Provided are a filter medium for a filter, which makes it possible to obtain a filter high in collection efficiency, low in pressure loss and long in filter lifetime, a method for producing the same, and a filter using the filter medium for a filter. A fil...

To provide a polyketone porous film having heat resistance and chemical resistance and useful as a filter for filtration having a high particle collection efficiency and as a battery or capacitor separator having a low permeation resistance to ion and the ...