Polyolefin resin porous film

The purpose of the present invention is to provide a polyolefin resin porous film that maintains pore interconnectivity, has superior air permeability, and that, due to having a high shrinkage stress, is resistant to wrinkling during conveyance processes in high-temperature environments, therefore h...

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Bibliographische Detailangaben
Hauptverfasser:	TAKEGAWA KOUJI, YAMADA TAKEYOSHI, USAMI YASUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOSITIONS BASED THEREON 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:	The purpose of the present invention is to provide a polyolefin resin porous film that maintains pore interconnectivity, has superior air permeability, and that, due to having a high shrinkage stress, is resistant to wrinkling during conveyance processes in high-temperature environments, therefore having a superior coating suitability. The present invention is characterized in that, at 90 DEG C, the 1% modulus in the flow direction is equal to or greater than 4.5MPa, and the air permeability is equal to or less than 800s/100ml.