Polyolefin resin porous film, and non-aqueous electrolyte cell separator using same

摘要

This polyolefin resin porous film can be easily produced, and when used as a non-aqueous electrolyte cell separator, can suppress clogging and can evince a high cell output. The polyolefin resin porous film is a porous film having a polyolefin resin as the primary component and is characterized by the average flow diameter pressure (PAP) being 1500-2500 kPa, the bubble point pressure (PBP) being 300-1500 kPa, and the ratio (Pa/PAP) of the air permeability (Pa) and the bubble point pressure (PBP) being no greater than 0.35 sec/(100 ml·kPa).

主权项

1. A polyolefin resin porous film containing:
a polyolefin resin as a main component thereof, wherein an average flow rate diameter pressure (PAP) is set to 1500 to 2500 kPa, a bubble point pressure (PBP) is set to 300 to 1500 kPa, and a ratio of an air permeability (Pa) to said bubble point pressure (PBP) is set to not more than 0.35 seconds/(100 ml·kPa) and wherein the polyolefin resin porous film has an electric resistance of not more than 0.85Ω.