An object of the present invention is to provide porous polymer membranes with good water permeability and good hydrophilicity. The present invention relates to a porous polymer membrane including a copolymer (A) containing vinyl alcohol units and tetraflu...

The present invention provides a microporous polyolefin membrane of novel structure, and also provides a method of producing a microporous polyolefin membrane of high permeability and novel structure. The microporous polyolefin membrane is formed by the fi...