Fluororesin Coating: "What is the difference in fluororesin?"

I will explain the differences between the representative fluororesins "PTFE," "PFA," and "FEP."

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 also excels in non-stick properties and low friction characteristics. ■ 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 sintering. ■ Alternative Name 4F6F, Tetrafluoro-hexafluoropropylene

For detailed information on "Teflon Coating" and "Fluororesin Coating," click here! Yoshida SKT Official Website.

basic information

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 effectively repels water and oil on the surface, making it difficult for dirt to adhere and easy to clean. ■ Heat and Cold Resistance Among resins, it has high heat resistance, enduring high temperatures (up to 260°C) and low temperatures (down to -260°C). ■ Low Friction It has a slippery surface with a low friction coefficient and exhibits excellent lubricity. ■ Chemical Resistance It is rarely affected by or corroded by chemical agents such as acids and alkalis. While a thin coating may not be compromised, chemicals and solutions can penetrate the coating and corrode the substrate, so a thicker coating is recommended to prevent substrate corrosion. ■ Electrical Properties It has high dielectric strength (resistance to electrical breakdown), volume resistivity, and surface resistivity, making it excellent in electrical insulation.