GRANULATED POWDER OF FILLED POLYTETRAFLUOROETHYLENE FOR MOLDING AND PROCESS FOR THE PRODUCTION THEREOF

摘要

A granulated powder of filled PTFE for molding which exhibits a high apparent density and a low quantity of electrification, is excellent in the fluidity in a powdery state, and can give molded articles not lowered in tensile strength and elongation and little suffering from discoloration due to surfactants; and a process for the production thereof. 100 parts by weight of a mixture comprising powdered PTFE and a filler is wetted with 30 to 60 parts by weight of an aqueous solution containing an anionic surfactant; in a concentration of 10 or more but less than 40 times the critical micelle concentration, and the resulting wet mixture is granulated by a mechanical force.