POLYETHYLENE MICROPOROUS MEMBRANE AND PROCESS FOR MANUFACTURING SAME

摘要

A polyethylene microporous membrane having a Gurley air permeability of 1 to 1,000 sec/100 mL/25 µm, wherein the total length of waviness widths in the width direction of the polyethylene microporous membrane is not more than one-third of the overall width of the microporous membrane, and a process for producing the same. Provided is a polyethylene microporous membrane having excellent planarity without compromising any other important physical property such as permeability.