PFA is close to PTFE in chemical and thermal resistance, but with better mechanical properties than PTFE. It has unequalled chemical inertness, high heat resistance, toughness and flexibility. Low moisture absorption, non-flammability and exceptional dielectric properties uniquely qualify PFA for applications that cannot utilize any other material. Although at room temperatures PFA and FEP are similar in performance, PFA has a higher service temperature ( 260oC) than FEP.
PFA – Perfluoroalkoxy (vinyl ether) - TYPICAL PROPERTIES
| Property | Value | Units | Method |
| MECHANICAL PROPERTIES | |||
| Tensile Strength, 73°F | 4060 - 4500 28 to 31 |
psi MPa |
|
| Elongation, 73°F | 260 - 300 | % | |
| Flexural Strength, 73°F | No break at flexure | D 790 | |
| Impact Strength, Izod | No break | ||
| Compressive Stress at 1% deformation, | MPa | D 695 | |
| Yield Strength At 23 deg C |
1740 12 |
psi MPa |
|
| Density (as polymerized) |
2.12 to 2.17 | gm/cu.cm | |
| THERMAL PROPERTIES | |||
| Coefficient
of Linear Expansion 20 to 100 deg C |
12 x 10-5 | K-1 | |
| Melting Point | 487 - 540 253 - 282 |
deg F deg C |
|
| Thermal Conductivity | 1.450.209 | Btu/hr-.ft-deg
F W/m/deg K |
ASTM C 177 |
| Specific Heat | 0.25 1.047 |
Btu/lb/deg
F kJ/Kg/deg K |
|
| Heat Distortion Temperature, 66 lb/sq.in (0.455 MPa) | 158 to 171 70 - 77 |
deg F deg C |
D 648 |
| Service Temperature | -418 to 403 -250 to 206 |
deg F deg C |
|
| Processing Temperature | 698 - 743 370 - 395 |
deg F deg C |
|
| ELECTRICAL PROPERTIES | |||
| Dielectric
Strength, short time, 0.080” |
MV m-1 | ||
| Surface Arc-Resistance | >300 (does not track) | sec | D 495 |
| Volume Resistivity, dry, @ 50% RH | >1018 | ohm-cm | D 257 |
| Surface Resistivity, @ 100% RH | 1016 | ohm/sq. | |
| Dielectric Constant 1kHz to 1GHz | 2.06 | ε | D150-81 |
| Dielectric Strength | 78.8* | kV mm-1 | D149 |
| Dissipation Factor @ 60 Hz - 1 MHz | <0.0001 | D150-81 | |
| OTHER PROPERTIES | |||
| Refractive Index | 1.344 | nD 25 | D 542 |
| Water Absorption | <0.1 | % | D570-81 |
| Flame Rating+ | VE-0 | UL-94 | |
| Limiting Oxygen Index | 95 | % Oxygen | D 2863 |
| Resistance to Weathering | Excellent | ||
| Specific Gravity | 2.12-2.17 | D792-66 (1979) | |
| Static coefficient of friction | 0.05-0.08 | ||
| CO2 Permeability | 273 | Ng cm m-2 s-1 | |
| O2 Permeability | 637 | Ng cm m-2 s-1 | |
| N2 Permeability | 91 | Ng cm m-2 s-1 | |
+ Numerical rating for flame spread is not intended to reflect hazards presented by this or any other material under actual fire conditions
NOTE: The information, recommendations and opinions contained herein is only a guide and is intended solely for your consideration, inquiry and verification. The suitability of any material under specific conditions of application is not guaranteed in any manner. Fluorotherm Polymers Inc does not assume legal responsibility for the use of data presented here in any form, under any circumstances, any application, test or communication. Nothing contained herein is to be interpreted as a license or authorization to operate under or infringe any patent.