| 摘要 |
<p>A porous membrane comprising a poly(4-methylpentene-1) resin and having an apparent impedance of not more than 25 Φ.cm2 and a Young's modulus of not less than 40 kg/mm2; a laminated porous membrane comprising a laminate of at least two layers of a porous membrane layer (A) comprising a poly(4-methylpentene-1) resin and a porous membrane layer (B) comprising a polyolefin resin different from the resin constituting the layer (A) and having a melting point of 100 to 400 °C, wherein the laminate has an apparent impedance of not more than 25 Φ.cm2 and a Young's modulus of not less than 40 kg/mm2; a battery separator comprising the above porous membrane; and a process for preparing the same.</p> |
