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Protection sheet and polarizing plate

A protection sheet, disperse phase technology, applied in optics, optical elements, polarizing elements, etc., can solve problems such as inconvenience

Active Publication Date: 2012-05-09
KEIWA INCORPORATED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This shows that above-mentioned existing liquid crystal display device obviously still has inconvenience and defect in structure and use, and urgently needs to be further improved

Method used

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  • Protection sheet and polarizing plate
  • Protection sheet and polarizing plate
  • Protection sheet and polarizing plate

Examples

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Effect test

Embodiment 1

[0106] Hereinafter, the present invention will be specifically described based on the examples of the present invention, but the present invention is not limited to these examples.

[0107] Add acrylic rubber and ultraviolet absorber to the heat-resistant acrylic resin, use the extruder of the T-die device, and adjust the number of revolutions of the screw, the temperature of the resin in the cylinder (cylinder) of the extruder, and the T-die (T-die) temperature extruded to obtain a variety of protective sheets. As the ultraviolet absorber, TINUVIN360 and TINUVIN1577 manufactured by BASF Japan Co., Ltd., and SEESORB707 and SEESORB709 manufactured by Shipro Chemical Co., Ltd. were used. Various types of protective sheets with a thickness of 40 μm were obtained by using one or two of the above-mentioned four kinds of ultraviolet absorbers and changing the addition amount with respect to 100 parts by mass of the heat-resistant acrylic resin. The transmittances Tt (%) of light ra...

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Abstract

The present invention relaets to a protection sheet which has an island structure that comprises heat-resistant acrylic resin as a matrix phase of the main polymer and comprises acrylic rubber as a disperse phase of the main polymer. The matrix phase comprises an ultraviolet ray absorbing agent which is a compound that simultaneously comprises phenolic hydroxyl and branched alkyl with 4-12 carbons or straight-chain alkoxyl with 4-12 carbon atoms. The invention aims to provide the protection sheet which has the following advantages: high heat resistance, high ultraviolet ray absorbing capability and high flexibility.

Description

technical field [0001] The invention relates to a protective sheet and a polarizing plate, in particular to a protective sheet and a polarizing plate with high heat resistance, high ultraviolet absorption capacity and high flexibility. Background technique [0002] In recent years, liquid crystal display devices have been widely used instead of CRTs because they are thin, light, and consume little power. Specifically, liquid crystal display devices are widely used from small items such as calculators and clocks to large items such as measuring instruments for automobiles, PC screens, and televisions. [0003] A liquid crystal display module incorporated in a liquid crystal display device includes a liquid crystal cell (liquid crystal cell) and a pair of polarizing plates arranged on both sides of the liquid crystal cell. The polarizing plate includes a sheet-shaped polarizing component and a pair of protective sheets disposed on both sides of the polarizing component. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04C08L33/00C08K5/00C08K5/3475C08K5/3492C08K5/132C08K5/134G02B5/30
CPCC08J5/18B29D7/01B32B27/08G02B5/3033G02B1/14C08L33/12C08J2333/12C08L2203/162C08L2201/02C08L2201/10B29C48/0018
Inventor 峯尾裕
Owner KEIWA INCORPORATED
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