Method of making a composite foamed and shaped article

Details Method of making a composite foamed and shaped article Method of making a composite foamed and shaped article

1989-10-24

1991-10-22

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 451, 264 464, 264126, 264255, 264302, B29C 4118

Patent

active

050593625

ABSTRACT:
A method of making a composite foamed and shaped article including in the first step in which a thermoplastic resin powder is filled in a slush molding die to form a first resin layer, a second step in which a mixed powder consisting of a heat decomposable foaming agent and the thermoplastic resin powder is filled in the die in which the first resin layer was already formed, to form a second resin layer on the surface of the first resin layer, and a third step in which the heat decomposable foaming agent is made to foam by heat treatment to form a final product of a composite foamed and shaped article wherein the slush molding die is pre-heated by an infrared heating method.

REFERENCES:
patent: 2588571 (1952-03-01), Porter
patent: 2950505 (1960-08-01), Frank
patent: 3493994 (1970-02-01), Wersosky et al.
patent: 3617588 (1971-11-01), Langman
patent: 3832117 (1974-08-01), Hijikata et al.
patent: 4217325 (1980-08-01), Colby
patent: 4606868 (1986-08-01), Christoph et al.
patent: 4692293 (1987-09-01), Gray

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