Optical film and method for production thereof

A technology for optical films and manufacturing methods, which is applied to optical elements, flat products, other household appliances, etc., can solve the problems of film quality deterioration and transport roller pollution, and achieve the effect of reducing pollution and fully cleaning the rollers.

Inactive Publication Date: 2009-07-22
KONICA MINOLTA OPTO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The melt casting film-making method is more preferable from the above point of view, but the resin or additives that are thermally decomposed during film production adhere to the conveying roller, making the conveying roller contaminated, and then as the contamination progresses, the contamination on the film is transferred and becomes spots. There is a disadvantage of deteriorating the quality of the film due to uneven shape or unevenness

Method used

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  • Optical film and method for production thereof
  • Optical film and method for production thereof
  • Optical film and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0281] Example 1 (production of sample 101)

[0282] 100 parts by mass of cellulose acetate propionate

[0283] (The degree of substitution of the acetyl group is 1.4, the degree of substitution of the propionyl group is 1.35,

[0284] The number-average molecular weight is 60,000, and the method for determining the degree of substitution of acyl groups such as acetyl, propionyl, butyryl is determined according to the provisions of ASTM-D817-96).

[0285] additive

[0286] Trimethylolpropane tribenzoate (plasticizer, melting point 85°C) 10 parts by mass

[0287] (IRGANOX XP 420 / FD stabilizer, manufactured by Chiba Specialty Chemicals Co., Ltd.) 1 part by mass

[0288] Ultraviolet absorber Ti928 (manufactured by Chiba Specialty Chemicals Co., Ltd.) 1.5 parts by mass

[0289] Matting agent (seaposter KEP-30: manufactured by Nippon Shokubai Co., Ltd., silica fine particles with an average particle diameter of 0.3 μm) 0.1 parts by mass

[0290] After mixing the above material...

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Abstract

Disclosed is a method for producing an optical film having a satisfactory roll-cleaning effect at low cost. Also disclosed is an optical film which can be produced by the method and is less likely to be stained. The method comprises the steps of: pressing a film between a first revolution body and a second revolution body, conveying the film with a third revolution body, and stretching the film, wherein the film is a film-like cellulose resin, the temperature of the cellulose resin during being pressed between the first and second revolution bodies is higher than the melting temperature of an additive, and the line pressure to be employed for the pressing between the first and second revolution bodies is 0.1 to 100 N / mm.

Description

【Technical field】 [0001] The present invention relates to optical film and its manufacturing method. 【Background technique】 [0002] The present invention is an optical film with high planarity produced by a melt casting method, especially a protective film for a polarizing plate used in a liquid crystal display device, a retardation film, a viewing angle expansion film, and a protective film used in a plasma display. Various functional films such as reflective films, optical films that can also be used in various functional films used in organic EL displays, etc., and their production methods. [0003] Compared with the conventional CRT display device, the liquid crystal display device can be widely used as a monitor because it saves space and energy. Furthermore, it is widely used for TVs, and various optical films such as polarizing films and retardation films are used in such liquid crystal display devices. However, the polarizing film of the polarizing plate used in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/14B29C47/92B29K1/00B29L7/00B29L11/00B29C48/08B29C48/305B29C48/92
CPCB29C47/0019B29K2001/00B29K2001/12B29K2105/256B29C47/8845B29C47/14B29C48/92B29C2948/92704B29C48/07B29C48/08B29C48/305B29C48/914B29C48/9155B29C2948/92523B29C2948/92923C09K2323/00B29L2011/00
Inventor 日置克彦
Owner KONICA MINOLTA OPTO
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