Extrusion molding of polyamidoimide resins

Details Extrusion molding of polyamidoimide resins Extrusion molding of polyamidoimide resins

1982-01-19

1984-02-14

Czaja, Donald E.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

26433112, 26433119, 528188, B29F 300

Patent

active

044316003

ABSTRACT:
A process for extrusion molding a polyamidoimide resin comprising: feeding a polyamidoimide molding material in a granular solid or powder form into an extruder; then simultaneously compressing and melting the polyamidoimide molding material under a pressure of about 300 kg/cm.sup.2 or more by heating it to a temperature between the melting point and the decomposition temperature of the polyamidoimide resin; and next introducing the molten polyamidoimide molding material into a die such that the molten material is shaped to a desired form, solidified in the die, and is extruded from the die in a solidified form.

REFERENCES:
patent: 2350851 (1944-06-01), Wehr
patent: 3676544 (1972-07-01), Reinking et al.
patent: 3714131 (1973-01-01), Hoback et al.
patent: 4012478 (1977-03-01), Horikawa et al.
patent: 4051212 (1977-09-01), Grigat et al.
patent: 4238538 (1980-12-01), Manwiller

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