PTFE-based thermoplastics

FL1™ Virgin PTFE

FL1™ har excellent chemical and thermal resistance. FDA-approved. Limited mechanical properties. If improved mechanical properties are required FL5™ or a filled PTFE should be considered.

FL2™ PTFE filled with with glass fibres/molybdenum disulphide

Because of its special composition, FL2™ has good physical properties and distinctly better creep behaviour than PTFE-virgin. Also higher wear resistance than most PTFE with fillers.

FL3™ PTFE filled with bronze

FL3™ has good mechanical properties, and can be used at higher loads compared to FL2 and FL5.

FL4™ Modified PTFE filled with carbon

FL4™ has excellent compression and wear resistance, good thermal conductivity and low permeability. Suitable for a wide range of applications.

FL5™ Modified PTFE

FL5™ has the same chemical properties as PTFE-virgin, and is also defined as a homopolymer according to ISO 12086. FL5 has highly improved mechanical properties in comparison to PTFE-virgin, see also the “Suggested Materials” section. Seal Engineering AS considers FL5 to be our standard “PTFE-virgin”. 

FL14™ PTFE filled with Ekonol®

FL14™ has excellent wear resistance. The filler is very gentle to mating metal surfaces, making it a good choice for rotary applications. FL14 is FDA approved and widely used in the food industry.

FL22™ PTFE filled with carbon and graphite

FL22™ is suitable for demanding dynamic applications.