Optical laminated body and manufacturing method thereof

A technology of optical laminates and adhesive layers, applied in chemical instruments and methods, optics, nonlinear optics, etc., can solve problems such as peeling of polarizing plates, cracking of polarizing films, and inability to reuse liquid crystal cells, etc., to achieve adhesion Good, thickness-reducing effect

Active Publication Date: 2016-08-10
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when the polarizing plate is bonded to the liquid crystal cell substrate by means of the adhesive disclosed in this document, in a heat resistance test or a thermal shock test, although no major problem is found in a small-sized liquid crystal cell, However, when made into a liquid crystal cell of medium to large size, there are problems such as peeling of the polarizing plate from the surface of the liquid crystal cell substrate or cracking of the polarizing film
In addition, although it is possible to achieve thinning of an optical laminate obtained by bonding a polarizing plate to a liquid crystal cell substrate using this adhesive, it cannot be easily applied to a polarizing plate temporarily bonded to a liquid crystal cell. strip it off
For this reason, if some unsuitability is found in the inspection after lamination, the liquid crystal cell cannot be reused without a process such as treatment with a special organic solvent, and there is no economic advantage.

Method used

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  • Optical laminated body and manufacturing method thereof
  • Optical laminated body and manufacturing method thereof
  • Optical laminated body and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0144] (a) Preparation of polyvinyl alcohol-based adhesive composition

[0145] Acetoacetyl-modified polyvinyl alcohol with a saponification degree of 99.1 mol% (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "Gohsefimer Z-200", the viscosity of a 4% aqueous solution is 12.4 mPa·sec) was dissolved in pure In water, make a concentration of 10% aqueous solution. In this aqueous solution of acetoacetyl-modified polyvinyl alcohol, mix glyoxal as a crosslinking agent and 3-glycidoxypropyltrimethoxysilane as a silane coupling agent to modify the acetoacetyl group Polyvinyl alcohol: crosslinking agent: the solid component weight ratio of silane coupling agent is 1: 0.5: 0.1, further dilutes with pure water so that the acetoacetyl modified polyvinyl alcohol is 3 parts with respect to 100 parts of water, thereby Prepare an adhesive composition.

[0146] (b) Preparation of optical laminated body

[0147] A polarizing plate was prepared in which a protective ...

Embodiment 2

[0149] The crosslinking agent was changed to methylol melamine, and other operations were performed in the same manner as in (a) of Example 1 to prepare an adhesive composition. An optical layered body was produced by the method similar to (b) of Example 1 using this composition.

Embodiment 3～21

[0151] As polyvinyl alcohol, in addition to "Gohsefimer Z-200" shown in Example 1 (abbreviated as "Z-200" in Table 1 below), the following were used. In Table 1 below, the following items are represented by the symbols shown at the top, respectively.

[0152] T-330: anionized polyvinyl alcohol having a degree of saponification of 96.5 mol% (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "Gohsenol T-330", viscosity of 4% aqueous solution: 30.0 mPa·sec).

[0153] KL-318: anion-modified polyvinyl alcohol having a degree of saponification of 87.5 mol% (manufactured by Kuraray Japan, trade name "KL-318", viscosity of 4% aqueous solution is 25.0 mPa·sec).

[0154] Z-100: Acetoacetyl-modified polyvinyl alcohol with a saponification degree of 99.2 mol% (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "Gohsefimer Z-100", the viscosity of a 4% aqueous solution is 5.2 mPa·sec) .

[0155] Z-210: Acetoacetyl-modified polyvinyl alcohol wi...

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Abstract

The invention provides an optical laminate (10) in which a glass plate (1) and a plastic sheet (3) are attached by an adhesive layer (2) formed by an adhesive composition containing polyvinyl alcohol-based resin. The optical laminate (10) can be manufactured by the following steps: (a) an adhesive composition layer forming process for disposing an aqueous solution adhesive layer containing polyvinyl alcohol-based resin on an attached surface of the glass plate (1) and / or an attached surface of the plastic sheet (3); (b) an attaching process for attaching the glass plate (1) and the plastic sheet (3) by the adhesive layer; (c) a checking process for checking the attached product and taking out the attached product with checked defects from a production line; and (d) a curing process for curing the adhesive layer in the attached product without checked defects.

Description

technical field [0001] The present invention relates to an optical laminate suitable for a liquid crystal display device. More specifically, it relates to a method for laminating a glass plate with an adhesive layer on a glass plate represented by a liquid crystal cell substrate which is a central part of a liquid crystal display device. An optical laminate obtained by laminating plastic sheets represented by polarizing plates. In addition, the present invention also relates to methods that can be used to manufacture the optical laminate. Background technique [0002] A polarizing plate is useful as an optical component constituting a liquid crystal display device. As a polarizing plate, a polarizing plate in which a protective layer made of a transparent resin film is laminated on one or both sides of a polarizing film made of a polyvinyl alcohol-based resin via an aqueous adhesive or the like is generally used. As such a transparent resin film, a triacetyl cellulose film...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B17/10B32B27/06B32B27/30B32B7/12B32B37/12
CPCC08J5/18G02B1/04G02F1/133305G02F1/133528
Inventor 竹厚流藤长将司阪上智惠
Owner SUMITOMO CHEM CO LTD
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