Process for preparing thermoplastic containers

Details Process for preparing thermoplastic containers Process for preparing thermoplastic containers

1993-03-22

1995-01-03

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Utilizing heat releasable stress to reshape solid workpiece

264235, 264342R, 264530, B29C 3502, B29C 4918

Patent

active

053784219

ABSTRACT:
Process crystallizes at least a portion of a molecularly oriented thermoplastic container by heat treating at least portions thereof at temperatures suitable to crystallize the portions, including the steps of heating at a first temperature for at least 5 seconds below a final crystallization temperature to heat set the container, followed by heating at a second temperature for at least 10 seconds at a final temperature to obtain crystallinity above 40%, wherein each of the heating steps is accompanied by shrinkage and distortion of the container; and sizing said crystallized container to a final shape.

REFERENCES:
patent: 4385089 (1983-05-01), Bonnebat et al.
patent: 4550007 (1985-10-01), Ohtsu et al.
patent: 4836971 (1989-06-01), Denis et al.
patent: 5229042 (1993-07-01), Denis et al.
patent: 5248533 (1993-09-01), Sugiura et al.

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