Waxqabadka PTFE (polytetrafluoroethylene): ku habboon nidaamka biyaha iyo dareerayaasha dabiiciga ah ee kala duwan, u adkaysta dhammaan dareerayaasha, milanka hooseeya. Waxay leedahay sifooyin u adkaysta hawada iyo biyo la'aanta, qulqulka hawada weyn, heerka haynta qaybta sare, iska caabinta heerkulka wanaagsan, caabbinta asiidhyada xooggan, alkalis, dareerayaasha organic iyo oxidants, caabbinta gabowga, aan-dhejinta, ololka, aan sunta ahayn, iyo biocompatibility. Alaabooyinka la xidhiidha ayaa si weyn loogu isticmaalaa kiimikaad, dawooyinka, ilaalinta deegaanka, elektiroonigga, cuntada, tamarta iyo qaybaha kale