JP2018004738A - Optical film and method for manufacturing the same, and information display device and on-vehicle information display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antiglare film that achieves both high hardness and suppression of warpage without causing the occurrence of unevenness in video displayed on a display.SOLUTION: The present invention is an antiglare film including a hard coat layer (B) on at least one side of a substrate (A); the hard coat layer (B) is a layer that contains hydrophobic wet silica (b1) having an average particle diameter of 0.2 μm or less and particles (b2) having an average particle diameter of more than 0.2 μm.SELECTED DRAWING: None

Description

  The present invention relates to an optical film such as an antireflection film.

  Various functional layers are provided on the outermost surface of an image display device such as a cathode ray tube display (CRT), a liquid crystal display (LCD), a plasma display (PDP), or an electroluminescence display (ELD).

  As the functional layer, for example, a functional layer having both hard coat properties and anti-glare properties is known, and as the functional layer, an uneven surface can be formed by containing particles such as organic resin beads. An image display device having a functional layer is known (see, for example, Patent Document 1).

  In order to form a layer having a practically sufficient antiglare property as the functional layer, it is necessary to use a large amount of particles such as organic resin beads having a relatively large particle diameter. However, since the particles tend to settle in the antiglare layer forming composition, when the antiglare layer is formed using the antiglare layer forming composition, the composition of the layer becomes nonuniform. As a result, there are cases where unevenness of the image displayed on the display or the like, warpage, hardness reduction, or the like is caused.

JP 2004-69867 A

  The problem to be solved by the present invention is to provide an antiglare film that achieves both high hardness and suppression of warpage without causing unevenness of the image displayed on the display or reducing the antiglare property. is there.

  The present inventors are antiglare films having a hard coat layer (B) on at least one surface side of the substrate (A), and the hard coat layer (B) has an average particle size of 0.2 μm or less. The above problems have been solved by an antiglare film characterized by being a layer containing hydrophobic wet silica (b1) and particles (b2) having an average particle diameter of more than 0.2 μm.

  Since the anti-glare film of the present invention is a film that achieves both high hardness and suppression of warpage without causing unevenness of the image displayed on the display or a decrease in anti-glare property, such as a liquid crystal display or the like. It can be used by being attached to an image display surface of an image display device, particularly an in-vehicle image display device.

  The antiglare film of the present invention is an antiglare film having a hard coat layer (B) on at least one surface side of the substrate (A), and the hard coat layer (B) has an average particle diameter of 0.2 μm. It is a layer containing the following hydrophobic wet silica (b1) and particles (b2) having an average particle diameter of more than 0.2 μm.

  As a base material (A) which comprises the anti-glare film of this invention, what was equipped with the transparency of the level which can be generally used for an optical use can be used.

  Examples of the base material (A) include polyester base materials such as polyethylene terephthalate base materials and polyethylene naphthalate base materials, cellulose base materials such as triacetyl cellulose, polyethylene base materials, polypropylene base materials, polystyrene base materials, ethylene- Vinyl-based resin base materials such as vinyl acetate resin (EVA) base materials, polyvinyl chloride base materials, polyvinylidene chloride base materials, polysulfone base materials, polyether sulfone base materials, polycarbonate base materials, polyamide base materials, polyimide base materials A plastic substrate such as an acrylic resin substrate, a glass plate, a ceramic plate, or the like can be used.

  Especially, it is preferable to use a polyethylene terephthalate base material, a triacetyl cellulose base material, etc. as said base material (A).

  As described above, it is preferable to use a highly transparent material as the base material (A). Specifically, it is preferable to use a material having a total visible light transmittance of 70% or more. As the base material, those colored in a range where the above level of transparency can be maintained can be used.

  As the base material (A), it is preferable to use a material having a thickness of 5 μm to 300 μm in order to achieve both excellent transparency and good handleability, and a material having a thickness of 10 μm to 250 μm is used. It is more preferable to use one having a thickness of 25 μm to 200 μm.

  In addition, as the substrate (A), a substrate composed of a single layer can be used, but a multilayer substrate composed of two or more layers composed of the same or different materials can also be used.

  In addition, as the base material (A), in order to further improve the adhesion with the hard coat layer (B), one having one or both surfaces subjected to an easy adhesion treatment can be used. Examples of the easy adhesion treatment method include a method of providing a primer layer on one side or both sides of the substrate (A).

  Next, the hard coat layer (B) constituting the antiglare film of the present invention will be described.

  As the hard coat layer (B), a layer containing hydrophobic wet silica (b1) having an average particle diameter of 0.2 μm or less and particles (b2) having an average particle diameter exceeding 0.2 μm is used.

  By using a combination of the hydrophobic wet silica (b1) and the particles (b2), the precipitation of the hydrophobic wet silica (b1) and particles (b2) in the hard coat layer (B) forming composition can be suppressed. As a result, a hard coat layer (B) that combines excellent anti-glare properties and hard coat properties (high hardness) without causing unevenness in the image displayed on the display or a decrease in anti-glare properties is formed. can do.

  As the hydrophobic wet silica, those having an arbitrary average particle diameter can be used. However, the hydrophobic wet silica is finely divided in the process of forming the resin composition for forming the hard coat layer (B) or the hard coat layer (B). When the resin composition for forming the coat layer (B) or the hard coat layer (B) is formed, it exists as hydrophobic wet silica (b1) having an average particle size of 0.2 μm or less in the vehicle (resin component). Use what you can.

  The resin composition for forming the hard coat layer (B) or the finely divided hydrophobic wet silica (b1) present in the hard coat layer (B) has an average particle size of 0.2 μm or less. The hydrophobic wet silica (b1) preferably has an average particle size of 0.02 μm to 0.8 μm in order to form a hard coat layer (B) having further excellent transparency.

  Here, the average particle size of the finely divided hydrophobic wet silica (b1) is obtained by mixing and dispersing the resin component constituting the hard coat layer (B) and the hydrophobic wet silica with a bead mill as described in the Examples. In a value obtained by measuring with a particle size measuring device ("ELSZ-2" manufactured by Otsuka Electronics Co., Ltd.) using a mixture of 0.5 parts by mass of the dispersion formed in this manner and 100 parts by mass of methyl ethyl ketone. is there.

  The hydrophobic wet silica (b1) may have a primary particle diameter of 0.001 μm to 0.1 μm, and 0.001 μm to 0.05 μm may be used for a display. It is more preferable to obtain an antiglare film having good sharpness and antiglare property of displayed images.

  As the hydrophobic wet silica (b1), for example, one obtained by hydrophobizing wet silica is used.

  As said wet silica, what was obtained by neutralizing sodium silicate with a mineral acid can be used, for example. Since the wet silica generally has a lot of hydrophilic silanol groups on the surface thereof, the wet silica alone has a resin component such as an active energy ray-curable compound contained in the hard coat layer (B) forming composition. The compatibility may be low and the dispersibility may not be sufficient.

  Therefore, the hydrophobic wet silica (b1) in which the silanol group of the wet silica and the hydrophobic compound are reacted by the hydrophobic treatment or the hydrophobic compound is adsorbed on the surface of the wet silica is used. Therefore, the above-described decrease in dispersibility can be suppressed.

  As the hydrophobic compound, silanes, silicones and the like can be used, and using polydimethylsiloxane has excellent compatibility with the active energy ray-curable compound and the like, and has good transparency. It is preferable because an antiglare film can be produced.

  The hydrophobic wet silica (b1) is preferably used in the range of 5 parts by mass to 200 parts by mass with respect to 100 parts by mass of the solid content of the resin component described later, and in the range of 5 parts by mass to 150 parts by mass. It is more preferable to use it in order to express a high hardness and a good coating film appearance (no coating streaks or unevenness) in a well-balanced manner.

  In the present invention, by using the specific hydrophobic wet silica (b1) excellent in dispersibility in the composition for forming the hard coat layer (B), the hydrophobic wet silica ( The bias of b1) and particles (b2) to be described later can be effectively suppressed, and as a result, it is possible to effectively suppress the decrease in the sharpness and the antiglare property of the image displayed on the display.

  Next, the particles (b2) contained in the hard coat layer (B) constituting the antiglare film of the present invention will be described.

  As the particle (b2), a resin composition for forming the hard coat layer (B) or particles that can exist in the hard coat layer (B) with an average particle diameter of more than 0.2 μm are used. By using the particles (b2) in combination with the hydrophobic wet silica (b1), sedimentation of the particles (b2) in the hard coat layer (B) forming composition can be suppressed. An antiglare film provided with a hard coat layer (B) that achieves both excellent antiglare properties and hard coat properties (high hardness) without causing unevenness of displayed images and a decrease in antiglare properties is obtained. be able to.

  As the particles (b2), those having an average particle diameter of more than 0.2 μm are used. As the particles (b2), it is preferable to use particles having an average particle diameter of more than 0.2 μm and not more than 10 μm and more preferably not less than 0.5 μm and not more than 8 μm in order to further improve the antiglare property. Is more preferable. Here, the average particle size is prepared by preparing a mixture of particles (b2) and methyl ethyl ketone (the mass ratio of particles (b2) in the entire mixture is 1% by mass), and a laser diffraction / scattering type particle size manufactured by Horiba, Ltd. The value (median diameter) obtained by converting the value measured by the distribution measuring device (LA-920) based on the particle size of ORIBA standard standard particles (polystyrene latex) is indicated.

  As the particles (b2), for example, those conventionally known as light diffusing agents can be used. Specifically, inorganic particles, organic particles, and particles in which an inorganic component and an organic component are combined are used. be able to. Examples of the composite particles include those in which the surface of inorganic particles is treated with an organic substance, and those in which the surface of organic particles is treated with an inorganic substance.

  Examples of the organic particles include polyurethane resin particles, polyvinyl chloride resin particles, polystyrene resin particles, polycarbonate resin particles, polyacrylonitrile resin particles, polyamide resin particles, silicone resin particles, polytetrafluoroethylene resin particles, and two types thereof. Particles or the like in which the above is combined can be used.

  As the inorganic particles, silica, zirconia, titanium oxide, tin oxide, antimony-doped tin oxide, phosphorus-doped tin oxide, barium titanate, zinc oxide, antimony-doped zinc oxide, and combinations of two or more thereof can be used. .

  Further, as the particles (b2), composite particles in which the components constituting the organic particles and the components constituting the inorganic particles are chemically bonded can be used, for example, conventionally known acrylic silicone particles, etc. Can be used.

  Further, as the particles (b2), composite particles in which a part or all of the surfaces of the inorganic particles are covered with components constituting organic particles can be used, for example, part or all of silica particles. Composite particles covered with polycarbonate resin can be used.

  Moreover, it is preferable to use what can be used as a light-diffusion agent as said particle | grain (b2), and using the polycarbonate resin particle among the said organic particles obtains the anti-glare film excellent in abrasion resistance. In addition, it is preferable.

  As the polycarbonate resin particles, polycarbonate resin particles obtained by reacting a dihydric phenol and a carbonate precursor by an interfacial polycondensation method or a melt transesterification method, a carbonate prepolymer is obtained by polymerizing by a solid phase transesterification method. The obtained polycarbonate resin particles, the polycarbonate resin particles obtained by polymerizing by a ring-opening polymerization method of a cyclic carbonate compound, and the like can be used.

  Examples of the dihydric phenol include hydroquinone, resorcinol, 4,4′-dihydroxydiphenyl, bis (4-hydroxyphenyl) methane, bis [(4-hydroxy-3,5-dimethyl) phenyl] methane, 1,1. -Bis (4-hydroxyphenyl) ethane, 1,1-bis (4-hydroxyphenyl) -1-phenylethane, 2,2-bis (4-hydroxyphenyl) propane (bisphenol A), 2,2-bis [ (4-hydroxy-3-methyl) phenyl] propane, 2,2-bis [(4-hydroxy-3,5-dimethyl) phenyl] propane, 2,2-bis [(3-isopropyl-4-hydroxy) phenyl ] Propane, 2,2-bis [(4-hydroxy-3-phenyl) phenyl] propane, 2,2-bis (4-hydride) Xylphenyl) butane, 2,2-bis (4-hydroxyphenyl) -3-methylbutane, 2,2-bis (4-hydroxyphenyl) -3,3-dimethylbutane, 2,4-bis (4-hydroxyphenyl) -2-methylbutane, 2,2-bis (4-hydroxyphenyl) pentane, 2,2-bis (4-hydroxyphenyl) -4-methylpentane, 1,1-bis (4-hydroxyphenyl) cyclohexane, 1, 1-bis (4-hydroxyphenyl) -4-isopropylcyclohexane, 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane, 9,9-bis (4-hydroxyphenyl) fluorene, 9 , 9-bis [(4-hydroxy-3-methyl) phenyl] fluorene, α, α′-bis (4-hydroxypheny ) -O-diisopropylbenzene, α, α′-bis (4-hydroxyphenyl) -m-diisopropylbenzene, α, α′-bis (4-hydroxyphenyl) -p-diisopropylbenzene, 1,3-bis (4 -Hydroxyphenyl) -5,7-dimethyladamantane, 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl ketone, 4, Examples thereof include 4′-dihydroxydiphenyl ether and 4,4′-dihydroxydiphenyl ester. These may be used alone or in combination of two or more.

  Examples of the carbonate precursor include carbonyl halide, carbonate ester, haloformate, and the like. Specific examples include phosgene, diphenyl carbonate, dihaloformate of dihydric phenol, and the like.

  As the polycarbonate resin particles, those having an aromatic ring are preferably used for obtaining an antiglare film having high hardness and excellent scratch resistance.

  As the polycarbonate resin particles, it is preferable to use particles having an irregular shape whose surface is uneven in order to obtain an antiglare film having uniform light diffusibility and reduced glare.

  As the polycarbonate resin particles, those having a number average molecular weight of 5,000 to 100,000 are preferably used, and those having 10,000 to 50,000 prevent the solvent from absorbing and swelling. As a result, it is preferable for preventing a decrease in light diffusibility.

  Moreover, as said particle | grain (b2), it is preferable to use the composite resin particle which the silica disperse | distributed to the surface or inside of the said polycarbonate resin particle, when making a hard-coat layer (B) still higher hardness.

  As the composite particles, it is preferable to use particles in which polycarbonate and silica are combined in a mass ratio of [polycarbonate / silica] = 1/99 to 99/1, and in a range of 20/80 to 80/20. It is more preferable to use composite particles in order to achieve both high hardness and good coating film appearance (no coating lines or unevenness).

  The particles (b2) are preferably used in the range of 0.1 to 100 parts by mass with respect to 100 parts by mass of the solid content of the resin component described later, and used in the range of 1 to 20 parts by mass. It is more preferable in order to achieve a further excellent antiglare effect.

  The hydrophobic wet silica (b1) and the particles (b2) are preferably used in a range where the mass ratio [hydrophobic wet silica (b1) / particles (b2)] is 0.1 to 200. It is more preferable to use in the range of 2 to 150 in order to achieve both high hardness and good coating film appearance (no coating streaks or unevenness).

  The hard coat layer (B) can be formed using a resin composition containing a resin component other than the hydrophobic wet silica (b1) and the particles (b2).

  As the resin component, urethane acrylate, polyester acrylate, and acrylic acrylate can be used.

  As the resin component, it is preferable to use one having a functional group that can be polymerized by irradiation with active energy rays such as ultraviolet rays, and examples of the functional group include a (meth) acryloyl group.

  As the resin component, it is preferable to use one having 3 or more of the (meth) acryloyl groups in one molecule, and using 3 to 15 ones has high hardness and excellent scratch resistance. It is preferable for obtaining an antiglare film.

  As the resin composition used for the production of the hard coat layer (B), it is preferable to use a polyfunctional (meth) acrylate or a thermosetting resin as required in addition to the resin component. .

  Examples of the polyfunctional acrylate include 1,2-ethanediol diacrylate, 1,2-propanediol diacrylate, 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, and dipropylene glycol diacrylate. , Neopentyl glycol diacrylate, tripropylene glycol diacrylate, trimethylolpropane triacrylate, tris (2-acryloyloxy) isocyanurate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, di (trimethylolpropane) tetraacrylate, di ( Many having two or more polymerizable double bonds in one molecule such as pentaerythritol) pentaacrylate and di (pentaerythritol) hexaacrylate Capacity (meth) acrylate. Moreover, urethane acrylate, polyester acrylate, epoxy acrylate, etc. can be illustrated as polyfunctional acrylate. These may be used alone or in combination of two or more.

  When the polyfunctional acrylate is used, the amount used is preferably 1 part by mass to 200 parts by mass, and more preferably 1 part by mass to 50 parts by mass with respect to 100 parts by mass of the resin component.

  As the resin composition used for the production of the hard coat layer (B), in addition to the resin component, an initiator, an organic solvent, a curing agent, an extender pigment, a clay mineral, a wax, a surfactant, What contains various additives, such as a stabilizer, a flow control agent, dye, a leveling agent, a rheology control agent, a ultraviolet absorber, antioxidant, or a plasticizer, can be used.

  As the initiator, for example, one or more selected from the group consisting of acetophenones, benzyl ketals, benzophenones, and acylphosphine oxides can be preferably used. Examples of the acetophenones include 1-hydroxy-cyclohexyl-phenyl-ketone, 1- [4- (2-hydroxyethoxy) -phenyl] -2-hydroxy-2-methyl-1-propan-1-one, 2-hydroxy -1- {4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] phenyl} -2-methyl-propan-1-one, 2-methyl-1- (4-methylthiophenyl) -2 -Morpholinopropan-1-one, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropane-1- ON, 4- (2-hydroxyethoxy) phenyl- (2-hydroxy-2-propyl) ketone, oxyphenylacetic acid, 2- [2-oxo-2-phenylacetoxyethoxy] ethyl ester and oxyphenylacetic acid and 2- ( 2- Mixtures of mud ethoxy) ethyl ester. Examples of the benzyl ketals include 1-hydroxycyclohexyl-phenyl ketone and benzyl dimethyl ketal. Examples of the benzophenones include benzophenone and methyl o-benzoylbenzoate. Examples of the benzoins include benzoin, benzoin methyl ether, and benzoin isopropyl ether. Examples of the acylphosphine oxides include 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, and phenyl (2,4,6-trimethyl). And benzoyl) ethyl phosphinate. The said photoinitiator may be used independently and may use 2 or more types together.

  The amount of the photopolymerization initiator used is preferably 0.1 parts by mass to 15 parts by mass, and more preferably 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the resin component. .

  Moreover, as said resin composition, what contains a thermosetting resin can be used as needed.

  Examples of the thermosetting resin include vinyl resins, unsaturated polyester resins, polyurethane resins, epoxy resins, epoxy ester resins, acrylic resins, phenol resins, petroleum resins, ketone resins, silicone resins, and modified resins thereof. It is done.

  Examples of the organic solvent include aliphatic or alicyclic hydrocarbons such as n-hexane, n-heptane, n-octane, cyclohexane, and cyclopentane; aromatic hydrocarbons such as toluene, xylene, and ethylbenzene. Alcohols such as methanol, ethanol, n-butanol, ethylene glycol monomethyl ether, propylene glycol monomethyl ether; ethyl acetate, butyl acetate, n-butyl acetate, n-amyl acetate, ethylene glycol monomethyl ether acetate, propylene glycol Esters such as monomethyl ether acetate; Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, methyl n-amyl ketone, cyclohexanone; diethylene glycol dimethyl ether, diethylene glycol di Polyalkylene glycol dialkyl ethers such as tilether; ethers such as 1,2-dimethoxyethane, tetrahydrofuran and dioxane; N-methylpyrrolidone, dimethylformamide, dimethylacetamide or ethylene carbonate used alone or in combination of two or more Can be used.

  Examples of the curing agent include compounds having an isocyanate group.

  Examples of the compound having an isocyanate group include aromatic diisocyanates such as tolylene diisocyanate and diphenylmethane-4,4′-diisocyanate, meta-xylylene diisocyanate, α, α, α ′, α′-tetramethyl-meta- Aralkyl diisocyanates such as xylylene diisocyanate can be used.

  Examples of the compound having an isocyanate group include tetramethylene diisocyanate, 1,5-pentamethylene diisocyanate, 1,6-hexamethylene diisocyanate (hereinafter abbreviated as “HDI”), 2,2,4- (or 2, 4,4-trimethyl-1,6-hexamethylene diisocyanate, lysine isocyanate, isophorone diisocyanate, hydrogenated xylene diisocyanate, hydrogenated diphenylmethane diisocyanate, 1,4-diisocyanate cyclohexane, 1,3-bis (diisocyanate methyl) cyclohexane, It is preferable to use an aliphatic polyisocyanate such as 4,4′-dicyclohexylmethane diisocyanate.

  As the aliphatic polyisocyanate, allophanate type polyisocyanate, biuret type polyisocyanate, adduct type polyisocyanate and isocyanurate type polyisocyanate can be used.

  As the compound having an isocyanate group, a so-called blocked isocyanate compound in which an isocyanate group is blocked with a blocking agent can also be used.

  Examples of the blocking agent include alcohols such as methanol, ethanol, and lactic acid ester; phenolic hydroxyl group-containing compounds such as phenol and salicylic acid ester; amides such as ε-caprolactam and 2-pyrrolidone; acetone oxime, methyl ethyl ketoxime, and the like Oximes: Active methylene compounds such as methyl acetoacetate, ethyl acetoacetate, acetylacetone and the like can be used.

  In order to obtain an antiglare film excellent in abrasion resistance, the curing agent such as the compound having an isocyanate group is contained in the range of 5% by mass to 50% by mass with respect to the solid content of the resin composition. Is preferable.

  The resin composition can be produced by mixing the resin component, hydrophobic wet silica (b1), the particles (b2), and, if necessary, additives such as the initiator.

  Specifically, the hard coat layer (B) is coated with the resin composition on one or both sides of the substrate (A), dried, and irradiated with active energy rays as necessary. It can be formed by curing.

  The hard coat layer (B) is provided on one side or both sides of the base material (A) directly or via another layer, and may be provided directly on one side of the base material (A). preferable.

  As the hard coat layer (B), one having a thickness of 0.1 μm to 100 μm is preferable, and one having a thickness of 1 μm to 50 μm is high in hardness and excellent in scratch resistance. It is preferable for obtaining an antiglare film.

  In addition, the antiglare film of the present invention not only reduces the reflected light by scattering light but also reduces the reflection of the light itself, so that the reflection reducing layer (B) is provided on the surface of the hard coat layer (B). It is preferred to use those having C).

  As the reflection reducing layer (C), a layer constituted by a so-called low refractive index layer (c1) alone, a layer in which a high refractive index layer (c2) and a low refractive index layer (c1) are laminated, medium refractive index A layer in which a refractive index layer, a high refractive index layer (c2), and a low refractive index layer (c1) are laminated can be used.

  The low refractive index layer (c1) preferably has a refractive index in the range of 1.20 to 1.45, and more preferably has a refractive index of 1.23 to 1.42. preferable.

  The high refractive index layer (c2) preferably has a refractive index of 1.55 to 2.00, and more preferably has a refractive index of 1.60 to 1.80.

  It is preferable to use a medium refractive index layer having an intermediate refractive index between the refractive index of the low refractive index layer (c1) and the refractive index of the high refractive index layer (c2).

  The said reflection reduction layer (C) can be formed by apply | coating the composition for reflection reduction layer (C) formation, and drying.

  As the composition for forming the reflection reducing layer (C), for example, the composition for forming the low refractive index layer (c1), the composition for forming the high refractive index layer (c2), or the like can be used.

  As the composition for forming the low refractive index layer (c1), for example, a composition containing a filler and a binder can be used.

  As said filler, what contains the particle | grains which have the particle | grains which have a space | gap, a metal fluoride, etc., for example can be used.

  As the particles having voids, those having a porous structure containing gas inside can be used. Specifically, examples of the particles having voids include hollow silica particles and silica particles having a nanoporous structure.

  Further, as the particles made of the metal fluoride, particles made of magnesium fluoride, aluminum fluoride, calcium fluoride, lithium fluoride or the like can be used.

  Moreover, as said filler, what was modified with the organic compound etc. can also be used. Specifically, as the modified filler, one obtained by polymerizing a crosslinkable monomer or an oligomer thereof in the presence of the unmodified particles can be used. The said filler can be used combining 1 type (s) or 2 or more types. The filler may be crystalline, sol, or gel.

  As the filler, it is preferable to use hollow silica particles.

  The hollow silica particles may have a spherical shape, a chain shape, a needle shape, a plate shape, a scale shape, a rod shape, a fiber shape, or an indefinite shape. Among these, it is preferable to use spherical or acicular particles as the hollow silica particles.

  When the shape of the hollow silica particles is spherical, the average particle diameter is preferably 5 nm to 100 nm, more preferably 20 nm to 80 nm, and 40 nm to 70 nm is excellent in low refractive index and excellent It is more preferable because both transparency can be achieved.

  As the binder usable in the composition for forming the low refractive index layer (c1), for example, an active energy ray-curable compound such as a compound having a polymerizable unsaturated double bond can be used.

  Specific examples of the polymerizable unsaturated double bond include an acryloyl group, a methacryloyl group, a vinyl group, and an allyl group, and an acryloyl group and a methacryloyl group are preferable.

  Examples of the active energy ray-curable compound include ethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, and pentaerythritol tetra (meth). ) Acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, ethylene oxide modified (EO modified) trimethylolpropane tri (Meth) acrylate, propylene oxide modified (PO modified) trimethylolpropane tri (meth) acrylate, EO modified phosphate Poly (poly) acrylates such as (meth) acrylate, tris (acryloxyethyl) isocyanurate, caprolactone-modified tris (acryloxyethyl) isocyanurate, 1,3,5-cyclohexanetriol tri (meth) acrylate, acrylic ( Epoxy (meth) acrylates such as (meth) acrylate, di (meth) acrylate of bisphenol A diglycidyl ether, di (meth) acrylate of hexanediol diglycidyl ether, urethane (meth) acrylate, and some of them are polymerized The formed oligomer can be used.

  Among these, as the active energy ray-curable compound, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and urethane acrylate are used. It is preferable to use it for obtaining an optical film such as an antireflection film excellent in translucency and appearance quality.

  The active energy ray-curable compound is preferably included in the range of 5% by mass to 95% by mass with respect to the total solid content of the composition for forming the low refractive index layer (c1).

  Further, as the binder, a fluorine-based polymer, a silicon-based polymer, or the like can be used.

  As the fluorine-based polymer, for example, those obtained by polymerizing monomers such as vinylidene fluoride and hexafluoropropylene can be used.

  As the composition for forming the low refractive index layer (c1), a composition containing a known silicone antifouling agent, fluorine antifouling agent, slipping agent or the like is used as necessary in addition to the above-described components. can do.

  The thickness of the low refractive index layer (c1) is preferably in the range of 50 nm to 300 nm, more preferably in the range of 50 nm to 150 nm, and in the range of 80 nm to 120 nm, the appearance quality is excellent. It is preferable for obtaining an optical film such as an antireflection film excellent in antireflection properties.

  The high refractive index layer (c2) can be formed by using a composition for forming a high refractive index layer (c2).

  As the composition for forming the high refractive index layer (c2), a composition containing a compound having a polymerizable unsaturated double bond and, if necessary, high refractive index inorganic particles can be used.

  As the compound having a polymerizable unsaturated double bond, the same active energy ray-curable compounds as exemplified in the composition for forming the low refractive index layer (c1) can be used. .

  As the high refractive index inorganic particles, those having a refractive index of 1.55 to 2.00 are preferably used. For example, zinc oxide having a refractive index of 1.90, refractive index of 2.3 to 2. 7 titania, refractive index. 95 ceria, tin-doped indium oxide having a refractive index of 1.95 to 2.00, antimony-doped tin oxide having a refractive index of 1.75 to 1.85, yttria having a refractive index of 1.87, refractive index of 2. The zirconia etc. which is 10 can be used individually or in combination of 2 or more types.

  The thickness of the high refractive index layer (c2) is preferably in the range of 10 nm to 300 nm, and more preferably in the range of 30 nm to 200 nm.

  The thickness of the reflection reducing layer (C) including the low refractive index layer (c1) and the high refractive index layer (c2) is preferably in the range of 80 nm to 400 nm, and in the range of 80 nm to 300 nm. Is more preferable.

  Next, the manufacturing method of the anti-glare film of this invention is demonstrated.

  The anti-glare film of the present invention is, for example, coated with the resin composition for forming the hard coat layer (B) on at least one surface side of the substrate (A), dried, and then activated energy as necessary. It can be manufactured by irradiating and curing a line.

  When producing an antiglare film having a reflection reducing layer (C) on the surface of the hard coat layer (B), the surface of the hard coat layer (B) or the semi-cured hard coat layer (B ′) After coating and drying the composition for forming the reflection reducing layer (C), the reflection reducing layer (C) can be formed by irradiating and reacting with an active energy ray as necessary.

  Examples of the method for coating the hard coat layer (B) forming composition on one side or both sides of the substrate (A) include a die coater, a curtain flow coater, a roll coater, a reverse roll coater, a gravure coater, and a micro coater. Examples thereof include a method using a gravure coater, knife coater, bar coater, spin coater and the like.

  Examples of a method for polymerizing a part or all of the polymerizable unsaturated double bonds contained in the layer formed by coating by the above method include, for example, ultraviolet rays, electron beams, α rays, β rays, and γ rays. The method of irradiating such an active energy ray is mentioned.

  As an apparatus for irradiating the active energy ray, for example, in the case of ultraviolet rays, the generation source thereof is a low pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, an electrodeless lamp (fusion lamp), a chemical lamp, a black light. Lamps, mercury-xenon lamps, short arc lamps, helium / cadmium lasers, argon lasers, sunlight, LEDs and the like can be mentioned.

Irradiation intensity of the active energy ray ^is preferably ^{100mJ / cm 2 ~800mJ / cm 2} , more preferably ^{300mJ / cm 2 ~700mJ / cm 2} .

  When the composition containing the curing agent is used as the composition for forming the hard coat layer (B), by heating as necessary, before irradiation with active energy rays, simultaneously with irradiation, or after irradiation , The curing reaction can proceed. The heating may be performed, for example, at about 80 ° C. for about 20 minutes to 4 hours after irradiation with active energy rays.

  Examples of the method for applying the composition for forming the reflection reducing layer (C) include a die coater, a curtain flow coater, a roll coater, a reverse roll coater, a gravure coater, a micro gravure coater, a knife coater, a bar coater, and a spin coater. The method using a coater etc. is mentioned, The method using a die coater is preferable.

  As a method for further improving the adhesion between the hard coat layer (B) and the reflection reducing layer (C), the surface of the hard coat layer (B) is previously subjected to a sandblasting method, a solvent treatment method, or the like. Examples of the method include a method of making the surface uneven, corona discharge treatment, chromic acid treatment, flame treatment, hot air treatment, ozone treatment, ultraviolet irradiation treatment, and oxidation treatment.

  The method of irradiating the active energy rays when forming the reflection reducing layer (C) is the same as the line type and apparatus exemplified as being usable when forming the hard coat layer (B). Can be performed in a similar manner.

Irradiation intensity of the active energy ^rays, 100 mJ / cm 2 is preferably _{^{~800mJ / cm 2, 300mJ / cm}} 2 ~700mJ / cm 2 and it is the resin layer (A ') remaining in the polymerizable unsaturated This is more preferable in that most or all of the double bonds undergo radical polymerization.

  Moreover, when manufacturing the anti-glare film which has the structure by which the high refractive index layer (c2) and the low refractive index layer (c1) were laminated | stacked as said reflection reduction layer (C), said hard-coat layer (B) Alternatively, the composition for forming a high refractive index layer (c2) is applied to the surface of the hard-cured layer (B ′) in a semi-cured state, dried, and irradiated with active energy rays as necessary, and then the low refractive index layer. (C1) A high refractive index layer (c2) and a low refractive index layer (c1) are sequentially laminated on the surface of the hard coat layer (B) by applying and drying the forming composition and irradiating active energy rays. It is preferable to go through a step of forming the formed reflection reducing layer (C).

  Examples of the method for applying the composition for forming the low refractive index layer (c1) on the surface of the high refractive index layer (c2) include a die coater, a curtain flow coater, a roll coater, a reverse roll coater, a gravure coater, Examples thereof include a method using a micro gravure coater, a knife coater, a bar coater, a spin coater and the like.

  The visibility reflectance of the antiglare film produced by the production method is preferably 2.0% or less, more preferably 1.5% or less, and further preferably 1.0% or less. preferable.

  The optical film manufactured by the above manufacturing method has various functional layers such as a decorative layer, an adhesive, an electromagnetic wave shielding layer, an infrared absorption layer, an ultraviolet absorption layer, and a color correction layer on one or both sides as necessary. You may have.

  The functional layer may be a single layer or a plurality of layers. For example, the functional layer may be a single layer and have a plurality of performances. For example, a single layer having antifouling performance and infrared absorption performance may be used.

  As described above, the optical film may have a decorative layer or a pressure-sensitive adhesive layer on part or all of one side or both sides thereof. The antireflection film provided with a part or all of the decorative layer can be used as a decorative film. Moreover, the antireflection film provided with a part or all of the pressure-sensitive adhesive layer can be used as a protective film.

  Examples of the decorative layer include those composed of letters, figures, symbols, and frame-like borders for concealment.

  Hereinafter, the present invention will be described more specifically with reference to specific production examples and examples.

Synthesis Example 1: Production of acrylic polymer (x1) A reactor equipped with a stirrer, a cooling tube, a dropping funnel and a nitrogen introduction tube was charged with 453 parts by mass of methyl isobutyl ketone, and the system temperature was increased to 110 ° C while stirring. Then, 720 parts by weight of glycidyl methacrylate, 480 parts by weight of methyl methacrylate, and 48 parts by weight of t-butylperoxy-2-ethylhexanoate (“Perbutyl O” manufactured by Nippon Emulsifier Co., Ltd.) The mixture was dropped from the dropping funnel over 3 hours and then held at 110 ° C. for 15 hours.

  Next, after the temperature was lowered to 90 ° C., 1.6 parts by mass of methoquinone and 367 parts by mass of acrylic acid were charged.

  Next, after adding 7.8 parts by mass of triphenylphosphine, the temperature was raised to 100 ° C. and held for 8 hours, and 3000 parts by mass of methyl isobutyl ketone solution of acrylic polymer (X-1) (non-volatile content: 50.0). Mass%).

  Each property value of the acrylic polymer (x1) was as follows. Weight average molecular weight (Mw): 13,000, theoretical acryloyl group equivalent in terms of solid content: 321 g / eq, hydroxyl value 108 mgKOH / g

  In the present invention, the weight average molecular weight (Mw) is a value measured under the following conditions using a gel permeation chromatograph (GPC).

Measuring device: HLC-8220 manufactured by Tosoh Corporation
Column: Tosoh Corporation guard column HXL-H
+ Tosoh Corporation TSKgel G5000HXL
+ Tosoh Corporation TSKgel G4000HXL
+ Tosoh Corporation TSKgel G3000HXL
+ Tosoh Corporation TSKgel G2000HXL
Detector: RI (differential refractometer)
Data processing: Tosoh Corporation SC-8010
Measurement conditions: Column temperature 40 ° C
Solvent tetrahydrofuran
Flow rate: 1.0 ml / min Standard: Polystyrene sample: 0.4 mass% tetrahydrofuran solution filtered in terms of resin solids with a microfilter (100 μl)

Synthesis Example 2: Production of urethane acrylate (y1) 166 parts by mass of dicyclohexylmethane-4,4'-diisocyanate, 0.2 part by mass of dibutyltin dilaurate and 0.2 part by mass of methoquinone were added to a reactor equipped with a stirring device. The temperature was raised to 60 ° C. with stirring.

  Next, 630 parts by mass of pentaerythritol triacrylate (“Aronix M-305” manufactured by Toagosei Co., Ltd.) is divided into 10 portions, charged every 10 minutes, allowed to react for 10 hours, and has an isocyanate group of 22500 cm −1 in the infrared spectrum. After confirming that the absorption disappeared, the reaction was terminated to obtain urethane acrylate (y1). Each property value of the urethane acrylate (y1) was as follows. Weight average molecular weight (Mw): 1,400, theoretical acryloyl group equivalent: 120 g / eq

Example 1
40 parts by mass of a methyl isobutyl ketone solution of the acrylic polymer (x1) obtained in Synthesis Example 1 (20 parts by mass of the acrylic polymer (x1)), 30 parts by mass of “Aronix M-404” (manufactured by Toagosei Co., Ltd.) Hydrophobized wet silica particles (b1-1) (manufactured by Tosoh Silica Co., Ltd., polydimethylsiloxane-treated (hydrophobized) wet silica particles, SS-50F, average particle size 1.2 μm) 50 parts by mass , 80 parts by mass of methyl isobutyl ketone (hereinafter abbreviated as “MIBK”), and a slurry having a nonvolatile content of 50% by mass was mixed and dispersed using a wet ball mill (“Star Mill LMZ015” manufactured by Ashizawa Corporation), A dispersion was obtained. The conditions for dispersion by the wet ball mill are as follows.

Media: Zirconia beads having a median diameter of 100 μm Filling ratio of resin composition with respect to the inner volume of the mill: 70% by volume
Peripheral speed at the tip of the stirring blade: 11 m / sec
Flow rate of resin composition: 200 ml / min
Dispersion time: 60 minutes Average of the hydrophobized wet silica particles (b1-1) that were mixed with 0.5 parts by mass of the obtained dispersion and 100 parts by mass of methyl ethyl ketone and contained in the mixture. The particle diameter was measured using a particle diameter measuring device (“ELSZ-2” manufactured by Otsuka Electronics Co., Ltd.).

  In the dispersion obtained above, “ZN-171” which is a light diffusing agent as particles (b2) (manufactured by Gifu Serrac Manufacturing Co., Ltd., average particle size 5.3 μm) 12.5 parts by mass (particles (b2)) The content of the corresponding particles is 1.5 parts by weight, 2 parts by weight of photoinitiator (“Irgacure # 184” manufactured by Ciba Specialty Chemicals) is added, and methyl isobutyl ketone and polypropylene glycol monomethyl ether are further added to reduce the nonvolatile fraction. By preparing to 40 mass%, the active energy ray-curable resin composition for hard coat layer formation was obtained.

  For the average particle size, a mixture of particles (b2) and methyl ethyl ketone (the mass ratio of particles (b2) in the entire mixture is 1% by mass) is prepared, and a laser diffraction / scattering particle size distribution analyzer manufactured by Horiba, Ltd. The value (median diameter) converted based on the value measured by (LA-920) and the particle size of HORIBA standard standard particles (polystyrene latex) is indicated.

  The active energy ray-curable resin composition was applied on a polyethylene terephthalate film (thickness 125 μm) with a bar coater so that the film thickness after curing was a predetermined value, and dried at 70 ° C. for 1 minute. The antiglare film which has a hard-coat layer on the surface of the polyethylene terephthalate film was obtained by making it pass and harden | cure with the irradiation amount of 250 mJ / cm <2> using a high pressure mercury lamp under nitrogen.

  The active energy ray-curable resin composition is applied onto a triacetyl cellulose film (thickness 80 μm) with a bar coater so that the film thickness after curing becomes a predetermined value, and dried at 70 ° C. for 1 minute. The antiglare film having a hard coat layer on the surface of the triacetyl cellulose film was obtained by passing through a high pressure mercury lamp under nitrogen at a dose of 250 mJ / cm 2 and curing.

Transparency Test Method The haze value of the antiglare film was measured using a “haze computer HZ-2” manufactured by Suga Test Instruments Co., Ltd.

Evaluation method of appearance of antiglare film When the surface of the hard coat layer side of the antiglare film was visually observed, the unevenness of the light reflected on the surface and the light transmitted from the back side of the antiglare film could not be confirmed. Was evaluated as “◯”, and the unevenness of the light reflected from the surface of the anti-glare film and the light transmitted from the back side of the anti-glare film was evaluated as “△” when it was confirmed in a part of the anti-glare film. In addition, the light reflected from the surface of the anti-glare film and the unevenness of the light transmitted from the back side of the anti-glare film were evaluated as “x” when the entire anti-glare film was confirmed.

Method for evaluating warpage A test piece was prepared by cutting the antiglare film into a square of 10 cm in length and 10 cm in width. When the test piece was placed on a horizontal surface, the distance between the four corners of the test piece and the horizontal plane was measured, and the average value was calculated. The antiglare film having a small average value was evaluated as a film that hardly causes warpage.

Pencil Hardness Test Method According to JIS K 5400, the surface of the hard coat layer constituting the antiglare film was subjected to a pencil scratch test 5 times (5 times using a pencil of one kind of hardness) with a predetermined load. Of the five tests, the pencil hardness of the antiglare film was taken as the hardness one lower than the pencil hardness when the surface of the hard coat layer was damaged.

  In addition, the pencil hardness test of the anti-glare film using a polyethylene terephthalate film (PET) as a base material among the anti-glare films is performed under a load of 750 g, and the anti-glare film using a triacetyl cellulose film (TAC) as a base material. The pencil hardness test was performed at a load of 500 g.

Example 2
Hydrophobic wet method silica fine particles (b1-2) (manufactured by Tosoh Silica Co., Ltd., “SAZ-20B”, polydimethylsiloxane-treated wet method silica fine particles, average particle diameter instead of hydrophobic wet silica particles (b1-1) An active energy ray-curable resin composition for forming a hard coat layer and an antiglare film were produced using the same in the same manner as in Example 1 except that 2.5 μm) was used.

Example 3
The amount of hydrophobic wet silica particles (b1-1) used is changed from 50 parts by weight to 45 parts by weight, the amount of Aronix M-404 used is changed from 30 parts by weight to 25 parts by weight, and the urethane acrylate ( Except for using 30 parts by mass of y1), an active energy ray-curable resin composition for forming a hard coat layer and an antiglare film were produced using the same in the same manner as in Example 1.

Example 4
The amount of hydrophobic wet silica particles (b1-1) used is changed from 50 parts by weight to 60 parts by weight, the amount of Aronix M-404 used is changed from 30 parts by weight to 20 parts by weight, and the urethane acrylate ( Except for using 20 parts by mass of y1), an active energy ray-curable resin composition for forming a hard coat layer and an antiglare film were produced using the same in the same manner as in Example 1.

Example 5
Except that the amount of Aronix M-404 used was changed from 30 parts by weight to 50 parts by weight, the active energy ray-curable resin composition for forming the hard coat layer and the prevention using the same were carried out in the same manner as in Example 1. A dazzling film was prepared.

Comparative Example 1
40 parts by mass of MIBK solution of acrylic polymer (x1) obtained in Synthesis Example 1 (20.0 parts by mass of acrylic polymer (x1)), 30 parts by mass of Aronix M-404, hydrophobic fumed silica particles (b '1-1) A wet ball mill (manufactured by Ashizawa Co., Ltd.) prepared by mixing 50 parts by mass of EVONIK (Aerosil R7200, average particle size: 1.5 μm) and 80 parts by mass of MIBK to give a slurry having a nonvolatile content of 50% by mass. “Star mill LMZ015”) was mixed and dispersed to obtain a dispersion.

  In the dispersion obtained above, “ZN-171” which is a light diffusing agent as particles (b2) (manufactured by Gifu Serrac Manufacturing Co., Ltd., average particle size 5.3 μm) 12.5 parts by mass (particles (b2)) The content of the corresponding particles is 1.5 parts by weight, 2 parts by weight of photoinitiator (“Irgacure # 184” manufactured by Ciba Specialty Chemicals) is added, and methyl isobutyl ketone and polypropylene glycol monomethyl ether are further added to reduce the nonvolatile fraction. By preparing to 40 mass%, the active energy ray-curable resin composition for hard coat layer formation was obtained.

  Each condition of dispersion by the wet ball mill is as follows.

Media: Zirconia beads having a median diameter of 100 μm Filling ratio of resin composition with respect to the inner volume of the mill: 70% by volume
Peripheral speed at the tip of the stirring blade: 11 m / sec
Flow rate of resin composition: 200 ml / min
Dispersion time: 40 minutes

Comparative Example 2
Other than changing the usage amount of the hydrophobic fumed silica particles (b′1-1) from 50 parts by mass to 55 parts by mass and changing the usage amount of the acrylic polymer (x1) from 20 parts by mass to 15 parts by mass. Prepared an active energy ray-curable resin composition for forming a hard coat layer and an antiglare film using the same in the same manner as in Comparative Example 1.

Comparative Example 3
Instead of the hydrophobic fumed silica particles (b′1-1), 50 parts by mass of the hydrophobic fumed silica particles (b′1-2) (manufactured by EVONIK, AEROSIL R8200, average particle size 1.5 μm) is used. The amount of acrylic polymer (x1) used was changed from 20 parts by weight to 10 parts by weight, and the amount of Aronix M-404 used was changed from 30 parts by weight to 40 parts by weight. The active energy ray-curable resin composition for forming a hard coat layer and an antiglare film were produced using the same.

Comparative Example 4
40 parts by mass of MIBK solution of acrylic polymer (x1) obtained in Synthesis Example 1 (20.0 parts by mass of acrylic polymer (x1)), 30 parts by mass of Aronix M-404, silica fine particles (b′1-3 ) 50 parts by mass (manufactured by Tosoh Silica Co., Ltd., untreated precipitation method silica particles, E-220A), 5 parts by mass of organopolysiloxane, 80 parts by mass of MIBK, and a slurry having a nonvolatile content of 50% by mass, A dispersion was obtained by mixing and dispersing using a wet ball mill (“Star Mill LMZ015” manufactured by Ashizawa Corporation).

  In the dispersion obtained above, “ZN-171” which is a light diffusing agent as particles (b2) (manufactured by Gifu Serrac Manufacturing Co., Ltd., average particle size 5.3 μm) 12.5 parts by mass (particles (b2)) The content of the corresponding particles is 1.5 parts by weight, 2 parts by weight of photoinitiator (“Irgacure # 184” manufactured by Ciba Specialty Chemicals) is added, and methyl isobutyl ketone and polypropylene glycol monomethyl ether are further added to reduce the nonvolatile fraction. By preparing to 40 mass%, the active energy ray-curable resin composition for hard coat layer formation was obtained.

  Each condition of dispersion by the wet ball mill is as follows.

Media: Zirconia beads having a median diameter of 100 μm Filling ratio of resin composition with respect to the inner volume of the mill: 70% by volume
Peripheral speed at the tip of the stirring blade: 11 m / sec
Flow rate of resin composition: 200 ml / min
Dispersion time: 90 minutes

Claims (10)

An antiglare film having a hard coat layer (B) on at least one surface side of the substrate (A), wherein the hard coat layer (B) has a hydrophobic wet silica (b1) having an average particle size of 0.2 μm or less. ) And particles (b2) having an average particle diameter of more than 0.2 μm. The anti-glare film according to claim 1, wherein the hydrophobic wet silica (b1) has a structure derived from polydimethylsiloxane on the surface of the wet silica. The antiglare film according to claim 1 or 2, wherein the particles (b2) are organic particles, inorganic particles, or particles having an organic substance on the surface of the inorganic particles. The antiglare film according to any one of claims 1 to 3, wherein the particles (b2) have a polycarbonate structure on the surface of silica particles. The average particle size of the hydrophobic wet silica (b1) is in the range of 0.001 µm to 0.2 µm, and the average particle size of the particles (b2) is in the range of more than 0.2 µm and 10 µm or less. The anti-glare film of any one of -4. The antiglare film according to any one of claims 1 to 5, which has a reflection reducing layer (C) on the surface of the hard coat layer (B). The anti-glare film according to claim 6, wherein the reflection reducing layer (C) is a low refractive index layer (c1) or a laminate of a high refractive index layer (c2) and a low refractive index layer (c1). The low refractive index layer (c1) has a refractive index of 1.2 to 1.45, and the high refractive index layer (c2) has a refractive index layer of 1.55 to 2. 8. The antiglare film according to 7. An information display device, wherein the antiglare film according to any one of claims 1 to 8 is provided on a surface of an information display unit. An in-vehicle information display device, wherein the antiglare film according to any one of claims 1 to 8 is provided on a surface of an information display unit.