FEP is a copolymer of TFE and HFP. It retains most of the desirable properties of PTFE, but the melt viscosity is low enough for conventional melt processing, and the melting point of FEP is 260 ° C, while the first melting point of PTFE is 340 ° C. The continuous operating temperature of FEP is 205â??, while that of PTFE is 260 FEP resins are available in a variety of grades to meet a variety of processing and end-use requirements. Different grades of FEP differ mainly in terms of molecular weight, but they all have the same use temperature, electrical properties, and chemical resistance. With the increase of molecular weight and melt viscosity, the mechanical properties and pressure cracking resistance also increase. However, these improvements come at the cost of processing difficulty and processing speed. Everflon offers improved grades that provide a better combination of pressure cracking resistance and processing speed
