The difference between PTFE, PFA, FEP, ETFE
Teflon FEP: FEP
PTFE polytetrafluoroethylene (also known as PTEF), PFA tetrafluoroethylene and perfluoroalkoxy vinyl ether copolymer (also known as: perfluoroalkylate), FEP fluorinated ethylene propylene copolymer (also known as F46, It is a copolymer of tetrafluoroethylene and hexafluoropropylene), a copolymer of ETFE ethylene and tetrafluoroethylene (commonly known as polyvinyl fluoride). Heat resistance from large to small is PTFE 260 ° C or more; PFA 260 ° C; FEP 200 ° C; ETFE 150 ° C
Teflon is divided into PTFE, FEP, PFA, ETFE basic types:
Teflon PTFE: PTFE (polytetrafluoroethylene) non-stick coating can be used continuously at 260 ° C, with a maximum operating temperature of 290-300 ° C, very low friction coefficient, good wear resistance and excellent chemical stability.
Teflon FEP: FEP (fluorinated ethylene propylene copolymer) non-stick coating melts and forms a non-porous film during baking. It has excellent chemical stability and excellent non-stick properties. The maximum operating temperature is 200 °C.
Teflon PFA: PFA (perfluoroalkylate) non-stick coating melts and forms a non-porous film during baking, just like FEP. The advantage of PFA is that it has a higher continuous use temperature of 260 ° C and stronger toughness. It is especially suitable for use in the field of anti-adhesion and chemical resistance under high temperature conditions.
Teflon ETFE: ETFE is a copolymer of ethylene and tetrafluoroethylene. It is the toughest fluoropolymer and can form a highly durable coating with excellent chemical resistance and can be used at 150 ° C. Work continuously.