Process of producing thermoplastic polyester series resin foamed

Details Process of producing thermoplastic polyester series resin foamed Process of producing thermoplastic polyester series resin foamed

1991-11-15

1992-07-07

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521918, C08J 936

Patent

active

051283832

ABSTRACT:
A process of producing a thermoplastic polyester series resin foamed material is disclosed, which comprises heating and further foaming a thermoplastic polyester resin foamed material having a crystallinity of not higher than 30% by bringing into contact with water or steam of at least 60.degree. C. and then heating the foamed material by bringing into contact with a heating medium other than water of at least 100.degree. C. to further foaming the foamed material. A process of producing a thermoplastic polyester series resin foamed material is also disclosed, which comprises heating and further foaming a thermoplastic polyester series resin foamed material having a crystallinity of not higher than 30% by bringing into contact with water to steam of at least 60.degree. C., heating and further foaming the foamed material by bringing into contact with a heating medium other than water of at least 100.degree. C., and molding the foamed material by a mold.

REFERENCES:
patent: 4230759 (1980-10-01), Kouffman et al.
patent: 4462947 (1984-07-01), Huggard
patent: 4466933 (1984-08-01), Huggard
patent: 4585605 (1986-04-01), Kadota et al.

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