POLYOLEFIN RESIN POROUS FILM

摘要

The purpose of the present invention is to provide a polyolefin resin porous film that maintains pore interconnectivity, has superior air permeability, and that, due to having a high shrinkage stress, is resistant to wrinkling during conveyance processes in high-temperature environments, therefore having a superior coating suitability. The present invention is characterized in that, at 90°C, the 1% modulus in the flow direction is equal to or greater than 4.5MPa, and the air permeability is equal to or less than 800s/100ml.