Hard-coated antiglare film, polarizing plate, image display, and method of manufacturing hard-coated antiglare film

A manufacturing method and anti-glare technology, used in polarizing elements, coatings, nonlinear optics, etc., can solve the problem of irrespective of the surface roughness of the anti-glare hard coating, and the hardness and anti-glare properties are not satisfactorily resolved. Unable to obtain sufficient hardness, etc., to achieve the effects of excellent anti-glare, excellent operability, and excellent display characteristics

Inactive Publication Date: 2007-10-31
NITTO DENKO CORP
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0011] However, in these existing anti-glare hard-coated films, the problems of hardness and anti-glare properties have not been satisfactorily solved.
In Japanese Patent Laid-Open No. 11-286083, there is a problem that when the thickness of the above-mentioned hard coat layer is the above-mentioned level, sufficient hardness cannot be exhibited.
In Japanese Patent Laid-Open No. 2000-326447, there is a problem that if the above-mentioned structure is used, the surface roughness of the anti-glare hard coat surface is completely ignored, and the above-mentioned inorganic particles are completely embedded in the above-mentioned anti-glare hard coating. In the case of a structure like the inside of the hard coat, sufficient anti-glare properties cannot be exhibited
The problem of the antireflection film described in JP-A-2001-194504 is that although the hardness and scratch resistance are improved, for example, particles with a weight average particle diameter of about 1.8 μm are added to a film thickness of 20 μm. In the case of left and right anti-glare hard coats, the particles are completely embedded in the above-mentioned anti-glare hard coat, and sufficient anti-glare properties cannot be exhibited
The purpose of the antiglare antireflection film described in JP-A-2001-264508 is to improve scratch resistance, antiglare properties, etc., but the problem is that sufficient hardness cannot be obtained.
Next, in the antiglare hard-coated films of JP-A-11-286083, JP-A-2000-326447, JP-A-2001-194504, JP-A-2001-264508, and JP-A-2003-4903 , when viewed from an oblique direction, there is a problem of so-called oblique white stains in which the scattering of reflected light becomes too strong and white stains are visible

Method used

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  • Hard-coated antiglare film, polarizing plate, image display, and method of manufacturing hard-coated antiglare film
  • Hard-coated antiglare film, polarizing plate, image display, and method of manufacturing hard-coated antiglare film
  • Hard-coated antiglare film, polarizing plate, image display, and method of manufacturing hard-coated antiglare film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Prepare the resin raw material (solid content concentration 66% by weight, manufactured by Dainippon Ink Co., Ltd., trade name: GRANDIC PC1097), which contains the following, (A) component, (B) component, (C) component, light A polymerization initiator and a mixed solvent. In 100 parts by weight of the solid content of the resin raw material, 70 parts by weight of PMMA particles (manufactured by Sekisui Chemical Co., Ltd., trade name: MBX-8SSTN) with a weight average particle diameter of 8 μm and a leveling agent (manufactured by Dainippon Ink Co., Ltd., commercial product) were mixed. name GRANDIC PC-F479) 0.1 parts by weight and mixed. This mixture was diluted with a solvent (ethyl acetate) so that the solid content concentration would be 55% by weight, and an antiglare hard-coat layer forming material was prepared. On a transparent plastic film substrate (triacetyl cellulose film with a thickness of 80 μm, refractive index: 1.48), the above-mentioned antiglare hard-...

Embodiment 2

[0115] Prepare the resin raw material (solid content concentration 66% by weight, manufactured by Dainippon Ink Co., Ltd., trade name: GRANDIC PC1071), which contains the following, (A) component, (B) component, (C) component, light A polymerization initiator and a mixed solvent. In 100 parts by weight of the solid content of this resin raw material, 50 parts by weight of PMMA particles (manufactured by Soken Chemical Co., Ltd., trade name: MX1000) with a weight average particle diameter of 10 μm and a leveling agent (manufactured by Dainippon Ink Co., Ltd., trade name GRANDIC) were mixed. PC4-4133) 0.5 parts by weight and mixed. This mixture was diluted with a solvent (n-butanol) so that the solid content concentration became 35% by weight, thereby preparing an antiglare hard-coat layer forming material. An anti-glare hard-coat film was produced by the same operation and conditions as in Example 1 above except that the above-mentioned anti-glare hard-coat layer forming mater...

Embodiment 3

[0122] The same resin raw material as in Example 2 was used. In 100 parts by weight of the solid content of the resin raw material, 30 parts by weight of PMMA particles (manufactured by Soken Chemical Co., Ltd., trade name: MX1000) with a weight average particle diameter of 10 μm and a leveling agent (manufactured by Dainippon Ink Co., Ltd., trade name GRANDICPC4) were mixed. -4133) 0.5 parts by weight and mixed. The mixture was diluted with a solvent (cellosolve acetate) so that the solid content concentration became 35% by weight to prepare an anti-glare hard-coat layer forming material. An anti-glare hard-coat film was produced by the same operation and conditions as in Example 1 above except that the above-mentioned anti-glare hard-coat layer forming material was used and a #40 bar coater was used. The thickness of the anti-glare hard-coat layer of the anti-glare hard-coat film of this example was 25 micrometers. Almost all of the PMMA fine particles have an aspect ratio...

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Abstract

A hard-coated antiglare film is provided that has high hardness and excellent antiglare properties and can prevent white blur from occurring when viewed from oblique directions. The hard-coated antiglare film of the present invention includes a transparent plastic film substrate and a hard-coating antiglare layer that is formed of fine particles and a hard-coating resin on at least one surface of the transparent plastic film substrate. The hard-coating antiglare layer has a thickness of 15 to 30 mum, the fine particles have a weight average particle size of 30 to 75% of a thickness of the hard-coating antiglare layer, in the unevenness of the hard-coating antiglare layer surface that is formed by the fine particles, an average tilt angle thetaa is 1.0 DEG to 2.0 DEG , and an arithmetic average surface roughness Ra according to JIS B 0601 (1994 version) is 0.12 to 0.30 mum.

Description

technical field [0001] The invention relates to an anti-glare hard-coated film, a polarizer, an image display device and a manufacturing method of the anti-glare hard-coated film. Background technique [0002] In recent years, with the advancement of technology, image display devices have also developed liquid crystal displays (LCDs), plasma displays (PDPs), and electroluminescent displays (ELDs) on the basis of the existing CRT (Cathode RayTube). Make it practical. Among them, as far as LCD is concerned, along with technological innovations related to high field of view, high definition, high-speed response, color reproduction, etc., applications using LCD are also changing from notebook personal computers or monitors to TVs . The basic structure of the LCD is that the glass substrates on the flat plate each equipped with transparent electrodes are arranged to face each other through the spacer so as to form a gap with a certain interval, and the liquid crystal material i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/11G02B1/10G02B1/00G02B5/30G02F1/1335B32B7/02G02B1/118G02B1/14
Inventor 鹰尾宽行滨本大介二宫正纪楠本诚一重松崇之
Owner NITTO DENKO CORP
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