| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polyketone porous membrane having heat resistance and chemical resistance and useful as a filtration filter having high collection efficiency of, for example, impurities or as a separator for a battery or a capacitor having low permeation resistance to ion or the like and high insulation. <P>SOLUTION: The polyketone porous membrane contains 10-100 mass% polyketone being the copolymer of carbon monoxide and one or more kinds of olefin. The polyketone porous membrane has ≤1 μm maximum pore diameter, 5-90% porosity and has a polyketone portion formed of only polyketone over the film thickness direction, wherein the polyketone portion has a dense layer having ≥80% polymer filling ratio and a non-dense layer having <80% polymer filling ratio and a ratio T1:T2 of the thickness T1 of the dense layer and the thickness T2 of the non-dense layer is (1:99) to (50:50). <P>COPYRIGHT: (C)2013,JPO&INPIT |
