WHAT’S THE DIFFERENCE?
PTFE: Very high operating temperatures and lowest surface energy of fluoropolymers. Shows good abrasion resistance, chemical resistance, and release properties. High operating temperatures as well ( ≈ 500°F )
ETFE: Excellent chemical resistance in a high-build format ( up to 80 mils thickness ). Also shows better hardness than PTFE but with a lower operating temperature ( ≈ 300°F )
FEP: High release fluoropolymer makes a great non-stick coating. Good chemical resistance and low coefficient of friction as well. Operating temperatures are fairly high also. ( ≈ 400°F )
PFA: Slightly better hardness than PTFE with a high-build option ( up to 40 mils thickness ). Used in a wide variety varety of non-stick applications due to its versatile properties, excellent chemical resistance and high temperature resistance. ( ≈ 500°F )