COMPOSITION MAINLY COMPOSED OF PTFE, MIXED POWDER, MOLDING MATERIAL, FILTERING MEDIUM FOR FILTER, AIR FILTER UNIT, AND POROUS MEMBRANE MANUFACTURING METHOD

摘要

The present invention provides a composition in which a porous membrane is obtainable, which can suppress a decrease in the performance even when compressive force or the like is applied in a post step. The composition of one embodiment of the present invention containing polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320°C that is not fibrillated, wherein the hot melt processable component that is not fibrillated is contained at being equal to or more than 0.1% by weight but less than 20% by weight of the total.