Laminate, composite polarizing plate and image display device

A composite polarizing and laminated body technology, which is applied in the direction of polarizing elements, lighting devices, layered products, etc., can solve the problems of transparent conductive layer corrosion without countermeasures, and achieve the effect of less change in resistance value

Inactive Publication Date: 2020-10-30
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In Patent Document 2, the corrosion of the transparent conductive layer is also studied, and improvement is confirmed, but no countermeasures are proposed for the corrosion of the transparent conductive layer in a high-temperature and high-humidity environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0186] Hereinafter, although an Example is given and this invention is demonstrated further concretely, this invention is not limited to these examples. In the examples, parts and % indicating content or usage-amount are based on weight unless otherwise indicated. In addition, the measurement of each physical property in the following example was performed by the following method.

[0187] (1) Determination of thickness:

[0188] Measurement was performed using a digital micrometer "MH-15M" manufactured by Nikon Corporation.

[0189] (2) Determination of moisture permeability of adhesive layer

[0190] A triacetyl cellulose film (TAC film, thickness: 25 μm, manufactured by Konica Minolta Co., Ltd.) was bonded to the adhesive surface of the adhesive sheet (thickness of the adhesive layer: 50 μm) used in the examples. Thereafter, the release film of the pressure-sensitive adhesive sheet was peeled off to obtain a sample for measurement. Then, using this measurement sample, t...

manufacture example 1

[0195] [Manufacturing example 1] Production of polarizing film

[0196] A polyvinyl alcohol film with a thickness of 30 μm (the average degree of polymerization is about 2400, and the degree of saponification is more than 99.9 mol%) is uniaxially stretched to about 4 times by dry stretching. After immersion in water for 40 seconds, it was immersed in an aqueous solution having a weight ratio of iodine / potassium iodide / water of 0.052 / 5.7 / 100 at 28° C. for 30 seconds to perform a dyeing process. Thereafter, it was immersed in an aqueous solution having a weight ratio of potassium iodide / boric acid / water of 11.0 / 6.2 / 100 at 70° C. for 120 seconds. Next, after washing with pure water at 8°C for 15 seconds, it was dried at 60°C for 50 seconds and then at 75°C for 20 seconds while maintaining a tension of 300 N. A polarizing film with a thickness of 12 μm.

manufacture example 2

[0197] [Manufacturing example 2] Production of rubber-based adhesive 1

[0198] 100 parts by weight of polyisobutylene (trade name: OPPANOL B80, Mw: about 750,000, manufactured by BASF Corporation) and tricyclodecane bis(tricyclodecane) as a polyfunctional radical polymerizable compound were adjusted so that the solid content was 15% by weight. Methanol diacrylate (trade name: NK Ester A-DCP, bifunctional acrylate, molecular weight: 304, manufactured by Shin-Nakamura Chemical Industry Co., Ltd.) 10 parts by weight, benzophenone ( A rubber-based adhesive 1 (solution) was prepared using a toluene solution (adhesive solution) of 0.5 parts by weight of Wako Pure Chemical Industries, Ltd. and 10 parts by weight of perhydroterpene phenol.

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PUM

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Abstract

The purpose of the present invention is to provide a laminate in which the rate of change of resistance of a transparent conductive layer is small even in a high-temperature and high-humidity environment. In addition, another purpose of the present invention is to provide a composite polarizing plate and an image display device employing said laminate. The present invention provides a laminate characterized in that a transparent conductive layer and a pressure-sensitive adhesive layer having a moisture permeability of 100 g/(m2*day) or less, at a temperature of 40 DEG C and a relative humidityof 92%R.H., are laminated in contact with each other. It is preferable that the pressure-sensitive adhesive layer be a rubber-based adhesive or a polyolefin-based adhesive.

Description

technical field [0001] The present invention relates to a laminate, a composite polarizing plate, and an image display device. Background technique [0002] In recent years, the popularization of mobile phones, tablet terminals, etc. has advanced, and liquid crystal display devices and organic EL display devices (OLEDs) have come to be widely used as image display devices. Among them, the number of image display devices having a touch panel function is increasing. In such an image display device, the adhesive layer is often placed in direct contact with the transparent conductive layer of the touch panel, and the adhesion and durability between the transparent conductive layer and the adhesive layer are considered to be particularly important. . [0003] In order to solve this problem, Patent Document 1 discloses a technique of using an adhesive layer formed of an adhesive composition in which only a silane compound having an epoxy group is blended. As a silane coupling a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/023B32B7/12B32B27/00B32B33/00B32B15/02B32B15/04C09J11/06C09J123/10C09J123/22C09J7/38G02B5/30H01L27/32H05B33/02H05B33/14
CPCB32B7/12C09J123/22C09J11/06C09J123/12B32B7/023G02B5/30H05B33/02H05B33/14C09J2301/312H10K59/00
Inventor 松本寿和
Owner SUMITOMO CHEM CO LTD
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