METHOD OF MANUFACTURING POLYOLEFIN MICROPOROUS FILMS

A method for manufacturing polyolefin microporous films is provided to produce the polyolefin microporous films having freely controllable permeation performance and excellent high-temperature dimensional stability without deteriorating strength thereof. A method for manufacturing polyolefin micropo...

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Bibliographische Detailangaben
Hauptverfasser:	SUH, CHANG HO, JEON, HAE SANG
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:	A method for manufacturing polyolefin microporous films is provided to produce the polyolefin microporous films having freely controllable permeation performance and excellent high-temperature dimensional stability without deteriorating strength thereof. A method for manufacturing polyolefin microporous films includes the steps of: melt-kneading a composition comprising a polyolefin resin and a plasticizer; extruding the melt-kneaded composition in a cool-solidified sheet form; performing at least one drawing in at least one-axial direction; extracting the plasticizer from the drawn sheet; and drawing the drawn sheet in a lengthwise direction after the extraction of the plasticizer.