION: An antiglare film includes: a transparent base material layer; an antiglare layer arranged at least on one side of the transparent base material layer and containing a binder resin and particles; and an intermediate layer formed between the transparent base material layer and the antiglare layer and containing at least part of a material composing the transparent base material layer and at least part of the binder resin. Thickness of the intermediate layer is 0.1%-123% of thickness of the antiglare layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an antiglare film.

  Conventionally, an anti-glare film is sometimes used in an image display device for the purpose of preventing a decrease in contrast due to reflection of external light, reflection of an image, or the like. In recent years, with the increase in definition of image display devices, there has been a problem that glare caused by an antiglare film occurs. Specifically, when a conventional anti-glare film is applied to a high-definition image display device, luminance variations existing in pixels are emphasized, and glare is likely to occur.

  As a technique for solving the above problem, a technique for increasing the internal haze of an antiglare film has been proposed. However, in this technology, it is necessary to further increase the internal haze with the further increase in definition required in recent years, and there is a possibility that it becomes unsuitable for practical use from the viewpoint of transparency.

  In addition, in an image display device having a configuration in which a relatively thick glass or the like is disposed on the back side of an antiglare film, for example, an in-vehicle image display device that requires heat resistance (for example, a car navigation monitor, an instrument panel monitor, etc.) The glare problem is more noticeable.

  Thus, in an image display device that requires high definition and heat resistance, application of an antiglare film that can further suppress glare while maintaining antiglare properties and transparency is required.

JP201409456A

  The present invention has been made to solve the above-described problems, and the object of the present invention is to maintain anti-glare and transparency even in an image display device that requires high definition and heat resistance. Furthermore, it is providing the anti-glare film which can suppress glare.

The antiglare film of the present invention comprises a transparent substrate layer, an antiglare layer disposed on at least one side of the transparent substrate layer, and containing a binder resin and particles, and the transparent substrate layer and the antiglare layer. An intermediate layer formed between and including at least a part of the material constituting the transparent base material layer and at least a part of the binder resin, the thickness of the intermediate layer being equal to the thickness of the antiglare layer On the other hand, it is 0.1% to 123%.
In one embodiment, the ratio (n2 / n1) of the refractive index (n2) of the particles to the refractive index (n1) of the binder resin is 0.8 to 1.2.
In one embodiment, the transparent substrate layer is formed from a resin film, and the antiglare layer is formed using a composition for forming an antiglare layer containing a curable compound, particles, and a solvent. The difference between the SP value and the SP value of the resin constituting the resin film (resin SP value−solvent SP value) is −10 to 20 (cal / cm ³ ) ^1/2 .
In one embodiment, the ratio of the thickness of the antiglare layer to the weight average particle diameter of the particles (the weight average particle diameter of the particles / the thickness of the antiglare layer) is 0.15 to 2.0. .
According to another aspect of the present invention, an image display device is provided. The image display device includes the antiglare film and an image display cell disposed on one side of the antiglare film, and the antiglare film is disposed with the transparent base material layer facing the image display cell. A gap is formed between the intermediate layer and the image display cell, and the size of the gap is 100 μm to 700 μm.

  According to the present invention, an intermediate layer including a material constituting the transparent base layer and a material constituting the anti-glare layer is formed between the transparent base layer and the anti-glare layer, and the thickness of the intermediate layer is specified. By setting it as thickness, the anti-glare film which can suppress glare can be provided, maintaining anti-glare property and transparency. The antiglare film of the present invention is particularly useful in an image display device that requires high definition and heat resistance.

It is a schematic sectional drawing of the anti-glare film by one embodiment of this invention. It is a photograph figure which shows the cross section of the anti-glare film by one Embodiment of this invention. It is a schematic sectional drawing which shows an example of the image display apparatus using the anti-glare film of this invention.

A. Overall configuration diagram 1 of the antiglare film is a schematic cross-sectional view of the anti-glare film according to one embodiment of the present invention. The antiglare film 100 includes a transparent base material layer 10 and an antiglare layer 30 disposed on at least one side of the transparent base material layer 10. Between the transparent base material layer 10 and the antiglare layer 30, An intermediate layer 20 is formed. Typically, the transparent base material layer 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 antiglare layer-forming composition contains a binder resin (or a binder resin precursor) and particles, and the antiglare layer 30 formed from such an antiglare layer-forming composition comprises binder resin and particles. Including. The intermediate layer 20 is typically formed by penetrating the resin film with a composition for forming an antiglare layer. When the antiglare layer forming composition is applied to the resin film to form the antiglare layer, the material constituting the resin film may be eluted into the antiglare layer forming composition. Thus, the part formed by elution of the material constituting the resin film also corresponds to the intermediate layer 20. That is, the intermediate layer 20 can include at least a part of the material constituting the transparent base material layer 10 and at least a part of the binder resin included in the antiglare layer 30. The intermediate layer 20 may be a layer formed by combining the material constituting the transparent base layer 10 and the binder resin contained in the antiglare layer 30. Further, the intermediate layer 20 is a layer in contact with both the transparent base material layer 10 and the antiglare layer 20. Although not shown, the antiglare film may further include an antireflection layer on the surface of the antiglare layer opposite to the transparent base material layer. The antireflection layer can be formed by any appropriate method.

  The thickness of the intermediate layer (thickness b in FIG. 1) is 0.1% to 123% with respect to the thickness of the antiglare layer (thickness a in FIG. 1). The lower limit of the thickness ratio of the intermediate layer to the thickness of the antiglare layer is preferably 1%, more preferably 3%. Further, the upper limit of the thickness ratio of the intermediate layer to the thickness of the antiglare layer is preferably 100%, more preferably 85%, and further preferably 65%. The thickness of the intermediate layer, the antiglare layer and the transparent substrate layer is measured by observing the cross section of the antiglare film with a microscope (for example, TEM) and specifying the interface between the intermediate layer, the resin layer and the adhesive layer. Can be done. In FIG. 2, an example of the TEM photograph of the cross section of an anti-glare film is shown. In FIG. 2, the vicinity of the interface between the intermediate layer, the resin layer, and the adhesive layer is shown enlarged. A predetermined analysis method (for example, time-of-flight secondary ion mass spectrometry) may be used for specifying the interface. Such a method can be used when the interface is difficult to identify with a microscope. The thickness of the antiglare layer means the distance from the flat portion on the surface of the antiglare layer to the interface between the antiglare layer and the intermediate layer.

  In this invention, the anti-glare film which can suppress glare can be obtained by controlling to the said ratio so that the thickness of the said intermediate | middle layer formed when forming an anti-glare layer may not become too thick. Even if the antiglare film of the present invention is applied to a high-definition image display device, it can exhibit a sufficient glare-suppressing effect. The antiglare film of the present invention has a relatively thick optical member (for example, glass, polarizing plate, retardation film) disposed on the back surface of the antiglare film, and a viewing surface and an image display cell (for example, a liquid crystal cell). The glare-suppressing effect can be exhibited even for an image display device having a long distance from the image display device. In addition, the antiglare film of the present invention hardly causes glare even if the internal haze of the antiglare layer is relatively small, and therefore has excellent transparency. Furthermore, when the ratio of the thickness of the intermediate layer to the thickness of the antiglare layer is 123% or less, an antiglare layer having excellent scratch resistance can be formed.

  Moreover, by setting the ratio of the thickness of the intermediate layer to the thickness of the antiglare layer to be 0.1% or more, an antiglare film having excellent adhesion between the antiglare layer and the transparent substrate layer (resin film) can be obtained. it can. Such an effect becomes remarkable when the ratio of the thickness of the intermediate layer to the thickness of the antiglare layer is 3% or more. Furthermore, by setting the ratio of the thickness of the intermediate layer to the thickness of the antiglare layer to be 3% or more (more preferably 10% or more), the above particles are present in the antiglare layer with good dispersibility (with little aggregation). As a result, an antiglare film capable of suppressing glare 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.

  The thickness of the antiglare layer is preferably 0.5 μm to 300 μm, more preferably 2 μm to 200 μm, still more preferably 4 μm to 100 μm, particularly preferably 4 μm to 50 μm, and most preferably 4 μm to 10 μm. If it is such a range, the anti-glare film which cannot easily inhibit the visibility of an image display apparatus can be obtained. Moreover, it can be set as a glare-proof layer with favorable uneven | corrugated shape by the combination with the said particle | grain.

  The thickness of the transparent substrate layer (thickness c in FIG. 1) is preferably 10 μm to 500 μm, more preferably 20 μm to 300 μm, and further preferably 30 μm to 100 μm.

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

B. Antiglare layer The antiglare layer contains 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 layer, and then curing the composition. The composition for forming an antiglare layer may contain a curable compound, particles, a solvent, 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.

  The refractive index (n1) of the binder resin is preferably 1.3 to 1.7, and more preferably 1.4 to 1.6. The “refractive index (n1) of the binder resin” means the refractive index of the region formed of the binder resin in the antiglare layer, and corresponds to the refractive index of the antiglare layer when it is assumed that no particles exist.

  Preferably, the composition for forming an antiglare layer contains a polyfunctional monomer, an oligomer derived from a polyfunctional monomer and / or a prepolymer derived from a polyfunctional monomer as a curable compound serving as a main component. Examples of the polyfunctional monomer include polyfunctional acrylic monomers. Specifically, tricyclodecane dimethanol diacrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylolpropane triacrylate, pentaerythritol tetra (meth) acrylate, dimethylolpropanthate tetraacrylate, Dipentaerythritol hexa (meth) acrylate, 1,6-hexanediol (meth) acrylate, 1,9-nonanediol diacrylate, 1,10-decanediol (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol Di (meth) acrylate, dipropylene glycol diacrylate, isocyanuric acid tri (meth) acrylate, ethoxylated glycerin triacrylate, Toxylated pentaerythritol tetraacrylate and the like can be mentioned. A polyfunctional monomer may be used independently and may be used in combination of multiple.

  In one embodiment, a polyfunctional monomer having a hydroxyl group is used as the curable compound. If the composition for anti-glare layer formation containing the polyfunctional monomer which has a hydroxyl group is used, the adhesiveness of a transparent base material layer (resin film) and an anti-glare layer can be improved. Specific 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% with respect to the total amount of the monomer, oligomer and prepolymer in the composition for forming an antiglare layer. % To 100% by weight, more preferably 30% to 95% by weight, and particularly preferably 40% to 95% by weight. Improving the adhesion between the transparent substrate layer (resin film) and the antiglare layer by setting the content of the functional monomer, the oligomer derived from the polyfunctional monomer and the prepolymer derived from the polyfunctional monomer to 10% by weight or more. Can do. Moreover, the antiglare film with a higher glare suppression effect can be obtained by making the said content rate into 95 weight% or less.

  The antiglare layer forming composition 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, lauryl acrylate, isooctyl acrylate, and isostearyl acrylate. Cyclohexyl acrylate, isoholonyl acrylate, benzyl acrylate, 2-hydroxy-3-phenoxy acrylate, acryloylmorpholine, 2-hydroxyethyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, hydroxyethylacrylamide, 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) acrylate, 2-hydroxy-3-phenoxyacrylate, 1,4 -Hydroxyalkyl (meth) acrylates such as cyclohexane methanol monoacrylate; N- (2-hydroxyalkyl) (meth) acrylamides such as N- (2-hydroxyethyl) (meth) acrylamide and N-methylol (meth) acrylamide Can be mentioned. Of these, 4-hydroxybutyl acrylate and N- (2-hydroxyethyl) acrylamide are preferable.

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

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

  Examples of the polyol include ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, diethylene glycol, dipropylene glycol, neopentyl glycol, 1,3-butanediol, 1,4-butanediol, 1, 6-hexanediol, 1,9-nonanediol, 1,10-decanediol, 2,2,4-trimethyl-1,3-pentanediol, 3-methyl-1,5-pentanediol, neopentyl hydroxypivalate Glycol ester, tricyclodecane dimethylol, 1,4-cyclohexanediol, spiroglycol, hydrogenated bisphenol A, ethylene oxide-added bisphenol A, propylene oxide-added bisphenol A, trimethylol ethane, trimethylol Propane, glycerin, 3-methylpentane-1,3,5-triol, pentaerythritol, dipentaerythritol, tripentaerythritol, glucose, etc. can be mentioned.

  As said diisocyanate, various aromatic, aliphatic, or alicyclic diisocyanates can be used, for example. 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 made uneven. In addition, the haze value of the antiglare layer can be controlled. Examples of the particles include inorganic particles and organic particles. 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, and the like. It is done. 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, and polyester. Examples thereof include resin particles, polyamide resin particles, polyimide resin particles, and polyfluorinated ethylene resin particles. The said particle | grains may be used independently and may be used in combination of multiple.

  The weight average particle diameter of the particles is preferably 1 μm to 10 μm, more preferably 2 μm to 7 μm. If it is such a range, the anti-glare film which is more excellent in anti-glare property and can prevent white blurring can be obtained. The weight average particle diameter of the particles can be measured by a Coulter counting method. In the antiglare layer or the composition for forming an antiglare layer, the particles may exist in the form of primary particles and / or in the form of aggregated primary particles. The “average particle diameter” means the weight average particle diameter measured by the Coulter counting method for the particles in the composition for forming an antiglare layer regardless of the particle form.

  The ratio of the thickness of the antiglare layer to the weight average particle size of the particles (particle weight average particle size / antiglare layer thickness) is preferably 0.15 to 2.0, more preferably 0.00. It is 3-0.9, More preferably, it is 0.35-0.8. If it is such a range, it can be excellent in anti-glare property and can form a glare-proof layer with a greater glare control effect.

  The refractive index (n2) of the particles is preferably 1.1 to 1.9, and more preferably 1.3 to 1.7. Examples of the particles having such a refractive index include silicone particles, polystyrene particles, polymethyl methacrylate, a copolymer of styrene and methacrylic acid, and the like.

  The ratio (n2 / n1) of the refractive index (n2) of the particles to the refractive index (n1) of the binder resin is preferably 0.8 to 1.2, more preferably 0.9 to 1.1. is there. If it is such a range, the anti-glare film which is excellent in transparency and a glare suppression effect can be obtained.

  The absolute value | n1-n2 | of the difference between the refractive index (n1) of the binder resin and the refractive index (n2) of the particles is preferably 0.5 or less, more preferably 0.3 or less. If it is such a range, the anti-glare film which is excellent in transparency and a glare suppression effect 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 indefinite shape such as a powder. Preferably, it is a substantially spherical particle having an aspect ratio of 1.5 or less, more preferably a spherical particle.

  In the antiglare layer, the content ratio of the particles is preferably 0.2 parts by weight to 12 parts by weight, more preferably 0.5 parts by weight to 12 parts by weight, with respect to 100 parts by weight of the binder resin. More preferably, it is 1 to 9 parts by weight, and particularly preferably 1 to 7 parts by weight. If it is such a range, the anti-glare film which is more excellent in anti-glare property and can prevent white blurring can be obtained.

  In the composition for forming an antiglare layer, the particles are preferably present with good dispersibility (with little aggregation). The dispersibility (dispersion degree) of the particles can be evaluated from particle size distribution measurement by a laser diffraction / scattering particle size distribution measurement method, a dynamic light scattering method, a static light scattering method, or the like. Further, it can be measured by microscopic observation with a scanning electron microscope or the like.

When the dispersibility of the particles in the composition for forming an antiglare layer is evaluated by a particle size distribution by a laser diffraction / scattering particle size distribution measurement method, D ₅₀ (particle size at 50% cumulative volume) and volume cumulative particle size D ₉₀ (volume) The absolute value of the difference from the particle size at 90% cumulative) is preferably 5 μm or less, more preferably less than 3 μm, further preferably less than 1 μm, and particularly preferably from 0 μm to less than 1 μm. preferable. If it is such a range, the glare-proof layer which has a suitable surface shape can be formed.

  When the dispersibility of the particles in the composition for forming an antiglare layer is evaluated by a particle size distribution by a laser diffraction scattering type particle size distribution measuring method, the content ratio of particles having a particle size of 1 μm or more and less than 5 μm is determined by the ratio of the particles in the composition. The total amount is preferably more than 50% by weight, more preferably 70% by weight or more, and further preferably 80% by weight to 100% by weight. If it is such a range, the glare-proof layer which has a suitable surface shape can be formed.

  The antiglare layer forming composition may further contain a cohesive filler. That is, the antiglare layer may further contain a cohesive filler. By aggregating the aggregating filler, the uneven shape on the surface of the antiglare layer can be controlled more strictly. The aggregation state of the aggregating filler is 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 antiglare layer forming composition), the antiglare layer forming composition. It can adjust with the kind etc. of the solvent contained in a thing.

  Examples of the aggregating filler include organic clay, oxidized polyolefin, and modified urea. Of these, organic clay is preferable.

  Examples of the organic clay include smectite, talc, bentonite, montmorillonite, and kaolinite. Of these, smectite is preferable. Commercial products may be used as the organic clay. Examples of commercially available organic clays include trade name “Lucentite SAN”, trade name “Lucentite STN”, trade name “Lucentite SEN”, trade name “Lucentite SPN”, trade name “ Somasif ME-100, product name “Somasif MAE”, product name “Somasif MTE”, product name “Somasif MEE”, product name “Somasif MPE”; product name “Esven”, product name “Esven C” manufactured by Hojung , Product name “Esven E”, product name “Esven W”, product name “Esven P”, product name “Esven WX”, product name “Esven N-400”, product name “Esven NX”, product name “Esven NX80” ”, Product name“ Esven No12S ”, product name“ Esbene NEZ ”, product name“ Esbene NO12 ”, product name“ Esbene NE ”, product name“ Esbene NE ” Ben NZ, trade name “Sven NZ70”, trade name “Organite”, trade name “Organite D”, trade name “Organite T”; trade name “Kunipia F”, trade name “Kunipia F” manufactured by Kunimine Industries, Ltd. G ”, trade name“ Kunipia G4 ”; trade name“ Thixogel VZ ”manufactured by Rockwood Additives, trade name“ Clayton HT ”, trade name“ Clayton 40 ”, and the like.

  Examples of the oxidized polyolefin include trade name “Disparon 4200-20” manufactured by Enomoto Kasei Co., Ltd., and trade name “Flownon SA300” manufactured by Kyoeisha Chemical Co., Ltd.

The modified urea is a reaction product of an isocyanate monomer or an adduct thereof and an organic amine. Examples of the modified urea include a trade name “BYK410” manufactured by Big Chemie.

  The content of the aggregating filler is preferably 0.2 to 5 parts by weight, more preferably 0.4 to 4 parts by weight with respect to 100 parts by weight of the binder resin.

  The antiglare layer forming composition preferably contains any appropriate photopolymerization initiator. Examples of the photopolymerization initiator include 2,2-dimethoxy-2-phenylacetophenone, acetophenone, benzophenone, xanthone, 3-methylacetophenone, 4-chlorobenzophenone, 4,4′-dimethoxybenzophenone, benzoinpropyl ether, benzyldimethyl Ketals, N, N, N ′, N′-tetramethyl-4,4′-diaminobenzophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, thioxanthone compounds, etc. Can be mentioned.

  Preferably, the composition for forming an antiglare layer contains 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; methyl acetate, ethyl acetate, butyl acetate, and the like. Esters; 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 hexane, heptane and octane; benzene and toluene And aromatic hydrocarbons such as xylene. These may be used alone or in combination. Of these, it is preferable to use cyclopentanone, methyl ethyl ketone, toluene and / or xylene.

  In one embodiment, a mixed solvent containing cyclopentanone and / or methyl ethyl ketone (for example, a mixed solvent containing cyclopentanone and toluene, or a mixed solvent containing methyl ethyl ketone and toluene) is used as the solvent. If such a mixed solvent is used, the thickness of the intermediate layer can be adjusted by the content ratio of cyclopentanone or methyl ethyl ketone. The content ratio 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 with respect to the total amount of the mixed solvent. More preferably, it is a mixed solvent of cyclopentanone and toluene, and a mixed solvent having a cyclopentanone content of 1 wt% to 50 wt% is used. If a composition for forming an antiglare layer containing such a mixed solvent is used, an intermediate layer having a preferable thickness is formed on a resin film (for example, a triacetylcellulose film) suitable as a transparent substrate layer for an antiglare film. However, an antiglare layer can be formed.

In one embodiment, the SP value of the solvent is preferably 7 to 12 (cal / cm ³ ) ^1/2 , more preferably 8 to 11 (cal / cm ³ ) ^1/2 . Within such a range, an antiglare layer is formed while forming an intermediate layer having a preferred thickness with respect to a resin film (for example, a triacetylcellulose film) suitable as a transparent substrate layer of the antiglare film. Can do. The SP value is a solubility parameter calculated by the Small formula. The SP value can be calculated by a method described in a known document (for example, Journal of Applied Chemistry, 3, 71, 1953., etc.). When the solvent is a mixed solvent, the SP value of the mixed solvent can be calculated based on the molar 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 further preferably 30% by weight to 50% by weight. is there.

  The composition for forming an antiglare layer may further contain any appropriate additive. Examples of additives include leveling agents, anti-blocking agents, dispersion stabilizers, thixotropic agents, antioxidants, UV absorbers, antifoaming agents, thickeners, dispersants, surfactants, catalysts, lubricants, and electrification. An inhibitor etc. are mentioned.

  The antiglare layer can be obtained by applying the antiglare layer forming composition to a resin film and then curing it. During the coating step, a compatible region is formed between the resin film and the composition for forming an antiglare layer (specifically, the curable compound and / or solvent in the composition), and the curing step is performed. As a result, the compatible region can be an intermediate layer. Any appropriate method can be adopted as a method for applying the composition for forming an antiglare layer. Examples thereof include a bar coating method, a roll coating method, a gravure coating method, a rod coating method, a slot orifice coating method, a curtain coating method, a fountain coating method, and a comma coating method.

  In one embodiment, after the composition for forming an antiglare layer is applied to a resin film, the resin film on which the coating layer is formed is tilted or rotated before being cured (or during the curing process). . When the composition for forming an antiglare layer contains a cohesive filler, by performing such an operation, the contact between the cohesive fillers is promoted, and the cohesive filler can be appropriately aggregated (shear aggregation). it can. For example, the aggregation state of the cohesive filler can be controlled by adjusting the inclination angle or the rotation speed in the above inclination or rotation.

Arbitrary appropriate hardening processing may be employ | adopted as a hardening method of the said composition for anti-glare layer formation. Typically, the curing process is performed by ultraviolet irradiation. Integrated light quantity of ultraviolet irradiation is preferably ^{50mJ / cm 2 ~500mJ / cm 2} .

  One surface of the antiglare layer is preferably an uneven surface. The average spacing Sm between the uneven surfaces is preferably 150 μm to 350 μm, more preferably 160 μm to 300 μm, and further preferably 180 μm to 250 μm.

  The average inclination angle θa of the uneven surface is preferably 0.1 ° to 2.5 °, more preferably 0.2 ° to 2.0 °, and still more preferably 0.3 ° to 1.5 °. °.

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

In addition, the definition of the average space | interval Sm of uneven | corrugated surface, average inclination | tilt angle (theta) a, and arithmetic surface roughness Ra is based on JISB0601 (1994 edition). These characteristic values can be measured with a stylus type surface roughness measuring instrument (for example, Kosaka Laboratory, high-precision fine shape measuring instrument, trade name “Surfcoder ET4000”). The average inclination angle θa is a value defined by the equation θa = tan ⁻¹ Δa. Δa is the sum (h1 + h2 + h3 +... + Hn) of the difference (height h) between the apex of the adjacent convex portion and the lowest point of the concave portion in the roughness curve defined in JIS B 0601 (1994 edition). ) Minus the reference length L of the roughness curve, that is, expressed by the equation: Δa = (h1 + h2 + h3 +... + Hn) / L.

  The antiglare film of the present invention is provided with an antiglare layer having the above surface shape (average interval Sm of uneven surfaces, average inclination angle θa, arithmetic surface roughness Ra), and thus has excellent antiglare properties and transparency. The glare can be suppressed while maintaining the properties. In particular, by setting all of the average interval Sm, the average inclination angle θa, and the arithmetic surface roughness Ra within the above ranges, a relatively thick optical member (eg, glass, polarizing plate, retardation film) is formed on the back surface of the antiglare film. A glare-suppressing effect can also be obtained for an image display device that is arranged and has a long distance between the viewing surface and an image display cell (for example, a liquid crystal cell). The surface shape of the antiglare layer is, for example, the type, particle size and / or content of particles contained in the antiglare layer, the relationship between the antiglare layer and the particle size of particles, and the type and / or content of cohesive fillers. The solid content concentration of the composition for forming an antiglare layer can be controlled.

  Preferably, the average spacing Sm (μm), the average inclination angle θa (°) and the arithmetic surface roughness Ra (μm) of the uneven surfaces show a relationship of 0 ≦ Ra / Sm × θa × 1000 ≦ 4, more preferably The relationship 0.1 ≦ Ra / Sm × θa × 1000 ≦ 3.6 is shown, and the relationship 0.15 ≦ Ra / Sm × θa × 1000 ≦ 2.5 is more preferable. The effect of the present invention becomes more prominent when the relationship between the average interval Sm (μm), the average inclination angle θa (°), and the arithmetic surface roughness Ra (μm) is the above specific relationship.

  The haze of the antiglare layer is preferably less than 40%, more preferably 35% or less, and further preferably 10% to 30%. According to the present invention, the antiglare film has an excellent antiglare property and an excellent glare suppressing effect without impairing the transparency of the antiglare layer, that is, without increasing the haze of the antiglare layer. Can be obtained. Haze can be measured according to JIS K 7136 (2000 version).

C. Transparent substrate layer The transparent substrate layer may be formed of a resin film. A transparent base material layer corresponds to the part in which the intermediate | middle layer was not formed in the resin film. As a resin film which comprises a transparent base material layer, arbitrary appropriate films may be used as long as it has visible light transmittance. Examples of the resin film include resin films composed of triacetyl cellulose (TAC) resin, polycarbonate resin, acrylic resin, cyclic polyolefin resin, polyolefin having norbornene structure, polyethylene terephthalate resin, and the like. . Among these, a resin film composed of a triacetyl cellulose (TAC) resin is preferable.

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, and even more preferably 20 ( cal / cm ³ ) ^1/2 or more. Within 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 / cm ³ ) ^1/2 or less, preferably 28 (cal / cm ³ ) ^1/2 or less, more preferably 25 (cal / cm ^3). ) ^1/2 or less. In one embodiment, the difference between the SP value of the solvent contained in the antiglare layer forming composition and the SP value of the resin constituting the resin film (resin SP value−solvent SP value) is preferably -10~20 (cal ^/ cm ^{3) 1/2,} more preferably ^{5~20 (cal / cm 3) 1/2} , 10~14 (cal / cm 3) ^1/2.

  The refractive index of the transparent substrate layer is preferably 1.30 to 1.80.

D. Image Display Device FIG. 3 is a schematic sectional view showing a part of an example of an image display device using the antiglare film of the present invention. The image display device 200 includes an antiglare film 100 and an image display cell 40. Preferably, the antiglare film 100 is disposed with the transparent substrate layer 10 facing the image display cell 40 side. Any appropriate optical member A can be disposed between the antiglare film 100 and the image display cell 40, and a predetermined gap X is formed between the antiglare layer 30 and the image display cell 40. 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 40, or a plurality of types of optical members may be disposed.

  Any appropriate image display cell may be used as the image display cell. For example, when the image display device is a liquid crystal display device, a liquid crystal cell corresponds to the image display cell, and when the image display device is an organic EL image display device, an organic EL element corresponds to the image display cell. A liquid crystal cell typically 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 μm to 700 μm. If a relatively thick glass substrate is provided and the gap X is 100 μm or more, an image display device having excellent heat resistance and strength can be obtained. The lower limit of the gap X is more preferably 150 μm or more. By increasing the thickness of the glass substrate, the effect of improving heat resistance and strength becomes remarkable. Since the antiglare film of the present invention can suppress glare even when the gap X is large, if the antiglare film is used, both heat resistance and strength can be improved and glare can be suppressed. The optical member that defines the gap X is not limited to a glass substrate, and any appropriate member may be disposed. Therefore, the effect of increasing the gap X is not limited to the improvement of heat resistance and strength. According to the present invention, since the restriction on the thickness is small, it is possible to provide an image display device with a high degree of design freedom. On the other hand, when the gap X is 700 μm or less, an image display device with less glare can be obtained. The upper limit of the gap X is more preferably 650 μm or less. If the gap X is 650 μm or less, an image display device with less glare can be obtained. The gap X between the antiglare layer and the image display cell in the antiglare film is the back surface of the antiglare layer (surface on the image display cell side) and the viewing side surface (surface on the antiglare film side) of the image display cell. It means the distance to make. Therefore, the gap X includes the total thickness of the optical member A (for example, the total thickness of the polarizing plate, the glass substrate and / or the pressure-sensitive adhesive layer) disposed between the antiglare film 100 and the image display cell 40, and the antiglare. This corresponds to the total thickness of the transparent base material layer and the intermediate layer in the film. Further, when the image display cell is a liquid crystal cell, the gap X is the distance between the viewing side surface of the viewing side substrate provided in the liquid crystal cell and the back surface of the antiglare layer.

  More specifically, the antiglare film of the present invention is suitably used for an image display device including a relatively thick glass substrate (for example, a glass substrate having a thickness of 100 μm to 700 μm). Conventionally, in applications that require heat resistance, strength, and the like (for example, in-vehicle applications), the heat resistance is increased by increasing the thickness of the glass substrate. However, the inventors of the present invention have found that as the glass substrate is made thicker, that is, as the gap X is made thicker, the glare that occurs when an antiglare film is applied increases. . That is, the anti-glare film of the present invention can solve the problem and can be suitably used for an image display device for in-vehicle use. Moreover, the effect of using the anti-glare film of this invention becomes more remarkable with respect to a high-definition image display apparatus.

  The image display device may further include any appropriate member. For example, it may further include a polarizing plate, an optical film, a backlight and the like provided on the back side of the image display cell.

EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited by these Examples. The evaluation methods in the examples are as follows.
(1) Weight average particle diameter of particles The weight average particle diameter of the particles was measured by a Coulter counting method. Specifically, for a composition for forming an antiglare layer, a particle size distribution measuring device using a pore electrical resistance method (Beckman Coulter, trade name “Coulter Multisizer”) is used, and the particles pass through the pores. The number and volume of the particles were measured by measuring the electric resistance of the electrolytic solution corresponding to the volume of the particles at the time, and the weight average particle size was calculated.
In addition, “| D ₉₀ -D ₅₀ |” of the particle is D ₅₀ (particle diameter at 50% cumulative volume) obtained by a laser diffraction scattering type particle size distribution measurement method using “MicrotracUPA (model number)” manufactured by Nikkiso Co., Ltd. And the absolute value of the difference between the volume cumulative particle diameter D ₉₀ (particle diameter at 90% volume cumulative).

(2) Thickness of each layer The thickness of each layer was measured by observing the cross section with an optical microscope (manufactured by Keyence Corporation, trade name “VHX-700F”) or TEM (manufactured by Hitachi, trade name “H-7650”). At the time of observation with an optical microscope, the antiglare film embedded with resin was cut with a microtome to produce an observation sample. Moreover, in the case of observation by TEM, the sample was produced by the ultrathin section method including a heavy metal dyeing process.

(3) Refractive index The refractive index is measured using an Abbe refractometer (trade name: DR-M2 / 1550) manufactured by Atago Co., Ltd. The measurement was carried out by the prescribed measurement method shown in the apparatus.

(4) Evaluation of glare A glass plate (thickness: 700 μm) is placed on a backlight (trade name “Light Viewer 5700” manufactured by Hakuba Photo Industry Co., Ltd.), and a black surface is provided on the surface opposite to the backlight of the glass plate. An evaluation table was prepared by arranging a matrix pattern.
On this evaluation table, four TAC films (thickness: 80 μm) and four pressure-sensitive adhesive layers (thickness: 20 μm) are alternately laminated as a member A constituting a part of the gap X, and further a TAC film. (Thickness: 40 μm) and an adhesive layer (thickness: 20 μm) were laminated.
On the member A, the antiglare films obtained in Examples and Comparative Examples were disposed with the transparent substrate layer facing down (that is, the pressure-sensitive adhesive layer and the transparent substrate layer facing each other). . Such a configuration is a configuration for evaluating the glare when the gap X is 500 μm (= TAC 80 μm × 4 + TAC 40 μm × 1 + adhesive layer 20 μm × 5 + total of transparent substrate layer and intermediate layer 40 μm).
Subsequently, the glare produced in the antiglare film was evaluated according to the following criteria by irradiating the antiglare film with light.
The definition of the black matrix pattern was 105 ppi, 200 ppi, and 267 ppi, and the above evaluation was performed for each definition.
A: No glare B: Little glare C: Some glare, but no problem in practical use D: There is glare, but there is no problem in practical use E: Problem in practical use There was glare with

(5) Anti-glare layer irregular surface shape (Ra, Sm, θa)
According to JIS B0601 (1994 version), the average inter-protrusion distance Sm (mm) and the arithmetic average surface roughness Ra (μm) were measured. Specifically, a glass plate (manufactured by MATSANAMI, MICRO SLIDE GLASS, product number S, thickness 1.3 mm, 45 × 50 mm) is adhered to the surface of the transparent base layer of the antiglare film opposite to the antiglare layer. A sample was prepared by laminating with an agent. Using a stylus type surface roughness measuring instrument (manufactured by Kosaka Laboratory Ltd., high-precision fine shape measuring instrument, trade name “Surfcoder ET4000”) having a measuring needle having a radius of curvature R = 2 μm at the tip (diamond). The surface shape of the antiglare layer in the sample was measured in a certain direction under the conditions of a scanning speed of 0.1 mm / second, a cut-off value of 0.8 mm, and a measurement length of 4 mm. The surface roughness Ra was determined. Moreover, average inclination | tilt angle (theta) a (degree) was calculated | required from the obtained surface roughness curve. The high-precision fine shape measuring instrument automatically calculates the measured values.

(6) Haze value (overall haze)
According to the haze (cloudiness) of JIS K 7136 (2000 version), it was measured using a haze meter (manufactured by Murakami Color Research Laboratory, trade name “HM-150”).
(Internal haze)
The haze value of an evaluation sample obtained by sticking a triacetyl cellulose (TAC) film to the surface of the antiglare layer of the antiglare film (the surface opposite to the transparent substrate layer) was measured by the above method. The obtained value was defined as internal haze.

(7) White blur A black acrylic plate (Mitsubishi Rayon Co., Ltd., thickness: 2 mm) is bonded to the surface of the transparent base layer opposite to the antiglare layer with an adhesive to suppress the influence of back surface reflection. An evaluation sample was prepared.
In an environment with an illuminance of 1000 Lx (corresponding to a general office environment using a display), the degree of white blurring is visually observed from a direction of 60 ° with respect to the upper surface of the evaluation sample, with the vertical direction as a reference (0 °). And evaluated according to the following evaluation criteria.
○: No white blurring is observed. ×: White blurring is so strong that the visibility is significantly reduced.

(8) Antiglare property A black acrylic plate (Mitsubishi Rayon Co., Ltd., thickness: 2 mm) is bonded to the surface of the transparent base layer opposite to the antiglare layer with an adhesive to suppress the influence of back surface reflection. An evaluation sample was prepared.
In an environment with an illuminance of 1000 Lx (corresponding to a general office environment using a display), the evaluation sample is illuminated with a fluorescent lamp (three-wavelength light source), and the antiglare property of the antiglare film is visually evaluated according to the following evaluation criteria. did.
○: Image reflection that affects the visibility does not occur ×: Image reflection occurs, causing practical problems

(9) Appearance An anti-glare film 1 m ² was prepared as an evaluation sample, and light from a fluorescent lamp (100 Lx) was transmitted through the film in a dark room, and the appearance was confirmed visually at a distance of 30 cm. Observe the observed appearance defects using a magnifying loupe, measure the size (maximum diameter) of the appearance defects, and check for foreign matter, bubbles and scratches of 100 μm or more, and bumps (projections) of 200 μm or more. The number was counted.
◯: There is no spot of 200 μm or more, foreign matter, bubbles or scratches of 100 μm or more. Also, black tightening is good.
X: Scratches of 200 μm or more and foreign matter / bubbles / scratches of 100 μm or more are observed. Also, white blur can be seen.

(10) Transmittance Using a spectrophotometer (U-4100) manufactured by Hitachi High-Tech, a transmittance spectrum was measured in the wavelength range of 200 nm to 800 nm, and the transmittance at a wavelength of 380 nm was read. The size of the sample for evaluation was 50 mm square.
○: Transmittance is 90% or more ×: Transmittance is less than 90%

[Example 1]
50 parts by weight of pentaerythritol triacrylate (PETA; made by Osaka Organic Chemical Co., Ltd., trade name “Biscoat # 300”) as a binder resin and urethane acrylate prepolymer (made by Shin-Nakamura Chemical Co., Ltd., trade name “UA-53H-80BK”) ) 50 parts by weight and silicone particles (made by Momentive Performance Materials Japan G.K., trade name “Tospearl 130”, weight average particle size: 3 μm, | D ₉₀ -D ₅₀ |: 2.5 μm, refractive index: 1.42) 3.5 parts by weight, 2 parts by weight of synthetic clay synthetic smectite (trade name “Lucentite SAN”, manufactured by Corp Chemical Co.) and photopolymerization initiator (BASF Corporation, trade name “IRGACURE 907”) ") 3 parts by weight and leveling agent (manufactured by DIC, trade name" PC4100 ", solid content 10%) 0 2 parts by weight, and diluted with a toluene / cyclopentanone (CPN) mixed solvent (weight ratio toluene / cyclopentanone = 70/30) to form a composition for forming an antiglare layer having a solid content of 33% by weight I was prepared. The organic clay was diluted with toluene so that the solid content was 6% by weight.
The anti-glare layer forming composition I was applied to a triacetyl cellulose (TAC) film (trade name “KC4UA”, manufactured by Konica Minolta Opto, Inc., thickness: 40 μm) using a comma coater (registered trademark), and 80 ° C. After heating for 1 minute at a high pressure mercury lamp, an ultraviolet ray with an integrated light quantity of 300 mJ / cm ² is irradiated to provide a transparent base layer and an antiglare layer (thickness: 6.3 μm). An antiglare film was obtained in which an intermediate layer having a thickness of 1.7 μm was formed between the glare layer. The refractive index of the region composed of the binder resin in the antiglare layer was 1.53.
The obtained antiglare film was subjected to the evaluations (4) to (10) above. The results are shown in Tables 1 and 2.

[Example 2]
Instead of 3.5 parts by weight of silicone particles (Momentive Performance Materials Japan G.K., trade name “Tospearl 130”), polystyrene particles (Sekisui Plastics Co., Ltd., trade name “Tech Polymer”, weight average) Particle size: 3 μm, | D ₉₀ -D ₅₀ |: 2.5 μm, refractive index: 1.59) Using 5 parts by weight, toluene / cyclopentanone (CPN) mixed solvent (weight ratio toluene / cyclopentanone = 70 In place of / 30), an antiglare layer-forming composition II was prepared using a toluene / cyclopentanone (CPN) mixed solvent (weight ratio toluene / cyclopentanone = 50/50), and the anti-glare layer An antiglare film (antiglare layer thickness: 4 μm, intermediate layer thickness: 4 μm) was prepared in the same manner as in Example 1 except that the solid content concentration of the composition II for forming the glare layer was 35% by weight. It was. The refractive index of the region composed of the binder resin in the antiglare layer was 1.53.
The obtained antiglare film was subjected to the evaluations (4) to (10) above. The results are shown in Tables 1 and 2.

[Example 3]
The blending amount of pentaerythritol triacrylate (PETA; Osaka Organic Chemical Co., Ltd., trade name “Biscoat # 300”) is 90 parts by weight, and urethane acrylate prepolymer (Shin Nakamura Chemical Co., Ltd., trade name “UA-53H-80BK” is used. )) In an amount of 10 parts by weight, silicone particles (Momentive Performance Materials Japan G.K., trade name “Tospearl 130”) in an amount of 4.25 parts by weight, and a photopolymerization initiator (BASF). Other than having prepared the composition III for forming the antiglare layer so that the blending amount of the product name “Irgacure 907”) is 2.5 parts by weight and the solid content concentration is 31.5% by weight, In the same manner as in Example 1, an antiglare film (antiglare layer thickness: 4.8 μm, intermediate layer thickness: 3.2 μm) was obtained. The refractive index of the region composed of the binder resin in the antiglare layer was 1.53.
The obtained antiglare film was subjected to the evaluations (4) to (10) above. The results are shown in Tables 1 and 2.

[Example 4]
The blending amount of pentaerythritol triacrylate (Osaka Organic Chemical Co., Ltd., trade name “Biscoat # 300”) is 10 parts by weight, and urethane acrylate prepolymer (Shin Nakamura Chemical Co., Ltd., trade name “UA-53H-80BK”). An antiglare film (antiglare layer thickness: 6.8 μm, intermediate layer thickness: 1.2 μm) was obtained in the same manner as Example 3 except that the amount was 90 parts by weight. The refractive index of the region composed of the binder resin in the antiglare layer was 1.53.
The obtained antiglare film was subjected to the evaluations (4) to (10) above. The results are shown in Tables 1 and 2.

[Example 5]
Pentaerythritol triacrylate (trade name “Biscoat # 300” manufactured by Osaka Organic Chemical Co., Ltd.) is used in an amount of 50 parts by weight, and urethane acrylate prepolymer (trade name “UA-53H-80BK” manufactured by Shin-Nakamura Chemical Co., Ltd.) 50 parts by weight, and instead of a toluene / cyclopentanone mixed solvent (weight ratio toluene / cyclopentanone = 70/30), a toluene / cyclopentanone mixed solvent (weight ratio toluene / cyclopentanone = 97/3) ) Was used in the same manner as in Example 3 to obtain an antiglare film (antiglare layer thickness: 7.6 μm, intermediate layer thickness: 0.4 μm). The refractive index of the region composed of the binder resin in the antiglare layer was 1.53.
The obtained antiglare film was subjected to the evaluations (4) to (10) above. The results are shown in Tables 1 and 2.

[Comparative Example 1]
Pentaerythritol triacrylate (trade name “Biscoat # 300” manufactured by Osaka Organic Chemical Co., Ltd.) is used in an amount of 50 parts by weight, and urethane acrylate prepolymer (trade name “UA-53H-80BK” manufactured by Shin-Nakamura Chemical Co., Ltd.) 50 parts by weight, and instead of a toluene / cyclopentanone mixed solvent (weight ratio toluene / cyclopentanone = 70/30), a toluene / cyclopentanone mixed solvent (weight ratio toluene / cyclopentanone = 40/60) ) Was used in the same manner as in Example 3 to obtain an antiglare film (antiglare layer thickness: 2.8 μm, intermediate layer thickness: 5.2 μm). The refractive index of the region composed of the binder resin in the antiglare layer was 1.53.
The obtained antiglare film was subjected to the evaluations (4) to (6) above. The results are shown in Tables 1 and 2.

  As is clear from Table 1, the antiglare film of the present invention has excellent antiglare properties and transparency and suppresses glare because the thickness ratio of the intermediate layer to the thickness of the antiglare layer is within a specific range. Can do.

[Reference Examples 1-E1 to E5, 1-C1]
In the same manner as in Examples 1 to 5 and Comparative Example 1, an antiglare film was obtained, and the glare of each of the antiglare films was evaluated as follows.
An evaluation table was prepared in the same manner as in the evaluation (4).
On this evaluation table, a pressure-sensitive adhesive layer (thickness: 30 μm) was disposed as a member A constituting a part of the gap X.
On the member A, the antiglare films obtained in Examples and Comparative Examples were disposed with the transparent substrate layer facing down (that is, the pressure-sensitive adhesive layer and the transparent substrate layer facing each other). . Such a configuration is a configuration for evaluating glare when the gap X is 70 μm (= 30 μm of the pressure-sensitive adhesive layer + 40 μm in total of the transparent base material layer and the intermediate layer).
With such a configuration, the same evaluation as in the above evaluation (4) was performed. The results are shown in Table 3.

[Reference Examples 2-E1 to E5, 2-C1]
In the same manner as in Examples 1 to 5 and Comparative Example 1, an antiglare film was obtained, and the glare of each of the antiglare films was evaluated as follows.
An evaluation table was prepared in the same manner as in the evaluation (4).
On this evaluation table, seven TAC films (thickness: 80 μm) and seven pressure-sensitive adhesive layers (thickness: 20 μm) are alternately laminated as a member A constituting a part of the gap X, and further a TAC film. (Thickness: 40 μm) and an adhesive layer (thickness: 20 μm) were laminated.
On the member A, the antiglare films obtained in Examples and Comparative Examples were disposed with the transparent substrate layer facing down (that is, the pressure-sensitive adhesive layer and the transparent substrate layer facing each other). . Such a configuration is a configuration for evaluating glare when the gap X is 800 μm (= TAC 80 μm × 7 + TAC 40 μm × 1 + adhesive layer 20 μm × 8 + total of the transparent base layer and the intermediate layer is 40 μm).
With such a configuration, the same evaluation as in the above evaluation (4) was performed. The results are shown in Table 3.

  As is apparent from Tables 1 and 3, the image display device using the antiglare film of the present invention exhibits a remarkable glare-suppressing effect when the gap X is in a specific range. An image display device having a thick glass substrate and a gap X of 100 μm or more is excellent in durability.

DESCRIPTION OF SYMBOLS 10 Transparent base material layer 20 Intermediate | middle layer 30 Anti-glare layer 100 Anti-glare film

Claims (5)

A transparent substrate layer;
An anti-glare layer disposed on at least one side of the transparent substrate layer, comprising a binder resin and particles;
An intermediate layer formed between the transparent base material layer and the antiglare layer and comprising at least a part of the material constituting the transparent base material layer and at least a part of the binder resin;
The thickness of the intermediate layer is 0.1% to 123% with respect to the thickness of the antiglare layer.
Antiglare film.   The anti-glare film according to claim 1, wherein a ratio (n2 / n1) of a refractive index (n2) of the particles to a refractive index (n1) of the binder resin is 0.8 to 1.2. The transparent substrate layer is formed from a resin film;
The antiglare layer is formed using a composition for forming an antiglare layer containing a curable compound, particles and a solvent,
The difference between the SP value of the solvent and the SP value of the resin constituting the resin film (resin SP value−solvent SP value) is −10 to 20 (cal / cm ³ ) ^1/2 .
The antiglare film according to claim 1 or 2.   The ratio of the thickness of the antiglare layer to the weight average particle diameter of the particles (the weight average particle diameter of the particles / the thickness of the antiglare layer) is 0.15 to 2.0. The antiglare film according to any one of the above. An antiglare film according to any one of claims 1 to 4, and an image display cell disposed on one side of the antiglare film,
The antiglare film is disposed with the transparent substrate layer facing the image display cell,
A gap is formed between the intermediate layer and the image display cell, and the size of the gap is 100 μm to 700 μm.
Image display device.