PROCESS FOR PRODUCING GRANULAR POLYTETRAFLUOROETHYLENE POWDER

摘要

The process for preparing a granular polytetrafluoroethylene powder by using a non-flammable bromine-containing organic solvent having a boiling point of 0 to 150 DEG C, particularly 1-bromopropane as an organic liquid. According to the preparation process, it is possible to exhibit granulation performance equal to a flon type organic solvent which gives particularly excellent performance, to provide a granular PTFE powder being excellent in powder characteristics safely at low cost, and to contribute to lowering of depletion of the ozone layer and prevention of global warming. <IMAGE>