Method for producing separation membrane, and said separation membrane and battery using same

The present invention relates to a method for producing a polyolefin-based porous separation membrane and, more particularly, to a method for producing a separation membrane having improved tensile strength and thermal shrinkage rate by adjusting the stretching factor of a base film during the casti...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JANG JUNG SUE, LEE SANG HO, CHO JAE HYUN, LEE JUNG SEONG, CHUNG JUN HO, KIM KEE WOOK
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	The present invention relates to a method for producing a polyolefin-based porous separation membrane and, more particularly, to a method for producing a separation membrane having improved tensile strength and thermal shrinkage rate by adjusting the stretching factor of a base film during the casting and stretching processes of a separation membrane production process. Also, the present invention relates to a polyolefin-based porous separation membrane having a small difference in tensile strength between the longitudinal direction and the transverse direction of the separation membrane, excellent tensile strength, and improved thermal shrinkage rate and improved puncture strength. Further, the present invention relates to an electrochemical battery of which the dimensional stability under heat and tension is improved using the separation membrane.