HEAT EXPANDABLE REMOVABLE ACRYLIC PRESSURE-SENSITIVE ADHESIVE TAPE OR SHEET, AND METHOD OF REMOVING THE SAME
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United States of America Patent
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Issued Date -
Feb 9, 2012
app pub date -
Oct 15, 2008
filing date -
Oct 22, 2007
priority date (Note) -
Abandoned
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Abstract
An object of the present invention is to provide a heat-expandable/peelable acrylic pressure-sensitive adhesive tape that maintains a high adhesion force, and can be easily separated or debonded at the bonded part by heating, regardless of the material constituting the adherend.Disclosed is a heat-expandable/peelable acrylic pressure-sensitive adhesive tape or sheet which includes at least a pressure-sensitive adhesive layer containing a blowing agent, a peelable or peel-assisting film layer, and a viscoelastic substrate containing microparticles, in which at least the peelable or peel-assisting film layer and the microparticle-containing viscoelastic substrate constitute a multilayer structure, and the multilayer structure is arranged on or above at least one side of the pressure-sensitive adhesive layer so that the blowing agent-containing pressure-sensitive adhesive layer is in contact with the peelable or peel-assisting film layer with or without the interposition of another layer.
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