Method for producing thermoplastic resin molded articles

Details Method for producing thermoplastic resin molded articles Method for producing thermoplastic resin molded articles

1979-12-28

1982-06-01

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264319, B29B 302

Patent

active

043327672

ABSTRACT:
A method for producing thermoplastic resin molded articles is disclosed. The method comprises heating a sheet comprising a crystalline thermoplastic resin, which is crosslinked to a degree of more than about 5%, to a temperature that is higher than the melting point of the crosslinked resin but below the decomposition temperature thereof. The thus pre-heated sheet is press-molded under a pressure of about 50-1,000 kg/cm.sup.2 by a pair of press mold dies, which are maintained at a temperature below the melting point of the crosslinked resin.

REFERENCES:
patent: 3286008 (1966-11-01), Power et al.
patent: 3621092 (1971-11-01), Hofer
patent: 3626053 (1971-12-01), Hofer
patent: 3923948 (1975-12-01), Jackson et al.
patent: 4034054 (1977-07-01), Sauer

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