Process for the preparation of shaped articles

Details Process for the preparation of shaped articles Process for the preparation of shaped articles

B - Operations, Transporting

29

C

18/1164

B29C 53/08 (2006.01) B29C 61/02 (2006.01) B29C 65/00 (2006.01) B29C 67/00 (2006.01) B29D 23/00 (2006.01)

Patent

CA 1193063

ABSTRACT OF THE DISCLOSURE Shaped articles, particularly tubular shaped articles,are formed by a process comprising molding a crosslinkable synthetic plastic material into a first molded shape, crosslinking the plastic material at a temperature in excess of the crystalline melting point of the material, subjecting the crosslinked first shape to a working operation to form a second configura- tion shape and subjecting specific areas of the second shape to a heat treatment thereby forming a deformation in the specific area. Extruded tubular materials subjected to a stretching operation tend to seek their original shape upon heat treatment thereby making the degree of deformation possible nearly equal to the degree of stretching.

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