A method for the production of extruded, porous articles made from polytetrafluoroethylene (ptfe)

摘要

Prodn. of extruded porous PTFE by lubricated extrusion of a ribbon, profile of tube of rare PTFE with an added filler of organic or mineral fillers e.g. glass balls or PPS of 5-30 micron dia. The prodn. is simultaneously submitted to a tension of 200-300% at the output of the die and a temp. greater than the sintering temp. The prod. is cooled to room temp. under tension.