KR20120109525A - Optical laminate and method for producing optical laminate - Google Patents

Abstract

The optical laminated body which prevents projection of the outer diameter, the glare, and the fall of contrast, is excellent in visibility and the color reproducibility of an image. It is an optical laminated body which has an anti-glare layer on a transparent base material at least, The said anti-glare layer has an uneven | corrugated shape on the surface on the opposite side to the said transparent base material, The said uneven | corrugated shape is formed by the phase separation of the binder resin which comprises the said anti-glare layer. It is an optical laminated body which consists of the formed uneven | corrugated shape (A) and the uneven | corrugated shape (B) formed by the internal particle contained in the said glare-proof layer, and 10 point average roughness Rz is less than 3 micrometers.

Description

Optical laminated body and manufacturing method of optical laminated body {OPTICAL LAMINATE AND METHOD FOR PRODUCING OPTICAL LAMINATE}

This invention relates to the optical laminated body and the manufacturing method of an optical laminated body.

As protective films for image display screens such as displays, monitors, and touch panels, hard coat properties (scratch resistance), antistatic properties (prevention of dust adhesion, prevention of disturbance of orientation due to charging of liquid crystal), antireflection properties (improving visibility) The optical laminated body containing the functional layer which has performance, such as anti-glare property and antifouling property (anti-fingerprint prevention), is known.

In the said optical laminated body, it is known to equip the surface with the anti-glare layer which has an uneven | corrugated shape especially in order to improve the visibility deterioration by reflection of external light to an image display surface, or projection of an external diameter. When the optical laminated body which has such an anti-glare layer is installed in the high-definition type liquid crystal display etc. which have become mainstream in recent years, image light scatters by the said uneven | corrugated shape, and what is called a flashing generate | occur | produce. In order to prevent this glare, it is known to form a single layer having an internal scattering property in the optical laminate to have a two-layer structure.

However, in recent years, the glare prevention performance by a one-layer structure is calculated | required in order to achieve thinning of an optical laminated body further.

For example, in patent document 1, it is an anti-glare hard coat film which provided the anti-glare hard coat layer in the single side | surface of a transparent plastic film, The said anti-glare hard coat layer contains two types of resin and a pigment, It is disclosed that the surface haze is caused by irregularities formed by phase separation of the two resins, and the internal haze is caused by internal scattering by pigments having different refractive indices from the two resins. .

Patent Document 2 is an antiglare film composed of an antiglare layer and a resin layer having a low refractive index, and has an uneven structure on its surface, and isotropically transmits and scatters incident light so as to provide a specific scattering angle, a specific total light transmittance, haze, and sharpness. The anti-glare film which has is disclosed.

Moreover, in patent document 3, the hardened | cured material of (A) active-energy-ray-curable compound and (B) thermoplastic resin are contained in a specific ratio on a base film, (A) component and (B) component form a phase-separated structure, The hard coat film which has a hard coat layer which has a specific internal haze value is disclosed.

However, these optical laminated bodies are suitably given anti-glare property and anti-glare property, especially when used in a high-definition image panel that has recently been developed, but the uneven shape formed by the phase separation structure tends to be a regular pattern. For this reason, there is a problem that the moire is generated between the lattice patterns of the pixels of the display or the contrast decreases due to the white blurring.

In recent years, in image display apparatuses, there is a gloss blackness (good gray to gray gradation, and a moving image is clear, including antireflection and anti-glare), that is, display performance without moire and white blur. Improvement is required. In order to cope with this, a constitution that further refines the concave-convex shape of the antiglare layer and imparts internal scattering property to the inside of the coating film is required in a range that does not deteriorate the surface performance currently maintained besides antiglare property and anti-glare property. .

Japanese Patent Laid-Open No. 2008-299007 Japanese Patent Laid-Open No. 2006-103070 Japanese Patent Publication No. 2009-29126

This invention aims at providing the optical laminated body which was excellent in visibility and color reproducibility, by preventing the fall of projection, glitter, and contrast of an outer diameter in view of the said present situation.

1st this invention is an optical laminated body which has an anti-glare layer on an optically transparent base material at least, The said anti-glare layer has an uneven | corrugated shape in the surface on the opposite side to the said transparent base material, The said uneven | corrugated shape comprises the said anti-glare layer Concave-convex shape (A) formed by phase separation of the binder resin and concave-convex shape (B) formed by internal particles included in the antiglare layer, wherein the concave-convex shape (A) is a convex portion is an island portion, and concave The island-in-sea structure which is an additional sea part is comprised, and the said internal particle exists in the sea part of the said island-in-law structure many in the said glare-proof layer, It is an optical laminated body characterized by the above-mentioned.

Moreover, 2nd this invention is an optical laminated body which has an anti-glare layer on an optically transparent base material at least, The said anti-glare layer has an uneven | corrugated shape in the surface on the opposite side to the said transparent base material, The said uneven | corrugated shape makes the said anti-glare layer It consists of the uneven shape (A) formed by phase separation of the binder resin to comprise, and the uneven shape (B) formed by the internal particle contained in the said glare-proof layer, and 10 point average roughness Rz is less than 3 micrometers, It is characterized by the above-mentioned. It is an optical laminated body made into.

In 2nd this invention, it is preferable that ratio (Rz / Ra) of 10-point average roughness Rz and arithmetic mean roughness Ra is less than 12, and, as for the uneven | corrugated shape of the said glare-proof layer surface, the kurtosis (Rku) of a roughness curve Is preferably 4 or less.

Moreover, in 1st and 2nd this invention, the said internal particle has high affinity with respect to the resin component which contributes to formation of a recessed part rather than the resin component which contributes to formation of the convex part of the uneven shape (A) of the anti-glare layer surface. It is preferable.

This invention is also the manufacturing method of the optical laminated body which has an anti-glare layer on an optically transparent base material at least, and apply | coats the composition for anti-glare layers containing 2 or more types of binder resins and internal particles which are incompatible with each other on the said transparent base material, It is also a manufacturing method of the optical laminated body which has a process of forming a coating film, and the process of hardening the said coating film, and forming an anti-glare layer.

EMBODIMENT OF THE INVENTION Below, this invention is demonstrated in detail.

The 1st and 2nd this invention has an anti-glare layer on an optically transparent base material at least, The said anti-glare layer has an uneven | corrugated shape specific on the surface on the opposite side to a transparent base material, It is an optical laminated body characterized by the above-mentioned. For this reason, when the optical laminated bodies of the 1st and 2nd this invention are installed in a high-definition image panel, the contrast of an image is not reduced but the projection of an outer diameter, the sparkling, and the generation of moire can be prevented. .

In the optical laminated body of 1st and 2nd this invention, an anti-glare layer has an uneven | corrugated shape in the surface on the opposite side to a light transmissive base material, The said uneven | corrugated shape is the uneven | corrugated shape formed by phase separation of the binder resin which comprises the said anti-glare layer. (A) and the uneven shape (B) formed by the internal particles contained in the antiglare layer.

Conventionally, the surface uneven | corrugated shape of an anti-glare layer was formed only by organic or inorganic particle | grains, such as a pigment and a filler, or by phase separation of a resin component.

However, the optical laminated body which has the uneven | corrugated shape by particle | grains on the surface of an anti-glare layer is a big uneven | corrugated shape, and has a kurtosis, and internal scattering property is appropriately provided, but the bright room contrast falls, so-called gloss blackness This was insufficient.

Moreover, the optical laminated body which has an uneven | corrugated shape by phase separation of binder resin on the surface of an anti-glare layer has a problem that an uneven | corrugated shape existed regularly and that moire by an interference with the lattice pattern of the pixel of a display is easy to generate | occur | produce. .

On the other hand, in the optical laminated body of 1st this invention, an anti-glare layer has the uneven | corrugated shape (A) formed by phase separation of binder resin, and also has the surface uneven | corrugated shape (B) formed by the added internal particle, and The concave-convex shape (A) is characterized in that the convex portion constitutes an island portion and the concave portion constitutes an ocean portion, and the inner particles are present in the sea portion of the island-in-the-sea structure in the antiglare layer.

For this reason, the surface uneven | corrugated shape of the optical laminated body of 1st this invention becomes a shape in which uneven | corrugated shape exists at random, and becomes smooth. The optical laminated body of the 1st this invention which has such a surface unevenness | corrugation has specific surface haze, and not only does projection of an outer diameter and prevention of a flash, but also moire generate | occur | produces or the contrast fall with the grid pattern of the pixel of a display. It is prevented suitably and becomes very excellent in the visibility and the color reproducibility of an image.

In the phase-separated structure, regularity easily occurs in the unevenness, and moire occurs due to interference with the lattice pattern of the pixels of the display. However, in the first invention, the uneven shape (A) formed by the phase-separated structure constitutes Since many internal particles exist in the sea portion (concave portion) of the island-in-sea structure, irregularities (B) formed by the internal particles are formed in the sea portion, so the regularity of the irregularities can be alleviated.

The surface uneven | corrugated shape of the anti-glare layer in the optical laminated body of 1st this invention uses phase separation of binder resin, and also forms using internal particle | grains. For this reason, since the uneven | corrugated shape of a surface can be controlled suitably, and also the light scattering property in a layer inside can be controlled suitably, the above-mentioned effect can be acquired.

In addition, the position of the internal particle in the said glare-proof layer can be easily distinguished by performing reflection observation and transmission observation by an optical microscope for the anti-glare layer in the optical laminated body of 1st this invention.

In addition, although the surface asperity shape of the said glare-proof layer in the optical laminated body of 1st this invention is a smooth thing as mentioned above, Specifically, of the anti-glare layer in the optical laminated body of 2nd this invention mentioned later It is desirable to meet the same requirements as surface irregularities.

Moreover, in the optical laminated body of 2nd this invention, the surface uneven | corrugated shape of the anti-glare layer which has the said uneven | corrugated shape (A) and uneven | corrugated shape (B) is controlled by the gentle shape compared with the conventional anti-glare layer.

For this reason, the surface uneven | corrugated shape of the optical laminated body of 2nd this invention becomes smooth and exists in the shape which exists at random. The optical laminated body of 2nd this invention which has such a surface unevenness | corrugation has specific surface haze, and not only the projection of an outer diameter and prevention of a flash, but also the generation of moire and the fall of contrast by interference with the lattice pattern of the pixel of a display. Can be prevented appropriately, and the visibility and the color reproducibility of the image are very excellent.

In the phase-separated structure, regularity easily occurs in the unevenness, and moire occurs due to interference with the lattice pattern of the pixel of the display. Therefore, unevenness caused by internal particles in the concave portion of the uneven shape (A) caused by the phase-separated structure. It is preferable to relax the said regularity by forming shape (B).

The surface uneven | corrugated shape of the anti-glare layer in the optical laminated body of 2nd this invention uses phase separation of binder resin, and also forms using internal particle | grains. For this reason, since the uneven | corrugated shape of a surface can be controlled suitably, and also the light scattering property in a layer inside can be controlled suitably, the above-mentioned effect can be acquired.

Specifically, the surface irregularities of the antiglare layer have a 10-point average roughness Rz of less than 3 µm. Glossy blackness and contrast fall when said 10-point average roughness Rz is 3 micrometers or more. It is preferable that the said 10-point average roughness Rz is 0.1 micrometer or more and 2 micrometers or less.

By having such a surface uneven | corrugated shape, image display with high gloss black and high contrast is attained.

In the optical laminated body of 2nd this invention, it is preferable that ratio of the said Rz and arithmetic mean roughness Ra (Rz / Ra) is less than 12 in the surface asperity shape of the said glare-proof layer further. Arithmetic mean roughness Ra is an average value of the uneven | corrugated height over the whole unevenness | corrugation, whereas the 10-point average roughness Rz has a total of 5 points | pieces in the place where the height of a convex part is high, and where the height of a concave part is low. Ten points are selected and average value of the difference of the height of the convex part and the recessed part. Therefore, a large ratio (Rz / Ra) indicates that some convex portions (or concave portions) are higher (or lower) with respect to the overall average height, and this indicates that the height of the convex portions (or concave portions) It is not constant and shows the big deviation. In that case, the large convex part (or concave part) and the small convex part (or concave part) are mixed, and the large convex part (or concave part) is disadvantageous against the glare, and the small convex part (or concave part) is Since it is disadvantageous in contrast, there is a possibility that it is disadvantageous in that both the glare and contrast are compatible. In the optical laminated body of 2nd this invention, it is preferable that the said ratio (Rz / Ra) is less than 12, and it is more preferable that it is less than 10.

As for the surface asperity shape of the said anti-glare layer in the optical laminated body of 2nd this invention, it is preferable that Crutosis (Rku) of kurtosis curve is 4 or less. If it exceeds 4, the sharpness of the unevenness is high, and therefore, the inclination angle is increased locally, and the light diffusion becomes strong, and there is a fear that the contrast (black glossiness) is impaired. As for said Rku, it is more preferable that it is three or less.

In addition, said Rz, Rku, and Ra can be calculated | required by the three-dimensional surface shape roughness measuring instrument ("New View 5000" by Zygo Corporation).

Thus, the optical laminated bodies of the 1st and 2nd this invention can prevent the projection of a diameter, glare, generation | occurrence | production of moire, and fall of contrast suitably by having the above-mentioned specific surface uneven | corrugated shape. Moreover, since the layer which has such a function can be formed in one layer, a manufacturing process becomes simple and manufacturing cost can be reduced.

Hereinafter, each structure of the optical laminated body of 1st and 2nd this invention is demonstrated in detail.

In addition, in the following description, each structure of the optical laminated body of 1st this invention and the optical laminated body of 2nd this invention is integrated, and it calls it "the optical laminated body of this invention."

The optical laminated body of this invention has a transparent base material.

As said light-transmitting base material, what has smoothness and heat resistance, and is excellent in mechanical strength is preferable.

As a specific example of the material which forms the said transparent base material, polyethylene terephthalate (PET), polyethylene naphthalate, polybutylene terephthalate, polybutylene naphthalate, triacetyl cellulose (TAC), cellulose diacetate, cellulose acetate butyrate, poly Amide, polyimide, polyethersulfone, polysulfone, polypropylene (PP), cycloolefin (COP), polymethylpentene, polyvinyl chloride, polyvinyl acetal, polyether ketone, polymethyl methacrylate, polycarbonate Or thermoplastic resins such as polyurethane. Preferably, polyethylene terephthalate, triacetyl cellulose, cycloolefin, and polypropylene are mentioned.

It is preferable that the thickness of the said transparent base material is 20-300 micrometers, More preferably, a minimum is 30 micrometers and an upper limit is 200 micrometers.

In forming an anti-glare layer etc. on the said light-transmitting base material, you may apply coating material, such as an anchor agent or a primer, in addition to physical processes, such as a corona discharge process and an oxidation process, in order to improve adhesiveness.

The optical laminated body of this invention has an anti-glare layer on the said light transmissive base material at least. The anti-glare layer has a concave-convex shape on a surface opposite to the light-transmissive base material, and the concave-convex shape is formed in the concave-convex shape (A) formed by phase separation of a binder resin constituting the anti-glare layer and the interior of the anti-glare layer. It consists of the uneven | corrugated shape (B) formed by particle | grains.

Since the anti-glare layer has such a specific surface irregularity shape, it is possible to prevent the projection due to reflection of external light, to prevent glare, and to reduce the contrast, and to provide an optical laminate having excellent visibility and color reproducibility.

The concave-convex shape (A) formed by the phase separation of the binder resin constituting the antiglare layer is an concave-convex shape formed by phase separation of a composition containing at least two kinds of binder resin components, for example, by spinodal decomposition, and the like. When it does not contain, it is observed as a structure also with a microscope. At this time, an island part is a convex part of an uneven | corrugated shape, and a sea part becomes a recessed part. In addition, the sea area is larger than the island area.

Moreover, it is preferable that the convex part of the uneven | corrugated shape (B) formed by the said internal particle is formed in the sea part of the said island-in-the-sea structure of the said uneven | corrugated shape (A).

Moreover, it is preferable that internal particle | grains are not exposed on the surface of an anti-glare layer in the convex part of the said uneven shape (B). This is because when exposed, the convex shape is not smooth and the kurtosis rises, resulting in a decrease in contrast.

The said anti-glare layer can be formed using the composition for anti-glare layers containing 2 or more types of binder resin and internal particle | grains.

It is preferable that the said 2 or more types of binder resins are mutually incompatible. If it is incompatible, there exists a possibility that phase separation may not generate | occur | produce and a desired surface uneven | corrugated shape (A) may not be formed.

Moreover, it is preferable that the said 2 or more types of binder resin decomposes spinoidal and forms uneven | corrugated shape (A) in a coating-film surface.

As said 2 or more types of binder resin, the case where it is 1 type, or 2 or more types of combinations chosen from the group which consists of a monomer, an oligomer, and resin is mentioned.

As said 2 or more types of binder resin, For example, monomers, such as a polyfunctional monomer, (meth) acrylic resin, an olefin resin, a polyether resin, a polyester resin, a polyurethane resin, a polysiloxane resin, a polysilane resin, a polyimide resin, or Resin which contains a fluororesin in frame | skeleton structure, etc. can be used. These resins may be low molecular weight so-called oligomers.

As said polyfunctional monomer, the dealcohol reactant of polyhydric alcohol and (meth) acrylate, specifically, dipentaerythritol hexa (meth) acrylate, a trimethylol propane tri (meth) acrylate, etc. are mentioned, for example. .

As resin containing the said (meth) acrylic resin in frame | skeleton structure, resin which superposed | polymerized or copolymerized the (meth) acryl monomer, resin which copolymerized the monomer which has another ethylenically unsaturated double bond with a (meth) acryl monomer, etc. are mentioned. have.

Examples of the resin containing the olefin resin in the skeleton structure include polyethylene, polypropylene, ethylene propylene copolymer, ethylene vinyl acetate copolymer, ionomer, ethylene vinyl alcohol copolymer, ethylene vinyl chloride copolymer, and the like. have.

Resin which contains the said polyether resin in a skeletal structure is resin containing an ether bond in a molecular chain, For example, polyethyleneglycol, polypropylene glycol, polytetramethylene glycol, etc. are mentioned.

Resin which contains a polyester resin in a skeletal structure is resin containing an ester bond in a molecular chain, For example, unsaturated polyester resin, an alkyd resin, polyethylene terephthalate, etc. are mentioned.

Resin which contains a polyurethane resin in a skeletal structure is resin containing a urethane bond in a molecular chain. Resin which contains polysiloxane resin in a skeletal structure is resin containing a siloxane bond in a molecular chain.

Resin which contains polysilane resin in a skeletal structure is resin containing a silane bond in a molecular chain.

Resin which contains a polyimide resin in a skeletal structure is resin containing an imide bond in a molecular chain. Resin which contains a fluororesin in skeletal structure is resin containing the structure by which one part or all hydrogen of polyethylene was substituted by fluorine.

As an oligomer and resin, the copolymer which consists of 2 or more types of the said skeleton structure may be sufficient, and the copolymer which consists of the said skeleton structure and a monomer other than that may be sufficient.

As the 2 or more types of binder resin in this invention, the oligomer or resin containing the same kind of skeletal structure may be used, and the oligomer or resin containing different skeletal structure may be used. In addition, any one of 2 or more types of binder resin may be a monomer, and the other may be oligomer or resin.

Moreover, it is preferable that 2 or more types of binder resin in this invention have functional groups which react with each other respectively. By making these functional groups react with each other, the tolerance of the anti-glare layer obtained by the composition for anti-glare layers can be improved. As a combination of such functional groups, for example, functional groups (active group, amino group, thiol group, carboxyl group, etc.) having an active hydrogen, an epoxy group, a functional group having an active hydrogen, an isocyanate group, an ethylenically unsaturated group and an ethylenically unsaturated group (ethylenically unsaturated group) Polymerization occurs), silanol group and silanol group (condensation polymerization of silanol group occurs), silanol group and epoxy group, functional group having active hydrogen and functional group having active hydrogen, active methylene and acryloyl group, oxazoline group A carboxyl group etc. are mentioned. In addition, although the reaction does not progress only by mixing only the 1st component and 2nd component included with "the functional group reacting with each other" here, it also includes reacting with each other by combining and mixing a catalyst or a hardening | curing agent. As a catalyst which can be used here, a photoinitiator, a radical initiator, an acid-base catalyst, a metal catalyst, etc. are mentioned, for example. As a hardening | curing agent which can be used, a melamine hardening | curing agent, a (block) isocyanate hardening | curing agent, an epoxy hardening | curing agent, etc. are mentioned, for example.

In this invention, it is preferable to use resin which contains a (meth) acrylic resin in frame | skeleton structure as said 2 or more types of binder resin.

It is preferable that the said 2 or more types of binder resin are 100-100000 in molecular weight (when the said 2 or more types of binder resin is resin, weight average molecular weight).

It is preferable that the difference of the SP value of the 1st component and SP value (solubility parameter) of a 2nd component contained in the said 2 or more types of binder resin is 0.5 or more. If it is less than 0.5, compatibility of resin with each other is not low enough, phase separation of a 1st component and a 2nd component may not fully be performed after application | coating of the composition for anti-glare layers, and there exists a possibility that a desired uneven | corrugated shape may not be obtained. As for the difference of said SP value, it is more preferable that it is 0.8 or more.

The said SP value can be measured by the following method, for example (Reference: SUH, CLARKE, J.P.S.A-1, 5, 1671-1681 (1967)).

Measuring temperature: 20 ℃

Sample: 0.5 g of resin is weighed into a 100 ml beaker, 10 ml of a good solvent is added using a hole pipette, and dissolved by a magnetic stirrer.

Good solvents: dioxane, acetone, etc.

Poor solvent: n-hexane, ion-exchanged water, etc.

Turbidity measurement: The poor solvent is dripped using the 50 ml burette, and the point which turbidity generate | occur | produced is made into the dropping quantity.

The SP value (δ) of the resin is given by the following equation.

_{^{δ = (V ml 1/2}} δ ml + V mh 1/2 δ mh) / (V ml 1/2 + V mh 1/2)

V _m = V ₁ V ₂ / (φ ₁ V ₂ + φ ₂ V ₁ )

δ _m = φ ₁ δ ₁ + φ ₂ δ ₂

Vi: molecular volume of solvent (ml / mol)

phi i: volume fraction of each solvent in the turbidity point

δi: SP value of the solvent

ml: Low SP poor solvent mixture system

mh: high SP poor solvent mixture

As said 2 or more types of binder resin in this invention, what is necessary is just to use suitably combining 2 or more types of resin which have the above-mentioned property, and which can be phase-separated, Especially, pentaerythritol tri (meth) acrylate and dipentaerythritol Preference is given to hexa (meth) acrylate and isobornyl (meth) acrylate.

Moreover, in this invention, either one of the 1st component and 2nd component contained in the said 2 or more types of binder resin have glass transition temperature (Tg) lower than the environmental temperature at the time of coating of the composition for anti-glare layers, and the other anti-glare It is preferable to have Tg higher than the environmental temperature at the time of coating of the layer composition.

In this case, since the resin having a Tg higher than the environmental temperature is in a glass state in which molecular motion is controlled at the environmental temperature, it is thought that the resin aggregates in the coating film after application, thereby causing phase separation of the two or more binder resins.

The said glass transition temperature (Tg) can be obtained by the method similar to the measuring method of Tg by normal dynamic viscoelasticity. This Tg can be measured using, for example, RHEOVIBRON MODEL RHEO2000, 3000 (brand name, product made from Orientec).

It is preferable that the difference of the surface tension of the 1st component contained and the surface tension of a 2nd component of the said 2 or more types of binder resin is 1-70 dyn / cm. When the difference between the surface tension of the first component and the surface tension of the second component is 1 to 70 dyn / cm, the resin having a higher surface tension tends to aggregate, whereby two or more kinds of binder resins are applied after application of the composition. It is thought that phase separation of is caused. As for the difference of the said surface tension, it is more preferable that it is 5-30dyn / cm.

The said surface tension can be measured by calculating | requiring the static surface tension measured by the lubrication method using the dichrometer made by BIC Chem.

Among the binder resins, the mixing ratio [(a) / (b)] of the resin (a), which contributes to the formation of the convex-convex portions on the surface of the antiglare layer, and the resin (b), which contributes to the formation of the recesses, is a solid content mass ratio, It is preferable that it is 0.5 / 100-20 / 100. If it is less than 0.5 / 100, unevenness | corrugation is not formed and there exists a possibility that an anti-glare property may not be acquired. When it exceeds 20/100, uneven | corrugated shape will become large too much and there exists a possibility that a glare may deteriorate. As for the said mixing ratio, it is more preferable that it is 1/100-10/100. The said resin (a) and the said resin (b) are suitably selected from 2 or more types of binder resin mentioned above.

It is preferable that the said internal particle has affinity with respect to the resin component which contributes to formation of a recessed part rather than the resin component which contributes to formation of the convex part of the uneven shape (A) of the anti-glare layer surface. By selecting such internal particles, the desired surface asperity shape of the present invention can be formed.

It is preferable that the said internal particle also has a refractive index difference with the hardened | cured material of the said binder resin which exists around the said internal particle is 0.01 or more. If it is less than 0.01, there exists a possibility that internal scattering property may not fully be exhibited with respect to the light which permeate | transmits from external light and a transparent base material side.

As for the said refractive index difference, it is more preferable that it is 0.02-0.15.

In addition, the refractive index difference of the hardened | cured material of the said binder resin and internal particle | grains can be calculated | required as follows using the transmission type phase shift laser microscopy interference measuring apparatus PLM-OPT made from NTT Advanced Technologies, for example.

That is, the optical laminated body of this invention is cut out to moderate size, and the said anti-glare layer is peeled from a base material by immersing in chloroform for about 1 day, and it dries. This is placed on the slide glass, immersed in an oil (for example, Cargill standard refractive solution manufactured by Morristech) having the same refractive index (about 1.52) as the cured product of the binder resin, and the cover glass is placed thereon. By doing in this way, the factor which generate | occur | produces phase difference other than internal particle can be eliminated by optically flattening the surface asperity of the hardened | cured material of binder resin with respect to the thickness direction of the said glare-proof layer. The sample obtained in this way was measured with the said transmission type phase shift laser microscopic interference measurement apparatus (measurement condition: 633 nm of measurement wavelengths, 200 times of measurement magnifications), making the incident direction of light into the thickness direction of a sample, and the inside of the hardened | cured material of a binder resin, and the inside By measuring the phase difference of the part in which a particle exists, and measuring the particle diameter of an internal particle with an optical microscope, the refractive index difference of the hardened | cured material of binder resin and internal particle can be calculated | required from the following formula.

Δn = Δφ? Λ / (2π? D)

(Δn: difference in refractive index between the binder and the internal particles

Δφ: phase difference between only the binder and the part with internal particles

λ: measurement wavelength

d: particle diameter of internal particles)

Although it will not specifically limit, if it is a thing satisfying the relationship of affinity with resin mentioned above and refractive index as said internal particle, It is preferable that it is a metal oxide or organic resin beads, and it is more preferable that it is organic resin beads. Moreover, it is preferable that the said internal particle is surface-treated in order to improve affinity with respect to resin.

As the metal oxide, silica is preferable. The silica is not particularly limited and may be any of crystalline, sol and gel states, and may be in an amorphous or spherical shape.

As a commercial item of the said silica, a wet synthetic amorphous silica (Sirisia (brand name), the product made by Fuji Siricia Kagaku Co., Ltd.), fumed silica (Aerosil (brand name), the product made by Degussa Co., Ltd.), colloidal silica (MEK-ST (brand name)) And Nissan Chemical Industries, Ltd.).

The said metal oxide may be surface-treated in order to adjust affinity with respect to resin.

Examples of the organic resin beads include acrylic beads (refractive index 1.49 to 1.53), polyethylene beads (refractive index 1.50), polystyrene beads (refractive index 1.60), styrene-acrylic copolymer beads (refractive index 1.54 to 1.56), polycarbonate beads (refractive index 1.57) ), Polyvinyl chloride beads (refractive index 1.60), melamine beads (refractive index 1.57), benzoguanamine-formaldehyde condensate beads (refractive index 1.66), melamine-formaldehyde condensate beads (refractive index 1.66), benzoguanamine-melamine- It is preferable that it is at least 1 sort (s) chosen from the group which consists of formaldehyde condensate beads (refractive index 1.66) and benzoguanamine-melamine condensate beads (refractive index 1.66). These may be used independently and may use 2 or more types together. Moreover, you may use together the said metal oxide and the said organic resin beads.

The organic resin beads may be subjected to surface treatment in order to adjust the affinity for the resin.

As for the said internal particle, it is preferable that the absolute value of the zeta potential in isopropanol is 20 mV or more. Dispersibility in isopropanol is good when it is 20 mV or more, and when alcohols, such as isopropanol, are used as a solvent of the composition for anti-glare layers mentioned later, affinity with respect to the binder resin used as a sea component becomes good. Therefore, since the uneven | corrugated shape (B) formed by internal particle | grains is formed in the sea part of the sea-island structure by the uneven | corrugated shape (A), it is preferable. If it is less than 20 mV, the affinity with the binder resin which becomes a sea component is bad, and internal particle | grains collect in the island part of the island-in-water structure by uneven | corrugated shape (A), and the surface uneven | corrugated shape of an anti-glare layer becomes large too much, and there exists a possibility that a glare may deteriorate. There is. As for the absolute value of the said zeta potential, it is more preferable that it is 30 mV or more.

The zeta potential is a value obtained by measuring with a Zeta potentiometer manufactured by Otsuka Denshi Co., Ltd.

It is preferable that the average particle diameter of the said internal particle is 1-100% in size with respect to the film thickness of the said glare-proof layer. If it is less than 1%, there exists a possibility that anti-glare effect may fall. When it exceeds 100%, the control of the uneven shape becomes impossible, and there is a fear that the anti-glare property is lowered. As for the said average particle diameter, it is more preferable that it is the magnitude | size of 10 to 70% with respect to the film thickness of the said glare-proof layer.

In addition, the said average particle diameter is a number average value obtained by measuring the size of each individual dispersion | distribution and / or aggregated particle in an area of 1 mm <2> in an optical micrograph.

It is preferable that content in the anti-glare layer of the said internal particle is 1-20 mass parts with respect to 100 mass parts of solid content of the resin component which contributes to formation of the uneven | corrugated recessed part of the said anti-glare layer surface. If it is less than 1 mass part, there exists a possibility that anti-glare effect may not be fully acquired. When it exceeds 20 mass parts, there exists a possibility that it may adversely affect an optical characteristic.

As for the said content, it is more preferable that it is 2-15 mass parts.

In addition to the above-mentioned components, the said anti-glare layer may contain another additive as needed to the extent which does not impair the effect of this invention.

As said additive, a polymer, a thermal polymerization monomer, a thermal polymerization initiator, a ultraviolet absorber, a photoinitiator, a light stabilizer, a leveling agent, a crosslinking agent, a hardening | curing agent, a polymerization promoter, a viscosity modifier, an antistatic agent, antioxidant, an antifouling agent, a slip agent, Refractive index regulators, dispersants and the like. These can use a well-known thing.

The said anti-glare layer can be formed using the composition for anti-glare layers obtained by mixing and disperse | distributing the said 2 or more types of binder resin, internal particle | grains, and the said additive with a solvent as needed.

What is necessary is just to select suitably as said solvent according to the kind and solubility of binder resin, For example, methanol, ethanol, isopropanol, butanol, isobutanol, methylglycol, methylglycol acetate, methylcellosolve, ethyl cellosolve, butyl cell Alcohols such as rosolve; Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone and diacetone alcohol; Esters such as methyl formate, methyl acetate, ethyl acetate, ethyl lactate, and butyl acetate; Nitrogen-containing compounds such as nitromethane, N-methylpyrrolidone and N, N-dimethylformamide; Ethers such as diisopropyl ether, tetrahydrofuran, dioxane and dioxolane, halogenated hydrocarbons such as methylene chloride, chloroform, trichloroethane and tetrachloroethane; Toluene, dimethyl sulfoxide, propylene carbonate and the like; Or a mixture of two or more thereof. Especially, as a preferable solvent, at least 1 sort (s) of cyclohexanone, methyl acetate, ethyl acetate, butyl acetate, methyl ethyl ketone, methyl isobutyl ketone, isopropanol, and isobutanol is mentioned.

What is necessary is just to be able to mix each component uniformly, and to manufacture the said anti-glare layer composition, what is necessary is just to mix using well-known apparatuses, such as a paint shaker, a bead mill, a kneader.

The said anti-glare layer is formed by apply | coating the said anti-glare layer on the said light transmissive base material, for example, forming a coating film, drying as needed, and then hardening | curing the coating film by heating or irradiating an ultraviolet-ray.

As the method for forming the coating film, spin coating, dipping, spraying, die coating, bar coating, roll coater, meniscus coater, flexo printing, screen printing, bead coater, etc. Various known methods are mentioned.

Although it does not specifically limit as a method of drying the said coating film, A well-known method can be applied, However, It is preferable to dry at 30-120 degreeC for 0.1 to 5 minutes.

It does not specifically limit as a method of irradiating an ultraviolet-ray to the said coating film, It is good to carry out by a well-known method using a general ultraviolet light source.

Specific examples of the ultraviolet source include light sources such as ultra high pressure mercury lamps, high pressure mercury lamps, low pressure mercury lamps, carbon arc lamps, black light fluorescent lamps, and metal halide lamps. As the wavelength of ultraviolet rays, a wavelength range of 190 to 380 nm can be used. Specific examples of the electron beam source include various types of electron beam accelerators such as a Cocross Walton type, a Bandegraft type, a resonant transformer type, an insulating core transformer type, or a linear type, a dinamic type, and a high frequency type.

It is preferable to perform irradiation of the said ultraviolet-ray, removing oxygen.

It does not specifically limit as a method of heating and hardening the said coating film, According to the kind of binder resin to be used, it can select suitably and can carry out by a well-known method.

Although the film thickness of the said anti-glare layer can be suitably set according to desired specific etc., it is preferable that it is generally 0.5-50 micrometers, and it is more preferable that it is 2-20 micrometers.

The film thickness is a value obtained by observing a cross section with an electron microscope (SEM, TEM, STEM).

The said optical laminated body may have arbitrary layers other than the above-mentioned transparent base material and anti-glare layer. As said arbitrary layer, an antistatic layer, a low refractive index layer, a contamination prevention layer, a high refractive index layer, a medium refractive index layer, a hard-coat layer, etc. are mentioned. These can be formed by a well-known method by mixing a well-known antistatic agent, a low refractive index agent, a high refractive index agent, an antifouling agent, etc. with resin, a solvent, etc.

In the pencil hardness test (load 4.9 N) according to JIS K5600-5-4 (1999), the optical laminated body of the present invention preferably has a hardness of H or more, more preferably 2H or more, and even more preferably 3H or more. desirable.

It is preferable that the optical laminated body of this invention is 80% or more in total light transmittance. If it is less than 80%, when mounted on the display surface, there exists a possibility that a color reproducibility or visibility may be impaired. As for the said total light transmittance, it is more preferable that it is 85% or more, and it is still more preferable that it is 90% or more.

The said total light transmittance can be measured by the method based on JISK-7361 using the haze meter (Murakami Color Technology Research Institute make, product number; HM-150).

It is preferable that the optical laminated body of this invention is 0.1 to 10% of surface haze. If it is less than 0.1%, anti-glare property may become inadequate, and when it exceeds 10%, there exists a possibility that color reproducibility, such as a fall of contrast, may fall. As for the said surface haze, it is more preferable that it is 0.1 to 5%, and it is still more preferable that it is 0.1 to 3%.

It is preferable that the internal haze of the optical laminated body of this invention is 1 to 20%. If it is less than 1%, the glare may deteriorate. When it exceeds 20%, there is a fear that the contrast under the dark room is lowered. As for the said internal haze, it is more preferable that it is 2 to 10%.

The said surface haze and internal haze can be calculated | required as follows. That is, on the uneven surface of the outermost surface of the optical laminated body, a resin layer such as pentaerythritol triacrylate (containing a resin component such as a monomer or oligomer) was diluted with toluene or the like to obtain a solid content of 60%. The coating is applied so that the thickness is 8 m. As a result, the surface irregularities of the antiglare layer are broken down to form a flat layer. However, when the recoating agent is easy to repel and is hard to get wet because the leveling agent etc. are contained in the composition which forms an optical laminated body, the optical laminated body is previously saponified (2 mol / l NaOH (or KOH) solution, 55). After immersing for 3 minutes in 3 degreeC, it washes with water and removes a water droplet completely by Kim wipe, and then, it may perform a hydrophilic treatment by drying in a 50 degreeC oven for 1 minute).

The optical laminated body which leveled the surface does not have haze by surface unevenness, but is in the state which has only internal haze. This haze can be obtained as internal haze. And the value which subtracted internal haze from the haze (all the haze) of the original optical laminated body is calculated | required as haze (surface haze) originating only in surface asperity.

In addition, a haze value can be measured according to JISK-7136. As an apparatus used for a measurement, the reflection-transmittance meter HM-150 (made by Murakami Color Technology Research Institute) is mentioned. The haze is measured with the application surface facing the light source.

As a method of manufacturing the optical laminated body of this invention, the method of apply | coating the composition for anti-glare layers on a transparent base material, forming a coating film, and hardening the said coating film is mentioned the method of forming an anti-glare layer.

The composition for an antiglare layer contains two or more kinds of binder resins and internal particles which are incompatible with each other. The method of manufacturing such an optical laminated body is also one of this invention.

As said light-transmissive base material and anti-glare layer composition, the thing similar to what was mentioned above is mentioned. As a method of apply | coating the said anti-glare layer composition to form a coating film, and the method of hardening the said coating film and forming an anti-glare layer, the method similar to the method of forming an anti-glare layer mentioned above is mentioned.

The optical laminated body of this invention can be made into a polarizing plate by providing the surface side of the said optical laminated body on the opposite side to the surface in which the anti-glare layer of a light transmissive base material exists on the surface of a polarizing element.

It does not specifically limit as said polarizing element, For example, the polyvinyl alcohol film, the polyvinyl formal film, the polyvinyl acetal film, the ethylene-vinyl acetate copolymer type saponification film etc. which were dyed with iodine etc. and extended | stretched can be used. In the lamination process of the said polarizing element and the said optical laminated body, it is preferable to perform a saponification process to a light transmissive base material. By saponification process, adhesiveness becomes favorable and an antistatic effect can also be obtained. Moreover, you may adhere | attach using an adhesive. As said adhesive, an acrylic adhesive, a urethane type adhesive, a silicone type adhesive, or an aqueous adhesive etc. are mentioned, for example.

The optical laminated body of this invention and the said polarizing plate can be provided in the outermost surface of an image display apparatus.

The image display device may be a non-luminous image display device such as an LCD, or may be a self-luminous image display device such as a PDP, a FED, an ELD (organic EL, an inorganic EL), or a CRT.

An LCD, which is a representative example of the non-light emitting type, includes a transmissive display and a light source device for irradiating the transmissive display from the back side. When the image display apparatus of this invention is LCD, the said optical laminated body or the said polarizing plate is formed in the surface of this transmissive display body.

In the case of the liquid crystal display device which has the optical laminated body of this invention, the light source of a light source device is irradiated from the light transmissive base material side of an optical laminated body. In the STN type liquid crystal display device, a retardation plate may be inserted between the liquid crystal display element and the polarizing plate. An adhesive layer may be formed between each layer of the liquid crystal display device, if necessary.

The PDP, which is the self-luminous image display device, has a back glass substrate (electrode and a small groove disposed on the surface thereof in which a discharge gas is sealed between the surface glass substrate (the electrode is formed on the surface) and the surface glass substrate). And a red, green, and blue phosphor layer is formed in the groove. When the image display apparatus of this invention is PDP, it may provide the above-mentioned optical laminated body in the surface of the said surface glass substrate, or its front plate (glass substrate or film substrate).

The self-luminous image display device is a zinc sulfide which emits light when a voltage is applied, a diamine material: an ELD device which deposits a light emitting body on a glass substrate and controls the voltage applied to the substrate to display the light, or an electric signal. It may be an image display device such as a CRT that converts the image into a human eye and generates an image visible to the human eye. In this case, the above-described optical laminate is provided on the outermost surface of each display device as described above or on the surface of the front face plate.

The optical laminated body of this invention can be used for display indication of a television, a computer, a word processor, etc. in any case. In particular, it can apply suitably to the surface of high definition image displays, such as CRT, a liquid crystal panel, PDP, ELD, and FED.

Since the optical laminated body of this invention consists of the said structure, it can prevent suitably projection of an outer diameter, glare, generation | occurrence | production of moire, and a fall of contrast. For this reason, the optical laminated body of this invention is suitable for a cathode ray tube display apparatus (CRT), a liquid crystal display (LCD), a plasma display (PDP), an electro luminescence display (ELD), a field emission display (FED), etc. suitably. Applicable

BRIEF DESCRIPTION OF THE DRAWINGS It is an optical microscope photograph by the reflection observation of the surface of the optical laminated body of Example 1. FIG.
2 is an optical micrograph by observation of reflection of the surface of the optical laminate of Comparative Example 1. FIG.
3 is an optical micrograph by observation of the reflection of the surface of the optical laminate of Comparative Example 2. FIG.
4 is an optical micrograph by observation of reflection of the surface of the optical laminate of Comparative Example 3. FIG.
It is an optical microscope photograph by observation of the reflection of the surface uneven | corrugated shape in the same location as FIG. 6 of the optical laminated body of Example 1. FIG.
It is an optical microscope photograph by the transmission observation of the surface asperity shape of the same location as FIG. 5 of the optical laminated body of Example 1. FIG.

Although an Example and a comparative example are given to the following and this invention is demonstrated in more detail, this invention is not limited only to these Examples and a comparative example.

In addition, it is a mass reference | standard unless there is particular notice that it is a part or% among description.

Example  One

5 parts of monodisperse hydroxyl-containing styrene-acrylic particles (particle size 2.5 μm, refractive index n = 1.56)

3 parts oligomer containing isobornyl methacrylate

Pentaerythritol triacrylate 70 parts

Dipentaerythritol hexaacrylate 30parts

Irgacure 184 (product of Shiba Japan)

Isopropanol 120 parts

50 parts of methyl isobutyl ketone (MIBK)

The composition was prepared by properly adding the material and mixing it sufficiently. This obtained composition was filtered with the polypropylene acid filter of 30 micrometers of pore diameters, and the coating liquid was obtained. The coating solution was applied onto a triacetylcellulose base film (manufactured by TD80U Fuji Film Co., Ltd.) having a thickness of 80 µm with a Mayer bar so as to have a dry film thickness of 4 µm, and irradiation dose of ultraviolet rays under nitrogen purge (oxygen concentration of 200 ppm or less). It irradiated so that it might become 100mj, the coating film was hardened | cured, the anti-glare layer was formed, and the optical laminated body was obtained.

Example  2

5 parts of monodisperse hydroxyl-containing styrene-acrylic particles (particle size 2.5 μm, refractive index n = 1.56)

6 parts oligomer containing isobornyl methacrylate

Pentaerythritol triacrylate 70 parts

Dipentaerythritol hexaacrylate 30parts

Irgacure 184 (product of Shiba Japan)

Isopropanol 120 parts

50 parts of methyl isobutyl ketone (MIBK)

The composition was prepared by properly adding the material and mixing it sufficiently. This obtained composition was filtered with the polypropylene acid filter of 30 micrometers of pore diameters, and the coating liquid was obtained. The coating solution was applied onto a triacetylcellulose base film (manufactured by TD80U Fuji Film Co., Ltd.) having a thickness of 80 µm with a Mayer bar so as to have a dry film thickness of 4 µm, and irradiation dose of ultraviolet rays under nitrogen purge (oxygen concentration of 200 ppm or less). It irradiated so that it might become 100mj, the coating film was hardened | cured, the anti-glare layer was formed, and the optical laminated body was obtained.

Comparative example  One

Monodisperse Styrene-Acrylic Particles (particle size 2.5 μm, Refractive Index n = 1.56)

100 parts of pentaerythritol triacrylate

10 parts of polymethyl methacrylate (molecular weight 75000)

Irgacure 184 (product of Shiba Japan)

0.1 part of silicon leveling agent

Toluene 120 parts

50 parts cyclohexanone

The composition was prepared by properly adding the material and mixing it sufficiently. This composition was filtered with the polypropylene acid filter of 30 micrometers of pore diameters, and the coating liquid was obtained. The coating solution was applied onto a triacetylcellulose base film (manufactured by TD80U Fuji Film Co., Ltd.) having a thickness of 80 µm with a Mayer bar so as to have a dry film thickness of 4 µm, and irradiation dose of ultraviolet rays under nitrogen purge (oxygen concentration of 200 ppm or less). It irradiated so that it might become 100mj, the coating film was hardened | cured, the anti-glare layer was formed, and the optical laminated body was obtained.

Comparative example  2

4 parts oligomer containing isobornyl methacrylate

Pentaerythritol triacrylate 70 parts

Dipentaerythritol hexaacrylate 30parts

Irgacure 184 (product of Shiba Japan)

Isopropanol 120 parts

MIBK 50

The composition was prepared by properly adding the material and mixing it sufficiently. This composition was filtered with the polypropylene acid filter of 30 micrometers of pore diameters, and the coating liquid was obtained. The coating solution was applied onto a triacetylcellulose base film (manufactured by TD80U Fuji Film Co., Ltd.) having a thickness of 80 µm with a Mayer bar so as to have a dry film thickness of 4 µm, and irradiation dose of ultraviolet rays under nitrogen purge (oxygen concentration of 200 ppm or less). It irradiated so that it might become 100mj, the coating film was hardened | cured, the anti-glare layer was formed, and the optical laminated body was obtained.

Comparative example  3

5 parts of monodisperse styrene-acryl particle (without hydroxyl group) (particle size 2.5 micrometers, refractive index n = 1.56)

3 parts oligomer containing isobornyl methacrylate

Pentaerythritol triacrylate 70 parts

Dipentaerythritol hexaacrylate 30parts

Irgacure 184 (product of Shiba Japan)

Isopropanol 120 parts

MIBK 50

The composition was prepared by properly adding the material and mixing it sufficiently. This composition was filtered with the polypropylene acid filter of 30 micrometers of pore diameters, and the coating liquid was obtained. The coating solution was applied onto a triacetyl cellulose film (manufactured by TD80U Fuji Film Co., Ltd.) having a thickness of 80 µm with a Mayer bar so that the dry film thickness was 4 µm, and the irradiation dose was irradiated with ultraviolet rays under nitrogen purge (oxygen concentration of 200 ppm or less). It irradiated so that it might become 100mj, the coating film was hardened | cured, the anti-glare layer was formed, and the optical laminated body was obtained.

Each obtained optical laminated body was evaluated in the following items. The results are shown in Table 1.

Moreover, the optical micrograph by the reflection observation of the surface of the optical laminated body of Example 1 and Comparative Examples 1-3 was shown in FIGS. In addition, about the optical laminated body of Example 1, the optical micrograph by the reflection observation of the same location and the optical micrograph by transmission observation were shown to FIG. 5, FIG. 6, respectively. In the reflection observation of FIG. 5, all surface irregularities can be observed. Meanwhile, in the transmission observation of FIG. 6, only internal particles (shown as black origins in FIG. 6) can be observed.

As apparent from the comparison between FIG. 5 and FIG. 6, in the optical laminate of Example 1, unevenness (that is, uneven shape (A) formed by phase separation) is observed at a location where internal particles do not exist. Many particles exist in the sea portion of the island-in-sea structure of phase separation, and the unevenness | corrugation (namely, uneven | corrugated shape (B)) was formed.

In addition, although the optical laminated body of Example 2 was not shown in figure, it was similar to the optical laminated body of Example 1.

As for the anti-glare layer of the optical laminated body of the comparative example 1, the uneven | corrugated shape (A) by phase separation was not formed, but the uneven | corrugated shape (B) by internal particle was formed.

As for the anti-glare layer of the optical laminated body of the comparative example 2, the uneven shape (A) by phase separation was formed.

As for the anti-glare layer of the optical laminated body of the comparative example 3, the uneven | corrugated shape was formed by the internal particle which exists in many convex parts (FIG. Part) of the uneven | corrugated shape (A) by phase separation.

surface Hayes , inside Hayes , Rz , Rz Of Ra , Rku

Surface haze and internal haze were measured by the method mentioned above.

The kurtosis (Rku) of the roughness curve, the ten-point average roughness (Rz), the ratio (Rz / Ra) of the ten-point average roughness (Rz) and the arithmetic mean roughness (Ra) are three-dimensional surface shape roughness measuring instruments (manufactured by Zhigo Corporation). It measured on the following measurement conditions using "New View 5000".

Measurement conditions: The 555 micrometer square of visual field was measured by 10 times of an objective lens, and 2 times of a zoom lens, and cylindrical surface correction was performed in order to correct the whole shape (bending). In addition, in order to remove the influence which noise has on a roughness parameter, the spike removal process (removed when it is higher than twice the RMS (square root mean square) calculated from the surrounding 3x3 point in each point) was performed.

Polish Black  Measurement method

Sensory evaluation (antiglare of optical laminated body) under the 30-wavelength fluorescence (irradiation from the 45 degree direction to anti-glare layer surface) after 30-wavelength fluorescence of the anti-glare layer surface of the obtained each optical laminated body opposite to the polarizing plate of cross nicol. Visual observation was performed from an angle of about 45 ° above 50 cm from the layer surface, and black reproducibility (whether black appeared black) was evaluated in detail by the following criteria. In that case, black comparison was performed using the cross nicol polarizing plate as a black reference sample.

Evaluation standard

Evaluation ◎: Black could be reproduced.

Evaluation ○: Although there was some milky white feeling, black could be almost reproduced without minding.

Evaluation X: There was a milky white feeling, and black was not able to be reproduced.

Flashing evaluation method

On the HAKUBA Viewer (Light Viewer 7000PRO), the black matrix pattern plates (140 ppi, 100 ppi) formed in 0.7 mm thick glass were placed face down, and the optical laminated body obtained thereon was an anti-glare layer surface. Was set to the air side, the light was visually observed in the dark room while lightly pressing the edge of the optical laminate with a finger so that the optical laminate did not float, and the following criteria were evaluated.

Evaluation standard

Evaluation: No flash was recognized at 140 ppi.

Evaluation ○: The flash was not recognized at 105 ppi, but was recognized at 140 ppi.

Evaluation ×: Flash was recognized at 105 ppi.

Moire Assessment Methods

On a viewer made of Hakuba (Light Viewer 7000PRO), a black matrix pattern plate (105 ppi) formed on 0.7 mm thick glass was placed face down, and the optical laminate obtained thereon was placed with the uneven surface in the air side. Moire was visually observed in the dark room while pressing the edge of the optical laminated body lightly with a finger so that the optical laminated body might not float, and the following reference | standard evaluated.

Evaluation standard

Evaluation (double-circle): Moire was not recognized and luminance uniformity nonuniformity was not detected.

Evaluation ○: Moire was not recognized, and luminance uniformity nonuniformity was slightly detected, but it was not worried.

Evaluation ×: Moire was recognized.

In Table 1, in Example 1 and Example 2, uneven | corrugated shape is formed by phase separation and internal particle | grains, and since many internal particles exist in the recessed part (sea component) of the uneven | corrugated shape (A) by phase separation, Good characteristics were shown. In addition, in Example 2, since Rz is slightly large, gloss blackness, moire, and glitter are good, but are slightly inferior to Example 1.

In the comparative example 1, since only the uneven | corrugated shape (B) by particle | grains was formed in the surface of an anti-glare layer, Rz / Ra and Rku became large and the gloss blackness was damaged. In the comparative example 2, since uneven | corrugated shape (A) was formed in the surface of an anti-glare layer only by phase separation, uneven | corrugated shape became a regular pattern and moire occurred. In Comparative Example 3, the concave-convex shape was formed by the phase separation and the internal particles as in Example 1, but since the affinity of the binder resin constituting the internal particles and the sea component was low, the internal particles had the concave-convex shape due to phase separation (A Gathered in the convex part (island part) of a), the aggregated mass became large, Rz became large, and the glitter was damaged.

Industrial Applicability

The optical laminated body of this invention can be suitably applied to a cathode ray tube display apparatus (CRT), a liquid crystal display (LCD), a plasma display (PDP), an electro luminescence display (ELD), a field emission display (FED), etc. have.

Claims (6)

It is an optical laminated body which has at least an anti-glare layer on a transparent base material,
The anti-glare layer has a concave-convex shape on the surface opposite to the light-transmissive substrate,
The uneven shape is composed of an uneven shape (A) formed by phase separation of the binder resin constituting the antiglare layer and an uneven shape (B) formed by internal particles included in the antiglare layer,
The concave-convex shape (A) constitutes an island-in-the-sea structure in which the convex portion is an island portion and the concave portion is an ocean portion.
The said internal particle exists in the sea part of the said island-in-law structure many in the said glare-proof layer, The optical laminated body characterized by the above-mentioned. It is an optical laminated body which has at least an anti-glare layer on a transparent base material,
The anti-glare layer has a concave-convex shape on the surface opposite to the light-transmissive substrate,
The uneven shape is composed of an uneven shape (A) formed by phase separation of the binder resin constituting the antiglare layer and an uneven shape (B) formed by internal particles included in the antiglare layer,
10-point average roughness Rz is less than 3 micrometers, The optical laminated body characterized by the above-mentioned. The uneven | corrugated shape of the surface of an antiglare layer is an optical laminated body of Claim 2 whose ratio (Rz / Ra) of 10-point average roughness Rz and arithmetic mean roughness Ra is less than 12. The optical laminated body of Claim 2 or 3 whose unevenness | corrugation shape of the anti-glare layer surface is a kurtosis (Rku) of a roughness curve of 4 or less. The internal particle has affinity with respect to the resin component which contributes to formation of a recessed part rather than the resin component which contributes to formation of the convex part of the uneven shape (A) of the surface of an antiglare layer. High, optical laminate. It is a manufacturing method of the optical laminated body which has at least an anti-glare layer on a transparent base material,
A step of forming a coating film by applying a composition for an antiglare layer comprising two or more kinds of binder resins and internal particles which are incompatible with each other on the light-transmitting substrate, and
It has a process of hardening the said coating film and forming an anti-glare layer, The manufacturing method of the optical laminated body characterized by the above-mentioned.

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