PFA (Perfluoroalkoxy)
Trade names: TeflonŽ, NeoflonŽ
PFA has a virtually universal resistance to chemical attack. With just one or two rare exceptions it is inert to all chemicals. The service temperature limit depends upon the configuration and duty of the equipment but may be as high as 160 °C. Available as loose or bonded liners to Steel or GRP or Carbon fibre.
FEP (Fluorinated Ethylene Propylene)
Trade names: TeflonŽ, NeoflonŽ
FEP has the equivalent chemical resistance to PFA. The service temperature is lower and dependant upon the environments in the plant but can be as high as 120 °C. Available as loose or bonded liners to Steel or GRP or Carbon fibre.
ECTFE (Ethylene
ChloroTriFluoroEthylene
)
Trade name: HalarŽ
ECTFE has an excellent chemical resistance up to a service temperature of 120 °C. Some chlorinated solvents may cause swelling. Available as a loose or bonded liner to steel GRP or Carbon fibre.
PVDF (PolyVinyDene Fluoride)
Trade name: KynarŽ, ForaflonŽ, Solef.Ž, TrovidurŽ.
PVDF has a good resistance to most chemicals including acids, alkalis and strong oxidising agents and halogens.
It is attacked by oleum and swells in some organic solvents, particularly at elevated temperatures of 110°C. PVDF is available with a variety of backing materials therefore it can be bonded to many substances for a wide diversity of uses.
More easily fabricated than some other Fluoroplastic, resulting in lower cost.
PTFE (PolyTetraFluoroEthylene)
Trade names: TeflonŽ, NeoflonŽ
PTFE is inert to virtually all chemicals and solvents when used in thick sections. Service temperatures rated up to 160°C.
PTFE cannot be thermoformed or readily welded. It is not a true melt processable Fluoroplastic.
It is usually used as a loose liner to line columns and pipes of simple design.
ETFE (Ethylene TriFluoroEthylene )
Trade Names : Tefzel®
Tefzel can best be described as a rugged thermoplastic with an outstanding balance of properties. Mechanically, it is tough, has medium stiffness, excellent flex life, impact, cut-through and abrasion resistance.
Thermally Tefzel has a continuous temperature rating of 150°C.
Tefzel is weather resistant, inert to most solvents and chemicals and hydrolytically stable. Electrically it has an excellent low-loss dielectric, with a uniformity of electrical properties not normally found in thermoplastics.
