FEP/PFA (Tetrafluoroethylene-Perfluoropropylene / Perfluoroalkoxy, Teflon)
FEP and PFA are fluorinated carbon hybrids with a high-molecular, partially crystalline structure. FEP and PFA are transparent and have a non-adhered surface.
The mechanical and chemical properties are comparable with PTFE, but the service temperature is limited to the area up to +205°C or 250°C. The humidity absorption of FEP is especially low.