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Adhesive sheet

A pressure-sensitive adhesive sheet, pressure-sensitive adhesive layer technology, applied in the direction of adhesive types, other rubber adhesives, ester copolymer adhesives, etc.

Inactive Publication Date: 2014-02-05
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a pressure-sensitive adhesive sheet having a conventional acrylic pressure-sensitive adhesive layer and a rubber-based pressure-sensitive adhesive layer on both sides thereof has a problem in that sufficient thinning thereof cannot be performed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0184] α-olefin-based pressure-sensitive adhesive (AO) (manufactured by Sumitomo Chemical Company, Limited, trade name: "Tafthren H5002") as a forming material of the rubber-based pressure-sensitive adhesive layer and as an acrylic pressure-sensitive adhesive An acrylic block copolymer (manufactured by KURARAY CO., LTD., trade name: "LA Polymer LA2140e", Mw=8.0×10 4 ) (this acrylic block copolymer hereinafter referred to as "Ac3") was fed into an extruder, and was subjected to a peeling treatment of a cover release rubber (manufactured by Mitsubishi Plastics, Inc., trade name: "Diafoil MRF38") The face was melt-extruded from a T-die to be shaped into a sheet in which a rubber-based pressure-sensitive adhesive layer (thickness: 10 μm) / acrylic-based pressure-sensitive adhesive layer (thickness: 10 μm) was laminated. Thus, a pressure-sensitive adhesive sheet (1) was obtained.

[0185] Table 1 shows the evaluation results of the pressure-sensitive adhesive sheet (1).

Embodiment 2

[0187] A pressure-sensitive adhesive layer was obtained in the same manner as in Example 1, except that Ac1 (acrylic block copolymer having a polyMMA-polyBA-polyMMA triblock structure) was used as the forming material of the acrylic pressure-sensitive adhesive layer. Sensitive Adhesive Sheet (2).

[0188] Table 1 shows the evaluation results of the pressure-sensitive adhesive sheet (2).

Embodiment 3

[0190] A pressure-sensitive adhesive layer was obtained in the same manner as in Example 1, except that Ac2 (acrylic block copolymer having a polyMMA-poly2EHA-polyMMA triblock structure) was used as the forming material of the acrylic pressure-sensitive adhesive layer. Sensitive Adhesive Sheet (3).

[0191] Table 1 shows the evaluation results of the pressure-sensitive adhesive sheet (3).

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Abstract

Provided is a pressure-sensitive adhesive sheet formed of at least two layers, including a rubber-based pressure-sensitive adhesive layer (A) and an acrylic pressure-sensitive adhesive layer (B) that are directly laminated, in which the pressure-sensitive adhesive sheet has a large interlayer peel strength. The pressure-sensitive adhesive sheet is a pressure-sensitive adhesive sheet formed of at least two layers, including a rubber-based pressure-sensitive adhesive layer (A) and an acrylic pressure-sensitive adhesive layer (B) that are directly laminated, in which the pressure-sensitive adhesive sheet has an interlayer peel strength upon peeling of the acrylic pressure-sensitive adhesive layer (B) from the rubber-based pressure-sensitive adhesive layer (A) under conditions of a measurement temperature of 23° C., a tension speed of 0.3 m / min, and a peel angle of 180° C. of 2.0 N / 20 mm or more.

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive sheet, and more particularly to a pressure-sensitive adhesive sheet formed of at least two layers comprising a directly laminated rubber-based pressure-sensitive adhesive layer (A) and an acrylic-based pressure-sensitive adhesive Layer (B), wherein the pressure-sensitive adhesive sheet has a large interlayer peel strength. Background technique [0002] Acrylic polymers are excellent in light resistance and transparency, and functions suitable for various uses can be imparted to acrylic polymers depending on the combination of raw materials for synthesizing the polymers. Therefore, acrylic polymers have been preferably used for the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet. [0003] For example, the following thermoplastic acrylic pressure-sensitive adhesives have been proposed (see, for example, Patent Documents 1 to 3). The pressure-sensitive adhesive is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J7/02C09J109/06C09J121/00C09J123/00C09J133/00C09J153/00C09J7/10
CPCC09J133/08C09J123/16C09J7/0221C09J2203/318C09J2423/16C09J2201/134C09J7/0214C09J7/0217C09J2201/36C09J2433/00C09J7/00C09J2201/622C09J121/00C09J133/10C09J135/06C09J2421/00C09J7/10Y10T428/1452Y10T428/2883Y10T428/2891C09J2301/1242C09J2301/208C09J2301/312
Inventor 武田公平生岛伸祐加藤有树
Owner NITTO DENKO CORP
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