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Adhesive sheet, display body and manufacturing method therefor

A display body and adhesive sheet technology, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of light reflection loss, etc., and achieve excellent effects of step difference followability and anti-foaming

Active Publication Date: 2018-07-20
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 level difference, the adhesive layer floats near the level difference, resulting in light reflection loss

Method used

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  • Adhesive sheet, display body and manufacturing method therefor
  • Adhesive sheet, display body and manufacturing method therefor
  • Adhesive sheet, display body and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

manufacture example

[0150] As another production example of the adhesive sheet 1 using the adhesive composition P, the coating liquid of the above-mentioned adhesive composition P is applied to the release surface of one release sheet 12a, and heat treatment is performed to heat the adhesive composition P. Cross-linking forms a coating layer to obtain a release sheet 12a with a coating layer. In addition, on the peeling surface of the other peeling sheet 12b, the coating liquid of the above-mentioned adhesive composition P is coated, and heat treatment is performed to thermally crosslink the adhesive composition P to form a coating layer to obtain an attached coating layer. The release sheet 12b. Then, the peeling sheet 12a with a coating layer and the peeling sheet 12b with a coating layer are bonded so that both coating layers may contact each other. If a curing period is required, the curing period will pass. If the curing period is not required, the above-mentioned laminated coating layer wi...

Embodiment 1

[0199] 1. Preparation of (meth)acrylate copolymer

[0200] 65 parts by mass of 2-ethylhexyl acrylate, 15 parts by mass of isobornyl acrylate, 5 parts by mass of N-acryloylmorpholine, and 15 parts by mass of 2-hydroxyethyl acrylate were copolymerized to prepare (methyl ) acrylate copolymer (A). The molecular weight of this (meth)acrylate copolymer (A) was measured by the method mentioned later, and the weight average molecular weight (Mw) was 500,000.

[0201] 2. Preparation of Adhesive Composition

[0202] 100 parts by mass (value in terms of solid content; hereinafter the same) of the (meth)acrylate copolymer (A) obtained in the above step 1, 0.25 parts by mass of trihydroxy Methylpropane-modified toluene diisocyanate, 5.13 parts by mass of ε-caprolactone-modified tris(2-acryloyloxyethyl)isocyanurate as active energy ray-curable component (C), 7.5 parts by mass The polyrotaxane compound (D) (manufactured by Advanced Softmaterials, product number "SeRMSuper Polymer SH3400P"...

Embodiment 2～5、 comparative example 1～3

[0208] The mixing amount of thermal crosslinking agent (B), active energy ray-curable component (C), polyrotaxane compound (D) and photopolymerization initiator (E), and the thickness of the adhesive layer are shown in Table 1 Instead, the pressure-sensitive adhesive sheet was produced in the same manner as in Example 1 except that.

[0209] Here, the above-mentioned weight average molecular weight (Mw) is a weight average molecular weight in terms of standard polystyrene, measured under the following conditions (GPC measurement) using gel permeation chromatography (GPC).

[0210]

[0211] ■GPC measurement device: HLC-8020, manufactured by TOSOH

[0212] ■GPC column (passed in the following order): manufactured by TOSOH

[0213] TSK guard column HXL-H

[0214] TSK gel GMHXL (×2)

[0215] TSK gel G2000HXL

[0216]■Determination solvent: tetrahydrofuran

[0217] ■Measuring temperature: 40℃

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Abstract

The present invention provides an adhesive sheet which is able to relieve stress during lamination, has high strength of a coating film, and is excellent in both gap tracking properties and blister resistance, a display body which is excellent in both gap tracking properties and blister resistance, and methods of manufacturing the adhesive sheet and the display body. To achieve the purpose, the adhesive sheet (1) of the present invention comprises an adhesive layer (11) for bonding one display body forming member to other display body forming member, wherein the adhesive layer (11) is formed of an active energy ray curable adhesive containing a polyrotaxane compound. It is preferable that the adhesive layer (11) not only has a crosslinking structure comprised of a (meth)acrylic acid estercopolymer (A) and a thermal crosslinking agent (B), but also is formed of an active energy ray curable adhesive containing an active energy ray curable component (C) and a polyrotaxane compound (D).

Description

technical field [0001] The present invention relates to an adhesive sheet for bonding display constituent members, a display body obtained by bonding display constituent members, and their manufacturing methods. Background technique [0002] In recent years, various mobile electronic devices such as mobile phones, smartphones, and tablet terminals have displays (displays) using display modules including liquid crystal elements, light-emitting diodes (LED elements), organic electrophoresis Light-emitting (organic EL) elements, etc. [0003] In this display, generally, a protective panel is provided on the front side of the display module. Even when 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 a gap as described above, that is, an air layer, the light reflection loss due to the difference in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/30C09J4/06C09J11/06C09J11/08G09F9/00
CPCG09F9/00C09J4/06C09J11/06C09J11/08C09J2433/00C09J2467/006C09J2405/00C09J2301/122C09J7/20C09J7/40C09J133/08C09J2301/312
Inventor 小鲭翔高桥洋一荒井隆行
Owner LINTEC CORP
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