Fluorinated ethylene propylene
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| FEP | |
|---|---|
| Density[1] | 2150 kg/m3 |
| Flexural modulus(E) | 586 MPa |
| Tensile strength(t) | 23 MPa |
| Elongation @ break | 325% |
| Folding endurance | Varies |
| Notch test | |
| Melting point | 260 °C |
| Maximum operating | |
| temperature | 204 °C |
| Water absorption (ASTM) | <0.01 % after 24 hours |
| Dielectric constant (Dk) | |
| at 1MHz | 2.1 |
| Dissipation factor | |
| at 1MHz | 0.0007 |
| Arc resistance | < 300 seconds |
| Resistivity at 50% R.H. | > 1016 Ω m |
Fluorinated ethylene propylene, Teflon-FEP, or FEP is a copolymer of hexafluoropropylene and tetrafluoroethylene. It differs from the PTFE (polytetrafluoroethylene) resins in that it is melt-processible using conventional injection molding and screw extrusion techniques. Fluorinated ethylene propylene was invented by DuPont and is sold under the brandname Teflon-FEP. Similar product is available from Daikin with the brand name of Neoflon-FEP.
FEP is very similar in composition to the fluoropolymers PTFE (polytetrafluoroethylene) and PFA (perfluoroalkoxy polymer resin). FEP and PFA both share PTFE's useful properties of low friction and non-reactivity, but are more easily formable. FEP is softer than PTFE and melts at 260 °C; it is highly transparent and resistant to sunlight.[2][3]
[edit] References
- ^ PTFE, FEP, and PFA Specifications. Boedeker Corp (2007). Retrieved on 2007-12-22.
- ^ Teflon FEP. DuPont. Retrieved on 2007-10-17.
- ^ FEP Detailed Properties. Parker-TexLoc (13 Apr 2006). Retrieved on 2006-09-10.
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