Uncategorized
Patent
Uncategorized
204/91.41
Patent
CA 1262887
ABSTRACT MPo767 Abridgement A process for manufacturing a sealant coated heat recoverable polymeric article is disclosed. The process includes the steps of extruding at least two different poly- meric materials to form a unitary shaped article and thereafter exposing the shaped article to a source of radiation to thereby cross-link one of the polymeric materials and convert the other polymeric material into a tacky sealant. The article may be rendered dimensionally heat recoverable by either: a) deforming the article into a different shape at a temperature below the crystalline melt temperature of the cross-linkable material and then exposing the deformed article to a source of radiation or alter- natively, b) subsequent to an irradiation step, heating the article to about the crystalline melt temperature of the cross-linked material, distorting the article, and then cooling the article while maintaining it in the distorted shape to a temperature below the crystalline melt tem- perature; thereby by either method rendering the cross- linked portion of the article recoverable toward its original shape upon subsequent heating.
480815
Marks & Clerk
Raychem Corporation
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