There are many, and each factory produces different grades with different properties. Teflon also covers many major categories, such as: PTFE (polytetrafluoroethylene), FEP (fluorinated ethylene propylene polyethylene) Material) PFA (perfluoroalkylate)...

DuPont's Teflon (Teflon) trademark is mainly used on the following products: PTFE, FEP, PFA, ETFE, AF, NXT, FFR is just a type, and there are also subdivided models! I definitely can’t explain clearly with examples. In short, it is the same as nylon. PA nylon is subdivided into PA6 PA66 PA46 PA6T and the like, and there are also model numbers in it! You can just refer to it! Specific product design must be based on performance to find brands with similar performance!