Process for injection molding of polyethylene terephthalate comp

Details Process for injection molding of polyethylene terephthalate comp Process for injection molding of polyethylene terephthalate comp

1979-11-19

1982-02-02

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

260 458R, 525 6, B29F 100, B28B 124

Patent

active

043139035

ABSTRACT:
This disclosure is concerned with a process for injection molding polyethylene terephthalate into colder molds, i.e., less than 120.degree. C., and still obtaining crystalline parts by incorporating an organic imide containing compound having a melting point in excess of 240.degree. C. into the composition. The presence of this additive enhances the crystallization velocity of the composition and permits the achievement of crystalline parts with optimum properties with colder molds and shorter molding cycles than are conventional for polyethylene terephthalate molding compositions.

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