Heat-recoverable articles and their use

Details Heat-recoverable articles and their use Heat-recoverable articles and their use

C - Chemistry, Metallurgy

08

J

204/91.35

C08J 3/28 (2006.01) B29C 61/00 (2006.01) B29C 61/06 (2006.01) B29C 65/66 (2006.01) H01R 4/72 (2006.01) H02G 1/14 (2006.01) H02G 15/04 (2006.01) H02G 15/18 (2006.01)

Patent

CA 1122919

ABSTRACT In a method of covering a substrate, especially an elongate substrate such as an insulated electrical cable, a heat-recoverable covering member made of a cross-linked crystalline polymeric composition which transmits 5 to 50% of infra-red radiation incident thereon is placed around the substrate, whose exterior is composed of a polymeric com- position which is at most lightly cross-linked and which absorbs infra-red radiation and which has a crystalline melting point below that of the heat-recoverable covering member. The assembly is exposed to infra-red radiation such that the heat-recoverable covering member is heated to its recovery temperature and the exterior of the substrate is heated to its crystalline melting point, preferably before it is contacted by said covering member as the latter recovers. In this way an excellent seal can be created between the substrate and the recovered member without the need for any auxiliary fusible material such as a hot melt adhesive.

325913

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