MICROPOROUS FILM AND ITS MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a microporous film whose broken membrane temperature is high, whose thermal shrinkage is small in either direction of TD and MD, and whose permeability is excellent.SOLUTION: The microporous film is composed of a thermoplastic resin composition including 100 pts.mass...

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Bibliographische Detailangaben
Hauptverfasser:	NADA JUN, KIKUCHI KENTARO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS ELECTRICITY GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a microporous film whose broken membrane temperature is high, whose thermal shrinkage is small in either direction of TD and MD, and whose permeability is excellent.SOLUTION: The microporous film is composed of a thermoplastic resin composition including 100 pts.mass of (a) a polypropylene resin, and 5 to 90 pts.mass of (b) a polyphenylene ether resin, wherein a predetermined melt flow rate is 1.5 to 5.0 grams per 10 minutes.