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Transparent adhesive film for protecting liquid crystal polarization plate

A polarizing plate and transparent film technology, used in optics, adhesives, optical components, etc., can solve problems such as floating, contaminated surface treatment, obstacles, etc., and achieve the effect of good peelability and excellent adhesion

Inactive Publication Date: 2004-05-19
OJI PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, for silicone-based release agents, although the peeling force from the protective adhesive film can be designed to be very light, there is a problem of floating when the liquid crystal polarizer is attached due to the movement of silicone to the adhesive layer, and there are also problems. High temperature is applied to sufficiently cure the silicone, and the film thermally shrinks, causing problems in surface treatment due to contamination on the surface of the liquid crystal polarizer (for example, see Patent Document 4)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The base material is a biaxially stretched polyethylene terephthalate (PET) film (trade name "T-100C", manufactured by Mitsubishi Chemical Polyester Film Co., Ltd., with a thickness of 25 microns and a total light transmittance of 88%. , haze value 3.0%), coated with an antistatic agent (trade name "Microsolva-Rmd142", manufactured by Solpex Co., Ltd.) with a mass ratio of tin oxide / polyester resin of 2 / 1 with a fine gravure coater , tin oxide average particle size 20nm, fluorine-containing additives), so that the dry mass is 0.3g / m 2 , Dry at 100°C for 30 seconds to form an antistatic layer.

[0070] On this antistatic layer, as a thermosetting resin, 100 parts (in terms of solid content) of a silicone hard coat agent (trade name "SHC900", manufactured by GE Toshiba Silicone Co., Ltd., 30% solid content) was mixed without reaction Type silicone (trade name "BY-24-842ADDITIVE", manufactured by Toritsu Douko-Ning Silicone Co., Ltd., solid content 50%) 1 part (converted ...

Embodiment 2

[0074] A liquid crystal was produced in the same manner as in Example 1, except that an antistatic agent having a mass ratio of tin oxide / polyester resin of 1 / 1 (trade name "Micro Solva-Rmd112", manufactured by Solbex Co., Ltd.) was used as the antistatic agent. Transparent adhesive film for polarizer protection.

Embodiment 3

[0076] Same as Example 1, except that 4 parts of non-reactive silicone (trade name "BY-24-842 ADDITIVE", manufactured by Toritsu Douko-Ning Silicone Co., Ltd., 50% of solid content) was used , Production of transparent adhesive film for liquid crystal polarizer protection.

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Abstract

Provided is a transparent adhesive film having excellent static electric resistant, breaking-resistant and contamination-resistant properties and possible to conduct fluoroscopic examination for defects of liquid crystal polar panel. The transparent film comprises a biaxial drawing transparent film; static electric-resistant layer and breaking-resistant layer laminated on one side of the biaxial film; and removable adhesive layer formed on the other side of the film. The static electric-resistant layer comprises 40-80 wt.% of tin oxide(II) and 60-20 wt.% of polyester resin. The breaking-resistant layer comprises curable resin layer such as thermosetting silicone resin. The adhesive layer comprises two-solution type curable urethane adhesive containing urethane adhesive cross-linked by polyisocyanate cross-linking agent.

Description

technical field [0001] The present invention relates to an adhesive film for protecting a liquid crystal polarizing plate used in a liquid crystal display device, that is, a transparent adhesive film for protecting a liquid crystal polarizing plate that is directly attached to a liquid crystal polarizing plate and is capable of see-through inspection. Background technique [0002] In liquid crystal polarizers used in liquid crystal display devices, damage, contamination, and adhesion of foreign matter are fatal defects. Therefore, in the manufacturing process, distribution process and assembly process of the liquid crystal polarizing plate, in order to prevent the liquid crystal polarizing plate from being damaged, polluted or foreign matter attached, it is usually taken to stick a protective adhesive film on the surface of the liquid crystal polarizing plate. The liquid crystal polarizing plate attached with the protective adhesive film is inspected for defects before being...

Claims

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Application Information

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IPC IPC(8): C08J7/04B32B27/00G02B5/30G02F1/1335
CPCB32B7/06B32B27/08C08J5/18C08J2323/02C08L23/02C08L2201/10C09D183/04C09J175/04G02B1/14
Inventor 大桥隆荒木哲夫
Owner OJI PAPER CO LTD
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