Polarizing film with adhesive layer and image display device

An adhesive layer, polarizing film technology, applied in the direction of adhesive type, ester copolymer adhesive, film/sheet adhesive, etc., to prevent abnormal appearance

Active Publication Date: 2019-01-22
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, in recent years, in mobile image display devices such as mobile phones, there is a tendency to reduce the weight of the entire module especially from the viewpoint of design and portability.

Method used

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  • Polarizing film with adhesive layer and image display device
  • Polarizing film with adhesive layer and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0128] The following examples illustrate the present invention in detail, but the present invention is not limited by these examples. In addition, the parts and % in each example are based on weight.

[0129]

[0130] The weight-average molecular weight of the hydroxyl group-containing (meth)acrylic polymer (A) is measured by GPC (gel permeation chromatography).

[0131] ・Analyzer: HLC-8120GPC manufactured by Tosoh Corporation

[0132] ・Pillar: Made by Tosoh Corporation, G7000H XL +GMH XL +GMH XL

[0133] ・Column size: 7.8mmφ×30cm each, 90cm in total

[0134] ·Column temperature: 40℃

[0135] ·Flow: 0.8ml / min

[0136] ·Injection volume: 100μl

[0137] ·Eluent: tetrahydrofuran

[0138] Detector: Differential refractometer (RI)

[0139] ·Standard sample: polystyrene

[0140]

[0141]In order to produce a thin polarizer, first, a laminate having a 9 μm-thick PVA layer formed on an amorphous PET substrate is subjected to in-air auxiliary stretching at a stretching t...

manufacture example 1

[0151]

[0152] In a reaction vessel equipped with a condenser tube, a nitrogen gas introduction tube, a thermometer, and a stirring device, 99 parts of butyl acrylate, 1 part of 4-hydroxybutyl acrylate (HBA), and 1 part of 4-hydroxybutyl acrylate (HBA), and ) 100 parts of AIBN as an initiator was reacted at 60°C for 7 hours under a nitrogen stream, and then ethyl acetate was added to the reaction solution to obtain a hydroxyl-containing (methyl ) acrylic polymer (A-1) (solid content concentration: 30% by weight). Table 2 shows the composition and molecular weight of the (meth)acrylic polymer (A-1).

manufacture example 2

[0154]

[0155] In Production Example 1, except that a monomer mixture containing 99 parts of butyl acrylate and 1 part of 2-hydroxyethyl acrylate (HEA) was used as the monomer mixture, the weight average molecular weight was prepared in the same manner as in Production Example 1. 1.6 million solution of (meth)acrylic polymer (A-2). Table 2 shows the composition and molecular weight of the (meth)acrylic polymer (A-2).

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Abstract

The present invention provides a polarizing film with an adhesive layer that prevents appearance abnormality at the edge of the polarizing film, which is a unique problem when reducing the thickness of the polarizing film. A polarizing film with an adhesive layer comprising: a polarizing film having a transparent protective film on at least one side of a polarizer and having a total thickness of 100 μm or less; and an adhesive layer containing a (meth)acrylic polymer , wherein the adhesive layer contains an antioxidant. The adhesive layer of the polarizing film with an adhesive layer preferably contains a crosslinking agent, and the crosslinking agent is preferably at least one of a peroxide and an isocyanate-based crosslinking agent.

Description

technical field [0001] The present invention relates to a polarizing film with an adhesive layer. Furthermore, the present invention relates to image display devices such as liquid crystal display devices, organic EL display devices, and PDPs using the above-mentioned polarizing film with an adhesive layer. Background technique [0002] For image display devices and the like, it is essential to arrange polarizing elements on both sides of the liquid crystal cell due to the image forming method, and usually a polarizing film is attached. When affixing the said polarizing film to a liquid crystal cell, an adhesive is used normally. In addition, bonding of a polarizing film and a liquid crystal cell generally reduces light loss, so various materials are bonded together using an adhesive. In this case, there are advantages such as the drying process that does not need to fix the polarizing film, so usually use a polarizing film with an adhesive layer that is previously provide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/20C09J133/08C09J11/06G02B5/30G02F1/1335
CPCC08K5/005C08K5/13C09J133/066C09J2203/318C09J2433/00C09J7/385C09J2301/408C09K2323/05C09K2323/057C09K2323/059G02F1/133528G02F2202/28Y10T428/263Y10T428/265Y10T428/2891C08F220/1804C08F220/20C08F220/06B32B2457/20B32B2457/202B32B2457/204B32B2457/206C09J133/08C09J133/10C09J2301/302
Inventor 秋月伸介保井淳外山雄祐石井孝证
Owner NITTO DENKO CORP
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