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Double-surface adhesion sheet, display member and manufacturing method of display member

An adhesive sheet and display technology, applied in the directions of adhesives, adhesive types, ester copolymer adhesives, etc., can solve problems such as step difference and light reflection loss, and achieve the effect of excellent step followability and good processability.

Pending Publication Date: 2017-09-29
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the display module side of the protective panel, frame-shaped printed layers may exist in steps
If the adhesive layer does not follow the step, the adhesive layer floats near the step, so light reflection loss occurs

Method used

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  • Double-surface adhesion sheet, display member and manufacturing method of display member
  • Double-surface adhesion sheet, display member and manufacturing method of display member
  • Double-surface adhesion sheet, display member and manufacturing method of display member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0182] (1) Preparation of a laminate having a first adhesive layer or a second adhesive layer

[0183] (1-1) Preparation of (meth)acrylate polymer (A)

[0184] 65 parts by mass of 2-ethylhexyl acrylate, 5 parts by mass of N-acryloylmorpholine, 15 parts by mass of isobornyl acrylate, and 15 parts by mass of 2-hydroxyethyl acrylate were copolymerized to prepare (methyl ) acrylate polymer (A). When the molecular weight of this (meth)acrylate polymer (A) was measured by the method mentioned later, the weight average molecular weight (Mw) was 500,000.

[0185] (1-2) Preparation of adhesive composition P

[0186] 100 parts by mass of the (meth)acrylate polymer (A) obtained in the above step (1-1) (value in terms of solid content; the same applies hereinafter), 5 parts by mass of the active energy ray-curable compound (B) ε-caprolactone-modified tris(2-acryloyloxyethyl)isocyanurate (manufactured by Shin Nakamura Chemical Co., Ltd., product name "NK ESTER A-9300-1CL"), 0.15 parts b...

Embodiment 2

[0208] A resin composition was prepared in the same manner as in Example 1 except that the compounding amount of the active energy ray-curable compound (F) was changed to 5 parts by mass and the compounding amount of the photopolymerization initiator (G) was changed to 0.5 parts by mass. Q coating solution to produce the third laminated body. Except having used this 3rd laminated body, it carried out similarly to Example 1, and produced the double-sided adhesive sheet with a release sheet.

Embodiment 3

[0210] A double-sided adhesive sheet with a release sheet was produced in the same manner as in Example 1 except that the thickness of the intermediate layer was changed to 25 μm.

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Abstract

The invention provides a double-surface adhesion sheet with excellent section difference following performance and excellent machinability, a display member obtained through using the double-surface adhesion sheet, and a manufacturing method thereof. The double-surface adhesion sheet (2) is provided with the components of a first adhesive layer (21) as an outer layer of a surface side; a second adhesive layer (22) as the outer layer of the other side; and a middle layer (23) between the first adhesive layer (21) and the second adhesive layer (22), wherein the glass transition temperature of the middle layer (23) is above 0 DEG C and below 60 DEG C.

Description

technical field [0001] The present invention relates to a double-sided adhesive sheet suitable for sticking components of a display body, a display body obtained by using the double-sided adhesive sheet, and a manufacturing method thereof. Background technique [0002] Various mobile electronic devices such as smartphones and tablet terminals in recent years are equipped with displays using display modules including liquid crystal elements, light-emitting diodes (LED elements), and organic electroluminescence (organic EL) elements. Displays are also often used as touch panels. In the display as described above, generally, a protective panel is provided on the front side of the display module. [0003] Here, even if the protective panel is deformed by external force, a gap is provided between the protective panel and the display module so that the deformed protective panel does not collide with the display module. [0004] However, if there is such a gap, that is, an air la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J133/08G02F1/1333
CPCG02F1/133308C09J133/08C09J2431/006C09J2301/124C09J2301/312C09J7/20
Inventor 高桥洋一荒井隆行
Owner LINTEC CORP
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