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Adhesive layer with separator and manufacturing method thereof, polarizing film with adhesive layer with separator and manufacturing method thereof, and image display device

A technology of an adhesive layer and a manufacturing method, applied in the field of polarizing films, to achieve the effect of excellent processability

Active Publication Date: 2019-04-23
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, image display devices for mobile use such as mobile phones tend to become thinner and lighter as a whole, especially in terms of design and portability.

Method used

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  • Adhesive layer with separator and manufacturing method thereof, polarizing film with adhesive layer with separator and manufacturing method thereof, and image display device
  • Adhesive layer with separator and manufacturing method thereof, polarizing film with adhesive layer with separator and manufacturing method thereof, and image display device
  • Adhesive layer with separator and manufacturing method thereof, polarizing film with adhesive layer with separator and manufacturing method thereof, and image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0152] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited to these examples. Parts and % in each example are based on weight.

[0153]

[0154] The weight-average molecular weight of the hydroxyl group-containing (meth)acrylic polymer (A) is measured by GPC (gel permeation chromatography). Analytical device: HLC-8120GPC manufactured by Tosoh Corporation; column: G7000HXL+GMHXL+GMHXL manufactured by Tosoh Corporation; column dimensions: 7.8mmφ×30cm each, 90cm in total; column temperature: 40°C; flow rate: 0.8ml / min; injection volume: 100μl; eluent: tetrahydrofuran; detector: differential refractometer (RI); standard sample: polystyrene

[0155]

[0156] In order to produce a thin polarizer, first, a laminate formed by forming a PVA layer with a thickness of 9 μm on an amorphous PET substrate is assisted in stretching in an air atmosphere at a stretching temperature of 130°C to form a stretche...

manufacture example 1

[0164]

[0165] Add 99 parts of butyl acrylate, 1 part of 4-hydroxybutyl acrylate (HBA), and 100 parts of monomer (solid content) to a reaction vessel with a cooling pipe, nitrogen gas introduction pipe, thermometer and stirring device together with ethyl acetate. Parts are 1 part of AIBN as an initiator, reacted at 60° C. for 7 hours under a nitrogen stream, and then added ethyl acetate to the reaction solution to obtain a hydroxyl-containing (meth)acrylic acid with a weight average molecular weight of 1.6 million. A solution of a polymeroid (A-1) (solid content concentration: 30% by weight). Table 2 shows the compounding and molecular weight of the (meth)acrylic polymer (A-1).

manufacture example 2

[0167]

[0168] ( A solution of a meth)acrylic polymer (A-2). Table 2 shows the compounding and molecular weight of the (meth)acrylic polymer (A-2).

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PUM

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Abstract

The present invention provides a pressure-sensitive adhesive layer with a separator, which has moderate light peelability between the separator and the pressure-sensitive adhesive layer, and is excellent in processability and durability, and a method for producing the same. The manufacturing method of the adhesive layer with separator includes: forming an adhesive agent containing (meth)acrylic polymer, peroxide and phenolic antioxidant on the peeled surface of the separator that has undergone peeling treatment. a first step of forming a composition layer; and a second step of forming an adhesive layer by heating the adhesive composition to crosslink after the first step.

Description

technical field [0001] The present invention relates to an adhesive layer with a separator, a method for producing the same, a polarizing film with an adhesive layer with a separator, and a method for producing the same. Furthermore, the present invention relates to image display devices such as liquid crystal display devices, organic EL display devices, and PDPs using the polarizing film with an adhesive layer with a separator. Background technique [0002] Image display devices and the like must arrange polarizing elements on both sides of the liquid crystal cell due to their image forming methods, and generally stick a polarizing film. When affixing the above-mentioned polarizing film to a liquid crystal cell, an adhesive is usually used. In addition, since the bonding of the polarizing film and the liquid crystal cell generally reduces light loss, the materials are closely bonded using an adhesive. In this case, since there is no need for a drying process when the pola...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/22C09J7/38B32B27/30C09J11/06C09J133/00C09J133/06C09J133/14G02B5/30G02F1/1335C09J7/10
CPCB32B27/30C09J133/06G02B5/305C08K5/13C08K5/14B32B7/12B32B2307/42B32B2307/734B32B2457/202C09J2203/318C08K5/005C09J7/38C09J7/22G02B1/14C09J2433/00G02B5/3033C09J2301/408C09J7/10C08L33/06C09J2301/302C09J5/06G02F1/133528
Inventor 喜多川丈治木田友树秋月伸介保井淳外山雄佑石井孝证
Owner NITTO DENKO CORP
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