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Thermal expansion type removable acrylic pressure-sensitive adhesive tape or sheet and method of removal

A re-peelable, heated foaming technology, applied in the direction of adhesive heating, bonding method, adhesive type, chemical instrument and method, etc. power and other issues

Inactive Publication Date: 2010-09-15
NITTO DENKO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this adhesive tape has a structure that peels off at the interface between the adherend and the adhesive tape (interface between the adherend and the adhesive surface) by heating, so the adhesive force (adhesive force) differs depending on the adherend , sometimes cannot get stable peeling from the adherend
In addition, depending on the adherend, sometimes sufficient adhesive force cannot be obtained, so improvement is required.

Method used

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  • Thermal expansion type removable acrylic pressure-sensitive adhesive tape or sheet and method of removal
  • Thermal expansion type removable acrylic pressure-sensitive adhesive tape or sheet and method of removal
  • Thermal expansion type removable acrylic pressure-sensitive adhesive tape or sheet and method of removal

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0251] 90 parts by weight of 2-ethylhexyl acrylate, 10 parts by weight of acrylic acid, 0.05 parts by weight of a photoinitiator (trade name "Irgacure 184", manufactured by Ciba Specialty Chemicals), photoinitiator (trade name "Irgacure 651" , manufactured by Ciba Specialty Chemicals Co., Ltd.) 0.05 parts by weight were added into a four-necked flask, and exposed to ultraviolet rays under a nitrogen atmosphere to carry out photopolymerization, thereby obtaining a partially polymerized monomer slurry with a polymerization degree of 7%.

[0252] To 100 parts by weight of the partially polymerized monomer slurry, 30 parts by weight of a thermal foaming agent (heat-expandable microspheres, trade name "Mazumochi Microsufea F-50D", manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.), trimethylol 0.5 part by weight of propane triacrylate was uniformly mixed to obtain a heat blowing agent-containing adhesive composition (sometimes referred to as "heat blowing agent-containing adh...

preparation example 2

[0254] 90 parts by weight of 2-ethylhexyl acrylate, 10 parts by weight of acrylic acid, 0.05 parts by weight of a photoinitiator (trade name "Irgacure 184", manufactured by Ciba Specialty Chemicals), photoinitiator (trade name "Irgacure 651" , manufactured by Ciba Specialty Chemicals Co., Ltd.) 0.05 parts by weight were added into a four-necked flask, and exposed to ultraviolet rays under a nitrogen atmosphere to carry out photopolymerization, thereby obtaining a partially polymerized monomer slurry with a polymerization degree of 7%.

[0255] To 100 parts by weight of the partially polymerized monomer slurry, 30 parts by weight of a thermal foaming agent (heat-expandable microspheres, trade name "Mazumochi Microsufea F-50D", manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.), trimethylol 0.2 parts by weight of propane triacrylate was uniformly mixed to obtain a thermal foaming agent-containing adhesive composition (sometimes referred to as "thermal foaming agent-contain...

Embodiment 1

[0273] The thermal foaming agent adhesive composition (A) is applied to the release treatment surface of the process separator (B) so that the thickness after curing is 100 μm, and the thermal foaming agent composition (A) is obtained on the process separator (B). Foaming Agent Adhesive Composition Layer Ply with Thermal Foaming Agent Adhesive Composition.

[0274] The bubble-containing particle-containing polymerizable composition (A) is coated on the release treatment surface of the process separator (A) so that the thickness after curing is 800 μm, and the particle-containing polymer composition having mixed bubbles is obtained on the process separator (A). The mixed bubbles of the polymeric composition layer contain particles of the polymeric composition layer.

[0275] On one side of the peelable film (A), stick the layer sheet of the polymerizable composition containing bubbles in the form of contacting the layer of the polymerizable composition containing bubbles mixed ...

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Abstract

The invention provides a thermal expansion type removable acrylic pressure-sensitive adhesive tape which exhibits high ordinary joint strength independent of the material of an adherend and which permits easy disjoining or disjointing by heating. A thermal expansion type removable acrylic pressure-sensitive adhesive tape or sheet which comprises as the essentials a pressure-sensitive adhesive layer containing a thermal blowing agent, a release film layer, and a microparticle-containing viscoelastic substrate, characterized by having a structure wherein a laminate comprising a release film layer and a microparticle-containing viscoelastic substrate as the essentials is provided on at least one side of a pressure -sensitive adhesive layer containing a thermal blowing agent in such a way that the pressure-sensitive adhesive layer comes into contact with the release film layer either directly or through other layer.

Description

technical field [0001] The present invention relates to a heat-foamable re-peelable acrylic adhesive tape or sheet that can be easily detached by maintaining a high normal adhesive force at the time of joining and lowering the adhesive force by heating when peeling off, and the heating A peeling method of a foamable releasable acrylic pressure-sensitive adhesive tape or a pressure-sensitive adhesive sheet. Background technique [0002] Conventionally, base polymers used in acrylic pressure-sensitive adhesives have been prepared by solution-polymerizing acrylic monomers mainly composed of alkyl (meth)acrylates in organic solvents. In recent years, air pollution and environmental problems have become a problem due to the consideration of the global environment. Therefore, adhesive tapes or adhesive tapes that form an adhesive layer under solvent-free conditions are manufactured by ultraviolet polymerization of acrylic monomers. Laminated sheets (hereinafter, "adhesive tape or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02B32B27/00B32B27/30C09J4/02C09J11/08C09J133/00C09J11/04C09J7/29
CPCC09J133/08C09J4/00C09J7/0296C09J2205/106C09J2400/163C09J2201/606C09J2205/11C09J2433/00C09J2205/102C08L2312/06C09J5/06C09J133/14C09J2467/006C09J7/385C09J7/29Y10T428/1405Y10T156/1153C09J2301/412C09J2301/41C09J2301/302C09J2301/502C09J2301/408
Inventor 山中英治中岛淳格里特·伯萨特巴特·福立尔瓦尔特·艾瓦斯
Owner NITTO DENKO CORP