Performance | Measurement unit | PFA | PTFE | FEP | ||
Specific gravity | / | 2.12-2.17 | 2.13-2.20 | 2.12-2.17 | ||
Forming contract rate | % | 4 | 3-6 | 3-6 | ||
Hardness | shore-D | 64 | 50-60 | 56 | ||
Breakage tensile strength | kg/cm2 | 280-315 | 140-455 | 189-217 | ||
Breakage elongation rate | % | 300 | 200-450 | 250-330 | ||
Buckling strength | kg/cm2 | / | No break | 210 | ||
Buckling modulus | kgcm2 | 7000 | 4900-7700 | 6300 | ||
Notch shock strength | kgcm/cm | No break | 16.3 | No break | ||
Melting point | ℃ | 310 | 327 | 275 | ||
Heat resisting temperature for long time | ℃ | 260 | 288 | 204 | ||
Heat deformation temperature | ℃(18.5kg/cm2) | / | 49 | / | ||
℃(4.6kg/cm2) | 74 | 121 | 70 | |||
Brittle point | ℃ | / | -268 | -73 | ||
Thermal expanding coefficient | 10mcm/cm℃ | 21.6 | 18 | 14.4-19.8 | ||
Dielectric constant | 10²Cycle | 2.1 | 2.1 | 2.1 | ||
Medium loss coefficient | 10²Cycle | 0.0002 | 0.0003 | 0.0001 | ||
Electric arc resisting | second | / | 200 | 165 | ||
Moisture osmosis comparing | *in these comparing, number 1 to 6 means the feature degree from good to bad. | 5 | 4 | 4 | ||
Friction coefficient comparing | 2 | 1 | 3 | |||
Weight comparing of unit volume | 4 | 5 | 4 | |||
Inject foming comparing | 5 | / | 4 | |||
Wire forming comparing | 4 | / | 3 | |||
Liquid plastic forming comparing | / | / | / | |||
Sink plastic forming comparing | / | / | 3 | |||
Blowing forming comparing | / | / | 3 | |||
Wear resisting feature comparing | 6 | 4 | 5 | |||
Mechining character comparing | / | Excellent |