Disclosed is a poly(4-methyl-1-pentene) resin composition having an excellent balance between micropore formability and toughness, which can sufficiently form fine pores by drawing and does not cause a break during drawing. The poly(4-methyl-1-pentene) res...

The invention intends to provide a porous film which is formed on a surface of an electrode used for such as a secondary battery and the like, which has excellent binding property and is capable to contribute for improving a cyclic characteristic of the ba...

It is intended to provide a proton conducting membrane which is excellent in heat resistance, dimensional stability, fuel barrier properties, flexibility, etc. and exhibits an excellent protonic conductivity even at high temperatures, a method of producing...

A porous film having excellent permeability and mechanical strength and having resistance to film breakage at high temperatures, a battery separator comprising the porous film, and a non-aqueous electrolyte battery using the separator. The porous film comp...

To provide a microporous film having excellent permeability and mechanical strength as well as excellent SD function at low temperatures and film-breaking resistance at high temperatures. A microporous film made of a resin composition at least comprising 1...