JPH0618706A - Scratching resistant antidazzle film, polarizing plate and its production - Google Patents

Abstract

PURPOSE:To provide the scratching resistant antidazzle film which has an excellent antidazzle property, yet excellent resolution and contrast, has good surface hardness and solvent resistance and can prevent whitening and the polarizing plate formed by using this film and the process for production thereof. CONSTITUTION:An antidazzle layer 2 is formed on a transparent substrate 1 by coating the substrate with a coating material compsn. essentially constituted of resin beads 3 having 1.40 to 1.60 refractive index and an ionization radiation curing type resin compsn. and irradiating the coating with ionization radiations to cure the ionization radiation curing type resin compsn. The scratching resistant antidazzle film which is not high in Haze value is obtd. even if the film is subjected to a saponification treatment when the transparent substrate 1 is an acetyl cellulosic film. The coating film obtd. in the case of the of polyester acrylate and polyurethane acrylate as the ionization radiation curing type resin is excellent in terms of hardness and impact resistance. The antidazzle film and transparent substrate may be further provided with an antistatic layer 4 and a moistureproof layer. The polarizing plate is obtd. by laminating this film on a polarizing element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scratch-resistant antiglare film, a polarizing plate, and a method for producing the same, which are used for various displays such as word processors, computers and televisions, and particularly for liquid crystal displays.

[0002]

2. Description of the Related Art In various displays such as word processors, computers and televisions, visual information such as characters and figures can be observed through a transparent protective substrate such as glass or plastic on the surface thereof. Usually, these displays emit light from the inside of the main body, and in particular, the liquid crystal display uses a backlight to improve the visibility.

In these displays, when the light mainly emitted from the inside passes through the display surface as it is without being diffused, it is dazzling when the surface is visually observed. The display surface was subjected to an antiglare treatment so as to be diffused by. Such an antiglare treatment is conventionally performed by coating a resin containing a filler such as silicon dioxide on the display surface or coating a resin containing a filler such as silicon dioxide on a transparent substrate. The substrate was attached to the display surface.

In particular, a film-shaped polarizing element which functions as a light shutter is provided on the surface of a display body such as a liquid crystal display. However, since the polarizing element itself is inferior in scratch resistance, it is made of glass or transparent. A polarizing plate is formed by being protected by a transparent protective substrate such as a plastic plate or a transparent plastic film. However, since the transparent protective substrate itself made of a plastic such as a transparent plastic plate or a transparent plastic film is also easily scratched, in recent years, such a polarizing plate having a scratch-resistant surface has been developed. As such a technique, for example, there is one described in Japanese Patent Application Laid-Open No. 1-105738.

This publication discloses a transparent protective substrate provided with a scratch resistance and an antiglare property, that is, a triacetate film for light control, which is laminated on a polarizing element in the form of a film to form a polarizing plate. Has been done. This film is a triacetate film having excellent scratch resistance by providing a cured coating film made of an ultraviolet curable epoxy acrylate resin on one surface of an unsaponified triacetate film.

In order to further impart antiglare property to the triacetate film having excellent scratch resistance, a resin composition obtained by adding amorphous silica to the UV-curable epoxy acrylate resin is conventionally used on the surface of the triacetate film. It is applied and cured. When the thus obtained triacetate film is attached to a polarizing element to form a polarizing plate, saponification treatment with an alkali is performed to improve adhesiveness with the polarizing element and to prevent static electricity, and then, ,
A polarizing plate is manufactured by bonding it to a polarizing element.

On the other hand, in order to eliminate the trouble caused by static electricity generated on the surface of a liquid crystal display or the like, an antistatic paint is applied to the surface of the liquid crystal display or the like. As the antistatic agent, an antistatic agent containing a conductive filler such as carbon black or an ion complex type surfactant is used for the antistatic agent. The antistatic layer containing an ion complex type surfactant has a drawback that the resistance value is easily affected by the environment and the durability is not good.

In order to obtain a film capable of simultaneously improving the above-mentioned two properties of antistatic property and antiglare property, it has been attempted to coat a transparent substrate with a paint containing a mixture of an inorganic filler and a conductive filler. . Similarly, in order to obtain an antiglare film having antistatic properties, a conductive coating material containing a conductive filler is applied to the lower layer and completely cured to form an antistatic layer, and an antiglare layer is formed thereon. Attempting to form.

[0009]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In the conventional antiglare film provided with a coating film made of a resin composition containing amorphous silica on the surface of a transparent substrate, when a triacetate film is used for the transparent substrate, By the alkali treatment of, the value showing the haze value (the haze value is a value expressed by diffuse transmittance / total light transmittance) becomes large, and a film having low resolution, contrast and transparency is obtained,
It had poor alkali resistance.

For example, in order to impart the antiglare property, silica is blended in an amount of about 2 parts by weight with respect to 100 parts by weight of the resin, but a coating film containing silica in such a blending ratio is transparent. It had the drawback of falling. Not only that,
In the case of using a triacetate film for the transparent substrate, when the saponification treatment by alkali dipping is performed for the purpose of improving the adhesiveness and preventing the above-described coating containing silica, a value indicating the haze value of the obtained triacetate film is obtained. It became a large film with poor resolution, contrast and transparency. It is considered that this is because the interface between the resin composition and the inorganic filler is attacked by alkali.

Further, for example, in the above-mentioned conventional antiglare film which imparts antistatic property to the surface of a liquid crystal display or the like and at the same time has an antiglare property, the conductive filler is contained because the amount of the conductive filler added is considerably large. The coating film is attacked by alkali due to saponification, the coating film is detached, and moreover, the conductive filler is mostly exposed on the surface of the coating film, and the conductive filler cannot be fixed with the binder and the surface peels off. There was a problem in scratch resistance such as causing scratches. Further, there is a problem that it is difficult to adjust the optical properties because the conductive filler is blended.

When a triacetate film is used as the transparent substrate, a coating film having excellent scratch resistance is provided for the purpose of protecting the triacetate film. In order to improve the adhesion of this coating film, conventionally, the surface of the triacetate film was dissolved by using a solvent such as ethyl acetate methyl ethyl ketone, but with such a method, the whitening of the triacetate film was caused and the transparency was improved. It had the drawback of damaging it.

The above-mentioned conventional antiglare film having an antistatic layer and an antiglare layer formed thereon is a coating which further imparts antiglare properties on the antistatic layer formed by curing the antistatic coating. Since the antiglare layer is formed by applying and curing the above, there is a problem that the adhesion between these two layers is poor and delamination easily occurs. Further, the polarizing element has a drawback that the function as the polarizing element is deteriorated by moisture.
A polarizing plate formed by laminating a conventional antiglare film on a polarizing element cannot sufficiently prevent the transmission of moisture, and thus has a disadvantage that the polarizing function is deteriorated.

Further, the conventional antiglare film has a drawback that static electricity is easily generated. For example, a polarizing plate produced by laminating an antiglare film on a polarizing element is usually stored with a protective film attached to its surface before use, but the protective film is peeled off at the time of use. Then, there is a disadvantage that dust easily adheres due to static electricity. In addition, when the polarizing plate having the antiglare film attached thereto is incorporated into a liquid crystal display, there is a problem that it is disturbed by external static electricity.

In order to solve the above-mentioned problems, the first object of the present invention is not only excellent in antiglare property but also excellent in transparency, and further excellent in resolution, contrast, surface hardness and solvent resistance. An object of the present invention is to provide a scratch-resistant antiglare film which is good and can prevent whitening, a polarizing plate using the scratch-resistant antiglare film, and a method for producing the scratch-resistant antiglare film.

Further, an object associated with the first object of the present invention is to use a acetyl cellulose film as a transparent substrate, and to provide a coating film excellent in scratch resistance for the purpose of protecting the acetyl cellulose film. When provided, the haze value, the contrast and the transparency are not deteriorated even when saponified with an alkaline aqueous solution, whitening can be prevented, and the adhesion between the transparent substrate and the coating film having excellent scratch resistance is excellent. It is intended to provide a scratch-resistant antiglare film, a polarizing plate using the scratch-resistant antiglare film, and a method for producing the scratch-resistant antiglare film.

Further, an object associated with the first object of the present invention is to provide a scratch-resistant anti-glare film and a scratch-resistant anti-glare film which can prevent generation of static electricity and have good transparency at the same time. It is intended to provide a method for producing a polarizing plate and a scratch-resistant antiglare film used. A second object of the present invention is to prevent delamination between an antistatic layer and an antiglare layer in a scratch resistant antiglare film in which an antistatic layer and an antiglare layer having scratch resistance are formed on a transparent substrate. , And at the same time excellent in antiglare property, excellent in transparency, further excellent in resolution, contrast, surface hardness, solvent resistance, and scratch resistant antiglare film capable of preventing whitening, and scratch resistance thereof PROBLEM TO BE SOLVED: To provide a polarizing plate using a transparent antiglare film and a method for producing a scratch-resistant antiglare film.

A third object of the present invention is to use a scratch-resistant anti-glare film which is excellent in moisture-proofness and anti-glare property for a polarizing element and at the same time excellent in transparency, and the scratch-resistant anti-glare film. It is intended to provide a method for producing a polarizing plate and a scratch-resistant antiglare film.

[0019]

[Means for Solving the Problems]

I. Invention for achieving the first object The invention for achieving the above-mentioned first object is essentially composed of resin beads having a refractive index of 1.40 to 1.60 and an ionizing radiation curable resin composition on a transparent substrate. The scratch-resistant antiglare film is characterized in that the antiglare layer having the above structure is formed.

Further, in order to achieve the first object, the present invention provides a polarizing plate characterized in that the scratch-resistant antiglare film is laminated on a polarizing element. In order to achieve the first object, the present invention provides an antiglare coating which is essentially composed of resin beads having a refractive index of 1.40 to 1.60 and an ionizing radiation curable resin composition on a transparent substrate. And then coating the coating film of the uncured antiglare paint with ionizing radiation to cure the coating film of the paint. It is a thing.

FIG. 1 is a sectional view of a scratch-resistant antiglare film which achieves the first object of the present invention. In FIG. 1, 1 is a transparent substrate, 2 is an antiglare layer, and 3 is resin beads. The invention for achieving the first object will be described in more detail below. Transparent substrate: The transparent substrate used in the present invention includes a triacetyl cellulose film, a diacetyl cellulose film, an acetate butyrate cellulose film, a polyether sulfone film, a polyacrylic resin film, a polyurethane resin film, a polyester film, Polycarbonate film, polysulfone film, polyether film, trimethylpentene film, polyetherketone film, (meth) acrylonitrile film, etc. can be used, but especially triacetyl cellulose film and uniaxially stretched polyester film are excellent in transparency and optical. It is preferably used because it has no anisotropy.

The thickness may be plate-like or film-like, but normally a thickness of about 25 μm to 1000 μm is used. Ionizing radiation curable resin: The film-forming component used in the ionizing radiation curable resin composition of the present invention preferably has an acrylate-based functional group, for example, a polyester resin having a relatively low molecular weight, a polyether resin,
Acrylic resin, epoxy resin, urethane resin, alkyd resin, spiro acetal resin, polybutadiene resin,
Polythiol polyene resin, oligomer or prepolymer such as (meth) acrylate of polyfunctional compound such as polyhydric alcohol, and ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone as a reactive diluent. And monofunctional monomers such as trimethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth). Acrylate, dipentaerythritol hexa (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth)
Those containing a relatively large amount of acrylate or the like can be used.

Particularly preferably, a mixture of polyester acrylate and polyurethane acrylate is used. The reason is that polyester acrylate is suitable for obtaining a hard coat because the coating is very hard, but polyester acrylate alone has a low impact resistance and becomes brittle, so that the coating has impact resistance and flexibility. Polyurethane acrylate is used together to impart the property. The mixing ratio of polyurethane acrylate to 100 parts by weight of polyester acrylate is 30 parts by weight or less. This is because if the value exceeds this value, the coating film becomes too soft and loses its hardness.

Further, in order to make the above-mentioned ionizing radiation curable resin composition into an ultraviolet curable resin composition, acetophenones, benzophenones, Michler benzoylbenzoate, α-amyloxime are used as photopolymerization initiators therein. Ester, tetramethylthiuram monosulfide,
Thioxanthones and n-butylamine, triethylamine, tri-n-butylphosphine and the like can be mixed and used as a photosensitizer. Particularly in the present invention, it is preferable to mix urethane acrylate as the oligomer and dipentaerythritol hexaacrylate as the monomer.

As the ionizing radiation, electromagnetic waves such as ultraviolet rays and visible rays, and particle beams such as electron beams are used. Resin beads: Resin beads having a refractive index of 1.40 to 1.60 are mixed with the ionizing radiation curable resin composition in order to impart antiglare properties. The reason why the refractive index of the resin beads is limited to such a value is that the ionizing radiation curable resin, especially the acrylate or methacrylate resin has a refractive index of usually 1.40 to 1.50. Choosing resin beads with a refractive index as close as possible to that of the resin does not impair the transparency of the coating film, and
This is because the antiglare property can be increased. By the way, resin beads having a refractive index close to that of the ionizing radiation curable resin are shown in Table 1 below.

[0026]

[Table 1]

The particle size of these resin beads is 3 to 8 μm.
Is preferably used, and it is 2 per 100 parts by weight of the resin.
-10 parts by weight, usually about 4 parts by weight is used. When such resin beads are mixed in this paint, it is necessary to stir the resin beads precipitated at the bottom of the container to disperse well when using the paint. In order to eliminate such inconvenience, the above paint has a particle size of 0.5 μm as an anti-sedimentation agent for resin beads.
m or less, preferably 0.1 to 0.25 μm silica beads may be included. The more silica beads are added, the more effective is the prevention of sedimentation of the organic filler,
It adversely affects the transparency of the coating film. Therefore, the resin 10
With respect to 0 parts by weight, to the extent that the transparency of the coating film is not impaired,
In addition, it is preferably less than about 0.1 part by weight, which is a range capable of preventing sedimentation.

Antistatic agent: Further, in the antiglare coating for imparting antiglare properties to form a hard coat coating film used in the present invention, an antistatic agent is added for the purpose of preventing the coating film from being charged. May be added. As the antistatic agent, an inorganic filler such as a metal filler, tin oxide or indium oxide can be used. In particular, those having a particle diameter of not more than the wavelength of visible light become transparent after film formation and do not impair the transparency of the antiglare film, which is preferable.

The organic antistatic agents include, for example, quaternary ammonium salts, pyridinium salts, various cationic antistatic agents having cationic groups such as primary to tertiary amino groups, sulfonate groups, Anionic antistatic agents having anionic groups such as sulfuric acid ester bases, phosphoric acid ester bases, phosphonic acid bases, amphoteric antistatic agents such as amino acid bases, aminosulfuric acid ester bases, amino alcohol bases, glycerin bases, polyethylene glycol bases, etc. Examples include various surface active agent type antistatic agents such as nonionic antistatic agents, and further high molecular weight type antistatic agents obtained by polymerizing the above antistatic agents. Monomers or oligomers having a quaternary ammonium group and polymerizable by ionizing radiation, such as N, N-dialkylaminoalkyl (meth) acryle Tomonoma also polymerizable antistatic agents such as those quaternary compounds can be used.

By thus adding the antistatic agent to the antiglare paint, the antiglare film produced by applying the antiglare paint does not generate static electricity. Therefore, when the protective film is attached to the polarizing element and becomes a polarizing plate, static electricity is not generated when the protective film is peeled off, and dust is not attached. Also, when incorporated into a liquid crystal display or the like, there is no external electrostatic damage.

Leveling agent: Fluorine-based or silicone-based resin used for curing the ionizing radiation-curable resin for forming the anti-glare and scratch-resistant hard coat coating used in the present invention by irradiating it with ultraviolet rays. Addition of a leveling agent to the ionizing radiation curable resin is advantageous for curing. The reason for this is that when triacetylcellulose is used as the transparent substrate, the hardness of the obtained coating film surface is insufficient because the irradiation intensity of ultraviolet rays cannot be increased so much because it does not have heat resistance. In ionizing radiation curable resin with added agent, fluorine-based or silicone-based leveling agent bleeds to the air interface in the coating film when the solvent is dried, so prevent the curing inhibition of UV curable resin by oxygen. It is possible to obtain a cured coating film having sufficient hardness even when the irradiation intensity of ultraviolet rays is low.

Further, since the sliding property of silicone is imparted, the scratch resistance is improved. Solvent-drying resin: The coating material for forming the hard coat coating film having the antiglare property used in the present invention contains 10 parts by weight or more and 100 parts by weight or less of the solvent-drying resin with respect to 100 parts by weight of the ionizing radiation curing resin. I don't mind. A thermoplastic resin is mainly used as the solvent-drying resin. The type of solvent-drying type thermoplastic resin added to the ionizing radiation-curable resin is usually used, especially when a mixture of polyester acrylate and polyurethane acrylate is used in the ionizing radiation-curable resin composition. As the solvent-drying resin used, polymethacrylic acid methyl acrylate or polymethacrylic acid butyl acrylate can keep the hardness of the coating film high. And in this case,
Since it has a refractive index close to that of the main ionizing radiation-curable resin, it does not impair the transparency of the coating film, and is advantageous in terms of transparency, particularly low haze value, high transmittance, and compatibility.

When a cellulosic resin such as triacetyl cellulose is used as the transparent substrate, a solvent-drying resin such as nitrocellulose, acetyl cellulose, cellulose acetate propionate, ethyl hydroxyethyl cellulose or the like, and a cellulosic resin thereof are used. The use of toluene as a solvent is advantageous in terms of adhesion and transparency of the coating film. That is, even though toluene, which is a solvent that is insoluble in triacetyl cellulose that is a transparent substrate and is inferior in imparting adhesion, is used as a solvent for the cellulosic resin, a coating containing this solvent-drying resin on the transparent substrate. The adhesiveness between the transparent substrate and the coating resin can be improved even when the coating is performed. Moreover, since this toluene does not dissolve the triacetyl cellulose, which is the transparent substrate, the surface of the transparent substrate is not whitened, and there is an advantage that the transparency is maintained.

Curing method: The curing method of the coating material essentially composed of the ionizing radiation curable resin composition is a usual curing method of the ionizing radiation curable resin composition, that is, electromagnetic waves such as ultraviolet rays and visible rays, or electrons. It can be cured by irradiation with rays. For example, in the case of electron beam curing, 50 to 1000 KeV emitted from various electron beam accelerators such as Cockloft-Walton type, Van de Graaff type, resonance transformer type, insulating core transformer type, linear type, dynamitron type, and high frequency type, An electron beam or the like having an energy of 100 to 300 KeV is preferably used, and in the case of curing by electromagnetic waves such as ultraviolet rays and visible rays, light rays of an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, a metal halide lamp, etc. Electromagnetic waves emitted from can be used.

Polarizing element: The polarizing element used in the present invention includes a polyvinyl alcohol film, a polyvinyl formal film, a polyvinyl acetal film, an ethylene-vinyl acetate copolymer saponified by dyeing with iodine or a dye and stretching. A film or the like can be used. In laminating the scratch-resistant antiglare film of the present invention on this polarizing element, in order to increase the adhesiveness and to prevent static electricity, when the transparent protective substrate is, for example, a triacetyl cellulose film, The acetyl cellulose film is saponified. This saponification treatment may be performed before or after the hard coating treatment is performed on the triacetyl cellulose film.

II. Invention for Achieving the Second Objective In order to achieve the second objective, the present invention provides an antistatic layer containing a conductive filler on a transparent substrate and having a refractive index of 1. A scratch-resistant antiglare film, characterized in that an antiglare layer essentially consisting of 40 to 1.60 resin beads and an ionizing radiation curable resin composition is formed.

In order to achieve the second object, the present invention provides a polarizing plate characterized in that the anti-scratch-resistant antiglare film having antistatic property is laminated on a polarizing element. . In order to achieve the second object, the present invention forms a coating film by applying an antistatic coating composition containing a conductive filler and essentially consisting of an ionizing radiation curable resin composition on a transparent substrate. The coating film of the antistatic coating is touch-dried or half-cured to form a semi-cured layer, and resin beads having a refractive index of 1.40 to 1.60 and an ionizing radiation curable resin are formed on the semi-cured layer. An anti-glare coating essentially composed of the composition is applied to form an uncured layer, and the two-layer coating film is irradiated with ionizing radiation to completely cure the coating films of the respective layers at the same time. A method for producing a scratch-resistant antiglare film having antistatic properties.

FIG. 2 is a sectional view of the anti-scratch and anti-glare film having the antistatic property of the present invention. In FIG. 2, 1 is a transparent substrate, 2 is an antiglare layer, 3 is resin beads, and 4 is an antistatic layer. The thickness of the antistatic layer 4 is 1 to 10 μm, preferably 3 to 7 μm. The reason is that as the film thickness increases, the haze value increases and to obtain an appropriate resistance value. Further, the antistatic layer 4 can be provided on one side or both sides of the transparent substrate 1, but the one provided on the front surface side is likely to exhibit antistatic performance.

The invention for achieving the second object will be described in more detail below. The transparent substrate that can be used in the present invention includes the I. The same transparent substrate as described in the description of the invention for achieving the first object can be applied. The ionizing radiation-curable resin, resin beads, and polarizing element used in the antiglare coating composition of the present invention include the above-mentioned I. The same as mentioned in the description of the invention for achieving the first object of the section can be used.

The antiglare paint according to the present invention includes the above-mentioned I. The same antistatic agents and / or leveling agents as mentioned in the description of the invention for achieving the first object of the section can be included. The antiglare coating having scratch resistance used in the present invention may contain 10 parts by weight or more and 100 parts by weight or less of the solvent drying type resin with respect to 100 parts by weight of the ionizing radiation curable resin. This solvent-drying type resin includes I. The same resins as mentioned in the description of the invention for achieving the first object of the column can be used. The coating and curing method is described in I. This is the same as the description of the invention for achieving the first object of the section.

Antistatic layer: The antistatic coating used in the antistatic layer of the present invention includes various metal powders such as silver, copper and nickel, carbon black, and metal oxide powders such as tin oxide and titanium oxide. Alternatively, a resin composition containing a conductive pigment selected from flakes is used. In particular, tin oxide has good transparency, and when a particle size of 0.05 to 0.1 μm is used, the haze value of the obtained antiglare film is in the range of 0 to 2 (value without an antiglare layer). It is preferable that

The resin used in the antistatic coating is a resin which is cured mainly by ultraviolet rays or electron beams, that is, an ionizing radiation curable resin alone or a mixture of an ionizing radiation curable resin and a thermoplastic resin. A mixture of an ionizing radiation curable resin with a thermosetting resin and a solid-phase reaction type ionizing radiation curable resin are used. The ionizing radiation curable resin used in the antistatic coating ~
Preferably, those having an acrylate-based functional group, for example, relatively low molecular weight polyester resin, polyether resin, acrylic resin, epoxy resin, urethane resin,
Alkyd resin, spiro acetal resin, polybutadiene resin, polythiol polyene resin, oligomer or prepolymer such as (meth) acrylate of polyfunctional compound such as polyhydric alcohol and ethyl (meth) acrylate, ethylhexyl (meth) acrylate as reactive diluent , Styrene, methylstyrene, N-vinylpyrrolidone, and other monofunctional and polyfunctional monomers such as trimethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di ( (Meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,6-hexanediol di (meth) acrylate DOO, those relatively high content of neopentyl glycol di (meth) acrylate can be used.

Further, in order to make the above-mentioned ionizing radiation curable resin composition into an ultraviolet curable resin composition, acetophenones, benzophenones, Michler benzoyl benzoate, α-amyloxime are used as photopolymerization initiators therein. Ester, tetramethylthiuram monosulfide,
Thioxanthones and n-butylamine, triethylamine, tri-n-butylphosphine and the like can be mixed and used as a photosensitizer. Particularly in the present invention, it is preferable to mix urethane acrylate as the oligomer and dipentaerythritol hexaacrylate as the monomer.

As the thermoplastic resin mixed with the above-mentioned ionizing radiation-curable resin, any one can be used as long as it imparts viscosity to the ionizing radiation-curable resin, but in particular, in order to keep the hardness of the coating film high. Is polymethylmethacrylate,
A thermoplastic resin such as polybutyl methacrylate can be preferably used. The purpose of mixing the thermoplastic resin with the ionizing radiation curable resin composition is to semi-cure the coating film when the antistatic coating material is applied, as described in detail later. The mixing ratio of the thermoplastic resin to the ionizing radiation curable resin is
For the purpose of semi-curing the coating film, the amount of the ionizing radiation curable resin is 100 parts by weight and the thermoplastic resin is 50 parts by weight or less.

The thermosetting resin mixed with the above ionizing radiation curable resin includes phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin,
There are unsaturated polyester-based resins, polyurethane-based resins, epoxy resins, aminoalkyd resins, melamine / urea co-condensed resins, silicon resins, polysiloxane resins, etc., and if necessary, as additives, crosslinking agents, polymerization initiators, etc. Curing agent, polymerization accelerator, solvent, viscosity modifier, extender pigment and the like. As the curing agent, usually, isocyanate is an unsaturated polyester resin or polyurethane resin, and peroxide such as methyl ethyl ketone peroxide and a radical initiator such as azobisisobutyronitrile are often used for the unsaturated polyester resin. . Furthermore, as the isocyanate as the curing agent, divalent or higher valent aliphatic or aromatic isocyanate can be used.

The solid-phase reaction type ionizing radiation curable resin described above is solid at room temperature in the uncured state and is thermoplastic.
Ionizing radiation curing that gives a coating that is solvent-soluble but non-fluid (dry to the touch) even when touched by hand by coating and drying and that is non-adhesive Mold resin is the main component. In particular,
For example, the following two types of resins (a) and (b) are exemplified. A similar resin is disclosed in JP-A-1-202492. Furthermore, the resins shown in (a) and (b) below can be mixed and used.
On the other hand, a radically polymerizable unsaturated monomer may be added and used. Reactive diluents, sensitizers and the like used in ordinary ionizing radiation curable resins are added to these resins. Further, a non-crosslinking thermoplastic resin may be added to obtain flexibility of the cured resin product.

(A) A resin having a radically polymerizable unsaturated group in a polymer having a glass transition temperature of 0 to 250 ° C. Specifically, for those obtained by polymerizing or copolymerizing the following monomers,
The a. ~ D. It is a resin in which a radical copolymerizable unsaturated group is introduced by the method of 1. Monomers having a hydroxyl group: for example, N-methylol (meth) acrylamide, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 2
-Hydroxypropyl (meth) acrylate and the like.

Monomers having a carboxyl group: For example,
Examples include (meth) acrylic acid and (meth) acryloyloxyethyl monosuccinate. Monomers having epoxy groups: For example, glycidyl (meth) acrylate and the like. Monomers having an aziridinyl group: 2-aziridinylethyl (meth) acrylate, allyl 2-aziridinylpropionate and the like.

Monomers having amino groups: (meth) acrylamide, diacetone (meth) acrylamide, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate and the like. Monomers having sulfone groups: 2- (meth) acrylamido-2-methylpropanesulfonic acid and the like.

Monomers having isocyanate groups: 2,4
-Toluene diisocyanate and 2-hydroxyethyl (meth) acrylate 1 mole to 1 mole adduct and the like, and the like, the adduct of diisocyanate and a radical copolymer having active hydrogen, and the like. Further, in order to control the glass transition temperature of the copolymer and the physical properties of the cured film, each of the monomers listed above and the following compounds can be copolymerized. Examples of such a copolymerizable monomer include, for example, methyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth).
Examples thereof include acrylate, gt-butyl (meth) acrylate, isoamyl (meth) acrylate, cyclohexyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.

With respect to those obtained by polymerizing or copolymerizing each of the above monomers, the following a. ~ D. By introducing a radically polymerizable unsaturated group by the method of
An ionizing radiation curable resin such as an ultraviolet curable resin or an electron beam curable resin can be obtained. a. In the case of a polymer or copolymer of a monomer having a hydroxyl group, a monomer having a carboxyl group such as (meth) acrylic acid is subjected to a condensation reaction.

B. In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfone group, the above-mentioned monomer having a hydroxyl group is subjected to a condensation reaction. c. In the case of a polymer or copolymer of a monomer having an epoxy group, an isocyanate group or an aziridinyl group, the above-mentioned monomer having a hydroxyl group or a monomer having a carboxyl group is subjected to an addition reaction.

D. In the case of a polymer or copolymer of a monomer having a hydroxyl group or a carboxyl group, 1 of a monomer having an epoxy group, a monomer having an aziridinyl group or a diisocyanate compound and a hydroxyl group-containing acrylic acid ester monomer is used. Addition reaction is made with moles to 1 mole of adduct. In order to carry out the above reaction, it is desirable to add a small amount of a polymerization inhibitor such as hydroquinone and to carry out while sending dry air.

(B) A resin having a radical-polymerizable unsaturated group having a melting point of room temperature (20 ° C.) to 250 ° C. Specific examples thereof include stearyl acrylate, stearyl (meth) acrylate, triacrylic isocyanate, cyclohexanediol (meth) acrylate, spiroglycol diacrylate, and spiroglycol (meth) acrylate.

Method of curing coating film: In the present invention, the coating film of the antistatic coating material coated on the transparent substrate is dried by touch or half-cured to form a semi-cured layer, on which scratch resistance is prevented. Dazzling paint is applied and both coatings are cured simultaneously. The reason why the antistatic coating is semi-cured in advance when the two coatings are overcoated is that the antiglare coating is applied on the coating of the completely cured antistatic coating to form the antiglare layer. Adhesiveness is poor, and defects such as peeling occur, but if the antiglare coating is semi-cured, the antiglare coating is applied repeatedly, and then both coatings are completely cured, This is because the adhesion between layers is good. In the present invention, semi-curing is classified as follows depending on the type of resin used.

(1) Solvent drying type semi-curing a. Solvent-drying semi-curing The coating film formed by applying a solvent to a normal ionizing radiation-curing resin and drying the solvent is a semi-cured state, and the ionizing radiation-curing resin is a curing reaction. Is not completed.

Since the above composition alone cannot maintain a sufficient viscosity, a solvent-drying thermoplastic resin is added to adjust the viscosity suitable for coating. When a coating film is formed using this resin composition, the solvent is released and diffused during drying, and the coating film is in a semi-cured state. The type of solvent-drying thermoplastic resin added to the ionizing radiation-curable resin is usually used, but especially when polymethylmethacrylate or polybutylmethacrylate is used, it is possible to keep the hardness of the coating film high. it can. Moreover, in this case, since the refractive index is close to that of the main ionizing radiation curable resin, the transparency of the coating film is not impaired, which is advantageous in transparency. As another example of the solvent-drying thermoplastic resin, when a cellulose-based polymer is added to an ionizing radiation-curable resin, when triacetyl cellulose is used as a transparent substrate, toluene, which is a non-soluble solvent of triacetyl cellulose, is used. Even if the transparent substrate is coated with the resin, the adhesion between the transparent substrate and the coating resin can be improved. Moreover, since toluene has a property of not dissolving triacetyl cellulose as a transparent substrate, it does not whiten the transparent substrate.

The mixing ratio of this resin composition is such that the addition amount of the thermoplastic resin is 50 parts by weight or less with respect to 100 parts by weight of the ionizing radiation curable resin. If the amount of the thermoplastic resin added is more than this, the hardness of the antiglare layer cannot be kept high, and the scratch resistance becomes poor. b. Solid-state reaction-type ionizing radiation curing type semi-curing This semi-curing is a state of semi-curing by the solid-state reaction type ionizing radiation-curing resin, which is solid at room temperature in the uncured state, and is thermoplastic and solvent It refers to a state in which the resin has solubility, is non-fluid and non-tacky by appearance and by touching with coating and drying, and the curing reaction of the ionizing radiation curable resin is not completed.

(2) Half cure type semi-curing a. Ionizing radiation curable resin semi-crosslinking type semi-curing Apply using the ordinary ionizing radiation curable resin shown in the section of the antistatic layer, and adjust the irradiation conditions of ionizing radiation such as ultraviolet rays or electron beams to the coating film. It means a semi-cured state formed by carrying out semi-crosslinking.

B. Ionizing radiation curable resin / thermosetting resin blend type semi-curing Applying a resin composition obtained by mixing a thermosetting resin with the ionizing radiation curable resin described in the section of the antistatic layer, and applying heat to the coating film. Means a semi-cured state formed by.
The compounding ratio of this resin composition is the ionizing radiation curable resin 1
The addition amount of the thermosetting resin is 50 parts by weight or less with respect to 00 parts by weight. This is because if the addition amount of the thermosetting resin is more than this, proper curing cannot be obtained at the time of irradiation with ionizing radiation, resulting in poor adhesion.

C. Solvent-drying / half-cure composite semi-curing This is a state in which the solvent-drying semi-curing state (1) is further irradiated with ionizing radiation to be a semi-curing state. This semi-cured state is the same as the semi-cured state described in JP-A-1-20249. The complete curing of the two-layer coating film of the semi-cured antistatic layer and the uncured antiglare layer in the present invention is performed simultaneously by irradiation with ionizing radiation. At the stage when the ionizing radiation curable resin composition is applied on the antistatic layer, the coating film of the antistatic layer is in a semi-cured state, and the ionizing radiation curable resin component contained in the coating film of the antistatic layer is Not completely cured. Therefore, since the ionizing radiation-curable resin in the coating films of both the antistatic layer and the antiglare layer contains an uncured component, both coating films are completely cured at the same time by irradiation with ionizing radiation.

The method for curing the ionizing radiation-curable resin composition used in the present invention is a usual method for curing an ionizing radiation-curable resin composition, that is, electromagnetic waves such as ultraviolet rays and visible rays, or particle beams such as electron beams. Can be cured by. For example, in the case of electron beam curing, 50 to 1000 KeV emitted from various electron beam accelerators such as Cockloft-Walton type, Van de Graaff type, resonance transformer type, insulating core transformer type, linear type, dynamitron type, and high frequency type, Preferably 10
An electron beam having an energy of 0 to 300 KeV is used, and when it is cured by electromagnetic waves such as ultraviolet rays and visible rays, it is emitted from light rays such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, and a metal halide lamp. Electromagnetic waves can be used.

The polarizing element used in the present invention includes: The same polarizing element as that used in the invention described in the section can be used. III. Invention that achieves the third object The polarizing element used in the present invention that achieves the third object is
Generally, there is a drawback that the polarizing element is deteriorated by moisture from the outside. Therefore, it is necessary to provide a moisture-proof layer on the scratch-resistant antiglare film and / or the polarizing plate to protect the polarizing element from intrusion of moisture.

Therefore, in the present invention, a moisture-proof layer can be provided on the scratch-resistant antiglare film. That is, the present invention has a moisture-proof layer formed on one side or both sides of a transparent substrate, and further comprises an anti-glare layer essentially consisting of resin beads having a refractive index of 1.40 to 1.60 and an ionizing radiation curable resin composition. A scratch-resistant antiglare film characterized by being formed. 3, 4 and 5 are cross-sectional views showing a constitutional example of a scratch-resistant antiglare film on which a moisture-proof layer is formed.
3 and 5 show a scratch-resistant antiglare film in which the moistureproof layer 5 is formed on one surface of the transparent substrate 1, and in FIG. 3, the antiglare layer 2 is formed on the moistureproof layer 5, and FIG. The antiglare layer 2 is formed on the surface opposite to the surface of the transparent substrate 1 on which the moistureproof layer 5 is formed. In FIG. 4, the moisture-proof layer 5 is formed on both sides of the transparent substrate 1, and the anti-glare layer 2 is further formed on one surface thereof.

The polarizing plate of the present invention is formed by laminating the scratch-resistant antiglare film having the moisture-proof layer formed thereon to a polarizing element. In this way, it is also effective to form the moisture-proof layer directly or indirectly on the polarizing element from the viewpoint of moisture-proof. That is, the present invention includes a polarizing element and the various scratch-resistant anti-glare films arranged on one surface of the polarizing element, the scratch-resistant anti-glare film and the interlayer of the polarizing element, and The polarizing plate is characterized in that at least one moisture-proof layer is formed on the exposed surface of the polarizing element and the whole is laminated.

Further, the present invention is characterized in that, on one surface of the polarizing element,
A scratch-resistant antiglare film is arranged, a transparent substrate such as triacetyl cellulose is arranged on the other surface of the polarizing element, and at least one moisture-proof layer is formed on each layer and on the exposed surface of the transparent substrate. It can be a polarizing plate. Next, an example in which a moisture-proof layer is formed on the polarizing plate of the present invention will be described. 6, FIG. 7, FIG. 8 and FIG. 9 are cross-sectional views showing a constitutional example of each layer of the polarizing plate on which the moisture-proof layer is formed. FIG. 6 shows a polarizing plate in which the scratch-resistant antiglare film 7 is arranged on one surface of the polarizing element 6 and the transparent substrate 11 is arranged on the other surface of the polarizing element 6, in which the transparent substrate 11 and the polarizing element 6 are arranged. Between
The moisture-proof layer 15 is formed. Further, in FIG. 7, the moisture-proof layer 15 is formed on the exposed surface side of the transparent substrate 11. Further, in FIG. 8, the moisture-proof layer 15 is formed between the transparent substrate 11 and the polarizing element 6 and on the exposed surface side of the transparent substrate 11. FIG. 9 shows a polarizing plate in which the scratch-resistant antiglare film 7 is disposed on one surface of the polarizing element 6 and the transparent substrate 11 is disposed on the other surface of the polarizing element 6, and at least one layer is provided between the layers. The position where the above moisture-proof layer 15 can be formed is shown.

The material of the moisture-proof layer is polytetrafluoroethylene, fluororesin, acrylic resin, silicon dioxide,
Indium oxide, tin oxide, titanium oxide, aluminum oxide, zirconium oxide, magnesium fluoride, zinc oxide or the like is used. As a method of forming the moisture-proof layer, a thin film forming method such as a plasma polymerization method, a vacuum vapor deposition method, a sputtering method, an ion plating method, or a thick film forming method is used.

II. Also in the scratch-resistant antiglare film and the polarizing plate described in the section, Similar to the scratch-resistant antiglare film and the antiglare layer disposed on the polarizing plate described in the section, one or more moistureproof layers can be appropriately provided between the layers and on the exposed surface. The method for producing a scratch-resistant antiglare film having a moisture-proof layer of the present invention is described in I. Column and I
I. In the method for producing the scratch-resistant antiglare film described in the section, it can be produced by using a transparent substrate having a moisture-proof layer formed in advance by the method for forming the moisture-proof layer.

As described above, I. II. Although the present invention has been described separately in each section of III., The scratch-resistant antiglare film provided by the present invention, a polarizing plate using the scratch-resistant antiglare film, and a method for producing the scratch-resistant antiglare film Can be applied to various displays such as word processors, computers, and televisions, particularly liquid crystal displays.

[0070]

Example 1 A mixture of polyester acrylate and polyurethane acrylate (E
XG: product name: manufactured by Dainichiseika Co., Ltd.) 100
37 parts by weight of poly (methyl methacrylate) as a thermoplastic resin was compounded with respect to parts by weight. As resin beads for imparting antiglare properties, 4 parts by weight of poly (methyl methacrylate) beads having a particle diameter of 5 μm were mixed with 100 parts by weight of the resin. As a settling agent for resin beads, 0.2 part by weight of silica beads having a particle size of 0.25 μm was mixed with 100 parts by weight of the resin to obtain a coating composition for imparting antiglare properties.

The coating composition was applied onto a triacetyl cellulose film by a reverse roll coating method so that the film thickness would be 7 μm (when dried). Then 1
The resin was cured by passing it under a UV irradiation device of 60 W at a speed of 10 m / min to obtain a triacetylcellulose film having a hard coat layer having a matte surface, that is, having scratch resistance and antiglare properties.

For comparison with the optical properties of the scratch-resistant and antiglare triacetylcellulose film thus obtained, a conventional hard coat layer containing a matting agent was formed as a conventional product for comparison. Table 2 below shows a comparison of the optical characteristics of the triacetyl cellulose film having the dazzling property before saponification. This hard coat layer contains 4 parts of silica having a particle size of 5 μm, which is a matting agent, per 100 parts by weight of the resin.
4.5 parts by weight of polyester acrylate added
It is coated so as to have a thickness of μm, cured by irradiation with ultraviolet rays, and is unsaponified.

[0073]

[Table 2]

By saponifying the triacetylcellulose film having the antiglare property, the polarizing element, that is, the polarizing element made of a polyvinyl alcohol film, has an effect of increasing the adhesiveness and an antistatic effect, A polarizing plate was manufactured by dry laminating with a polarizing element using an adhesive. The haze value of the triacetyl cellulose film after saponification was 9.4% for the product of the present invention and 22% for the conventional product, both of which are slightly higher than those before saponification. The polarizing plate of Example 1 has a far smaller haze value than the conventional product. From these haze values and Table 2, it can be seen that the scratch-resistant polarizing element and the polarizing plate of Example 1 are excellent in resolution, contrast and transparency.

[0075]

Example 2 Among the mixed components of the coating composition for imparting the antiglare property in Example 1, 17 parts by weight of a cellulosic polymer was used instead of 37 parts by weight of polymethylmethacrylate acrylate which was a thermoplastic resin. Other than that,
In the same manner as in Example 1, a scratch-resistant and antiglare triacetylcellulose film was obtained. This scratch-resistant antiglare film was placed in a 3N aqueous sodium hydroxide solution (60 ° C.),
After soaking for 5 minutes, a cross-cut peeling test was performed. As a result, the adhesiveness was 100/100.

The abrasion-resistant and antiglare triacetylcellulose film of Comparative Example produced without adding the cellulosic polymer had a cross-cut peeling test of 50/10.
It was 0 and 80/100 in the case of the above-mentioned Example 1, that is, when poly (methyl methacrylate) was added as the thermoplastic resin.

[0077]

Example 3 To the coating composition for imparting the antiglare property in Example 1 described above, an antistatic agent that became transparent after film formation and ultrafine particles of indium oxide were further added. A scratch-resistant and antiglare triacetylcellulose film was produced in the same manner as in Example 1 except that 50 parts by weight was added to 100 parts by weight of the coating which imparts the antiglare property.

The surface resistance value of the obtained scratch resistant antiglare film was 10 ⁹ Ω / cm ² . The total light transmittance was 87.5%, the haze value was 5.0, and the pencil hardness was 2H.

[0079]

Example 4 The same method as in Example 1 was repeated except that 0.1% by weight of a silicone-based oil was added as a leveling agent to the coating composition for imparting the antiglare property in Example 1 above. A dazzling triacetyl cellulose film was produced. Example 1 was used as a comparative example of Example 4.

Taber abrasion test of the obtained scratch-resistant antiglare film (wear wheel CS-10F 500 g × 2 load 100)
The change ΔH in haze value before and after the rotation was examined.
As a result, ΔH of the scratch-resistant and antiglare triacetylcellulose film of Comparative Example to which the leveling agent was not added was 6.5.
In contrast, in the case of the fourth embodiment, ΔH is 3.5.
Therefore, the amount of increase in haze value is small. Therefore, it can be seen that the scratch-resistant polarizing element and the polarizing plate of Example 4 are advantageous in resolution, contrast, and transparency.

[0081]

Example 5: F as a triacetyl cellulose film
A polytetrafluoroethylene thin film was formed on T-UV-80 (trade name: manufactured by Fuji Photo Film Co., Ltd.) by plasma polymerization. On the side opposite to the thin film forming surface, the coating composition for imparting the antiglare property described in Example 1 was applied by a reverse roll coating method to a film thickness of 7 μm (when dried).
To obtain a scratch-resistant antiglare film having a moisture-proof layer formed thereon.

On the other hand, a polytetrafluoroethylene thin film was formed on the triacetyl cellulose film by plasma polymerization in the same manner as described above to obtain a transparent substrate on which a moisture-proof layer was formed. Separately, a polarizing element made of a polyvinyl alcohol film is prepared, and the polarizing element is formed by a scratch-resistant antiglare film having the moisture-proof layer formed thereon and a transparent substrate having the moisture-proof layer formed thereon. Then, it was sandwiched and laminated to obtain a polarizing plate having moisture resistance and scratch resistance and antiglare property.

[0083]

Example 6 F as a triacetyl cellulose film
A polytetrafluoroethylene thin film was formed on T-UV-80 (trade name: manufactured by Fuji Photo Film Co., Ltd.) by plasma polymerization. The coating composition for imparting the antiglare property described in Example 1 was applied on the thin film forming surface by a reverse roll coating method to a film thickness of 7 μm (when dried) to form a moisture-proof layer. A scratch resistant antiglare film was obtained.

On the other hand, a polytetrafluoroethylene thin film was formed on the triacetyl cellulose film by plasma polymerization in the same manner as described above to obtain a transparent substrate on which a moisture-proof layer was formed. Separately, a polarizing element made of a polyvinyl alcohol film is prepared, and the polarizing element is sandwiched and laminated by a scratch-resistant antiglare film having the moisture-proof layer formed thereon and a transparent substrate having the moisture-proof layer formed thereon to prevent moisture. A polarizing plate having the properties of scratch resistance and antiglare property was obtained.

[0085]

Example 7 A UV-curable resin (E) made of a mixture of polyester acrylate and polyurethane acrylate
An antistatic paint was prepared by adding 80 parts by weight of tin oxide SnO ₂ (made by Sumitomo Cement), which is a conductive pigment, to 100 parts by weight of XG: trade name: manufactured by Dainichiseika. This antistatic paint was applied onto a triacetyl cellulose film having a thickness of 80 μm so as to have a thickness of 4 μm (when dried), and passed under a high pressure mercury lamp of 80 W at a speed of 20 m / min to obtain a half-cured state. It was semi-cured.

On the semi-cured coating film, an ultraviolet curable resin (EXG40: trade name: manufactured by Dainichiseika) containing 4% by weight of poly (methyl methacrylate) beads having a particle size of 6 μm was diluted to 40% by weight with methyl ethyl ketone. Then, coating was performed so that the film thickness was 6 μm (when dried). Apply this coating under a 160 W high pressure mercury lamp at a speed of 5 m / min for 2
A thickness of 8 with antistatic properties by passing through 8 times
A scratch resistant antiglare film having a thickness of 0 μm was obtained. The surface resistance value of the scratch-resistant antiglare film thus obtained was 2 × 10 5.
^It was excellent in ¹⁰ Ω, haze value 14%, total light transmittance 86%, diffuse transmittance 12%, and 60 ° gloss value 72%.

The anti-scratch and anti-glare film having antistatic property is subjected to saponification treatment so as to have an effect of enhancing adhesiveness with a polarizing element, that is, a polarizing element made of a polyvinyl alcohol film, and an antistatic effect. A polarizing plate was manufactured by dry laminating with a polarizing element using an adhesive.

[0088]

EFFECTS OF THE INVENTION By adopting the above constitution, the present invention is excellent in antiglare property and at the same time excellent in transparency, and further,
Provided are a method for producing a transparent protective substrate having excellent resolution and contrast, having good surface hardness and solvent resistance and being antistatic, a transparent protective substrate obtained by the method, and a polarizing plate using this transparent protective substrate. can do.

Further, the present invention can be obtained by a method for producing a transparent protective substrate which does not reduce the haze value, contrast and transparency even when saponification is carried out, particularly when an acetyl cellulose film is used as the transparent substrate, and a method for producing the same. It is possible to provide the transparent protective substrate and a polarizing plate using the transparent protective substrate. Further, in order to adjust the optical characteristics of the scratch-resistant antiglare film of the present invention, it is sufficient to change the content of the resin beads contained in the antiglare layer, and the adjustment is easy.

When a cellulosic polymer is used as the solvent-drying resin and triacetyl cellulose is used as the transparent substrate, toluene that is insoluble in triacetyl cellulose is used as the solvent for the cellulosic resin. Nevertheless, the adhesion between the transparent substrate and the coating resin can be improved. Moreover, since this toluene does not dissolve the triacetyl cellulose, which is the transparent substrate, the surface of the transparent substrate is not whitened, and there is an advantage that the transparency is maintained.

Furthermore, an ultraviolet ray curable resin is used as the ionizing radiation curable resin used in the present invention, and a leveling agent that bleeds to the air interface such as a fluorine type or silicone type is added to the resin so that it can be irradiated with ultraviolet rays. Curing inhibition by oxygen can be prevented. Further, according to the present invention, excellent moisture resistance to the polarizing element, and, at the same time excellent in antiglare properties, excellent scratch resistance antiglare film, a polarizing plate using the scratch resistance antiglare film, And the manufacturing method of a scratch-resistant antiglare film can be provided.

[Brief description of drawings]

FIG. 1 shows a cross section of a scratch-resistant antiglare film of the present invention.

FIG. 2 shows a cross section of a scratch resistant antiglare film having antistatic properties according to the present invention.

FIG. 3 shows a cross section of a scratch-resistant antiglare film having a moisture-proof layer of the present invention.

FIG. 4 shows a cross section of another scratch-resistant antiglare film having a moisture-proof layer of the present invention.

FIG. 5 shows a cross section of yet another scratch-resistant antiglare film having a moisture-proof layer of the present invention formed thereon.

FIG. 6 shows a cross section of a polarizing plate having a moisture-proof layer of the present invention.

FIG. 7 shows a cross section of another polarizing plate on which the moisture-proof layer of the present invention is formed.

FIG. 8 shows a cross section of still another polarizing plate on which the moisture-proof layer of the present invention is formed.

FIG. 9 shows a cross section of still another polarizing plate on which the moisture-proof layer of the present invention is formed.

[Explanation of symbols]

 1,11 Transparent substrate 2 Antiglare layer 3 Resin beads 4 Antistatic layer 5,15 Moistureproof layer 6 Polarizing element 7 Scratch resistant antiglare film

Claims (18)

[Claims] 1. A refractive index of 1.40 to 1.6 on a transparent substrate.
A scratch-resistant antiglare film, characterized in that an antiglare layer essentially consisting of 0 resin beads and an ionizing radiation curable resin composition is formed. 2. An antistatic layer containing a conductive filler is formed on a transparent substrate, and a refractive index of 1.40 is formed on the layer.
A scratch-resistant antiglare film, characterized in that an antiglare layer consisting essentially of resin beads of 1.60 and an ionizing radiation curable resin composition is formed. 3. A moisture-proof layer is formed on one or both sides of a transparent substrate, and the refractive index of 1.40 to 1.40 is further provided on any one side.
1. A scratch-resistant antiglare film, characterized in that an antiglare layer consisting essentially of 1.60 resin beads and an ionizing radiation curable resin composition is formed. 4. A moisture-proof layer is formed on one surface or both surfaces of a transparent substrate, and an antistatic layer containing a conductive filler is formed on either one of the surfaces, and a refractive index of 1.
A scratch-resistant antiglare film, characterized in that an antiglare layer essentially consisting of 40 to 1.60 resin beads and an ionizing radiation curable resin composition is formed. 5. The scratch-resistant antiglare film according to claim 1, 2, 3 or 4, wherein the antiglare layer contains an antistatic agent which becomes transparent after film formation. 6. A polarizing plate comprising the polarizing element and the scratch-resistant antiglare film according to claim 1, 2, 3, 4 or 5. 7. A polarizing element, comprising: the polarizing element; and the scratch-resistant antiglare film as set forth in claim 1, 2, 3, 4, or 5, which is disposed on one surface of the polarizing element. A polarizing plate, characterized in that at least one moisture-proof layer is formed between the scratch-resistant antiglare film and the polarizing element and on the exposed surface of the polarizing element, and the whole is laminated. 8. (1) A polarizing element, the scratch-resistant antiglare film according to claim 1, 2, 3, 4 or 5 disposed on one surface of the polarizing element, and the other of the polarizing elements. (2) at least one moisture-proof layer on the exposed surface of the transparent substrate, and (2) each layer of the arrangement including the scratch-resistant antiglare film, the polarizing element and the transparent substrate. A polarizing plate having a layer formed and entirely laminated. 9. (1) A transparent substrate having a refractive index of 1.40 to 1.40.
1. A resin bead of 1.60 and an antiglare paint essentially composed of an ionizing radiation curable resin composition are applied, and (2) the coating film of the uncured antiglare paint is irradiated with ionizing radiation. A method for producing a scratch-resistant antiglare film, which comprises curing the coating film of the antiglare paint. 10. A transparent substrate is coated with an antistatic coating composition containing a conductive filler and essentially consisting of an ionizing radiation curable resin composition to form a coating film. (2) The charging A semi-cured layer is formed by touch-drying or half-curing the coating film of the prevention coating, and (3) resin beads having a refractive index of 1.40 to 1.60 and an ionizing radiation curable resin are formed on the semi-cured layer. An uncured layer is formed by applying an antiglare paint essentially consisting of the composition, and (4) each layer is formed by irradiating the two-layer coating film consisting of the semi-cured layer and the uncured layer with ionizing radiation. A method for producing a scratch-resistant antiglare film having antistatic properties, characterized in that the coating film of (1) is completely cured at the same time. 11. The method for producing a scratch-resistant antiglare film according to claim 9, wherein the transparent substrate has a moisture-proof layer formed on one surface or both surfaces thereof. 12. An anti-glare coating is an ionizing radiation curable resin 1
10 parts by weight or more of solvent-drying resin with respect to 00 parts by weight
The method for producing a scratch-resistant antiglare film according to claim 9, 10 or 11, wherein the content is 0 part by weight or less. 13. The method for producing a scratch-resistant antiglare film according to claim 12, wherein the solvent-drying resin is a cellulosic polymer. 14. The method for producing a scratch-resistant antiglare film according to claim 12, wherein the solvent-drying resin is a cellulosic polymer, and the solvent added and dissolved in the resin is toluene. 15. The ionizing radiation-curable resin composition essentially comprises polyester acrylate and polyurethane acrylate.
Or the method for producing a scratch-resistant antiglare film as described in 14 above. 16. The anti-glare coating comprises less than 0.1 part by weight of silica beads having a particle size of 0.5 μm or less as an anti-sedimentation agent for resin beads, relative to 100 parts by weight of an ionizing radiation curable resin. Claims 9, 10, 11, 1 characterized
A method for producing a scratch-resistant antiglare film as described in 2, 13, 14 or 15. 17. The anti-glare coating as claimed in claim 9, wherein the anti-glare coating contains an antistatic agent which becomes transparent after the coating is cured. Method for producing scratch-resistant antiglare film. 18. The antiglare coating material contains a leveling agent capable of bleeding to the air interface, as claimed in claims 9, 10, 11, 12, 13, 13, 15, 15.
The method for producing a scratch-resistant antiglare film as described in 6 or 17.