METHOD FOR MANUFACTURING RESIN FOAM, AND RESIN FOAM

PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin foam having a proper surface appearance, a uniform and fine foamed cell, proper transferability and a high expansion ratio. SOLUTION: The method for manufacturing the resin foam includes an injection step of injecting a foamable res...

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Bibliographische Detailangaben
Hauptverfasser:	SAKAMOTO HIROMOTO, WASHIYAMA JUNICHIRO, KATAGIRI AKIKIMI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin foam having a proper surface appearance, a uniform and fine foamed cell, proper transferability and a high expansion ratio. SOLUTION: The method for manufacturing the resin foam includes an injection step of injecting a foamable resin composition containing a polypropylene component (A) of 77 to 95 mass% containing at least a crystalline propylene-ethylene copolymer, an ethylene-1-octene random copolymer (B) of 5 to 13 mass% and an ethylene-1-butene random copolymer (C) of 0 to 10 mass%, and a foaming agent (D) of 0.1 to 5 mass pts. to 100 mass pts. of resin component in a cavity pressurized by a gas, an injection step, and then a foaming step of foaming the foamable resin composition by enlarging a volume of the cavity. COPYRIGHT: (C)2004,JPO