What are the differences between fluoropolymer coatings: PTFE, PFA, and FEP?

We will introduce the differences between fluoropolymer PTFE, PFA, and FEP.

Differences in Types and Characteristics of Representative Resins for Teflon Coating and Fluororesin Coating ■ Resin Name PTFE (Polytetrafluoroethylene) ■ Characteristics It has the highest continuous use temperature of 260°C, and in addition to heat resistance, it excels in non-stick and low friction properties. ■ Alternative Name Tetrafluoroethylene, 4F ■ Resin Name PFA (Perfluoroalkoxyalkane Polymer) ■ Characteristics An improved resin of PTFE, it has the same continuous use temperature of 260°C as PTFE. It has a low thermal melt viscosity, allowing for a continuous coating with fewer pinholes that could not be achieved with PTFE, making it the best-performing fluororesin for corrosion-resistant coatings. Additionally, PFA is superior in non-stick properties compared to PTFE for certain applications, making it suitable for high-temperature release coatings. ■ Resin Name FEP (Perfluoroethylene Propylene Copolymer) ■ Characteristics An improved resin of PTFE, but with lower heat resistance than PTFE. It can achieve a smooth coating with fewer pinholes through firing. ■ Alternative Name 4F6F, Tetra-hexafluoride

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basic information

- Teflon(TM) Coating, Functions and Effects of Fluororesin Coating ■ Non-stick Property It has good release properties against strongly adhesive substances, meaning it does not stick or is difficult to stick. ■ Water and Oil Repellency It repels water and oil well when they come into contact with the surface. Therefore, it is resistant to dirt and can be easily cleaned. ■ Heat and Cold Resistance Among resins, it has high heat resistance, enduring high temperatures (up to 260°C). It also withstands low temperatures down to -260°C. ■ Low Friction It has a slippery surface with a low friction coefficient. Additionally, it exhibits excellent lubricity. ■ Chemical Resistance It is rarely affected or corroded by chemical substances such as acids and alkalis. While a thin coating is not compromised, chemicals and solutions can penetrate the coating and corrode the substrate, so a thicker coating is applied to prevent substrate corrosion. ■ Electrical Properties It has high insulation strength (dielectric breakdown strength), volume resistivity, and surface resistivity, providing excellent electrical insulation. *For more details, please click on "PDF Download" or feel free to contact us.