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Optical film, polarizer, image display device and method for manufacturing optical film

A manufacturing method and technology of optical films, which are applied in the fields of polarizers, retardation films, liquid crystal panels, and liquid crystal display devices, can solve the problems of curling or dimensional changes becoming larger, and the appearance of curling being deteriorated.

Inactive Publication Date: 2013-11-13
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] However, if this kind of film is produced by the existing method, the following new problem becomes obvious: when the film is stored for a long time or heated or humidified and heated, the dimensional change is larger than before, so for example, the roll The appearance deteriorates with time; or when such a film is used as a protective film for polarizing plate processing, peeling or concentric circle (record) stripe-like unevenness and curling occurs on the obtained polarizing plate; When the polarizing plate of the film is heated or humidified and heat-treated, curling or dimensional change becomes large

Method used

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  • Optical film, polarizer, image display device and method for manufacturing optical film
  • Optical film, polarizer, image display device and method for manufacturing optical film
  • Optical film, polarizer, image display device and method for manufacturing optical film

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preparation example Construction

[0398] The preparation of the dopant solution of the present invention is not particularly limited to its dissolution method, and it can be carried out at room temperature, further utilizing a cooling dissolution method or a high temperature dissolution method, and a combination of these methods. Regarding the preparation of the dopant solution in the present invention, and then the steps of concentration and filtration of the solution accompanied by the dissolution step, it is preferred to use the "Technical Report of the Invention Association" (public technical number 2001-1745, issued on March 15, 2001) , Invention Association) detailed manufacturing steps described on pages 22 to 25.

[0399] (casting, drying, coiling steps)

[0400] Hereinafter, a method for producing a film using a dopant solution of the present invention will be described. The method and equipment for manufacturing the optical film of the present invention can use the solution casting film forming meth...

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Abstract

The invention provides an optical film, a polarizer, an image display device and a method for manufacturing an optical film. The optical film of the invention comprises one or more than two additives and cellulose ester, wherein the total content of the additives (Ct, unit: relative to mass% of the abovementioned cellulose ester) and the film thickness (d, unit: [mu]m) meet the relation of Ct<30 and Ct / d>=0.375, and the dimensional change rate is less than 3% under 90%RH treatment at 60 DEG C for 24 hours. The dimensional change rate is an absolute value of a value obtained by dividing dimensional change by an initial length as the optical film is subjected to standing under 90%RH treatment at 60 DEG C for 24 hours.

Description

technical field [0001] The present invention relates to an optical film comprising cellulose ester that has excellent adhesion to a polarizing film and can be directly bonded to a polarizing film, and a method for producing the same. In addition, it relates to a retardation film using the optical film, and further relates to using the polarizing film. Polarizing plates, liquid crystal panels, and liquid crystal display devices with excellent optical film and high reliability. Background technique [0002] Polymers represented by cellulose esters, polyesters, polycarbonates, cycloolefin polymers, vinyl polymers, and polyimides are used in silver halide photographic photosensitive materials, retardation films, polarizing plates, and image display devices membrane. Films more excellent in planarity and uniformity can be produced from these polymers, and thus are widely used as films for optical applications. [0003] Among these films, an optical film comprising cellulose acy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04G02B5/30G02F1/1335
CPCB32B27/08C08J5/18C08J2301/08C08L1/08G02B1/04G02B5/305G02B5/3083G02F1/133528G02F1/13363
Inventor 佐佐田泰行加藤盛孝铃木亮
Owner FUJIFILM CORP
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