What is the difference between "PTFE" and "PFA"?

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.