abstract |
The present invention relates to a substrate for a liquid filter, which is composed of a polyolefin microporous membrane, and the water permeability of the polyolefin microporous membrane is 0.10 to 0.50 ml/min. In the cm2, the foaming point of the polyolefin microporous film is 0.50 MPa or more and 0.80 MPa or less. |