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Adhesive tape, article, motor, and method for producing article

A manufacturing method and motor technology, applied in the direction of chemical instruments and methods, adhesives, layered products, etc., can solve the problem that the second adhesive layer cannot show sufficient adhesive force on the adherend, and achieve excellent adhesive strength, The effect of improving productivity

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

AI Technical Summary

Problems solved by technology

[0006] However, fine unevenness may be formed on the surface of the second adhesive layer due to the thermal expansion.
The second adhesive layer having the surface on which the fine unevenness is formed may not exhibit sufficient adhesive force to the adherend

Method used

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  • Adhesive tape, article, motor, and method for producing article
  • Adhesive tape, article, motor, and method for producing article
  • Adhesive tape, article, motor, and method for producing article

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0088]

[0089] 21.4 parts by mass of EPICLON N-680 (cresol novolac type epoxy resin solution manufactured by DIC Corporation, epoxy equivalent 215 g / eq, non-volatile content 75% by mass) and "JER YL-7862" (Mitsubishi Chemical Corporation After mixing 48 parts by mass of bisphenol A type epoxy resin solution manufactured by the company, epoxy equivalent 3748g / eq, 50% by mass of non-volatile components, 30.6 parts by mass of methyl ethyl ketone was mixed to obtain epoxy resin with 40% by mass of non-volatile components Resin composition (1).

[0090] Then, with respect to 100 parts by mass of the epoxy resin composition (1), EXPANCEL051-40 (manufactured by Japan Fillite Co., Ltd., heat-expandable microcapsules, initial particle size 12 μm, expansion start temperature 110° C., 130 The volume expansion rate at ° C is 7 times) 3.2 parts by mass, Curezol 2MAOK-PW (manufactured by Shikoku Chemicals Co., Ltd., imidazole-based curing accelerator) 0.4 parts by mass as a curing agent,...

preparation example 2

[0092]

[0093] Except that the amount of EXPANCEL 051-40 (manufactured by Japan Fillite Co., Ltd., heat-expandable microcapsules, initial particle size 12 μm, expansion start temperature 110°C, volume expansion rate 7 times at 130°C) was changed from 3.2 parts by mass Except that it was 6.4 parts by mass, an adhesive composition (a-2) was obtained by the method similar to Preparation Example 1.

preparation example 3

[0095]

[0096] Except that the amount of EXPANCEL 051-40 (manufactured by Japan Fillite Co., Ltd., heat-expandable microcapsules, initial particle size 12 μm, expansion start temperature 110°C, volume expansion rate 7 times at 130°C) was changed from 3.2 parts by mass Except that it was 9.6 parts by mass, an adhesive composition (a-3) was obtained by the method similar to Preparation Example 1.

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PUM

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Abstract

The present invention addresses the problem of providing an adhesive tape capable of expansion due to stimulation such as heating, said adhesive tape exhibiting excellent adhesive strength even after expansion. The present invention relates to an adhesive tape having an adhesive layer (B) on one surface of an adhesive layer (A), said adhesive layer (B) being in direct contact with the adhesive layer (A) or having another layer interposed therebetween, wherein the adhesive tape is characterized in that, after being left to stand in a 130 DEG C environment for one hour, the expansion ratio (thickness of the adhesive layer (A) after being left to stand / thickness of the adhesive layer (A) before being left to stand) in the thickness direction of the adhesive layer (A) multiplied by 100 is 200% or more, and the expansion ratio (thickness of the adhesive layer (B) after being left to stand / thickness of the adhesive layer (B) before being left to stand) in the thickness direction of the adhesive layer (B) multiplied by 100 is 120% or less.

Description

technical field [0001] The present invention relates to an adhesive tape having a configuration in which volume expands when a stimulus such as heating is applied. Background technique [0002] Since the adhesive tape can be suitably used for fixing two or more adherends, it is widely used, for example, in the manufacture of various products such as automobiles and electric equipment. [0003] On the other hand, in the process of further expanding the application range of the adhesive tape, the adhesive tape is used, for example, when it is required to be able to fix another adherend in the void of one adherend. Specifically, as a motor mounted in a hybrid vehicle or the like, a motor having a configuration in which a core (rotor core) has a gap at a predetermined position and a magnet is embedded in the gap is generally known. It has been considered to use an adhesive tape when fixing the magnet in the void of the core. [0004] As an adhesive tape that can be used in the...

Claims

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Application Information

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IPC IPC(8): C09J7/00B32B27/00C09J7/02C09J201/00H02K1/27C09J7/10
CPCB32B27/00C09J201/00H02K1/27C09J7/20C09J7/10
Inventor 秋山诚二森野彰规
Owner DIC CORP
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