PTFE (polytetrafluoroethylene, tradename Teflon) is a polymer material commonly used in sealing applications that offers unparalleled stability and sealing characteristics across an extremely wide range of temperatures, as shown in the table below.
Selecting the Right PTFE Filler for Your Application
Virgin PTFE has good properties, but they may not be good enough for demanding applications involving low creep, high compressive strength, and excellent wear properties. There are a variety of fillers that can be added to PTFE to solve those problems, however.