| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide 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.SOLUTION: 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°C) of 0.3 to 5 g/10 min and a polyethylene based resin melt having a melt index (2.16 kg, 190°C) of 0.1 to 1.5 g/10 min so as to be alternately laminated; and heat-treating and stretching the manufactured film. The melt index ratio (A/B) of the polypropylene based resin melt (A) and the polyethylene based resin melt (B) is 2 to 10.</p> |
