Heat-peelable pressure-sensitive adhesive sheet and method...

Details Heat-peelable pressure-sensitive adhesive sheet and method... Heat-peelable pressure-sensitive adhesive sheet and method...

2005-02-18

2010-10-12

Nordmeyer, Patricia L (Department: 1783)

Stock material or miscellaneous articles

Layer or component removable to expose adhesive

C428S040200, C428S343000, C428S345000, C428S346000

Reexamination Certificate

active

07811647

ABSTRACT:
Disclosed is a heat-peelable pressure-sensitive adhesive sheet that can prevent the deformation of a pressure-sensitive adhesive layer due to pressurization in a pressing process and can be easily peeled off from the processed article.The heat-peelable pressure-sensitive adhesive sheet includes a substrate, and a heat-expandable pressure-sensitive adhesive layer arranged on or above at least one side of the substrate and containing a foaming agent, in which the heat-expandable pressure-sensitive adhesive layer has a shear modulus (23° C.) in an unfoamed state of 7×106Pa or more. The heat-expandable pressure-sensitive adhesive layer preferably has a shear modulus (95° C.) in an unfoamed state of less than 7×106Pa. The foaming agent in the heat-expandable pressure-sensitive adhesive layer preferably has a foam initiating temperature higher than 80° C.

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Japanese Office Action dated Apr. 27, 2010 for corresponding Japanese Application No. 2006-510903.

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