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Method for producing poliarization substrate

A manufacturing method and a technology for polarizing plates, which are applied in polarizing elements, chemical instruments and methods, instruments, etc., can solve problems such as image distortion, and achieve the effect of less defects

Inactive Publication Date: 2009-03-18
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a polarizing plate with such a defect is used in a liquid crystal display device, the image will be distorted at the defective part
Therefore, when the polarizing plate rolled into a roll is cut into a product size suitable for the size of a liquid crystal display device, the defective part is discarded as a defective product.

Method used

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  • Method for producing poliarization substrate

Examples

Experimental program
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Effect test

experiment example 1

[0057] With the polyvinyl alcohol film having an average degree of polymerization of about 2400, a degree of saponification of 99.9% or more, and a thickness of 75 μm in a tense state, it is soaked and swollen in pure water at 30°C, and stretched in the longitudinal direction until stretched. The magnification is 1.3 times. With the polyvinyl alcohol film kept at the above stretch ratio, it was dyed in an aqueous solution containing iodine and potassium iodide (iodine: potassium iodide: water = 0.05:2:100 (weight ratio)) at 30° C. After cross-linking treatment in an aqueous solution containing potassium iodide and boric acid (potassium iodide: boric acid: water = 12:5:100 (weight ratio)) at 54°C and stretching at a total ratio of 5.6 times, in pure water at 12°C Cleaning. Make the polyvinyl alcohol film after cleaning pass through these 3 drying furnaces that temperature is maintained at 65 ℃, 75 ℃ and 85 ℃ successively, be dry under such condition that total residence time is...

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Abstract

The invention provides a method of manufacturing a polarizing plate, over an adhesive layer, a cellulose acetate type resin film is laminated on one surface of a polarized light film made of polyvinyl alcohol type resin, and a cycloolefin type resin film is laminated on the other surface over the adhesive layer, thereby manufacturing the polarizing plate, characterized in that, before laminating the cellulose acetate type resin film and the cycloolefin type resin film, moisture ratio of the polarized light film maintains at more than 8 weight percent, and after laminating the cellulose acetate type resin film and the cycloolefin type resin film, strain keeps less than 600 N / m. The method can restrain defects of the polarizing plate, which is formed through laminating the cellulose acetate type resin film on one surface of the polarized light film made of polyvinyl alcohol type resin over the adhesive layer, and laminating cycloolefin type resin film on the other surface over the adhesive layer.

Description

technical field [0001] The present invention relates to laminating a cellulose acetate-based resin film on one side of a polarizing film made of polyvinyl alcohol-based resin through an adhesive layer, and laminating a cycloolefin-based resin film on the other side through an adhesive layer to produce a polarizing plate. method. Background technique [0002] Generally, a polarizing plate is constituted by laminating a protective film with an adhesive layer on one or both surfaces of a polarizing film formed of a polyvinyl alcohol-based resin adsorbed with an alignment dichroic dye. The polarizing plate is a component of the liquid crystal display device, and is bonded to the liquid crystal cell with an adhesive through other optical films as needed. [0003] The polarizing plate has various structures in order to meet the characteristic requirements of the liquid crystal display device. Usually, the protective film or the optical film arranged on the liquid crystal cell sid...

Claims

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Application Information

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IPC IPC(8): G02B5/30B32B27/12B32B27/06B32B27/08
CPCB32B27/08C08J5/18C08J2301/10C08J2323/02C08J2329/04C08L1/10C08L23/02C08L29/04C08L2203/16G02B5/3033
Inventor 武藤清
Owner SUMITOMO CHEM CO LTD
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