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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