Perfluoroalkoxyethylene
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Perfluoroalkoxyethylene (PFA)
Contents |
Advantages
Melt processable, has similar chemical resistance to PTFE combined with the highest temperature resistance of melt processable fluoro plastics. Self-extinguishing. Retains room temperature stiffness and strength at elevated temperatures better than FEP. Excellent toughness.
Disadvantages
Stiffness and strength similar to those of PTFE at room temperature. More expensive than PTFE.
Typical Properties
Density (g/cm3). 16
Surface Hardness SD60
Tensile Strength (MPa) 29
Flexural Modulus (GPa) 0.7
Notched Izod (kJ/m)1.06+
Linear Expansion (/°C x 10-5) 21
Elongation at Break (%) 300
Strain at Yield (%) 85
Max. Operating Temp. (°C) 170
Water Absorption (%) 0.03
Oxygen Index (%) 95
Flammability UL94 V0
Volume Resistivity (log ohm.cm) 18
Dielectric Strength (MV/m) 45
Dissipation Factor 1kHz 0.0002
Dielectric Constant 1kHz 2.1
HDT @ 0.45 MPa (°C) 74
HDT @ 1.80 MPa (°C) 30
Material. Drying hrs @ (°C) NI
Melting Temp. Range (°C) 360 - 420
Mould Shrinkage (%) 4
Mould Temp. Range (°C) 50 - 250
Applications
Heater cables, chemically resistant linings for pumps and pipes etc. that require a higher temperature resistance.
