PRODUCTION METHOD FOR THERMOPLASTIC RESIN FOAM, MOLDING MOLD THEREFOR AND THERMOPLASTIC RESIN FOAM

Title:

PRODUCTION METHOD FOR THERMOPLASTIC RESIN FOAM, MOLDING MOLD THEREFOR AND THERMOPLASTIC RESIN FOAM

Document Type and Number:

WIPO Patent Application WO/2001/015882

Kind Code:

A1

Abstract:

A thermoplastic resin foam in a desired shape, having a high expansion ratio and cells of a desired diameter, especially fine foam cells. A production method for a thermoplastic resin foam, comprising the steps of filling a thermoplastic resin containing a foaming agent into a cavity (31) of a mold (2a), and then foaming the resin by expanding the cavity (31), wherein, after a molten resin containing a foaming agent is filled into the cavity (31), the cavity (31) is expanded to a final cavity expansion width when an average temperature of the filled resin in the cavity (31) reaches a range from resin melting point to melting point plus 30°C with the cavity kept in a filled shape.

Inventors:

HARADA HIROSHI (JP)
KAWAUCHI HITOSHI (JP)
HIRANO HIROYUKI (JP)
SHIMURA SATOSHI (JP)

Application Number:

PCT/JP2000/005776

Publication Date:

March 08, 2001

Filing Date:

August 25, 2000

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SEKISUI CHEMICAL CO LTD (JP)
HARADA HIROSHI (JP)
KAWAUCHI HITOSHI (JP)
HIRANO HIROYUKI (JP)
SHIMURA SATOSHI (JP)

International Classes:

B29C44/08; B29C44/58; B29C44/34; (IPC1-7): B29C45/26; B29C44/42; B29C44/58; B29C45/00

Foreign References:

JPH0788878A	1995-04-04
JPH1119961A	1999-01-26
EP0799853A1	1997-10-08
JPS5457573A	1979-05-09
US5474723A	1995-12-12
JP2000037744A	2000-02-08

Other References: