Sk Innovation Co., Ltd.

Tae Gyu Kan

Sang Hyun Park

Byoung Cheon Jo

Min Ho Jeon

Sang Bae Cheong

Provided are a multilayer separator capable of improving interlayer peel strength and exhibiting excellent permeability due to a high degree of alignment, and a method of manufacturing the same. The method of manufacturing a multilayer separator includes: manufacturing a precursor film by co-extruding and molding a polypropylene based resin melt having a melt index (2.16 kg, 230&#xb0; C.) of 0.3 to 5 g/10 min and a polyethylene based resin melt having a melt index (2.16 kg, 190&#xb0; C.) of 0.1 to 1.5 g/10 min so as to be alternately laminated; and heat-treating and stretching the manufactured film, wherein a melt index ratio (A/B) of the polypropylene based resin melt (A) and polyethylene based resin melt (B) is 2 to 10.

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Daejeon, South Korea

Tae Gyu Kan