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Method for manufacturing double-sided adhesive sheet for image display device

A technology of image display device and manufacturing method, applied in the direction of identification device, film/sheet adhesive, adhesive, etc., capable of solving problems such as resin overflow, polluted electrodes, wiring, solvent cracks, etc.

Active Publication Date: 2017-02-22
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the case of using a liquid adhesive, although the liquid adhesive can freely flow into the gap for resin sealing, there are problems as follows: it is difficult to obtain the in-plane thickness accuracy in the visible opening surface; During curing, ultraviolet rays do not irradiate the printed back of the protective panel, so that the liquid adhesive contaminates electrodes and wiring in an uncured state, and there is a concern that the uncured liquid resin will corrode the inside of the image display device over time. Solvent cracks in plastic parts, peeling between parts due to curing shrinkage at the cured part
[0009] In addition, in the case of using a thermoplastic adhesive sheet, although the sheet can be heat-melted and sealed, there are concerns about overflow of resin during heating and melting, residual stress due to difference in thermal linear expansion, warping Delamination over time, reduction in tact time due to heating process, storage and transportation temperature management problems when using low-temperature melting materials

Method used

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  • Method for manufacturing double-sided adhesive sheet for image display device
  • Method for manufacturing double-sided adhesive sheet for image display device
  • Method for manufacturing double-sided adhesive sheet for image display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0181] Hereinafter, it demonstrates in more detail using an Example and a comparative example. However, the present invention is not limited thereto.

[0182] First, in order to produce the double-sided pressure-sensitive adhesive sheet of the present invention, a pressure-sensitive adhesive sheet (S-0) was produced by the following production examples.

manufacture example

[0184] Prepare 50 parts by weight of 2-ethylhexyl acrylate (homopolymer Tg (glass transition point of a polymer obtained by polymerizing only 2-ethylhexyl acrylate): -70°C), vinyl acetate (homopolymer Acrylate copolymer A (Mn=65400, Mw=167000, Mw / Mn=2.56) obtained by random copolymerization of 45 parts by weight of Tg+32°C) and 5 parts by weight of acrylic acid (homopolymer Tg+106°C). In 1 kg of this acrylate copolymer A, 70 g of ultraviolet curable resin propoxylated pentaerythritol triacrylate (Shin-Nakamura Industry Co., Ltd. "ATM-4PL") as a crosslinking agent and 4-methyl 15 g of benzophenone was used to prepare a binder resin composition (A-1).

[0185] On the one side of a stretched polyethylene terephthalate film (manufactured by PANAC Co., Ltd., stretched PET film "NP75Z01", thickness 75 μm) that has been treated on one side in a peelable manner, the above-mentioned The adhesive resin composition (A-1) was heat-melted and applied with an applicator to a thickness of 1...

Embodiment 1

[0187] (Preparation of Adhesive Sheet 1)

[0188] The stretched PET film "E7006" was peeled off from the pressure-sensitive adhesive sheet (S-0) produced above, and it became the pressure-sensitive adhesive sheet 1. Table 1 shows the evaluation results of the physical properties of PSA Sheet 1.

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PUM

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Abstract

Provided is a novel double-sided adhesive sheet for image display devices that can adhere closely without gaps to an adherend surface even if the adherend surface to which the adhesive sheet is applied has level differences due to printing, etc. The present invention is a method for manufacturing double-sided adhesive sheets for image display devices to glue together any two adherends selected from surface protection panels, touch panels and image display panels, the method being characterized in that the pre-gluing double-sided adhesive sheet uses an adhesive composition in which the gel fraction is less than 40% and is formed to have the same surface shape as the relief pattern of the gluing surface of the adherend.

Description

technical field [0001] The present invention relates to a double-sided adhesive sheet for image display devices used for image display devices such as liquid crystal display (LCD), organic EL display (OLED), and plasma display (PDP), and for image display devices with a release film A method for producing a double-sided adhesive sheet. Moreover, this invention relates to the image display apparatus which used the said double-sided adhesive sheet for image display apparatuses. Background technique [0002] In recent years, the market for touch-panel image display devices such as smartphones and tablet PCs has grown rapidly, and there are demands for design, fashion, and decoration, and thinner walls, lighter weight, and more diverse colors are being promoted. [0003] For example, in the surface protection panel of an image display device, plastic materials such as an acrylic resin plate and a polycarbonate plate are used together with tempered glass, or printing on the back...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J201/00G09F9/00C09J7/10
CPCC09J201/00G09F9/00C09J7/10C09J7/405C09J7/00C09J2203/318C09J2301/124C09J2423/045C09J2423/105C09J2467/005
Inventor 山本亮太稻永诚新美嘉穗儿
Owner MITSUBISHI CHEM CORP
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