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LCD panel

A liquid crystal panel, liquid crystal display technology, applied in the direction of adhesive types, film/sheet adhesives, instruments, etc., can solve problems such as wide molecular weight distribution, achieve excellent reworkability, inhibit whitening, prevent optical The effect of defects

Active Publication Date: 2016-01-20
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By using such an adhesive layer, although the light leakage is reduced, it is not necessarily sufficient, and the molecular weight distribution is wide, so that foaming occurs under high temperature conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6 and comparative example 1～5

[0291] (a) Preparation of Adhesive Composition

[0292] 0.5 parts of the above silane-based compound (KBM-403) and a crosslinking agent (Coronate L) were mixed with respect to 100 parts of solid content of each of the acrylic resins A to K (20% ethyl acetate solution) obtained in Polymerization Examples 1 to 11 Each amount shown in Table 3 was further added with ethyl acetate so that the solid content concentration would be 13%, to prepare an adhesive composition.

[0293] (b) Preparation of polarizing plate with adhesive layer

[0294] Using an applicator, each adhesive composition prepared in the above (a) was applied to a polyethylene terephthalate film ( The product name "PET3811" (available from Lintec Co., Ltd., called a spacer) was dried at 90° C. for 1 minute on the release-treated surface to prepare a sheet-shaped adhesive layer. Next, one side of a three-layered polarizing plate in which iodine is adsorbed in polyvinyl alcohol and iodine is oriented is interposed bet...

Embodiment 7～11 and comparative example 6～9

[0322] (a) Preparation of Adhesive Composition

[0323] 0.5 parts of the above-mentioned silane-based compound (KBM-403), a crosslinking agent (CoronateL) Each amount shown in Table 4 was mixed, and the amount shown in Table 4 was mixed with the ionic compound (wherein, Example 7 and Comparative Example 8 did not use an ionic compound), and then acetic acid was added so that the solid content concentration was 13%. Ethyl esters to prepare adhesive compositions.

[0324] (b) Preparation of polarizing plate with adhesive layer

[0325] Using an applicator, each adhesive composition prepared in the above (a) was applied to a polyethylene terephthalate film ( The product name "PET3811" (available from Lintec Co., Ltd., called a spacer) was dried at 90° C. for 1 minute on the release-treated surface to prepare a sheet-shaped adhesive layer. Next, one side of a three-layered polarizing plate in which iodine is adsorbed in polyvinyl alcohol and iodine is oriented is interposed bet...

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Abstract

The present invention provides a liquid crystal panel which is obtained through: adhibiting a first polarizing sheet (21) to one surface of a liquid crystal unit (10) through a first adhesive layer (31) with a mode that an absorption axis (21A) is parallel with a long edge (10A) of a liquid crystal unit, and adhibiting a second polarizing sheet (22) to the other surface of the liquid crystal unit (10) through a second adhesive layer (32) with a mode that an absorption axis (22A) is orthogonal with the absorption axis (21A) of the first polarizing sheet. At least one layer selected from the adhesive layers (31,32) is composed of the adhesive composition. The adhesive composition comprises 100 weight parts of acrylic resin (A) and 0.01-5 weight parts of crosslinking agent (B), wherein the acrylic resin is obtained through copolymerizing 80-96% by weight of (methyl)alkyl acrylate, 3-15% by weight of aromatic ring monomer and 0.1-15% by weight of polar functional groups and has 1000,000-2000,000 of weight average molecular weight and 3-7 of molecular weight distribution. The gel fractions of the adhesive layers are set to 60-99wt%. According to the liquid crystal panel, two surfaces of the liquid crystal unit are respectively adhibited with a pair of polarizing sheet through the adhesive layer. The liquid crystal panel can restrain white discharge even when size is enlarged.

Description

technical field [0001] The present invention relates to a liquid crystal panel in which a polarizing plate is pasted on both sides of a glass unit for liquid crystal display via an adhesive layer. Background technique [0002] The polarizing plate is mounted on a liquid crystal display device and is widely used. A transparent protective film is laminated on both sides of the polarizing film, an adhesive layer is formed on the surface of at least one protective film, and a release film is pasted on the adhesive layer. status in circulation. Moreover, a retardation film is laminated|stacked on the polarizing plate of the state which attached the protective film to both surfaces of a polarizing film, and the pressure-sensitive adhesive layer / release film is also stuck on this retardation film side. Before bonding to the liquid crystal cell, the release film is peeled off from these polarizers, and the exposed adhesive layer is bonded to the glass cell for liquid crystal displa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335G02B5/30C09J133/08C09J133/10
CPCC09J7/385C09J133/08G02F1/133528G02F1/13363G02F2202/28
Inventor 太田阳介竹厚流永安智
Owner SUMITOMO CHEM CO LTD
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