What is PTFE? What is Teflon™?

PTFE stands for PolyTetraFluoroEthylene, a synthetic fluoropolymer of tetrafluoroethylene with an enormous number of applications. PolyTetraFluoroEthylene is the chemical term for the polymer (C2F4)n.
Teflon™ is a registered trademark and a brand name (Teflon ®) owned by Chemours (formally DuPont) and is used on a range of products. Teflon™ is not a specific chemical or product name.

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Download here:Teflon （PTFE）PCB Material specification