The same and difference between Teflon and PTFE

Update:26-09-2020
Summary:

PVDF is polyvinylidene fluoride, which is slightly wors […]

PVDF is polyvinylidene fluoride, which is slightly worse than F4 and F46. www.qgbxg.com has low temperature resistance and poor corrosion resistance (the price is much cheaper than F4 and F46).
PTFE (F4) is polytetrafluoroethylene, which has good temperature resistance and corrosion resistance, and can withstand the corrosion of any medium. The color is absolutely white. It is generally used for fluorine-lined pipes, valves, seals, bars, etc.
FEP (F46) is polyperfluoroethylene propylene, the color is transparent, and the corrosion resistance is equivalent to PTFE. Generally used for fluorine-lined pumps or perfluorinated pumps
PFA tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (also: perfluoroalkylate, soluble polytetrafluoroethylene)
F4+F46=F50 is a fluoroplastic alloy, this material is also often used in fluoroplastic pumps, they are used together to increase wear resistance

 

The chemical properties of PFA FEP PTFE are similar, but FEP can only be used below 200 degrees Celsius, and PTFE cannot be injection molded.
The full English name of Teflon is Polytetrafluoroetylene, or Teflon, PTFE, F4 for short. Teflon is divided into PTFE, FEP, PFA, ETFE several basic types:
·Teflon PTFE: PTFE (polytetrafluoroethylene) non-stick coating can be used continuously at 260°C, with a maximum use temperature of 290-300°C, extremely low friction coefficient, good wear resistance and excellent chemical stability .
·Teflon FEP: FEP (fluorinated ethylene propylene copolymer) non-stick coating melts and flows to form a non-porous film during baking. It has excellent chemical stability and excellent non-stick characteristics. The maximum use temperature is 200 ℃. ·Teflon PFA: PFA (perfluoroalkyl compound) non-stick coating, like FEP, melts and flows during baking to form a non-porous film. The advantage of PFA is that it has a higher continuous use temperature of 260°C, stronger stiffness and toughness, and is especially suitable for anti-sticking and chemical resistance applications under high temperature conditions.
·Teflon ETFE: ETFE is a copolymer of ethylene and tetrafluoroethylene. This resin is the toughest fluoropolymer. It can form a highly durable coating with excellent chemical resistance. Work continuously at ℃.