PFA
PFA (perfluoroalkoxy) is a fully fluorinated plastic with chemical resistance and temperature capability close to PTFE (up to about 260 °C), but it can be melt-processed. It is used for linings, tubing, fittings and high-purity components.
What it is
Unlike PTFE, PFA can be injection moulded, extruded and welded, which makes it ideal for seamless linings, transfer-moulded valve parts and high-purity tubing. It is transparent to translucent and very clean.
PFA is expensive and used where PTFE's processing limits or other plastics' chemical limits are a problem.
Typical applications
- Lined pipes, valves and vessels
- High-purity tubing and fittings
- Semiconductor wet-process parts
- Laboratory ware
- Wire insulation
Materials & grades
- PFA resin, tubing and film
- PFA-lined components
Points to consider
- Much higher cost than PTFE stock shapes.
- Softer than many engineering plastics; creeps under load.
- Best for linings, tubing and moulded parts rather than machined bulk parts.
- Excellent purity for semiconductor and pharma uses.
Frequently asked questions
What is the difference between PFA and PTFE?
Both have similar chemical and temperature resistance, but PFA can be melt-processed (moulded, extruded, welded) while PTFE cannot.
What is PFA used for?
Linings, high-purity tubing and fittings, semiconductor and laboratory components.
What temperature can PFA handle?
Continuous use up to about 260 °C, similar to PTFE, which makes it suitable for hot, aggressive chemical service.