Release sheet and pressure-sensitive adhesive article

Details Release sheet and pressure-sensitive adhesive article Release sheet and pressure-sensitive adhesive article

2011-03-01

2011-03-01

Chang, Victor S (Department: 1788)

Stock material or miscellaneous articles

Layer or component removable to expose adhesive

Release layer

C428S040100

Reexamination Certificate

active

07897229

ABSTRACT:
A pressure-sensitive adhesive article100includes a release sheet1constituted from a releasing agent layer11and a base material12, and a pressure-sensitive adhesive sheet2constituted from a pressure-sensitive adhesive layer21and a pressure-sensitive adhesive sheet base22. Such a pressure-sensitive adhesive article100has a structure in which the pressure-sensitive adhesive sheet2is laminated on the release sheet1so that the pressure-sensitive adhesive layer21is in contact with the releasing agent layer11. The releasing agent layer11is composed of a material containing substantially no silicone compound. The releasing agent layer11is mainly composed of an elastomer and has a Young's modulus of 1.5 GPa or less. Preferred examples of the elastomer include polybutadiene rubber (especially, 1,4-polybutadiene rubber), polyisoprene rubber, and ethylene propylene rubber. The release sheet1has excellent releasability and has little adverse effect on electric components and the like.

REFERENCES:
patent: 2647843 (1953-08-01), Bemmels
patent: 2987420 (1961-06-01), Bemmels et al.
patent: 2004/0071919 (2004-04-01), Sakurai et al.
patent: 1495241 (2004-05-01), None
Office Action for Chinese Application No. 200610068118.3, dated Sep. 4, 2009, 7 pages.

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