PROCESS FOR MODIFYING THE SURFACE OF POLYTETRAFLUORETHYLENE, MODIFIED MOULDINGS BASED ON POLYTETRAFLUORETHYLENE AND USE THEREOF

摘要

Process for modifying the surface of polytetrafluorethylene, or of copolymers consisting essentially of polytetrafluorethylenes, by the action of silicon, germanium, phosphorus or arsenic fluorides on the surface of the polymer which is heated to at least 150oC in the presence of humidity or by subsequent water or steam processing. The fluorides used penetrate the polymer to be modified and form during hydrolysis a firmly adhesive polymeric network.