JP5531426B2 - Anti-glare film - Google Patents

Description

  The present invention relates to an antiglare film provided on the surface of a window or a display. In particular, the present invention relates to an antiglare film provided on the surface of a display such as a liquid crystal display (LCD), a CRT display, an organic electroluminescence display (ELD), a plasma display (PDP), a surface electric field display (SED), or a field emission display (FED). .

  In displays such as liquid crystal displays, CRT displays, EL displays, and plasma displays, an anti-glare film having a concavo-convex structure on the surface is displayed in order to prevent deterioration in visibility due to external light being reflected on the display surface during viewing. It is known to provide on the surface.

As the antiglare film, for example, the following techniques are known.
・ Technology to form an uneven structure on the surface of the anti-glare film by embossing method ・ Apply a coating liquid in which particles are mixed in the binder matrix forming material, and disperse the particles in the binder matrix. Technology for forming a concavo-convex structure In an antiglare film having a concavo-convex structure formed in this way on the surface, the image of external light becomes unclear due to scattering of external light incident on the antiglare film by the concavo-convex structure on the surface, It becomes possible to prevent a decrease in visibility due to the transfer of external light to the display surface.

  Here, the anti-glare film in which unevenness is formed on the surface by embossing can completely control the unevenness on the surface. Therefore, reproducibility is good. However, if there is a defect or foreign matter adhesion on the embossing roll, there is a problem that a defect is generated at the roll pitch.

  On the other hand, the antiglare film using the binder matrix and particles has fewer steps than the antiglare film using the embossing. Therefore, it can be manufactured at low cost. Therefore, various modes of antiglare films in which particles are dispersed in a binder matrix are known (Patent Document 1).

Various techniques are disclosed for an antiglare film using a binder matrix and particles. For example, the following techniques are disclosed.
・ A technology that uses a binder matrix resin, spherical particles, and amorphous particles in combination (Patent Document 2)
-Technology using binder matrix resin and a plurality of particles having different particle diameters (Patent Document 3)
・ Technology that has surface irregularities and defines the cross-sectional area of the recesses (Patent Document 4)

The following techniques are also disclosed.
-A technique that uses both internal scattering and surface scattering to make the anti-glare layer have an internal haze (cloudiness) of 1 to 15% and a surface haze (cloudiness) of 7 to 30% (Patent Document 5).
-Technology using a binder resin and particles having a particle size of 0.5 to 5 μm, and a difference in refractive index between the resin and particles of 0.02 to 0.2 (Patent Document 6)
・ Technology that uses binder resin and particles with a particle size of 1 to 5 μm, the difference in refractive index between the resin and particles is 0.05 to 0.15, and the technology in which the solvent to be used, the surface roughness, etc. are in a predetermined range ( Patent Document 7)
-Technology that uses a binder resin and a plurality of particles, and makes the refractive index difference between the resin and particles 0.03 to 0.2 (Patent Document 8)
・ In addition, for the purpose of reducing contrast reduction and hue change when the viewing angle is changed, surface haze (cloudiness) is 3 or more, haze value in normal direction and haze value in ± 60 ° direction Technology for making the difference 4 or less (Patent Document 9)

Thus, the anti-glare film of various structures is disclosed for various purposes.
The performance of the antiglare film used on the front surface of the display varies. In other words, the optimum antiglare film varies depending on the resolution of the display and the purpose of use. Therefore, various anti-glare films are required according to the purpose.

JP-A-6-18706 JP 2003-260748 A JP 2004-004777 A JP 2003-004903 A Japanese Patent Laid-Open No. 11-305010 JP 11-326608 A JP 2000-338310 A JP 2000-180611 A JP-A-11-160505

  The antiglare film prevents external light from being reflected by scattering light incident from the outside in the antiglare layer. Here, when the external light is strongly scattered by the anti-glare layer in order to prevent the reflection of external light, the anti-glare film is whitened by the scattered light, and therefore, the anti-glare film on the display surface. When this is provided, there arises a problem that the contrast is lowered. Therefore, in the present invention, it is an object to obtain an antiglare film that not only prevents sufficient reflection of external light but also does not become white and can provide a good contrast when provided on the display surface. And

In order to solve the above-mentioned problems, the invention according to claim 1 is an antiglare film having an antiglare layer comprising a binder matrix and particles on one surface of a transparent substrate, wherein the antiglare layer is on the antiglare layer side. The 60 ° gloss on the film surface is in the range of 110% to 130%, and
The anti-glare haze value of the film is in the range of less than 12% 10.3%, and the explosion-average film thickness of the antiglare layer is Ri der range of 3μm or 8.3μm or less, said particles acrylic -Styrene copolymer particles, wherein the average film thickness of the antiglare layer is not less than a value obtained by multiplying the average particle diameter of the particles contained in the antiglare layer by 1.3, and the average particle diameter of the particles is 3.5. The refractive index difference between the refractive index of the binder matrix and the refractive index of the particles is 0.04 or less, and the binder matrix forming material for forming the binder matrix has a hydroxyl group. It was set as the anti-glare film characterized by including the acrylic material which has .

As the invention according to claim 2, and the anti-glare film according to claim 1, wherein the particles have a particle element made of a copolymer of styrene and methyl methacrylate.

Moreover, as invention which concerns on Claim 3 , it is equipped with the anti-glare film of Claim 1 or 2 in order from the observer side, a polarizing plate, a liquid crystal cell, a polarizing plate, and a backlight unit in this order, and an anti-glare layer is provided. A transmissive liquid crystal display characterized by being on the surface on the viewer side was obtained.

Moreover, as invention which concerns on Claim 4 , as for the glare-proof film in any one of Claims 1 thru | or 3 , and a polarizing layer on the surface on the opposite side to the glare-proof layer formation surface of the transparent base material of the said anti-glare film, A polarizing plate characterized by comprising a transparent substrate.

Moreover, as invention which concerns on Claim 5 , from the observer side, in order, the polarizing plate of Claim 4 ,
A transmissive liquid crystal display including a liquid crystal cell, a polarizing plate, and a backlight unit in this order and having an antiglare layer on the surface on the viewer side was obtained.

  When the antiglare film having the structure of the present invention is used, not only can the reflection of sufficient external light be prevented, but the antiglare film is not whitened, and the antiglare film is provided on the display surface. It is possible to obtain an antiglare film that can provide a good contrast.

FIG. 1 is a schematic cross-sectional view of an antiglare film of the present invention. FIG. 2 is an explanatory view for explaining the characteristics of the antiglare film of the present invention. FIG. 3 is a schematic cross-sectional view of an antiglare film according to another embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of a transmissive liquid crystal display using the antiglare film of the present invention. FIG. 5 is a schematic view of the die coater coating apparatus of the present invention.

  The cross-sectional schematic diagram of the anti-glare film of this invention was shown in FIG. The antiglare film 1 of the present invention has an antiglare layer 12 on a transparent substrate 11. The antiglare layer 12 of the antiglare film 1 of the present invention includes a binder matrix 120 and particles 121.

  In the antiglare film of the present invention, the 60 ° gloss on the antiglare film surface on the antiglare layer side is in the range of 110% to 130%, and the haze value of the antiglare film is 2%. It is within the range of 12% or less.

  In the present invention, an anti-glare film not only can sufficiently prevent external light from being reflected, but also has an anti-glare film that has a good contrast when provided on the display surface. It is a problem to obtain. The inventors adjust the blending ratio and refractive index of the particles 121 and the binder matrix 120, and also produce the antiglare film by adjusting the average particle diameter r of the particles 121 and the average film thickness H of the antiglare layer. As a result of evaluation, by setting the 60 ° glossiness and haze degree on the antiglare film surface on the antiglare layer side within a predetermined range, it has sufficient antiglare property and does not become white. It has been found that an antiglare film having a good contrast can be obtained when it is provided on the display surface, and has led to the present invention.

  The antiglare film of the present invention is characterized in that the 60 ° glossiness on the surface provided with the antiglare layer is in the range of 110% to 130%. FIG. 2 is an explanatory diagram for explaining the characteristics of the antiglare film of the present invention. FIG. 2A is an explanatory view of an antiglare film having a low glossiness of 60 °, and FIG. 2B is an explanatory view of the antiglare film of the present invention.

  In the antiglare film having a low 60 ° glossiness shown in FIG. 2A, the light L1 from the light source 83 incident on the antiglare layer side of the antiglare film from the 60 ° direction is caused by the unevenness of the antiglare layer. Reflected and scattered, reflected light L2 and scattered light L3 are generated. At this time, in the anti-glare film 1 having a low 60 ° glossiness, the ratio of the scattered light L3 is large, and it is visually recognized as white for the observer 84 who observes from the front direction. On the other hand, in the antiglare film of the present invention, since the glossiness is as high as 110% or more and 130% or less, most of the light L1 from the light source 83 incident from the 60 ° direction is reflected. Light L2 is generated, and scattered light L3 is not generated much. Therefore, in the anti-glare film 1 of this invention, it is hard to be visually recognized for the observer 84 as white.

  The antiglare film of the present invention is characterized in that the 60 ° glossiness on the surface provided with the antiglare layer is in the range of 110% to 130%. When the 60 ° glossiness is less than 110%, the antiglare film is whitened, and a good contrast cannot be obtained when the antiglare film is provided on the display surface. On the other hand, if the 60 ° glossiness exceeds 130%, it will not be possible to obtain sufficient protection against external light reflection.

  In the antiglare film of the present invention, the surface on the side of the antiglare layer exhibits a high 60 ° gloss of 110% or more and 130% or less, but the antiglare film has sufficient anti-reflection of external light. Needs to have haze in the antiglare film. The antiglare film of the present invention is characterized in that the haze of the antiglare film is in the range of 2% to 12%. When the haze of the antiglare film exceeds 12%, the antiglare film is whitened, and when the antiglare film is provided on the display surface, a good contrast cannot be obtained. On the other hand, if the haze is less than 2%, the reflection of external light cannot be sufficiently prevented.

  In the antiglare film of the present invention, the 60 ° glossiness of the antiglare film on the side where the antiglare layer is formed is measured according to JIS K7105 (1981), and is obtained as a 60 ° specular glossiness. On the other hand, in the antiglare film of the present invention, the haze of the antiglare film is measured according to JIS K7105 (1981), and is determined as haze (cloudiness value).

  In the antiglare film of the present invention, the average film thickness H of the antiglare layer is not less than the value obtained by multiplying the average particle diameter r of the particles contained in the antiglare layer by 1.3 (r × 1.3). The average particle diameter of the particles is preferably within a range of 3.5 or less (r × 3.5). When the average film thickness H of the antiglare layer exceeds the value (r × 3.5) obtained by multiplying the average particle diameter r of the particles by 3.5 (r × 3.5), the antiglare film has a predetermined 60 ° glossiness and a predetermined haze. In order to satisfy the above, it is necessary to contain a large amount of particles in the antiglare layer. At this time, it becomes difficult to disperse the coating liquid in the antiglare layer forming coating liquid for forming the antiglare layer. There is a case. On the other hand, when the average film thickness H of the antiglare layer is smaller than the value (r × 1.3) obtained by multiplying the average particle diameter r of the particles contained in the antiglare layer by 1.3 (r × 1.3), the antiglare film is predetermined. In order to satisfy the 60 ° glossiness and the predetermined haze, it is necessary to extremely reduce the amount of particles contained in the antiglare layer. At this time, the antiglare layer forming coating solution for forming the antiglare layer The stability of the may decrease.

  In the case where the antiglare layer of the antiglare film uses a plurality of types of particles, the particles contained in the largest proportion may be used as a reference. That is, the average film thickness H of the antiglare layer is not less than the value obtained by multiplying the average particle diameter r of particles contained in the antiglare layer in the largest proportion by 1.3 (r × 1.3). It is preferable that the average particle diameter r of the particles contained in the largest ratio is less than 3.5 (r × 3.5).

  In the present invention, the average film thickness H of the antiglare layer is an average value of the film thickness of the antiglare layer having surface irregularities. The average film thickness H can be obtained by an electronic micrometer or a fully automatic fine shape measuring machine. The average particle diameter r of the particles can be measured by a light scattering type particle size distribution measuring method.

Further, in the anti-glare film of the present invention, the refractive index difference between the refractive index _{n M} a refractive index _{n M} and particles of a binder matrix that is 0.04 or less _(| | n M _-n A) preferable. Refractive index difference between the refractive index n _M a refractive index n _M and particles of the binder matrix (| n M _-n A _|) If exceeding 0.04, internal scattering of light incident inside the antiglare layer It becomes large and the antiglare film may become whitish. Incidentally, in the anti-glare film of the present invention, the refractive index difference between the refractive index n _M a refractive index n _M and particles of the binder matrix (| n M _-n A _|) may be 0.

  In the antiglare film of the present invention, the binder matrix refers to a component excluding particles among the components contained in the antiglare layer. The antiglare film of the present invention is formed by using a coating liquid for forming an antiglare layer, but the binder matrix forming material of the present invention is obtained by removing particles from the solid content of the coating liquid for forming an antiglare layer. Point to. The refractive index of the binder matrix and the particles is determined by a liquid immersion method (Becke line method (B method)) based on JIS K7142 (1996). In addition, the refractive index of a binder matrix means the refractive index of the film | membrane after forming a film | membrane with a binder matrix. When an ionizing radiation curable binder matrix forming material that is cured by ionizing radiation is used, the refractive index of the binder matrix is the refractive index of the film after being cured by irradiation with ionizing radiation. In other words, the refractive index at the portion of the antiglare layer excluding the particles becomes the refractive index of the binder matrix.

  Moreover, in the anti-glare film of this invention, it is preferable that the average film thickness H of an anti-glare layer exists in the range of 3 micrometers or more and 30 micrometers or less. When the average film thickness H of the antiglare layer is less than 3 μm, the obtained antiglare film may not be able to obtain sufficient hardness to be provided on the display surface. On the other hand, when the average film thickness H of the antiglare layer exceeds 30 μm, the cost is high, and the degree of curling of the obtained antiglare film is increased, which is not suitable for a processing step for providing on the display surface. Sometimes. In addition, the average film thickness H of a more preferable anti-glare layer is in the range of 4 μm or more and 20 μm or less.

  In the antiglare film of the present invention, the particles are preferably particles made of a copolymer of styrene and methyl methacrylate or particles made of methyl methacrylate. In the antiglare film of the present invention, an acrylic material is used as a binder matrix forming material, and an antiglare layer is formed by irradiating ionizing radiation to an acrylic material coated on a transparent substrate. When provided on the display surface, an antiglare film having sufficient scratch resistance can be obtained.

  When an acrylic material is used as the binder matrix forming material, it is preferable to use particles made of a copolymer of styrene and methyl methacrylate or particles made of methyl methacrylate as the particles. In particles made of a copolymer of styrene and methyl methacrylate or particles made of methyl methacrylate, the compatibility with the binder matrix forming material is good, and the behavior of the particles in the binder matrix can be easily controlled. It is possible to easily form an antiglare layer having 60 ° gloss and haze within a predetermined range. In the case of particles made of a copolymer of styrene and methyl methacrylate, the refractive index of the particles can be easily changed by changing the copolymerization ratio of styrene and methyl methacrylate.

  Further, in the antiglare film of the present invention, an acrylic material in which the binder matrix forming material has a hydroxyl group when particles made of a copolymer of styrene and methyl methacrylate or particles made of methyl methacrylate are used as particles. It is preferable to contain. By using acryl-styrene copolymer particles or methyl methacrylate particles as particles and adding an acrylic material having a hydroxyl group to the binder matrix, the particles are prevented from agglomerating in the binder matrix, and 60 ° gloss and haze are obtained. It is possible to more easily form an antiglare layer having a value within a predetermined range.

  This is because acryl-styrene copolymer particles or particles consisting of methyl methacrylate are used as particles, and an acrylic material having a hydroxyl group in the binder matrix is used, so that carbonyl present in the acrylic portion of the acrylic-styrene copolymer particles. This is thought to be because the particles can be prevented from aggregating due to the interaction between the groups and the hydroxyl groups present in the binder matrix.

  The antiglare film of the present invention is provided with a functional layer having antireflection performance, antistatic performance, antifouling performance, electromagnetic wave shielding performance, infrared absorption performance, ultraviolet absorption performance, color correction performance, and the like as necessary. Examples of these functional layers include an antireflection layer, an antistatic layer, an antifouling layer, an electromagnetic wave shielding layer, an infrared absorption layer, an ultraviolet absorption layer, and a color correction layer. These functional layers may be a single layer or a plurality of layers. The functional layer may have a plurality of functions as a single layer, such as an antireflection layer having antifouling performance. In addition, these functional layers may be provided between the transparent substrate and the antiglare layer, or may be provided on the antiglare layer. In the present invention, a primer layer, an adhesive layer, or the like may be provided between each layer in order to improve adhesion between various layers.

  The cross-sectional schematic diagram of the anti-glare film of another aspect of this invention was shown in FIG. The antiglare film 1 of another aspect of the present invention includes an antiglare layer 12 on a transparent substrate 11, and a functional layer 13 is provided on the antiglare layer 12. The functional layer is selected from an antistatic layer, an antireflection layer, an antifouling layer, and the like. Among these, an antireflection layer is suitably provided as a functional layer provided on the antiglare layer. By providing the antireflection layer on the antiglare layer, it is possible to further reduce the degree of reflection of external light incident on the antiglare film surface. By providing an antireflection layer on the antiglare layer, not only is the external light incident on the antiglare film scattered by the uneven structure on the surface of the antiglare layer, but also the external light incident on the antiglare film interferes with the antireflection layer. By doing so, reflection of external light can be prevented. Further, the functional layer may have a plurality of functions as a single layer, such as an antireflection layer having antifouling performance. The antireflection layer may be an antireflection layer composed of a single low refractive index layer, or may be an antireflection layer comprising a repeating structure of a low refractive index layer and a high refractive index layer. Absent.

  FIG. 4 shows a schematic cross-sectional view of a transmissive liquid crystal display using the antiglare film of the present invention. 4A includes a backlight unit 5, a polarizing plate 4, a liquid crystal cell 3, a polarizing plate 2, and an antiglare film 1 in this order. At this time, the antiglare film 1 side becomes the observation side, that is, the display surface.

  The backlight unit 5 includes a light source and a light diffusion plate. The liquid crystal cell has a structure in which an electrode is provided on one transparent substrate, an electrode and a color filter are provided on the other transparent substrate, and liquid crystal is sealed between both electrodes. The polarizing plate provided so as to sandwich the liquid crystal cell 3 has a structure in which the polarizing layers 23 and 43 are sandwiched between the transparent base materials 21, 22, 41 and 42.

  In Fig.4 (a), it is the transmissive | pervious liquid crystal display provided with the transparent base material 11 of the anti-glare film 1, and the transparent base material of the polarizing plate 2 separately. On the other hand, in FIG. 4B, the polarizing layer 23 is provided on the surface opposite to the antiglare layer of the transparent base material 11 of the antiglare film 1, and the transparent base material 11 is the antiglare film 1. It has a structure that doubles as a transparent substrate and a transparent substrate of the polarizing plate 2, and an antiglare film is a part of the polarizing plate. As shown in FIG. 4B, in the antiglare film 1 of the present invention, the polarizing layer 23 and the transparent substrate 22 are provided on the surface of the transparent substrate 11 opposite to the surface on which the antiglare layer 12 is formed. The polarizing plate 2 can be obtained.

  Moreover, in the transmissive liquid crystal display of this invention, you may provide another functional member. Other functional members include, for example, a diffusion film, a prism sheet, a brightness enhancement film for effectively using light emitted from a backlight, a phase difference of a liquid crystal cell, and a viewing angle characteristic of a polarizing plate. However, the transmission type liquid crystal display of the present invention is not limited to these.

  Next, it shows about the manufacturing method of the anti-glare film of this invention.

  In the method for producing an antiglare film of the present invention, a coating liquid for forming an antiglare layer containing at least a binder matrix-forming material that is cured by ionizing radiation and organic particles is applied onto a transparent substrate, An antiglare layer can be formed on a transparent substrate by providing a step of forming a coating film and a curing step of curing the binder matrix forming material with ionizing radiation.

  As the transparent substrate used in the present invention, glass, plastic film or the like can be used. The plastic film only needs to have appropriate transparency and mechanical strength. For example, polyethylene terephthalate (PET), triacetyl cellulose (TAC), diacetyl cellulose, acetyl cellulose butyrate, polyethylene naphthalate (PEN), cycloolefin polymer, polyimide, polyethersulfone (PES), polymethyl methacrylate (PMMA), A film such as polycarbonate (PC) can be used. Among them, a triacetyl cellulose film can be suitably used because it has little birefringence and good transparency. In particular, when the antiglare film of the present invention is provided on the surface of a liquid crystal display, as a transparent substrate. It is preferable to use a triacetyl cellulose film.

  Further, as shown in FIG. 4B, it is also possible to provide a polarizing layer on the surface opposite to the surface on which the antiglare layer of the transparent substrate is provided. At this time, as a polarizing layer, what consists of extended polyvinyl alcohol (PVA) which added the iodine can be illustrated. At this time, the polarizing layer is sandwiched between the transparent substrate and another transparent substrate.

  The coating liquid for forming the antiglare layer includes at least a binder matrix forming material that is cured by ionizing radiation and organic particles. At this time, an ionizing radiation curable material can be used as the binder matrix forming material.

  An acrylic material can be used as the ionizing radiation curable material for forming the antiglare layer. The acrylic material is synthesized from a monofunctional or polyfunctional (meth) acrylate compound such as acrylic acid or methacrylic acid ester of polyhydric alcohol, diisocyanate and polyhydric alcohol, and hydroxyester of acrylic acid or methacrylic acid. Such a polyfunctional urethane (meth) acrylate compound can be used. Besides these, as ionizing radiation type materials, polyether resins having an acrylate functional group, polyester resins, epoxy resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, and the like can be used. .

  In the present invention, “(meth) acrylate” refers to both “acrylate” and “methacrylate”. For example, “urethane (meth) acrylate” indicates both “urethane acrylate” and “urethane methacrylate”.

  Examples of the monofunctional (meth) acrylate compound include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl ( (Meth) acrylate, t-butyl (meth) acrylate, glycidyl (meth) acrylate, acryloylmorpholine, N-vinylpyrrolidone, tetrahydrofurfuryl acrylate, cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isobornyl (meth) ) Acrylate, isodecyl (meth) acrylate, lauryl (meth) acrylate, tridecyl (meth) acrylate, cetyl (meth) acrylate, stearyl (meth) acrylate, benzyl (Meth) acrylate, 2-ethoxyethyl (meth) acrylate, 3-methoxybutyl (meth) acrylate, ethyl carbitol (meth) acrylate, phosphoric acid (meth) acrylate, ethylene oxide modified phosphoric acid (meth) acrylate, phenoxy (meta) ) Acrylate, ethylene oxide modified phenoxy (meth) acrylate, propylene oxide modified phenoxy (meth) acrylate, nonylphenol (meth) acrylate, ethylene oxide modified nonylphenol (meth) acrylate, propylene oxide modified nonylphenol (meth) acrylate, methoxydiethylene glycol (meth) Acrylate, methoxypolyethylene glycol (meth) acrylate, methoxypropylene glycol (meth) acrylate 2- (meth) acryloyloxyethyl-2-hydroxypropyl phthalate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, 2- (meth) acryloyloxyethyl hydrogen phthalate, 2- (meth) acryloyloxypropyl hydrogen Phthalate, 2- (meth) acryloyloxypropyl hexahydrohydrogen phthalate, 2- (meth) acryloyloxypropyl tetrahydrohydrogen phthalate, dimethylaminoethyl (meth) acrylate, trifluoroethyl (meth) acrylate, tetrafluoropropyl (meth) acrylate , Hexafluoropropyl (meth) acrylate, octafluoropropyl (meth) acrylate, octafluoropropyl (meth) acrylate, 2 -Adamantane derivatives mono (meth) acrylates such as adamantyl acrylate having a monovalent mono (meth) acrylate derived from adamantane and adamantanediol.

  Examples of the bifunctional (meth) acrylate compound include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, butanediol di (meth) acrylate, hexanediol di (meth) acrylate, and nonanediol di (meth). ) Acrylate, ethoxylated hexanediol di (meth) acrylate, propoxylated hexanediol di (meth) acrylate, diethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, polypropylene glycol di (Meth) acrylate, neopentyl glycol di (meth) acrylate, ethoxylated neopentyl glycol di (meth) acrylate, tripropylene glycol Ruji (meth) acrylate, di (meth) acrylate, such as hydroxypivalic acid neopentyl glycol di (meth) acrylate.

  Examples of the trifunctional or higher functional (meth) acrylate compound include trimethylolpropane tri (meth) acrylate, ethoxylated trimethylolpropane tri (meth) acrylate, propoxylated trimethylolpropane tri (meth) acrylate, and tris 2-hydroxy. Ethyl isocyanurate tri (meth) acrylate, glycerol tri (meth) acrylate, tri (meth) acrylate such as glycerin PO-added triacrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, ditrimethylolpropane tri Trifunctional (meth) acrylate compounds such as (meth) acrylate, pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra (meth) a Tetrafunctionality such as relate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, ditrimethylolpropane penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, ditrimethylolpropane hexa (meth) acrylate Examples thereof include the above polyfunctional (meth) acrylate compounds and polyfunctional (meth) acrylate compounds in which a part of these (meth) acrylates is substituted with an alkyl group or ε-caprolactone.

  Moreover, polyfunctional urethane acrylate can also be used as an acrylic material. The urethane acrylate is obtained by reacting a polyhydric alcohol, a polyvalent isocyanate, and a hydroxyl group-containing acrylate. Specifically, Kyoeisha Chemical Co., Ltd., UA-306H, UA-306T, UA-306l, etc., Nippon Synthetic Chemical Co., Ltd., UV-1700B, UV-6300B, UV-7600B, UV-7605B, UV-7640B, UV -7650B, etc., Shin-Nakamura Chemical Co., Ltd., U-4HA, U-6HA, UA-100H, U-6LPA, U-15HA, UA-32P, U-324A, etc., Daicel UCB, Ebecryl-1290, Ebecryl -1290K, Ebecryl-5129, etc., manufactured by Negami Kogyo Co., Ltd., UN-3220HA, UN-3220HB, UN-3220HC, UN-3220HS, etc. can be mentioned, but not limited thereto.

  In the antiglare film of the present invention, when particles made of a copolymer of styrene and methyl methacrylate or particles made of methyl methacrylate that is acrylic particles are used as the binder matrix forming material, Preferably contains an acrylic material having a hydroxyl group. As the acrylic material having a hydroxyl group, hydroxyethyl acrylate, hydroxyethyl methacrylate, pentaerythritol triacrylate, or dipentaerythritol pentaacrylate can be used. Among these, pentaerythritol triacrylate can be preferably used.

  In addition to the ionizing radiation curable material, a thermoplastic resin or the like can be added as the binder matrix forming material. Examples of the thermoplastic resin include cellulose derivatives such as acetylcellulose, nitrocellulose, acetylbutylcellulose, ethylcellulose, and methylcellulose, vinyl acetate and copolymers thereof, vinyl chloride and copolymers thereof, vinylidene chloride and copolymers thereof, and the like. Acetal resins such as acrylic resins, polyvinyl formal, polyvinyl butyral, acrylic resins and copolymers thereof, acrylic resins such as methacrylic resins and copolymers thereof, polystyrene resins, polyamide resins, linear polyester resins, polycarbonate resins, etc. it can. By adding a thermoplastic resin, the adhesion between the transparent substrate and the antiglare layer can be improved. Moreover, the curling of the anti-glare film manufactured can be suppressed by adding a thermoplastic resin.

  As particles used in the present invention, acrylic particles (refractive index 1.49), acrylic-styrene copolymer particles (refractive index 1.49 to 1.59), polystyrene particles (refractive index 1.59), polycarbonate particles (Refractive index 1.58), melamine particles (refractive index 1.66), epoxy particles (refractive index 1.58), polyurethane particles (refractive index 1.55), nylon particles (refractive index 1.50), polyethylene particles (1.50 to 1.56), polypropylene particles (refractive index 1.49), silicone particles (refractive index 1.43), polytetrafluoroethylene particles (refractive index 1.35), polyvinylidene fluoride particles (refractive index) 1.42), polyvinyl chloride particles (refractive index 1.54), polyvinylidene chloride particles (refractive index 1.62), glass particles (refractive index 1.48), silica (refractive index 1. 3), or the like can be used. In the present invention, the particles may be a plurality of types of particles. Among these, particles made of a copolymer of styrene and methyl methacrylate as acrylic-styrene copolymer particles or particles made of methyl methacrylate as acrylic particles can be suitably used.

  Moreover, when using an ultraviolet-ray as ionizing radiation, a photoinitiator is added to the coating liquid for anti-glare layer formation. Although a well-known photoinitiator can be used for a photoinitiator, it is preferable to use what was suitable for the binder matrix formation material to be used. As the photopolymerization initiator, benzoin such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzyl methyl ketal, and alkyl ethers thereof are used. The usage-amount of a photoinitiator is 0.5-20 weight part with respect to 100 weight part of binder matrix formation materials. Preferably it is 1-5 weight part.

  A solvent is added to the coating solution for forming the antiglare layer as necessary. By adding a solvent, it is possible to uniformly disperse the particles and the binder matrix, and to adjust the viscosity of the coating liquid to an appropriate range when the coating liquid is applied onto the transparent substrate.

  In the present invention, when triacetyl cellulose is used as a transparent substrate and an antiglare layer is formed directly on the triacetyl film, the triacetyl cellulose film is dissolved or swollen as a solvent for the coating solution for forming the antiglare layer. It is preferable to use a mixed solvent of a solvent to be dissolved and a solvent that does not dissolve or swell the triacetylcellulose film. By using the mixed solvent, an antiglare film having sufficient adhesion at the interface between triacetylcellulose and the antiglare layer can be obtained. it can.

  At this time, as a solvent for dissolving or swelling the triacetyl cellulose film, ethers such as dibutyl ether, dimethoxymethane, dimethoxyethane, diethoxyethane, propylene oxide, dioxane, dioxolane, trioxane, tetrahydrofuran, anisole and phenetole, and acetone are used. Some methyl ketones such as methyl ethyl ketone, diethyl ketone, dipropyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, and methylcyclohexanone, and ethyl formate, propyl formate, n-pentyl formate, methyl acetate, ethyl acetate, propionic acid Esters such as methyl, propion brewed ethyl, n-pentyl acetate, and γ-ptyrolactone, methyl cellosolve, cellosolve, butyl celloso Bed, cellosolves such as cellosolve acetate. These can be used alone or in combination of two or more.

  Solvents that do not dissolve or swell the triacetyl cellulose film include aromatic hydrocarbons such as toluene, xylene, cyclohexane and cyclohexylbenzene, hydrocarbons such as n-hexane, methyl isobutyl ketone, methyl butyl ketone and the like. Examples include ketones. These can be used alone or in combination of two or more.

  In the present invention, an antiglare layer-forming coating solution is applied, and an additive called a surface conditioner is added to prevent the occurrence of coating film defects such as repellency and unevenness in the formed antiglare layer (coating film). An agent may be added. Surface modifiers are also called leveling agents, antifoaming agents, interfacial tension modifiers, and surface tension modifiers, depending on their function, all of which reduce the surface tension of the coating film (antiglare layer) that is formed. Is provided.

  Examples of additives that are usually used as surface conditioners include silicone additives, fluorine additives, acrylic additives, and the like. As the silicone-based additive, a derivative having polydimethylsiloxane as a basic structure and having a modified side chain of the polydimethylsiloxane structure is used. For example, polyether-modified dimethylsiloxane is used as a silicone additive. Further, as the fluorine-based additive, a compound having a perfluoroalkyl group is used.

  As the acrylic additive, a compound having a basic structure in which an acrylic monomer, a methacrylic monomer, or a styrene monomer is polymerized can be used. In addition, in the case of acrylic additives, the basic structure is a structure obtained by polymerizing acrylic monomers, methacrylic monomers, and styrene monomers, and substituents such as alkyl groups, polyether groups, polyester groups, hydroxyl groups, and epoxy groups in the side chain. May be contained.

  Moreover, in the coating liquid for anti-glare layer formation of this invention, you may add another additive other than the surface regulator mentioned above in the coating liquid. However, it is preferable that these additives do not affect the transparency and light diffusibility of the antiglare layer to be formed. As functional additives, antistatic agents, ultraviolet absorbers, infrared absorbers, antifouling agents, water repellents, refractive index modifiers, adhesion improvers, curing agents, and the like can be used, thereby forming The antiglare layer can have functions other than the antiglare function such as an antistatic function, an ultraviolet absorption function, an infrared absorption function, an antifouling function, and a water repellent function.

The antiglare layer-forming coating solution is applied onto a transparent substrate to form a coating film.
As a coating method for applying the antiglare layer forming coating liquid on the transparent substrate, a coating method using a roll coater, reverse roll coater, gravure coater, knife coater, bar coater, or die coater can be used. . Among them, it is preferable to use a die coater that can be applied at a high speed by a roll-to-roll method. The solid content concentration of the coating liquid varies depending on the coating method. The solid content concentration is preferably in the range of 30% by weight to 70% by weight.

  Next, the die coater coating apparatus of the present invention will be described. FIG. 5 shows a schematic diagram of the die coater coating apparatus of the present invention. In the die coater coating apparatus of the present invention, a die head 90 and a coating liquid tank 92 are connected by a pipe 91, and a coating liquid for forming an antiglare layer in the coating liquid tank 92 is fed into the die head 90 by a liquid feeding pump 93. It has a structure. The coating liquid fed to the die head 90 discharges the coating liquid from the slit gap, and a coating film is formed on the transparent substrate 11. By using the roll type transparent base material 11 and the rotating roll 95, a coating film can be continuously formed on the transparent base material by a roll-to-roll method.

  The antiglare layer is formed by irradiating the coating film obtained by applying the antiglare layer forming coating solution on the transparent substrate with ionizing radiation. As the ionizing radiation, ultraviolet rays and electron beams can be used. In the case of ultraviolet curing, a light source such as a high pressure mercury lamp, a low pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, a carbon arc, or a xenon arc can be used. In the case of electron beam curing, electron beams emitted from various electron beam accelerators such as cockloftwald type, bandegraph type, resonant transformer type, insulated core transformer type, linear type, dynamitron type, and high frequency type can be used. .

  At this time, you may provide the drying process for removing the solvent of a coating liquid before and after the process of forming an anti-glare layer by hardening. Moreover, you may perform hardening and drying simultaneously. In particular, when the coating liquid contains a binder matrix material, particles, and a solvent, it is necessary to provide a drying step before irradiation with ionizing radiation in order to remove the solvent of the formed coating film. That is, a coating process for applying a coating solution for forming an antiglare layer on a transparent substrate, a drying process for drying a coating film applied on the transparent substrate, and an ionizing radiation irradiation for irradiating the coating film on the transparent substrate with ionizing radiation An antiglare layer is formed on the transparent substrate in the order of the steps. Examples of the drying means include heating, air blowing, and hot air.

  As described above, the antiglare film of the present invention is produced.

  Next, a method for forming an antireflection layer of an antiglare film having an antireflection layer as a functional layer on the antiglare layer as shown in FIG. 3 will be described. Examples of the antireflection layer include an antireflection layer having a single layer structure composed of a single low refractive index layer, and an antireflection layer having a laminated structure composed of a repeating structure of a low refractive index layer and a high refractive index layer. In addition, as a method for forming the antireflection layer, a wet film formation method in which a coating solution for forming an antireflection layer is applied to the surface of the antiglare layer and a vacuum film formation method such as a vacuum deposition method, a sputtering method, or a CVD method are used. It is divided into the method of forming by the method.

  Hereinafter, a method of forming a low refractive index layer single layer by a wet film-forming method by applying a low refractive index layer forming coating liquid on the antiglare layer surface as an antireflection layer will be described. At this time, the film thickness (d) of the single layer of the low refractive index layer as the antireflection layer is the optical film thickness (nd) obtained by multiplying the film thickness (d) by the refractive index (n) of the low refractive index layer. Is designed to be equal to ¼ of the wavelength of visible light. As the low refractive index layer, a layer in which low refractive particles are dispersed in a binder matrix can be used.

The low-refractive particles are made of a low-refractive material such as LiF, MgF, 3NaF.AlF or AlF (all having a refractive index of 1.4), or Na ₃ AlF ₆ (cryolite, having a refractive index of 1.33). Low refractive index particles can be used. Moreover, the particle | grains which have a space | gap inside a particle | grain can be used suitably. In the case of particles having voids inside the particles, the voids can be made to have a refractive index of air (≈1), so that they can be low refractive index particles having a very low refractive index. Specifically, low refractive index silica particles having voids inside can be used.

  An ionizing radiation curable material can also be used as the binder matrix forming material. As the ionizing radiation curable material, an acrylic material can be used as in the case of the coating liquid for forming the antiglare layer. As the acrylic material, as in the case of the coating solution for forming the antiglare layer, monofunctional or polyfunctional (meth) acrylate compounds such as acrylic acid or methacrylic acid ester of polyhydric alcohol, diisocyanate and polyhydric alcohol, and A polyfunctional urethane (meth) acrylate compound synthesized from a hydroxy ester of acrylic acid or methacrylic acid can be used. Besides these, as ionizing radiation type materials, polyether resins having an acrylate functional group, polyester resins, epoxy resins, alkyd resins, spiroacetal resins, polybutadiene resins, polythiol polyene resins, and the like can be used. .

  Moreover, metal alkoxides, such as silicon alkoxides, such as tetramethoxysilane and tetraethoxysilane, can be used as a binder matrix forming material. These can be made into an inorganic or organic-inorganic composite binder matrix by hydrolysis and dehydration condensation.

  In addition, the low refractive index layer can be formed not only by dispersing low refractive index particles in a binder matrix but also from a fluorine-based organic material having a low refractive index without using low refractive index particles. It is.

  These low refractive index layer-forming coating solutions containing a low refractive index material and a binder matrix forming material are applied to the surface of the antiglare layer. At this time, a solvent and various additives can be added to the coating solution for forming a low refractive index layer, if necessary. Solvents include aromatic hydrocarbons such as toluene, xylene, cyclohexane and cyclohexylbenzene, hydrocarbons such as n-hexane, dibutyl ether, dimethoxymethane, dimethoxyethane, diethoxyethane, propylene oxide, dioxane, dioxolane, and trioxane. , Ethers such as tetrahydrofuran, anisole and phenetole, and ketones such as methyl isobutyl ketone, methyl butyl ketone, acetone, methyl ethyl ketone, diethyl ketone, dipropyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, and methylcyclohexanone, Ethyl formate, propyl formate, n-pentyl formate, methyl acetate, ethyl acetate, methyl propionate, propion brewed ethyl, n-pentyl acetate, In consideration of coating suitability among esters such as γ-ptyrolactone, cellosolves such as methyl cellosolve, cellosolve, butyl cellosolve, cellosolve acetate, alcohols such as methanol, ethanol, isopropyl alcohol, water, etc. It is selected appropriately. Further, as an additive, a surface conditioner, an antistatic agent, an antifouling agent, a water repellent, a refractive index adjuster, an adhesion improver, a curing agent, and the like can be added.

  Moreover, as a coating method, the coating method using a roll coater, a reverse roll coater, a gravure coater, a knife coater, a bar coater, and a die coater can be used.

  Then, if an ionizing radiation curable material is used as the binder matrix forming material for the coating film obtained by applying the coating liquid on the transparent substrate, the coating film is dried as necessary. Then, a low refractive index layer is formed by irradiating with ionizing radiation. Further, when a metal alkoxide is used as the binder matrix forming material, the low refractive index layer is formed by drying, heating, or the like.

  Moreover, as an antireflection layer, it can be set as the antireflection layer which has the laminated structure which consists of a repeating structure of a low refractive index layer and a high refractive index layer. For example, by sequentially depositing titanium oxide as a high refractive index layer, silicon oxide as a low refractive index layer, titanium oxide as a high refractive index layer, and silicon oxide as a low refractive index layer in order from the antiglare layer side. It can also be used as an antireflection layer.

  Further, in providing an antistatic layer as a functional layer in the antiglare film of the present invention, a method of forming a conductive material such as a metal and a metal oxide by a vacuum film forming method to form an antistatic layer, A method of forming an antistatic layer by applying a coating liquid in which a conductive material such as metal and metal oxide is dispersed in a binder matrix forming material can be used.

  Examples and comparative examples are shown below.

<Example 1>
A triacetyl cellulose film (TD-80U manufactured by Fuji Photo Film) was used as a transparent substrate. As a binder matrix forming material, 25 parts by weight of pentaerythritol triacrylate (PE3A (acrylic material 1)) which is an acrylic material having a hydroxyl group in the molecule, dipentaerythritol hexaacrylate (acrylic material having no hydroxyl group in the molecule) DPHA (acrylic material 2)) 69.5 parts by weight, Irgacure 184 (Ciba Japan Co., Ltd.) 5.0 parts by weight as a polymerization initiator, BYK350 (Bicchemy Japan Co., Ltd.) 0.5 parts by weight as an acrylic additive Prepared. Furthermore, 3.0 parts by weight of acrylic-styrene copolymer particles having an average particle diameter of 3.5 μm and a refractive index of 1.57 were prepared as particles. As a solvent, a mixed solvent of 30 parts by weight of dioxolane and 70 parts by weight of toluene was prepared. Then, a binder matrix forming material, acrylic-styrene copolymer particles, and a solvent were mixed to obtain a coating solution for forming an antiglare layer.

Using the resulting antiglare layer-forming coating solution, apply the coating solution on a triacetyl cellulose film with a die coater coating device, evaporate the solvent by applying heat after forming the coating film, and then use a high-pressure mercury lamp An antiglare layer was produced by irradiation with ultraviolet rays at 250 mJ / cm ^{2 in} a nitrogen atmosphere. Through the above steps, an antiglare film having an antiglare layer on the triacetylcellulose film was obtained.

It was 8.3 micrometers when the average film thickness H of the anti-glare layer of the obtained anti-glare film was measured with the electronic micrometer (K351C made from Anritsu). The average particle size r of the acrylic-styrene copolymer particles was measured using a light scattering particle size distribution measuring device (SALD-7000, manufactured by Shimadzu Corporation), and the refractive index n _{A of the} particles was determined by the Becke line detection method ( (Immersion method). The refractive index n _M of the binder matrix, applying a coating solution comprising a binder matric forming material and a solvent, except for the particles, dry, 1 was measured by the Becke line detection method (immersion method) used those obtained by ultraviolet curing. 53.

< Reference Example 1 >
In Example 1, the refractive index n _{A of} the particles, the amount of added particles, and the average film thickness H of the antiglare layer were changed, and the others were the same as in Example 1, and the antiglare layer was formed on the triacetyl cellulose film. An anti-glare film was prepared.

< Reference Example 2 >
In Example 1, the refractive index n _{A of} the particles, the amount of added particles, and the average film thickness H of the antiglare layer were changed, and the others were the same as in Example 1, and the antiglare layer was formed on the triacetyl cellulose film. An anti-glare film was prepared.

<Comparative Example 1>
An anti-glare film having an anti-glare layer on a triacetyl cellulose film was prepared in the same manner as in (Example 1) except that the average film thickness H of the anti-glare layer in Example 1 was changed.

<Comparative example 2>
In Example 1, the refractive index n _{A of} the particles, the amount of added particles, and the average film thickness H of the antiglare layer were changed, and the others were the same as in Example 1, and the antiglare layer was formed on the triacetyl cellulose film. An anti-glare film was prepared.

<Comparative Example 3>
In Example 1, the refractive index n _{A of} the particles, the amount of added particles, and the average film thickness H of the antiglare layer were changed, and the others were the same as in Example 1, and the antiglare layer was formed on the triacetyl cellulose film. An anti-glare film was prepared.

(Example 1 ), (Reference Example 1), (Reference Example 2), each component of the binder matrix forming material used in (Comparative Example 1) to (Comparative Example 3), the amount of each component added, and the refractive index of the binder matrix Table 1 shows the ratio, the average particle diameter r of the acrylic-styrene copolymer particles, the refractive index n _{A of} the particles, the addition amount of the particles, and the average film thickness H of the antiglare layer in the produced antiglare film.

(Example 1 ), (Reference Example 1), (Reference Example 2), (Comparative Example 1) to (Comparative Example 3), the following measurements and evaluations were performed on the antiglare films prepared.

<Measurement of glossiness>
(Example 1 ), (Reference Example 1), (Reference Example 2), (Glossary meter (VG2000, Nippon Denshoku)) for the antiglare film produced in (Comparative Example 1) to (Comparative Example 3) The 60 ° glossiness of the surface of the antiglare layer was measured according to K7105 (1981). At this time, a black cloth was pressed against the opposite side of the surface of the antiglare film having the antiglare layer, and measurement was performed so that reflection on the back surface of the triacetylcellulose film did not occur.

<Measurement of haze>
A haze meter (NDH2000, Nippon Denshoku) was prepared in accordance with JIS K7105 (1981) (Example 1 ), (Reference Example 1), (Reference Example 2), (Comparative Example 1) to (Comparative Example 3). The haze of the antiglare film was measured.
<Evaluation of reflection>
(Example 1 ), (Reference Example 1), (Reference Example 2), (Anti-glare film) produced in (Comparative Example 1) to (Comparative Example 3) was attached to a black plastic plate via an adhesive. . Place the anti-glare film attached to the black plastic plate so that the anti-glare film is horizontally beneath the fluorescent lamp, and look into the anti-glare film from directly above so that the reflected fluorescent lamp image is not hidden. The anti-glare film was evaluated for reflection. The case where the image of the fluorescent lamp reflected on the surface of the antiglare layer was blurred was indicated by a circle (◯), and the case where the image was clearly visible was indicated by a cross (×).

<Evaluation of whiteness>
(Example 1 ), (Reference Example 1), (Reference Example 2), (Anti-Glare Film) produced in (Comparative Example 1) to (Comparative Example 3) was attached to a black plastic plate via an adhesive. In the state, a fluorescent lamp was reflected, and the light diffusion state over the entire surface of the antiglare layer was evaluated. Circles (○) indicate that light diffusion is small and the entire glare-proof layer is not white. Check if the entire glare-proof layer is white as well as the part where the fluorescent light is reflected. Indicated by a mark (x).

<Evaluation of contrast>
(Example 1 ), (Reference Example 1), (Reference Example 2), and the anti-glare film produced in (Comparative Example 1) to (Comparative Example 3) using a luminance meter (TOPCOM-BM7), with an illuminance of 200 lux. In a bright room and a dark room, measure the brightness (white brightness) when the display of the anti-glare film provided on the liquid crystal display surface is white and the brightness (black brightness) when the display is black. The brightness was taken as contrast. At this time the contrast of the antiglare film has no antiglare layer, that is, the contrast reduction rate in the bright room is less than 45% compared to the contrast required when the reacetylcellulose film is provided on the liquid crystal display, In addition, when the reduction rate in the dark room was less than 3%, the contrast was good and indicated by a circle (◯). Further, a cross mark (x) indicates that the decrease rate in the bright room is 45% or more, or the decrease rate in the dark room is 3% or more.

(Table 2) shows the evaluation results of the antiglare films prepared in (Example 1 ), (Reference Example 1), (Reference Example 2), and (Comparative Example 1) to (Comparative Example 3).

In the antiglare films of ( Example 1 ), (Reference Example 1), and (Reference Example 2) , the 60 ° gloss is in the range of 110% to 130%, and the haze value is 2% to 12%. It was possible to produce an antiglare film, which was not whitened, had good contrast, and was able to sufficiently prevent reflection of external light. In addition, an antiglare film with reduced glare was obtained.

  In the anti-glare films of (Comparative Example 1) and (Comparative Example 2), the desired haze value and 60 ° gloss were not obtained. Therefore, although it could have anti-glare properties, the anti-glare film became white and a good contrast could not be obtained.

  In (Comparative Example 3), the 60 ° gloss was 110% or more, but a desired haze value was not obtained. Therefore, it was not white and good contrast could be obtained, but sufficient anti-glare property could not be obtained.

DESCRIPTION OF SYMBOLS 1 Anti-glare film 11 Transparent base material 12 Anti-glare layer 120 Binder matrix 121 Particle 13 Functional layer 2 Polarizing plate 21 Transparent base material 22 Transparent base material 23 Polarizing layer 3 Liquid crystal cell 41 Transparent base material 42 Transparent base material 43 Polarizing layer 5 Back Light unit 83 Light source 84 Observer 90 Die head 91 Piping 92 Coating liquid tank 93 Liquid feed pump 95 Rotating roll

Claims (5)

An antiglare film having an antiglare layer comprising a binder matrix and particles on one surface of a transparent substrate,
The 60 ° glossiness on the antiglare film surface on the antiglare layer side is in the range of 110% to 130%, and
The haze value of the antiglare film is in the range of 10.3% to 12%, and
Ri average thickness der within less than 3 [mu] m 8.3 .mu.m of the antiglare layer,
The particles are acrylic-styrene copolymer particles;
The average film thickness of the antiglare layer is a value obtained by multiplying the average particle diameter of particles contained in the antiglare layer by 1.3.
Or more within the range of the average particle diameter of the particles multiplied by 3.5 or less,
The refractive index difference between the refractive index of the binder matrix and the refractive index of the particles is 0.04 or less,
The binder matrix forming material for forming the binder matrix has a hydroxyl group.
An antiglare film comprising an acrylic material . Antiglare film according to claim 1, wherein the particles have a particle element made of a copolymer of styrene and methyl methacrylate. From the observer side in this order, an antiglare film according to claim 1 or 2, a polarizing plate, a liquid crystal cell, a polarizing plate, a backlight unit in this order, and characterized in that the antiglare layer on the surface of the viewer side A transmissive liquid crystal display. An anti-glare film according to any one of claims 1 to 3 , and a polarizing layer and a transparent substrate on a surface opposite to the anti-glare layer forming surface of the transparent substrate of the anti-glare film. Polarizer. A transmissive liquid crystal display comprising the polarizing plate according to claim 4 , a liquid crystal cell, a polarizing plate, and a backlight unit in this order from the viewer side, and an antiglare layer on the surface on the viewer side. .

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