Perfluoroalkoxy
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| PFA | |
|---|---|
 |
|
| Density[1] | 2150 kg/m3 |
| Flexural modulus(E) | 586 MPa |
| Tensile strength(t) | 24 MPa |
| Elongation @ break | 300% |
| Folding endurance | No break |
| Notch test | |
| Melting point | 305 °C |
| Maximum operating | |
| temperature | 260 °C |
| Water absorption (ASTM) | <0.03 % after 24 hours |
| Dielectric constant (Dk) | |
| at 1MHz | 2.1 |
| Dissipation factor | |
| at 1MHz | 0.0001 |
| Arc resistance | < 180 seconds |
| Resistivity at 50% R.H. | > 1016 Ω m |
Perfluoroalkoxy, Teflon-PFA, or PFA is a type of fluoropolymer with properties similar to polytetrafluoroethylene (PTFE). It differs from the PTFE resins in that it is melt-processable using conventional injection molding and screw extrusion techniques.
PFA was invented by DuPont and is sold under the brandname Teflon-PFA. Teflon is better known as the trade name for a polymer with similar properties, PTFE. Similar product is available from Daikin using a brandname of Neoflon-PFA.
PFA is very similar in composition to the fluoropolymers PTFE and FEP (fluorinated ethylene-propylene). PFA and FEP both share PTFE's useful properties of low coefficient of 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]
[edit] Notes
- ^ PTFE, FEP, and PFA Specifications. Boedeker Corp (2007). Retrieved on 2007-12-22.
- ^ FEP Detailed Properties Parker-TexLoc, 13 April 2006. Retrieved 10 September 2006.
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