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Polarizer-protecting film, and polarizing plate and image display device each comprising polarizer-protecting film

一种保护膜、偏振片的技术，应用在偏振元件、运输和包装、化学仪器和方法等方向，能够解决产生粘连等问题，达到防止褶皱、卷取性优异、抑制粘连的效果

Inactive Publication Date: 2011-06-29
NITTO DENKO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of winding up the polarizer protective film provided with the easily bonding layer into a roll, there is a problem of blocking.

Method used

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  • Polarizer-protecting film, and polarizing plate and image display device each comprising polarizer-protecting film
  • Polarizer-protecting film, and polarizing plate and image display device each comprising polarizer-protecting film
  • Polarizer-protecting film, and polarizing plate and image display device each comprising polarizer-protecting film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] (production of polarizer)

[0111]A polyvinyl alcohol film having a thickness of 75 μm was immersed in warm water at 28° C. for 60 seconds to swell. Next, it is dipped in an aqueous solution containing iodine and potassium iodide (weight ratio 1:10), stretched to 3.3 times, and dyed so as to achieve a predetermined monomer transmittance. Then, immerse in an aqueous solution containing 3% by weight of boric acid and 2% by weight of potassium iodide for 10 seconds, and stretch in an aqueous solution containing 4% by weight of boric acid and 3% by weight of potassium iodide at 60°C to make the stretching ratio The total is 6.0 times. Then, the obtained stretched film was immersed in an aqueous solution containing 5% by weight of potassium iodide for 10 seconds, and dried in an oven at 40° C. for 3 minutes to obtain a polarizing plate with a thickness of 30 μm.

[0112] (Production of (meth)acrylic resin film)

[0113] Will [have the following general formula (1) in R 1...

Embodiment 2

[0128] A polarizing plate was produced in the same manner as in Example 1 except that the compounding amount of colloidal silica was 0.32 g at the time of preparation of the easily adhesive composition.

Embodiment 3

[0130] A polarizing plate was produced in the same manner as in Example 1, except that the compounding quantity of colloidal silica was 0.21 g and the compounding quantity of pure water was 76.7 g at the time of preparation of an easy-adhesive composition.

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PUM

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Abstract

Disclosed is a polarizer-protecting film which rarely causes blocking during the take-up of the film and thereby has excellent take-up properties. The polarizer-protecting film comprises a (meth)acrylic resin film and a highly adhesive layer composed of a highly adhesive agent composition comprising a urethane resin and microparticles. Preferably, the microparticles comprise colloidal silica.

Description

technical field [0001] The present invention relates to a polarizer protective film, a polarizing plate using the polarizer protective film, and an image display device. More specifically, this invention relates to the polarizer protective film which can suppress the blocking which arises at the time of winding. Background technique [0002] In a liquid crystal display device, which is a typical image display device, it is essential to arrange polarizing plates on both sides of a liquid crystal cell due to its image forming method. A polarizing plate is usually formed by attaching a polarizing plate protective film to both surfaces of the polarizing plate with an adhesive. Acrylic resin films have been proposed as forming materials for polarizer protective films. Moreover, in order to improve the adhesiveness of a polarizer and an acrylic resin film, it is proposed to provide an easily bonding layer between a polarizer and an acrylic resin film (for example, patent documen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30B32B27/00B32B27/30B32B27/40G02F1/1335
CPCB32B7/12G02B5/305G02B5/3025B32B27/30G02F2201/50B32B27/20B32B27/40B32B27/08G02F2202/28G02F1/133528Y10T428/25Y10T428/2896G02B5/30G02F1/1335
Inventor 山崎达也齐藤武士鹰尾宽行杉野洋一郎山下裕司
Owner NITTO DENKO CORP
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