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

2009-12-22

Nordmeyer, Patricia L (Department: 1794)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

C428S317500, C428S346000, C428S354000, C521S056000, C438S464000

Reexamination Certificate

active

07635516

ABSTRACT:
Disclosed is a heat-peelable pressure-sensitive adhesive sheet that can prevent the deformation of a pressure-sensitive adhesive layer caused by pressurization, further reduce chipping in grinding and cutting processes, be easily peeled off from a processed article after processing, and can be easily applied to an adhered at ordinary temperature. 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, the heat-expandable pressure-sensitive adhesive layer containing a foaming agent and having a shear modulus (23° C.) in an unfoamed state of 7×106Pa or more. The adhesive sheet further includes a pressure-sensitive adhesive layer being arranged on or above heat-expandable pressure-sensitive adhesive layer, wherein the pressure-sensitive adhesive layer has a shear modulus (23° C.) of less than 7×106Pa and a thickness of 0.01 to 10 μm.

REFERENCES:
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