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Title:
METHOD FOR MANUFACTURING ALIPHATIC-AROMATIC COPOLYESTER RESIN FOAM, AND FOAMED SHEET
Document Type and Number:
Japanese Patent JP3810354
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a method for easily obtaining a resin foam uniformly finely foamed at a high expansion ratio by extrusion foaming an aliphatic-aromatic copolyester resin having biodegradability without raising a melt viscosity of the resin and to provide a foamed sheet of a high expansion ratio satisfied with a short maturing period after extrusion foaming.
SOLUTION: A method for manufacturing the aliphatic-aromatic copolyester resin includes the steps of press injecting a dimethyl ether as a foaming agent and a hydrocarbon in the aliphatic-aromatic copolyester resin melt in an extruder, extruding and foaming the resin.


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Inventors:
Takaaki Hirai
Shinichi Anan
Hiroyuki Tarumoto
Application Number:
JP2002217673A
Publication Date:
August 16, 2006
Filing Date:
July 26, 2002
Export Citation:
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Assignee:
Sekisui Plastics Co., Ltd.
International Classes:
B29C47/00; C08J9/14; C08L101/16; B29K67/00; B29K105/04; C08L67/02; (IPC1-7): B29C47/00; C08J9/14; //C08L101/16; B29K67:00; B29K105:04; C08L67:02
Domestic Patent References:
JP8231751A
JP2002256098A
JP2002194128A
Attorney, Agent or Firm:
Masami Sakai



 
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