Provided is a microporous film which is made of a thermoplastic resin composition comprising (a) 100 parts by mass of a polypropylene resin and (b) 5 to 90 parts by mass of a polyphenylene ether resin, and which has a sea island structure comprising a sea ...

There is provided a laminated microporous film having an excellent balance between air permeability and film rupture temperature obtained by laminating a first microporous layer comprising a first resin composition and a second microporous layer comprising...