PRODUCTION OF BIODEGRADABLE FOAM

PURPOSE:To produce a biodegradable foam which has low density, high elastic modulus and high compressive strength and is inexpensive and excellent in industrial productivity by thermally expanding a material comprising a polysaccharide and/or its derivative through injection molding, thereby providi...

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Bibliographische Detailangaben
Hauptverfasser:	YABU MASUO, ISSHIKI MASAYUKI, TERANISHI HITOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING 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 WORKING-UP
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Beschreibung
Zusammenfassung:	PURPOSE:To produce a biodegradable foam which has low density, high elastic modulus and high compressive strength and is inexpensive and excellent in industrial productivity by thermally expanding a material comprising a polysaccharide and/or its derivative through injection molding, thereby providing a substitute for packaging materials which exert undesirable malinfluence on environmental protection, such as expanded polystyrene. CONSTITUTION:The objective biodegradable foam having low density, high elastic modulus and excellent compressive strength is produced by thermally expanding 100 pts. material consisting mainly of a polysaccharide and/or its derivative through injection molding in the presence of 5-45 pts. water and 0.01-20 pts. water-insoluble cell regulator which generates gas on heating.