Ticona CELCON LW90-F5 POM Celcon LW90-F5 is a acetal copolymer formulated with a nominal 9 melt flow rate base polymer and very high level of polytetrafluoroethylene filler (PTFE). It is designed for use in wear applications against plastics, metal, glass or ceramic mating surfaces where silicone lubricants can not be tolerated.