| abstract |
The microporous membrane according to the present invention is a microporous membrane containing copolymerized high-density polyethylene and high-density polyethylene, and the content of α-olefin units having 3 or more carbon atoms in the microporous membrane is 0.01 mol. % To 0.6 mol%, and the viscosity average molecular weight of the microporous membrane is less than 300,000. Moreover, the battery separator according to the present invention includes the microporous film. Furthermore, the battery according to the present invention includes the battery separator. |