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
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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.
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To maximize the performance of manufacturing equipment and machine parts, Yoshida SKT derives the "optimal solution" tailored to our customers from hundreds of surface treatment technologies. - Decreased productivity due to adhesive troubles - Instability in product quality due to friction - Early deterioration of equipment due to corrosion We respond to these challenges in the manufacturing field with our extensive track record and reliable technical expertise. In 1963, we began fluoropolymer processing. In 1968, we signed a licensing agreement with DuPont (now Chemours), supporting manufacturing innovations for over 2,000 customers across various industries, from automotive to medical and aerospace. Furthermore, in 2024, we are focusing on the development of next-generation products, such as PFAS-free coatings, contributing to the advancement of sustainable manufacturing. With a three-base system in Nagoya, Tokyo, and Yamaguchi, we flexibly respond to both mass production and custom orders. Our consistent quality management system ensures that we deliver reliable quality. For solving challenges in the manufacturing field, trust the surface treatment experts at Yoshida SKT.