Introduction to PFA
PFA is a relatively new melt-processable fluoroplastic with the English name Polyfluoroalkoxy, which is known in Chinese as tetrafluoroethylene – perfluoro alkoxy vinyl ether copolymer, also known as perfluoroalkylated or soluble polytetrafluoroethylene. As a fluoropolymer lining material, PFA has excellent chemical and corrosion resistance. a basic introduction to PFA includes its name, chemical composition and commonly used Chinese names.
Chemical properties of PFA compared to other fluoroplastics
Compared to FEP and PTFE, PFA has similar chemical properties, but FEP can only be used below 200 degrees, while PTFE cannot be injection moulded. PFA can be processed directly into products by common thermoplastic moulding methods and has a long-term service temperature of -80 to 260 degrees. It has excellent chemical resistance to all chemicals. PFA has excellent chemical resistance to corrosive substances and its smooth, low-friction surface prevents degradation. PFA has a wide temperature range, ensuring excellent stability in extremely harsh environments.
Excellent performance of PFA
The performance of PFA is as excellent as PTFE, with good thermoplasticity, heat resistance, cold resistance, chemical stability, mechanical and insulating properties, self-lubrication, folding resistance and excellent crack resistance. Compared to PTFE, PFA has better mechanical strength and crack resistance at 250°C. PFA has a wide range of processing stresses and good moulding properties for moulding, extrusion, injection moulding and transfer moulding processes. PFA is very effective against chemical corrosion, penetration and interaction with oxidising acids, organic solvents, inorganic bases, inorganic acids and strong bases (almost all types of corrosive chemicals).
PFA processing methods and temperature range for use
The performance of PFA is as excellent as PTFE, with good thermoplasticity, heat resistance, cold resistance, chemical stability, mechanical and insulating properties, self-lubrication, folding resistance, excellent crack resistance. Not only does it have the same temperature as PTFE, but it also has better mechanical strength at 250°C, good crack resistance, a wide range of processing forces and good moulding properties, suitable for moulding, extrusion, injection moulding and transfer moulding processing.
Chemical resistance and corrosion resistance of PFA
PFA has excellent chemical resistance and corrosion resistance and is very effective against chemical corrosion, penetration and interaction with almost all types of aggressive chemicals such as oxidising acids, organic solvents, inorganic bases, inorganic acids, strong bases etc. The chemical inertness of PFA makes it ideal for applications where ultra-high purity levels are required as it will not leach impurities into your system.