Process for producing foamed body of thermoplastic resin

Details Process for producing foamed body of thermoplastic resin Process for producing foamed body of thermoplastic resin

2005-03-10

2010-11-16

Heitbrink, Jill L (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

C264S328700

Reexamination Certificate

active

07833445

ABSTRACT:
The invention provides a foamed body of thermoplastic resin having a high expansion ratio, desired shape and cells of desired diameter, especially fine cells. The foamed body of thermoplastic resin is produced by filling the thermoplastic resin containing a foaming agent into a cavity31of a mold2aand thereafter enlarging the cavity31to expand the resin. In this process, the cavity31is completely filled with the resin as melted and containing the foaming agent, then held in its shape as filled with the resin and enlarged to an increased final cavity width upon the average temperature filled in the cavity31reaching the range from the melting point of the resin to the melting point plus 30° C.

REFERENCES:
patent: 3793415 (1974-02-01), Smith
patent: 3812225 (1974-05-01), Hosoda et al.
patent: 3863000 (1975-01-01), Kasai et al.
patent: 3954926 (1976-05-01), Pahl et al.
patent: 4629745 (1986-12-01), Hoki et al.
patent: 5116881 (1992-05-01), Park et al.
patent: 5252269 (1993-10-01), Hara et al.
patent: 5281376 (1994-01-01), Hara et al.
patent: 5474723 (1995-12-01), Horikoshi
patent: 5547621 (1996-08-01), Naritomi
patent: 5575871 (1996-11-01), Ryoshi et al.
patent: 6040375 (2000-03-01), Behme et al.
patent: 6213540 (2001-04-01), Tusim et al.
patent: 0 799 853-A-1 (1997-10-01), None
patent: 0 839 624 (1998-05-01), None
patent: 2 707 549 (1995-01-01), None
patent: 54-057573 (1979-05-01), None
patent: 07-088878 (1995-04-01), None
patent: 08-090599 (1996-04-01), None
patent: 08-300391 (1996-11-01), None
patent: 08-318542 (1996-12-01), None
patent: 10-230528 (1998-09-01), None
patent: 11-019961 (1999-01-01), None
patent: 2000-037744 (2000-02-01), None
Handbook of Plastic Foams, Landrock-editor, 1995, Noyes Publications, pp. 221-245.
Plastics Additives—An A-Z Reference, Pitchard-editor, 1998, Springer-Verlag Publisher, pp. 142-147.
International Search Report for the Application No. PCT/JP00/05776 mailed Nov. 14, 2000.

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