Hey, I work for a plastics extruding company that deals with PTFE a great deal, and depending on what exactly you are making, you may want to consider using ECTFE if possible. If you can find a supplier ECTFE is similar in price to the other flouropolymers, with a lower melt temperature and mechanical and chemical properties approaching that of FEP or PTFE. Not sure if there is a history of usingby relytyarg - General