LAMINATED POROUS FILM

PROBLEM TO BE SOLVED: To provide a laminated porous film capable of decreasing fractures on a manufacturing stage by reducing variation of pore size and having shutdown characteristics important to obtain high mechanical strength and safety while having excellent gas permeability contributing to bat...

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Bibliographische Detailangaben
Hauptverfasser:	TERAKAWA TORU, NEMOTO TOMOYUKI, MIURA TAKUYA
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a laminated porous film capable of decreasing fractures on a manufacturing stage by reducing variation of pore size and having shutdown characteristics important to obtain high mechanical strength and safety while having excellent gas permeability contributing to battery performance.SOLUTION: The laminated porous film has at least two layers of a I layer using polypropylene resin as a principal component and a II layer using a resin composition containing polyethylene system resin and styrene based elastomer as a principal component, and has a pin thrust strength of 1.6 N or more, a gas permeability rate at 25°C of 10-1000 seconds/100 mL and a gas permeability rate after heating for 1 minute at 140°C of 50000 seconds/100 mL or more.