Composition comprising PTFE as main component, mixed powder, molding material, filter medium for filter, air filter unit, and method for producing porous membrane

摘要

Provided is a composition capable of obtaining a porous film in which a decrease in performance is suppressed even when subjected to a compressive force or the like in a subsequent process. The composition according to one aspect of the present invention includes a polytetrafluoroethylene that can be fiberized, a non-heat-melt processable component that does not fiberize, and a heat-melt processable component that does not fiberize and has a melting point of less than 320 ° C. It contains less than 0.1 to 20% by weight of the entire component that can be heat-melt processed without being fiberized.