POLYTETRAFLUOROETHYLENE MIXTURE

摘要

Disclosed is a material capable of forming a polytetrafluoroethylene porous film which can readily be stretched biaxially, is capable of uniform stretching even at high stretching ratios, and has low pressure loss. The disclosed polytetrafluoroethylene mixture contains (A) a polytetrafluoroethylene having non-melt workability obtained by emulsion polymerization of tetrafluoroethylene, and (B) a polytetrafluoroethylene having non-melt workability obtained by suspension polymerization of tetrafluoroethylene.