POLYOLEFIN RESIN POROUS FILM

PROBLEM TO BE SOLVED: To provide a porous film composed of a high molecular weight polyolefin hard to extrusion-mold, and a manufacturing method thereof. SOLUTION: The porous polyolefin film is obtained using a non-reactive gas by melt-kneading by a twin-screw extruder a resin composition comprising...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAZOE SHINYA, AKASHI KAZUO
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 GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES 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:	PROBLEM TO BE SOLVED: To provide a porous film composed of a high molecular weight polyolefin hard to extrusion-mold, and a manufacturing method thereof. SOLUTION: The porous polyolefin film is obtained using a non-reactive gas by melt-kneading by a twin-screw extruder a resin composition comprising a polyolefin having a viscosity-average molecular weight of at least 200,000 with a non-reactive gas, extruding the obtained polyolefin resin composition containing the non-reactive gas, cooling and solidifying the extruded polyolefin resin and stretching the cooled and solidified polyolefin resin. The manufacturing method of the porous polyolefin film is also provided.