POROUS FILM AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To provide a porous film resistant to thermal shrinkage and having high strength and high porosity and provide its production process. SOLUTION: The porous film is composed of an ultra-high molecular weight polyolefin having a weight-average molecular weight of >=1×106 and a...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAGUCHI MUTSUKO, NOMI TOSHISUKE, YAMAMOTO KAZUNARI, ICHIKAWA TOMOAKI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a porous film resistant to thermal shrinkage and having high strength and high porosity and provide its production process. SOLUTION: The porous film is composed of an ultra-high molecular weight polyolefin having a weight-average molecular weight of >=1×106 and a weight- average molecular weight/number-average molecular weight ratio of =40% and the thermal shrinkage of =1×106 and a weight-average molecular weight/number-average molecular weight ratio of