METHOD FOR MANUFACTURING FOAM MOLDED BODY AND FOAM MOLDED BODY

Title:

METHOD FOR MANUFACTURING FOAM MOLDED BODY AND FOAM MOLDED BODY

Document Type and Number:

WIPO Patent Application WO/2019/003748

Kind Code:

A1

Abstract:

Provided is a method for manufacturing a foam molded body having high heat resistance. A method for manufacturing a foam molded body using a plasticizing cylinder having a plasticizing zone and a starvation zone comprises: plasticizing and melting a thermoplastic resin into a molten resin in the plasticizing zone; introducing a pressurized fluid containing a physical foaming agent at a constant pressure into the starvation zone to maintain the starvation zone at the constant pressure; bringing the molten resin into a starvation state in the starvation zone; causing the molten resin in the starvation state and the pressurized fluid containing the physical foaming agent at the constant pressure to come into contact with each other in the starvation zone with the starvation zone maintained at the constant pressure; and molding the molten resin that has been brought into contact with the pressurized fluid containing the physical foaming agent into a foam molded body. The thermoplastic resin is super engineering plastic, and the constant pressure is 0.5 MPa to 12 MPa.

Inventors:

YUSA ATSUSHI (JP)
GOTO HIDETO (JP)
YAMAMOTO SATOSHI (JP)

Application Number:

PCT/JP2018/020294

Publication Date:

January 03, 2019

Filing Date:

May 28, 2018

Export Citation:

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Assignee:

MAXELL LTD (JP)

International Classes:

B29C44/00; B29C45/00; B29C45/60; B29C45/77; C08J9/12; B29K81/00

Domestic Patent References:

WO2007122957A1

2007-11-01

Foreign References:

JP2016087887A	2016-05-23
JP2002079545A	2002-03-19
JP2003191272A	2003-07-08
JP2015151471A	2015-08-24
JPH1134130A	1999-02-09
JP2625576B2	1997-07-02
JP3788750B2	2006-06-21
JP4144916B2	2008-09-03
JP2013060508A	2013-04-04
JP2012251022A	2012-12-20

Other References: