| 摘要 |
PURPOSE: To provide a porous film, having a highly strong and uniform porous structure, also excellent in affinity for an electrolysis solution, and suitable as a separator of a fuel cell and a capacitor and the like, to provide a production method thereof, and further to provide the fuel cell and the capacitor that are obtained by using the separator composed of the above porous film. CONSTITUTION: The porous film is characterized in that the resin composition is composed of a high-molecular-weight polyolefin resistor 70-99.9 wt.% and a polymer of 0.1-30 wt.% which has, as a main chain, a polyacrylate, polymethacrylate, polyethylene oxide, polypropylene oxide, polyethylenepropylene oxide, polyphosphazene, polyvinyl ether or polysiloxane structure, and as a side chain, a chain oligoalkylylene oxide. This porous film is obtained by heating and kneading the high-molecular-weight polyolefin resin and the above polymer in a solvent, molding the resultant kneaded material to a gel-type sheet, rolling and/or extending it, and thereafter removing the solvent.
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