TWI453474B - Antiglare hard coat film and polarizer plate using the film - Google Patents

Description

Anti-glare hard coating film and polarizing plate using the same

The present invention relates to an antiglare hard coating film and a polarizing plate using the same. More specifically, the present invention relates to an anti-glare hard coating film provided with a hard coating layer containing organic fine particles, and does not reduce the contrast when the external surface haze value and the 60° gloss ratio are controlled to a desired value. It is an anti-glare hard coating film excellent in surface hardness, and a polarizing plate using the anti-glare hard coating film.

In a display such as a brown tube (CRT) or a liquid crystal display (LCD), a plasma display (PDP), etc., light is incident from the outside into the picture, and the light reflection makes the display picture not easy to see, especially in recent years accompanied by a display. The enlargement of the above problems has become an increasingly important issue. A means for solving this problem is exemplified by using a member having an antiglare hard coating layer. The method for forming the antiglare hard coating layer can be roughly classified into: (1) a method of forming a hard coating layer by using a physical method to harden the surface during hardening, and (2) forming a hard coating layer. (3) A method in which a filler is mixed in a hard coating material, (3) a method in which a non-coherent two component is mixed into a hard coating agent for forming a hard coating layer, and a method such as phase separation is used. By forming fine irregularities on any surface, it is possible to suppress the regular reflection of external light and prevent reflection of external light such as a fluorescent lamp. Among these, (2) a method of mixing a filler into a hard coating agent coating agent has become mainstream. In terms of fillers, inorganic particles represented by cerium oxide are generally used. The reason why the cerium oxide particles are used is not only that the whiteness of the obtained hard coating film can be suppressed to be low, but also that the abrasion resistance (antiabrasion) is not lowered due to insufficient curing.

On the other hand, there is proposed an anti-glare film which forms an anti-glare layer composed of a resin bead having a refractive index of 1.40 to 1.60 and an ionizing radiation-curable composition on a transparent substrate. For example, Patent Document 1 proposes that an anti-glare film made of an organic filler having a film thickness equal to or larger than a film thickness forms an unevenness that can exhibit anti-glare properties. However, if the anti-glare property is improved, the unevenness is increased. This will cause the fog value to rise and the transmission cleanliness value to decrease. In order to improve the above-mentioned problems, Patent Document 2 proposes to reduce the amount of the organic filler having a particle diameter of a coating film or the like for forming an anti-glare property, and to add an organic filler having a particle diameter of a coating film or less. Thereby, an anti-glare film which can achieve a balance can be produced.

However, in actuality, even if the balance of optical properties is obtained by the above method, the unevenness of the particle diameter is used, and it appears in a place where the unevenness does not exist, and comprehensive anti-glare property cannot be obtained. Further, since the variation in the haze value of the outer surface due to the film thickness is large, the stable productivity is deteriorated. Moreover, the film thickness of such systems depends on the size of the particles, and it is difficult to adjust the physical properties of the properties such as the film thickness of the surface hardness.

In addition, other methods have been tried to suppress the precipitation of the filler, and to design a method in which the average particle diameter of the filler is larger than the film thickness to exhibit the anti-glare property. For example, in Patent Document 1, it is proposed to control the precipitation of a filler by adding an inorganic filler such as cerium oxide for preventing precipitation, and Patent Document 3 proposes to add a small amount of a thixotropic agent formed of an expanded layered clay mineral such as mica. The same is done to prevent precipitation of the filler. However, when these inorganic substances are added, there is a problem that the transparency of the hard coating film is deteriorated.

It has also been proposed to use a relatively low specific gravity organic filler such as polystyrene in controlling the precipitation of the filler. The light-weight organic filler generally has a large refractive index difference from the cured product of the active energy ray-curable composition, and when used to produce an anti-glare film, it will function as a light diffusing function. An anti-glare film with a large internal fog value. Since the anti-glare film having a large internal fog value has light diffusing property, it has an effect of reducing the glare (so-called flicker) of a screen which is regarded as a problem by using a high-definition TV or a monitor in recent years (see Patent Document 4). 5 and 6).

However, the anti-glare film having a large internal haze value is low in contrast, so that the phenomenon of reducing flicker and the improvement of contrast are a trade-off relationship. Therefore, in the design of the display, it is therefore necessary to select an anti-glare film which is a high contrast type which is preferred for comparison, or an anti-glare film which is a wide-purpose type which is preferred to prevent flicker. However, neither the high-contrast type nor the widely-used type can obtain an anti-glare film that completely ignores another property, so that it has become a necessary subject to achieve a balanced design.

Further, the properties of the anti-glare property itself are affected by the unevenness of the surface of the anti-glare film, and as such general values, the outer surface haze value, the 60° gloss ratio, and the like can be exemplified. When the antiglare property of the antiglare film is adjusted, the content of the filler, the average particle diameter, or the film thickness is usually changed. However, when the surface shape is changed by the operations, not only the outer surface haze value or the 60° gloss is obtained. The rate, even the internal fog value, has changed accordingly, so there is a problem that the target cannot be compared.

Further, when the outer surface haze value is increased, a phenomenon in which the periphery of the external light reflecting portion is whitened and the visibility is deteriorated is also called a faded color.

[Patent Document 1] Japanese Patent Publication No. 6-18706

[Patent Document 2] Patent No. 3077344

[Patent Document 3] JP-A-2004-294601

[Patent Document 4] Patent No. 3507719

[Patent Document 5] Patent No. 3515401

[Patent Document 6] Patent No. 4001320

The object of the present invention is to provide an anti-glare hard coating film provided with a hard coating layer containing organic fine particles, and to control the outer surface haze value and the 60° gloss ratio to a desired value. The anti-glare hard coating film does not reduce the contrast, and a polarizing plate using the anti-glare hard coating film.

In order to achieve the object, the present inventors have first discovered through the use of an active energy ray-inductive composition containing: cerium oxide-containing fine particles; spherical organic fine particles; and at least one molecule The hard-coated dispersant forms a hard coating layer to form a hard coating layer, and the thickness is larger than the average particle diameter of the spherical organic fine particles, and the object thereof is attained, and the present invention has been completed based on the insight.

That is, the present invention provides [1] an anti-glare hard coating film characterized in that the surface of the transparent plastic film has a hard coating layer formed of a material for forming a hard coating layer, wherein the hard coating layer forming material contains (A) an active energy ray-sensitive composition comprising (a) a polyfunctional (meth) acrylate monomer and/or a (meth) acrylate prepolymer and (b) cerium oxide microparticles (B) spherical organic fine particles; and (C) a dispersing agent having at least one polar group in the molecule, and the thickness of the hard coating layer is larger than the average particle diameter of the above (B) spherical organic fine particles; [2] The anti-glare hard coating film according to the item [1], wherein (C) a dispersing agent having at least one polar group in the molecule, the polar group having a functional group selected from the group consisting of acidic groups and one to three amine groups [3] The anti-glare hard coating film according to [2], wherein the dispersing agent having at least one polar group in the (C) molecule has an N,N-dialkylamine group; [4] The anti-glare hard coating film according to any one of the items [1] to [3] wherein the (b) cerium oxide-based fine particles have a (meth)acryl-containing group as a surface functional group. Silicon dioxide particles; [5] of [1] to [4] as described in any one antiglare hard coating film, wherein (B) the average particle diameter of spherical organic fine particles is 6 ~ 10 μ m; [6] The antiglare hard coating film according to any one of [1] to [5] wherein (A) the cured product of the active energy ray-inductive composition, and (B) the spherical organic fine particles [7] The anti-glare hard coating film according to any one of [1] to [6] wherein the outer surface of the hard coating layer has a haze value of 20% or less; and [8] A polarizing plate which is formed by bonding a surface opposite to a surface on which an anti-glare hard coating film according to any one of the items [1] to [7] is bonded to a polarizing mirror.

According to the present invention, there is provided an antiglare hard coating film provided with a hard coating layer containing organic fine particles, which does not reduce the contrast when the outer surface haze value and the 60° gloss ratio are controlled to a desired value. A glare hard coating film and a polarizing plate using the antiglare hard coating film.

The best form of implementing the invention

In the antiglare hard coating film of the present invention, a hard coating layer forming material having the following composition is used in forming a hard coating layer provided on at least one surface of the transparent plastic film.

[hard coating layer forming material]

In the present invention, the hard coating layer forming material contains (A) an active energy ray-inductive composition, (B) spherical organic fine particles, and (C) a dispersing agent having at least one polar group in the molecule.

((A) Active energy ray-sensitive composition)

In the active energy ray-inducing composition used as the component (A), the hard-coating layer forming material contains (a) an active energy ray-curable compound-based polyfunctional (meth)acrylic acid as an essential component. An ester monomer and/or a (meth)acrylate prepolymer, and (b) a ceria-based fine particle.

Further, in the present invention, the active energy ray means an energy quantum having an electromagnetic wave or a charged particle ray, that is, an ultraviolet ray or an electron beam.

<(a) Active energy ray-hardening compound>

In the present invention, a (a) active energy ray-curable compound is a polyfunctional (meth) acrylate monomer and/or a (meth) acrylate prepolymer.

The polyfunctional (meth)acrylate monomer may, for example, be 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate or the like. Methyl) neopentyl glycol acrylate, polyethylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, dicyclopentanyl (meth)acrylate, Caprolactone modified dicyclopentenyl di(meth) acrylate, ethylene oxide modified di(meth) acrylate, allylated cyclohexyl di (meth) acrylate, heterotrimerization Di(meth)acrylate cyanate, trimethylolpropyl tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, propionic acid modified dineopentaerythritol tris(methyl) Acrylate, neopentyl alcohol tri(meth) acrylate, propylene oxide modified trimethylolpropane tri(meth) acrylate, tris(propylene decyloxyethyl) isocyanate, C Multi-functionality such as acid-modified dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa(meth) acrylate, caprolactone-modified dipentaerythritol hexa(meth) acrylate (meth) acrylate. These monomers may be used alone or in combination of two or more.

On the other hand, the (meth)acrylate prepolymer may, for example, be a polyester acrylate type, an epoxy acrylate type, a urethane acrylate type, or a polyalcohol acrylate type. Here, as the polyester acrylate-based prepolymer, (meth)acrylic acid esterification can be exemplified by a hydroxyl group of a polyester oligomer having a hydroxyl group at both terminals obtained by condensing a polyvalent carboxylic acid and a polyvalent alcohol. Alternatively, it can be obtained by (meth)acrylation by a hydroxyl group at the terminal of the oligomer obtained by adding an alkylene oxide to a polyvalent carboxylic acid.

An epoxy acrylate-based prepolymer, for example, by reacting (meth)acrylic acid on an oxirane ring of a relatively low molecular weight bisphenol type epoxy resin or a novolak type epoxy resin Obtained. The urethane acrylate-based prepolymer may be exemplified by a (meth) acrylate by a polyurethane oligomer obtained by reacting a polyether polyol or a polyester polyol with a polyisocyanate. obtain. Further, the polyhydric acrylate prepolymer can be obtained by esterifying a hydroxyl group of a polyether polyol with (meth) acrylate. These prepolymers may be used singly or in combination of two or more kinds, or may be used together with the polyfunctional (meth) acrylate monomer.

<(b) cerium oxide-based fine particles>

In the present invention, as the (b) cerium oxide-based fine particles, colloidal cerium oxide fine particles and/or cerium oxide fine particles having a surface functional group may be used.

The colloidal cerium oxide microparticles have an average particle diameter of about 1 to 400 nm, and further have cerium oxide microparticles having a surface functional group, and the surface functional group may be cerium oxide microparticles having a (meth) acrylonitrile group ( Hereinafter referred to as reactive cerium oxide microparticles).

The reactive cerium oxide fine particles may, for example, be a stanol group on the surface of the cerium oxide fine particles having an average particle diameter of about 0.005 to 1 μm, and a polymerizable unsaturated group-containing organic compound having a functional group reactive with the stanol group. The compound is reacted and is thus obtained. The polymerizable unsaturated group may, for example, be a radically polymerizable (meth) acrylonitrile group.

The polymerizable unsaturated group-containing organic compound having a functional group reactive with the stanol group may, for example, be a compound represented by the general formula (I).

(wherein R ¹ represents a hydrogen atom or a methyl group, and R ² represents a halogen atom or

The base shown).

As such a compound, for example, acrylic acid, chloro acrylate, 2-isocyanatoethyl acrylate, glycidyl acrylate, 2,3-iminopropyl acrylate, 2-hydroxyethyl acrylate, propylene oxy propylene can be used. A trimethoxy decane or the like, and a methacrylic acid derivative corresponding to the acrylic acid derivatives. These acrylic acid derivatives or methacrylic acid derivatives may be used singly or in combination of two or more.

The cerium oxide fine particles obtained by combining the organic compound containing a polymerizable unsaturated group and the active energy ray-hardening component are crosslinked and hardened by irradiation with an active energy ray.

The reactive cerium oxide fine particles have an effect of improving the abrasion resistance of the obtained hard coating film.

In the active energy ray-inductive composition (A), a compound obtained by combining an organic compound having a polymerizable unsaturated group in cerium oxide microparticles is commercially available, for example, as manufactured by JSR Corporation. Opstar Z7530", "opstar Z7524", "opstar TU4086", etc.

In the present invention, the content of the cerium oxide-based fine particles of the component (b) is usually from about 5 to 90% by mass in the solid content of the active energy ray-sensitive composition of the component (A). It is preferably from 10 to 70% by mass.

Further, in the cerium oxide-based fine particles of the component (b), the average particle diameter of the cerium oxide particles can be measured by a laser diffraction ‧ scattering method. This method measures the average particle diameter by irradiating the liquid in which the particles are dispersed with the laser light by the intensity change of the light scattered by the scatter.

((B) spherical organic particles)

In the hard coating layer forming material of the present invention, the spherical organic fine particles used in the component (B) may, for example, be polyfluorene-based fine particles, melamine-based resin fine particles, acrylic resin fine particles, or acrylic-styrene-based copolymer fine particles. Polycarbonate fine particles, polyethylene fine particles, polystyrene fine particles, benzoguanamine resin fine particles, and the like. These are spherical and have a narrow particle size distribution. The spherical organic fine particles preferably have an average particle diameter of 6 to 10 μm from the viewpoint of antiglare performance. The average particle diameter is a measured value of a coulter counter method. Further, the particle size distribution is preferably a weight fraction of an average particle diameter within a range of ±2 μm as measured by a Coulter Counter method of 70% or more.

In the present invention, the spherical organic fine particles of the component (B) may be used alone or in combination of two or more. Further, in terms of antiglare properties, the active energy ray is induced with respect to the component (A). The solid content of the composition is 100 parts by mass, and the amount thereof is preferably 0.1 to 30 parts by mass, more preferably 1 to 20 parts by mass.

In the present invention, the cured product of the active energy ray-inductive composition of the component (A) and the spherical fine particles of the component (B) can be selected for various refractive index differences depending on the purpose. For example, when the antiglare film is used as the high contrast type, the absolute value of the refractive index difference is preferably small, and more preferably 0 to 0.03, and particularly preferably 0 to 0.02, in order not to exhibit internal haze. Moreover, when the anti-glare film is used as a wide-purpose type, in order to exhibit the controllable internal haze, it is preferably 0.03 to 0.2, more preferably 0.04 to 0.1. Further, the refractive index of the cured product of the active energy ray-inductive composition is measured by JIS K 7142, which is irradiated with an active energy ray and hardened. Further, the refractive index of the spherical fine particles is a value calculated from the refractive index of the contained monomer and the mass ratio according to the monomer composition.

((C) dispersant)

In the hard coating layer forming material of the present invention, the dispersing agent used in the component (C) is a substance having at least one polar group in the molecule, and the polar group may, for example, be a carboxyl group, a hydroxyl group, a sulfo group or a first-order amine group. A 2-stage amine group, a 3-stage amine group, a guanamine group, a 4-stage ammonio base, a pyridinio base, a sulphonio base, a phosphonio base, and the like. Among these, a carboxyl group, a sulfo group, and a 1-3 amino group are preferred. The polar groups may be introduced into one molecule or may be introduced into a plurality of polar groups.

When a plurality of polar groups are contained in the molecule, the essential component is a component in which the organic compounds each having a polar group are bonded to each other, and examples of the component include a polyoxyalkylene glycol. The molecular weight of such a component is not particularly limited, and may be selected from a wide range of from about several hundred to several hundreds of thousands.

In the hard coating layer having at least one polar group in the molecule, in the hard coating layer having a larger film thickness than the average particle diameter of the spherical organic fine particles, precipitation of the spherical organic fine particles can be suppressed, and the fine particles are mostly present in the hard In the vicinity of the surface of the coating layer, it has an effect of improving the anti-glare property.

The mechanism is not very clear, but I think the following considerations are made.

It is believed that the polar group in the dispersant is coordinated to the surface of the spherical organic fine particles, resulting in a change in the polarity of the surface of the organic fine particles, so that the probability of the organic fine particles present in the vicinity of the surface becomes high, and as a result, the average particle diameter of the organic fine particles is above In the film thickness, organic fine particles are also present in the vicinity of the surface of the hard coating layer, so that the anti-glare property is improved.

Further, specific examples of the polar group in the dispersant include a polar group derived from an N,N-dialkylamino group having 1 to 8 carbon atoms of the alkyl group. In view of the fact that the polar group is an effective compound, it is easy to obtain a viewpoint, and it is particularly preferable to use an N,N-dialkylaminoalkanol having 2 to 6 carbon atoms.

Specific examples of the N,N-dialkylaminoalkanol include N,N-dimethylamine ethanol, N,N-diethylamine ethanol, N,N-dipropylamine ethanol, and N. N-dibutylamine ethanol, N,N-dipentylamine ethanol, N,N-dihexylamine ethanol, and the like, and a compound in which the ethanol portion of the compound is substituted with propanol or butanol. Further, the two alkyl groups of the dialkyl moiety may be the same or different.

The dispersant having a polar group derived from an N,N-dialkylaminoalkanol may, for example, be an N,N-dialkylaminoalkanol-modified polyoxyalkylene glycol.

In the present invention, the dispersing agent of the component (C) may be used alone or in combination of two or more. In addition, the blending amount is a solid content of the active energy ray-inductive composition which is the component (A) from the viewpoint of the balance of the anti-glare property, the abrasion resistance, the other physical properties, and the economy of the hard coating layer. It is 0.01 to 10 parts by mass, more preferably 0.05 to 5 parts by mass, per 100 parts by mass.

(photopolymerization initiator)

In the hard coating layer forming material of the present invention, a photopolymerization initiator may be contained as desired. The photopolymerization initiator may, for example, be benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether or acetophenone. , dimethylaminoethyl benzene, 2,2-dimethoxy-2-phenyl acetophenone, 2,2-diethoxy-2-phenyl acetophenone, 2-hydroxy-2- Methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-propane-1 -ketone, 4-(2-hydroxyethoxy)phenyl-2(hydroxy-2-propanone), benzophenone, p-phenylbenzophenone, 4,4'-diethylaminobenzophenone , Dichlorobenzophenone, 2-methylhydrazine, 2-ethylhydrazine, 2-tributylphosphonium, 2-aminopurine, 2-methyl 9-oxosulfur 2-ethyl 9-oxosulfur 2-chloro 9-oxosulfur 2,4-dimethyl 9-oxosulfur 2,4-diethyl 9-oxosulfur , benzyl dimethyl ketal, acetophenone ketal, p-dimethylamino benzoate and the like.

These may be used singly or in combination of two or more kinds, and the amount thereof is usually in the range of 0.2 to 10 parts by mass based on 100 parts by mass of the total active energy ray-curable compound. Here, the fully active energy ray-curable compound means that the compound is contained when (b) cerium oxide-based fine particles are used in the case of using reactive cerium oxide fine particles.

(Modulation of hard coating layer forming material)

The hard coating layer forming material used in the present invention may be added to the active energy ray-sensitive composition of the component (A) and the spherical organic fine particles of the component (B) at a ratio set in a suitable solvent, if necessary. a dispersing agent of the component (C), and optionally, a photopolymerization initiator or various additional components such as an antioxidant, an ultraviolet absorber, a decane coupling agent, a light stabilizer, a leveling agent, an antifoaming agent, etc., by It is dissolved or dispersed to prepare.

The solvent to be used in this case may, for example, be an aliphatic hydrocarbon such as hexane or heptane, an aromatic hydrocarbon such as toluene or xylene, a halogenated hydrocarbon such as dichloromethane or chlorinated ethylene, or methanol, ethanol or propanol. And alcohols such as butanol, acetone, methyl ethyl ketone, 2-pentanone, isophorone, cyclohexanone, etc., esters such as ethyl acetate and butyl acetate, and ethyl cellosolve. The fiber is a solvent or the like.

The concentration of the hard coating layer forming material thus prepared is not particularly limited as long as it can be applied in terms of viscosity, and can be appropriately selected depending on the conditions.

[Transparent plastic film]

In the antiglare hard coating film of the present invention, a hard coating layer is formed on at least one surface of the transparent plastic film by using a hard coating layer forming material prepared as described above.

The transparent plastic film is not particularly limited, and can be suitably selected from conventionally known plastic films which are optical hard coating film substrates. The plastic film may, for example, be a polyester film such as polyethylene terephthalate (hereinafter referred to as "PET"), polybutylene terephthalate or polyethylene naphthalate, or a poly Vinyl film, polypropylene film, cellophane, diethylcellulose film, triethylene glycol film (hereinafter referred to as "TAC film"), acetonitrile cellulose butyrate film, polyvinyl chloride film, poly Vinylene chloride film, polyvinyl alcohol film, ethylene-vinyl acetate film, polystyrene film, polycarbonate film, polymethylpentene film, polyfluorene film, polyetheretherketone film, polyether oxime A plastic film such as a film, a polyether fluorene-based film, a polyimide film, a fluororesin film, a polyamide film, an acrylic film, a decene-based resin film, or a cycloolefin resin film. Further, when the antiglare hard coating film of the present invention is used as a protective film for a polarizing plate, it is excellent in optical isotropic properties, so that a TAC film is particularly preferable.

These plastic films may be transparent or translucent, and may be colored or uncolored, and may be appropriately selected depending on the application. For example, when used for protection of a liquid crystal display, a colorless transparent film is suitable.

The thickness of the plastic film is not particularly limited and may be appropriately selected depending on the situation, but is usually in the range of 15 to 300 μm, preferably 30 to 200 μm. Further, in order to improve the adhesion between the plastic film and the layer provided on the surface thereof, the plastic film may be subjected to a surface treatment by an oxidation method or a roughening method depending on whether it is on one side or both sides. Examples of the oxidation method include corona discharge treatment, plasma treatment, chromic acid treatment (wet type), flame treatment, hot air treatment, ozone ‧ ultraviolet irradiation treatment, and the like, and the embossing method may, for example, blasting ( Sand blast) method, solvent treatment method, and the like. These surface treatment methods can be appropriately selected depending on the type of the plastic film, but in general, from the viewpoints of effects and workability, it is preferred to use a charge discharge treatment method. Further, an undercoat layer may also be provided.

[Formation of hard coating]

On the one surface of the transparent plastic film, a conventionally known method such as a bar coating method, a knife coating method, a transfer coating method, a blade coating method, a die coating method, a gravure coating method, or the like is used. The hard coating layer forming material is applied to form a coating film, and after drying, the active energy ray is irradiated to cure the coating film to form a hard coating layer.

The active energy ray may, for example, be an ultraviolet ray or an electron beam. The irradiation amount of the ultraviolet light obtained by a high pressure mercury lamp, an electrodeless lamp, a metal halide lamp, a xenon lamp or the like is usually 100 to 500 mJ/cm ² . On the one hand, the electron beam can be obtained by an electron beam accelerator or the like, and the irradiation amount is usually 150 to 350 kV. . Among these active energy rays, ultraviolet rays are particularly preferred. Further, when an electron beam is used, a cured film can be obtained without adding a photopolymerization initiator.

The thickness of the hard coating layer thus formed must be larger than the average particle diameter of the spherical organic fine particles used in the present invention. Therefore, the lower limit is about 7 μm, and the upper limit is prevented from hardening and shrinking due to the hard coating layer. The viewpoint of causing the hard coating film to curl is about 20 μm. A preferred thickness is in the range of 8 to 15 μm.

[Anti-glare hard coating] (optical properties)

The optical characteristics of the antiglare hard coating film of the present invention thus formed are different depending on the type thereof.

In the case of high contrast, the internal haze value is usually 0 to 10%. Even if the internal fog value is flicker in this range, high contrast can be achieved, so it can be used in full accordance with the type of display (design idea). If the internal fog value exceeds 10%, high contrast (becoming a wide-ranging type) cannot be obtained. Moreover, in the case of a wide use type, the internal haze value is usually 5 to 40%. When the internal haze value is less than 5%, the performance of suppressing flicker is not sufficient, and if it exceeds 40%, the visibility is lowered. The preferred internal haze value of the widely used antiglare hard coating film is usually 10 to 30%, more preferably 15 to 25%.

Further, the outer surface haze value is preferably 20% or less from the viewpoint of the visibility of the high contrast type and the wide use type, and is preferably 5% or more from the viewpoint of antiglare property.

Further, the internal haze value indicates a haze value caused only by light scattering inside the film, and the outer surface haze value refers to a haze value caused only by light scattering due to unevenness of the surface of the film, and the total haze value indicates the internal haze value and the external haze value The sum of the surface haze values. In the antiglare hard coating film of the present invention, the total haze value corresponds to the haze value defined in JIS K 7136. The calculation method of the internal haze value and the outer surface haze value of the hard coating layer is as follows.

<Method for calculating the internal haze value of the hard coating layer and the haze value of the outer surface>

First, the haze value of the antiglare hard coating film of the present invention is measured in accordance with JIS K 7136 (in the present invention, it is referred to as "total haze value" in order to distinguish it from other haze values).

Next, a transparent adhesive sheet having a thickness of 20 μm was placed on the side of the hard coating layer of the antiglare hard coating film to prepare a sample for internal haze value calculation. The haze value of the adhesive sheet and the haze value of the internal haze value calculation sample were measured in the same manner as described above. Thereafter, the internal haze value of the hard coating layer of the antiglare hard coating film was calculated by subtracting the haze value of the adhesive sheet from the haze value of the internal haze value calculation sample. Further, the transparent plastic film used in the antiglare hard coating film of the present invention usually has a haze value of less than 0.01%, so that its influence can be ignored. When the haze value of the transparent plastic film is 0.01% or more, the value obtained from the internal haze value and the haze value of the transparent plastic film is calculated as the internal haze value of the hard coating layer.

Finally, the internal haze value was subtracted from the total haze value to calculate the outer surface haze value of the hard coating layer of the antiglare hard coating film.

Further, the 60° gloss ratio is preferably 20 to 80, regardless of whether it is a high contrast type or a widely used type. When the 60° gloss ratio exceeds 80, the surface gloss ratio becomes large (reflection of light is large), and the antiglare property is adversely affected. If the 60° gloss rate is less than 20, fading is likely to occur. Further, the total light transmittance of the antiglare hard coating film is preferably 88% or more, more preferably 90% or more. The total light transmittance is less than 88%, and there is a problem that the transparency is insufficient.

Further, the 60° gloss ratio is a measured value of JIS K 7105, which is a measured value of JIS K 7136.

(effect)

The antiglare hard coating film of the present invention can produce the following effects.

(1) There is no detailed explanation about the effect of the dispersant, but we believe that it may be that the polar group of the dispersant is located on the surface of the organic fine particles, resulting in a change in the polarity of the surface of the organic fine particles, so that the organic fine particles are present on the surface of the hard coated layer. The probability of getting nearby is high. Therefore, in the film thickness larger than the average particle diameter of the organic fine particles, the organic fine particles are also present in the vicinity of the surface of the hard coating layer, so that the anti-glare property is improved and the unevenness of the coating is reduced.

(2) Since the inevitable film thickness is increased, it is expected that the pencil hardness is improved as compared with the conventional anti-glare hard coating film produced by using the same size of organic fine particles.

(3) The more the amount of the dispersant added, the higher the probability that the organic fine particles are present in the vicinity of the surface of the hard coating layer, so that the surface state (the outer surface haze value, the 60° gloss ratio) is adjusted by the amount of the dispersant added. may.

(other functional layers)

In the anti-glare hard coating film of the present invention, an antireflection layer capable of imparting antireflection properties, such as a siloxane-based coating film or a fluorine-based coating film, may be provided on the uppermost layer as needed. In this case, the thickness of the antireflection layer is preferably about 0.05 to 1 μm. By providing the antireflection layer, it is possible to cancel the reflection of the reflection by reflection by sunlight, a fluorescent lamp, or the like, and to suppress the reflectance of the surface, thereby improving the total light transmittance and improving the transparency. Further, antistatic properties can be improved in response to the type of the antireflection layer.

(adhesive layer)

In the antiglare hard coating film of the present invention, an adhesive layer for adhering to an adherend such as a liquid crystal display can be formed on the opposite surface of the hard coating layer of the plastic film. As the adhesive constituting the adhesive layer, for example, an acrylic adhesive, an urethane-based adhesive, or a polyoxygen-based adhesive suitable for optical use is preferably used. The thickness of the adhesive layer is usually in the range of 5 to 100 μm, preferably 10 to 60 μm.

Further, on the adhesive layer, a release sheet can be provided as needed. In the peeling sheet, a release agent such as a polyoxyethylene resin or the like may be applied to various plastic films such as polyethylene terephthalate or polypropylene. The thickness of the release sheet is not particularly limited, but is usually about 20 to 150 μm.

The anti-glare hard coating film which forms such an adhesive layer is suitable for use in a display such as a CRT, an LCD, or a PDP, and can provide an anti-glare property or an abrasion-resistant property, and is particularly suitable for use in an LCD or the like. The polarizing plate is adhered.

[Polarizer]

Moreover, the present invention also provides a polarizing plate in which the antiglare hard and hard coating film of the present invention is bonded to a polarizing mirror.

The liquid crystal cell in the LCD generally has two transparent electrode substrates on which the alignment layer is formed, and the alignment layer is disposed on the inner side, and the spacer is arranged in a predetermined gap, and the periphery thereof is sealed, and the liquid crystal material is sandwiched in the gap. At the same time, the outer surface of the two transparent electrode substrates is provided with a structure in which a polarizing plate is disposed via an adhesive layer.

Fig. 1 is a perspective view showing an example of the configuration of the polarizing plate. As shown in the figure, the polarizing plate 10 is generally provided with a substrate having a three-layer structure of a triethylenesulfonyl cellulose (TAC) film 2 and 2' bonded to both surfaces of a polyvinyl alcohol-based polarizing lens 1. An adhesive layer 3 for adhering to an optical component such as a liquid crystal cell is formed on one surface thereof, and a release sheet 4 is attached to the adhesive layer 3. Further, a surface protective film 5 is usually provided on the opposite surface of the adhesive layer 3 of the polarizing plate.

The polarizing plate of the present invention is provided in the TAC film 2, 2' provided on both surfaces of the polarizing mirror 1, and the hard coating layer of the present invention described above is provided on one side of the TAC film. When the adhesive layer 3, the release sheet 4, and the surface protective film 5 are provided on the polarizing plate, the hard coating layer according to the present invention is provided particularly on the side of the TAC film 2' on the side of the surface protective film 5.

The method of manufacturing the polarizing plate of the present invention can be carried out by, for example, the operation shown below. In addition, Fig. 2 is a schematic cross-sectional view showing a configuration of an example of a polarizing plate of the present invention.

First, the transparent plastic film of the substrate is a film 12' having no optical anisotropy such as a TAC film, and the hard coating layer 13 of the present invention is formed on one surface thereof to form an antiglare hard coating film 14. Next, using the adhesive layers 15, 15', the TAC film 12 on which the hard coating layer 13 is not formed is laminated on one surface of the polarizing mirror 11, and the anti-glare hard coating film 14 is laminated on the opposite surface of the polarizing mirror. When a TAC film is used for a transparent plastic film, saponification treatment other than the surface treatment may be performed in order to improve the adhesion of the laminate due to the adhesive.

Thereby, the polarizing plate 20 excellent in anti-glare performance and abrasion resistance can be obtained. The polarizing plate 20 may be provided with a peelable surface protection film 5 as shown in FIG. 1 on the surface on which the hard coating layer 13 is provided, or may be provided on the opposite surface thereof for attaching optical components such as a liquid crystal cell. Adhesive layer 16, or release sheet 17.

The polarizing plate of the present invention can be used for a liquid crystal cell starting from an LCD, or for use in a light amount adjustment, a polarized interference application device, or an optical defect tester.

Example

Next, the present invention will be described in detail by way of examples, but the invention is not limited to the examples.

Further, the average particle diameter and refractive index of the organic fine particles, the refractive index of the cured product of the active energy ray-inductive composition, and the properties of the hard coating film were determined by the following methods.

<Organic Particles> (1) Average particle size

A Kurt particle counter [manufactured by Beckman Coulter Co., Ltd., trade name "Multisizer 3") was used as a dispersion of 0.5% ion-exchanged water, and the mixture was measured at 25 ° C by a Coulter Counter method.

(2) Refractive index

The average refractive index is calculated from the refractive index of the contained monomer and the mass ratio according to the composition of the organic fine particle monomer.

<Active energy ray-sensitive composition> (3) Refractive index of the cured product

In each of the preparation examples, a coating agent composed of the active energy ray-inductive composition (A), a photoinitiator, and a diluent solvent was prepared. These were coated on a TAC film [manufactured by Fujifilm Co., Ltd., trade name "TAC80TD80ULH") in the same manner as in the examples to obtain a hard coating film for measuring the refractive index of the cured product. The refractive index of the hard coating layer was determined by using an Afold refractometer manufactured by Atago Co., Ltd., and JIS K 7142, as the refractive index of the cured product of the active energy ray-inductive composition.

<hard coating> (4) Full light transmittance and total fog value

The total light transmittance and the total haze value were measured using a haze ‧ transmittance meter "HM-150" manufactured by Murakami Color Research Institute Co., Ltd., and JIS K 7136.

(5) Internal fog value and outer surface fog value

To 100 parts by mass of an acrylic adhesive (manufactured by Japan Carbide Co., Ltd., trade name "PE-121"), an isocyanate crosslinking agent (manufactured by Toyo Ink Co., Ltd., trade name "BHS-8515"), 2 parts by mass, and toluene 100 were added. For the parts by mass, make an adhesive solution. The adhesive solution was applied to a film of polyethylene terephthalate (manufactured by Toyobo Co., Ltd., trade name "A4300") having a thickness of 50 μm to a thickness of 20 μm after drying, and dried at 100 ° C for 3 minutes to prepare an adhesive sheet. . The prepared adhesive sheet was adhered to the side of the hard coating layer of the anti-glare hard coating film as a sample for calculating the internal haze value. The haze value of the adhesive sheet and the internal haze value calculation sample was measured, and the value of the haze value of the adhesive sheet was subtracted from the haze value of the internal haze value calculation sample as the internal mist of the hard coating layer of the antiglare hard coating film. value. In addition, in order to confirm that the haze value of the monomer of the triacetyl cellulose film which is a transparent plastic film of the anti-glare hard coating film used in the Example and the comparative example is less than 0.01%, it can be Ignored value. The haze value was measured as in the above (4).

(6) Evaluation of anti-glare

A sample obtained by attaching a hard coating film to an acrylic resin blackboard [manufactured by Sumitomo Chemical Co., Ltd.) via an acrylic adhesive was visually observed under a fluorescent lamp, and the anti-glare property was evaluated by the following criteria.

○: Fluorescent lamp has sufficient anti-reflection and less fading

×: The anti-reflection property of the fluorescent lamp is insufficient, or the anti-reflection property of the fluorescent lamp is sufficient, but the fading is large and the visibility is poor.

(7) 60° gloss rate

The portable type gloss meter "PG-1M" made by Nippon Denshoku Industries Co., Ltd. was used for measurement according to JIS K 7105.

(8) Pencil hardness

The JIS K 5400 was used for the measurement using the pencil scratch coating film hardness tester "No553-M1" of Yasuda Seiki Co., Ltd.

(9) uneven coating film

The surface of the hard coating layer was visually observed to evaluate coating film unevenness according to the following criteria.

○: The overall surface of the film surface looks average

×: The portion with high anti-glare on the surface of the coating film is mixed with the low portion, and the overall appearance is uneven.

Modulation example 1

A hard coating agent of (A) active energy ray-inductive composition [manufactured by JSR Corporation, "opstar Z7524", a solid concentration of 70% by mass, and full active energy containing reactive cerium oxide particles and polyfunctional acrylate 65% by mass of the linear curable compound, 5% by mass of the photoinitiator, 30% by mass of methyl ethyl ketone, and 1.50 parts by mass of the cured product; (B) PMMA fine particles of spherical organic particles [manufactured by Amika Chemical Co., Ltd. , an average particle diameter of 5 μm, a refractive index of 1.49] 11.25 parts by mass; (C) a dispersion of a dispersant having a tertiary amine as a polar group [manufactured by BYK Chemie Co., Ltd., trade name "disperbyk 103", solid content concentration of 40% by mass 3 parts by mass; 90 parts by mass of propylene glycol monomethyl ether of a diluent solvent were uniformly mixed to prepare a coating agent 1 for an antiglare hard coating layer having a solid content of about 40% by mass. The compounding amount of the coating agent is shown in Table 1.

Modulation example 2

In addition to (B) spherical organic fine particles, 11.25 parts by mass of acrylic microparticles (average particle diameter: 8 μm, refractive index: 1.55), and (C) dispersant, 0.5 parts by mass of "disperbyk 103" (described above) were used. In the same manner as in Preparation Example 1, a coating agent 2 for an antiglare hard coating layer having a solid content of about 40% by mass was produced. The compounding amount of the coating agent is shown in Table 1.

Modulation example 3

In the same manner as in Preparation Example 2, a coating agent 3 for an antiglare hard coating layer having a solid content of about 40% by mass was produced in the same manner as in Preparation Example 2 except that the dispersing agent (disperbyk 103) (the above) was used in an amount of 0.75 parts by mass. The compounding amount of the coating agent is shown in Table 1.

Modulation example 4

In the same manner as in Preparation Example 2, the coating agent 4 for an antiglare hard coating layer having a solid content of about 40% by mass was produced in the same manner as in the preparation example 2 except that the dispersing agent (1) was used. The compounding amount of the coating agent is shown in Table 1.

Modulation example 5

In the same manner as in Preparation Example 2, a coating agent 5 for an antiglare hard coating layer having a solid content of about 40% by mass was produced in the same manner as in Preparation Example 2, except that the dispersing agent was used in an amount of 1.5 parts by mass. The compounding amount of the coating agent is shown in Table 1.

Modulation example 6

A solid form was produced in the same manner as in Preparation Example 2, except that the (C) dispersant was used in the form of caprolactone-modified polyethylene glycol (manufactured by BYK Chemie Co., Ltd., trade name "disperbyk 111", solid content concentration: 90% by mass], 1 part by mass. The coating agent 6 for an antiglare hard coating layer having a composition of about 40% by mass. The compounding amount of the coating agent is shown in Table 1.

Modulation example 7

A solid form was produced in the same manner as in Preparation Example 2 except that the (C) dispersant was used in the form of caprolactone-modified polyethylene glycol (manufactured by BYK Chemie Co., Ltd., trade name "disperbyk 163", solid content concentration: 45 mass%], 1 part by mass. The coating agent 7 for an antiglare hard coating layer having a composition of about 40% by mass. The compounding amount of the coating agent is shown in Table 1.

Modulation example 8

In addition to the (C) dispersant, polyethylene glycol modified with caprolactone and dibutylamine ethanolammonium salt at both ends (manufactured by BYK Chemie Co., Ltd., trade name "disperbyk 180", solid component concentration 81% by mass] 1 mass In the same manner as in Preparation Example 2, a coating agent 8 for an antiglare hard coating layer having a solid content of about 40% by mass was produced. The compounding amount of the coating agent is shown in Table 1.

Modulation example 9

A coating agent 9 for an antiglare hard coating layer having a solid content of about 40% by mass was produced in the same manner as in Preparation Example 1 except that the (C) dispersant was not used. The compounding amount of the coating agent is shown in Table 1.

Modulation example 10

In addition to the (A) component, a hard coating agent containing no cerium oxide microparticles [made by Daisei Seiki Co., Ltd., trade name "Seika beam EXF-L203 (CS-1), solid content concentration of 70% by mass, containing a reactive sheet) Modification of 65 wt% of active energy ray-curable compound of body and polyfunctional acrylate, 5% by mass of photoinitiator, 30% by mass of propylene glycol monomethyl acetate, and refractive index of cured product of 1.52"100 parts by mass, and other preparations In the same manner as in Example 1, a coating agent 10 for an antiglare hard coating layer having a solid content of about 40% by mass was produced. The compounding amount of the coating agent is shown in Table 1.

Modulation example 11

The coating agent 11 for an antiglare hard coating layer having a solid content of about 40% by mass was produced in the same manner as in Preparation Example 2 except that the (C) dispersant was not used. The compounding amount of the coating agent is shown in Table 1.

Modulation example 12

The coating agent 12 for an antiglare hard coating layer having a solid content of about 40% by mass was produced in the same manner as in Preparation Example 1 except that the (B) spherical organic fine particles were not used. The compounding amount of the coating agent is shown in Table 1.

Example 1

The coating agent obtained in Preparation Example 1 was coated on a surface of a TAC film (trade name "TAC80TD80ULH", manufactured by Fujifilm Co., Ltd.) having a thickness of 80 μm, which was used for a transparent plastic film, by a mayer bar coater. 1 The cured film thickness was set to about 10 μm. After drying in an oven at 70 ° C for 1 minute, ultraviolet rays of 300 mJ/cm ² were irradiated with a high pressure mercury lamp to form a hard coating layer, and an antiglare hard coating film was produced.

The properties of the hard coating are shown in Table 2.

Example 2

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 2 prepared in Preparation Example 2 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Example 3

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 3 obtained in Preparation Example 3 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Example 4

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 4 prepared in Preparation Example 4 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Example 5

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 5 obtained in Preparation Example 5 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Example 6

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 6 obtained in Preparation Example 6 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Example 7

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 7 obtained in Preparation Example 7 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Example 8

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 8 obtained in Preparation Example 8 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Comparative example 1

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 9 obtained in Preparation Example 9 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Comparative example 2

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 9 obtained in Preparation Example 9 was applied by a Meyer bar coater to have a cured film thickness of about 5 μm.

The properties of the hard coating are shown in Table 2.

Comparative example 3

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 9 obtained in Preparation Example 9 was applied by a Meyer bar coater to have a cured film thickness of about 4.5 μm.

The properties of the hard coating are shown in Table 2.

Comparative example 4

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 10 obtained in Preparation Example 10 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Comparative Example 5

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 11 obtained in Preparation Example 11 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

Comparative Example 6

The anti-glare hard coating film was produced in the same manner as in Example 1 except that the coating agent 12 obtained in Preparation Example 12 was applied by a Meyer bar coater to have a cured film thickness of about 10 μm.

The properties of the hard coating are shown in Table 2.

The above Tables 1 and 2 show the following.

Example 1 (high-contrast type) shows that when a dispersing agent is added to PMMA fine particles, even if the organic fine particles having an average particle diameter of 5 μm are hard coating layers having a large film thickness, the outer surface haze value can be exhibited and anti-glare property can be obtained. . On the other hand, in Comparative Example 1, since no dispersing agent was added, surface unevenness was hardly formed, and the outer surface haze value was small, and the anti-glare property could not be obtained. In the second comparative example 2 in which the film thickness of the hard coating layer is approximately equal to the average particle diameter of the organic fine particles, a portion where the unevenness does not exist is formed in order to form the surface unevenness, and a surface having unevenness in antiglare property is obtained. Further, when the film thickness was made thin (Comparative Example 3), the outer surface haze value became extremely large, and it became a state called fading.

In Comparative Example 5, even if no dispersant was added, some outer surface haze was obtained depending on the kind of the organic fine particles, but a sufficient outer surface haze value could not be obtained. On the other hand, in Examples 2 to 5 (wide-use type), the outer surface haze value was changed depending on the amount of the dispersant added, but the internal haze value did not change. Further, in Examples 6 to 8 (wide-use type), even if the type of the dispersant was changed, the haze value of the outer surface was improved as compared with the comparative example 5.

In Comparative Example 4, since the cerium oxide-based fine particles were not contained, a sufficient outer surface haze value could not be obtained. On the other hand, Comparative Example 6 is an example in which no organic fine particles were added and a dispersing agent was added, and almost no outer surface haze was observed, and antiglare property could not be obtained.

As a result, the anti-glare hard coating film of the present invention makes it possible to control the degree of anti-glare property without affecting the contrast.

Industrial availability

The antiglare hard coating film of the present invention is an antiglare hard coating film provided with a hard coating layer containing organic fine particles, and when the outer surface haze value and the 60° gloss ratio are controlled to a desired value, It will reduce the contrast and is suitable for use in components such as CRT, LCD, PDP, etc., which can provide anti-glare performance or wear resistance, and is particularly suitable for polarizing plates such as LCDs.

1. . . Polyvinyl alcohol polarizer

2,2',12,12'. . . TAC film

3,16. . . Adhesive layer

4,17. . . Stripping sheet

5. . . Surface protection film

10. . . Polarizer

11. . . Polarizer

13. . . Hard coating

14. . . Anti-glare hard coating

15,15'. . . Subsequent layer

20. . . Polarizer

Fig. 1 is a perspective view showing a configuration of an example of a polarizing plate.

Fig. 2 is a schematic cross-sectional view showing the configuration of an example of a polarizing plate of the present invention.

11. . . Polarizer

12,12'. . . TAC film

13. . . Hard coating

14. . . Anti-glare hard coating

15,15'. . . Subsequent layer

16. . . Adhesive layer

17. . . Stripping sheet

20. . . Polarizer

Claims (8)

An anti-glare hard coating film characterized in that a surface of a transparent plastic film has a hard coating layer formed by using a hard coating layer forming material, wherein the hard coating layer forming material contains: (A) comprising (a) a polyfunctional layer And (b) reactive energy ray-sensitive composition of reactive (2) acrylate-based pre-polymer and (b) reactive cerium oxide-based fine particles; (B) spherical organic fine particles And (C) a dispersing agent having at least one polar group in the molecule, and the thickness of the hard coating layer is larger than the average particle diameter of the (B) spherical organic fine particles. An anti-glare hard coating film according to claim 1, wherein (C) a dispersing agent having at least one polar group in the molecule, the polar group having a functional group selected from the group consisting of acidic groups and one to three amine groups More than one. An anti-glare hard coating film according to claim 2, wherein the dispersing agent having at least one polar group in the (C) molecule has an N,N-dialkylamine group. The anti-glare hard coating film according to any one of claims 1 to 3, wherein (b) the reactive ceria-based microparticles have a (meth)acryl-containing group as a surface functional group. The cerium oxide particles. The anti-glare hard coating film according to any one of claims 1 to 3, wherein (B) the spherical organic fine particles have an average particle diameter of 6 to 10 μm. The anti-glare hard coating film according to any one of claims 1 to 3, wherein (A) the cured product of the active energy ray-sensitive composition and the refractive index difference of the (B) spherical organic fine particles are 0.03 or more. The antiglare hard coating film according to any one of claims 1 to 3, which has an outer surface haze value of 20% or less. A polarizing plate which is formed by bonding a surface opposite to a surface on which an anti-glare hard coating film according to any one of claims 1 to 7 is bonded to a polarizing mirror.