Process for the preparation of shaped articles

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

1982-01-26

1984-04-03

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642096, 2642105, 2642106, 264211, 264230, 264269, 264285, 264295, 264339, 264342R, B29C 2720

Patent

active

044407122

ABSTRACT:
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 configuration 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.

REFERENCES:
patent: 3050786 (1962-08-01), St. John et al.
patent: 3448182 (1969-06-01), Derbyshire et al.
patent: 3526683 (1970-09-01), Heslop et al.
patent: 3568311 (1971-03-01), Lawton
patent: 3939243 (1976-02-01), Dawson
patent: 3962766 (1976-06-01), Pompidor et al.
patent: 3972548 (1976-08-01), Roseen
patent: 4097573 (1978-06-01), Parmann
patent: 4236953 (1980-12-01), Takahashi
patent: 4309807 (1982-01-01), Hill et al.
patent: 4336222 (1982-06-01), Prohn

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