What is the difference between “PTFE” and “PFA”?

Август 2, 2023

Attribute	PFA (Perfluoroalkoxy)	PTFE (Polytetrafluoroethylene)
Material Composition	Copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene	Polytetrafluoroethylene
Appearance	Semi-transparent	Pure white, opaque
Raw Material Shape	Pellet form	Powder form
High-Temperature Resistance	-200°C to +260°C	-200°C to +250°C
Corrosion Resistance	Excellent	Resistant to acids, alkalis, and organic solvents
Electrical Insulation	Excellent	Excellent
Compressive Strength	Good	poor
Elongation at Break	100-300%	5-10%
Dielectric Properties	Excellent	Good
Flame Retardant	V-0 grade	V-0 grade
Main Applications	Manufacturing corrosion-resistant parts, wear-resistant components, seals, insulating parts, medical device components, high-temperature wires, cable insulation layers, anti-corrosion equipment, sealing materials, pump and valve linings, and chemical containers	Used in electrical industry, electrical appliances, chemical, aerospace, and mechanical fields as insulation for wires, corrosion-resistant chemical vessels, cold-resistant oil pipes, fillers, lubricants, etc.