Cleavable release structure

Details Cleavable release structure Cleavable release structure

C - Chemistry, Metallurgy

09

J

C09J 7/02 (2006.01)

Patent

CA 2113932

ABSTRACT OF THE DISCLOSURE A cleavable release structure composed of two release bases each having an outer surface and an inner surface; a release coating on the inner surface of each release base; a layer of a pressure sensitive adhesive adjacent the coating on the inner surface of each release base; and a cleavable layer sandwiched between the pressure sensitive adhesive layers, so that the cleavable layer is adapted to cleave and separate when subjected to a peeling force greater than its internal bond strength and less than the adhesion force of the pressure sensitive adhesive. Each layer of pressure sensitive adhesive should be adapted to provide an adhesion force greater than about 24 ounces per inch of width. The release coating should be adapted to provide a release level of from about 1 to about 30 grams per centimeter of width. The cleavable layer should have an internal bond strength of from about 2 to about 20 ounces per inch of width.

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