Heat-resistant foamed polyesters

Details Heat-resistant foamed polyesters Heat-resistant foamed polyesters

1982-12-28

1984-07-31

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264237, 264321, 264DIG5, 521 79, 521 81, 521138, 521182, B29H 720, C08J 902

Patent

active

044629478

ABSTRACT:
There are provided heat-resistant, foamed, crystalline polyesters, such as polyethylene terephthalate foamed with a polycarbonate and subjected to crystallization annealing, which are particularly useful for forming light weight, ovenable food containers.

REFERENCES:
patent: 3470114 (1969-09-01), Siggel et al.
patent: 4127631 (1978-11-01), Dempsey et al.
patent: 4224264 (1980-09-01), Ort

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