What we do:
Teflon Specs
| Virgin Teflon | 25% Glass Reinforced Teflon | Fluorosint 207 | Fluorosint 500 | Semitron ESD500 | ||||
| Units | ASTM Test Method | Polytetrafluoro-ethylene | 25% Glass Filled Polytetrafluoro-ethylene | FDA Synthetic Mica-Filled PTFE | Synthetic Mica-Filled PTFE | Electrostatic Dissapative PTFE | ||
| MECHANICAL | Strength to Weight Ratio | ksi | - | |||||
| Specific Gravity @73 F | - | D792 | 2.16 | 2.22 | 2.30 | 2.32 | 2.30 | |
| Tensile Strength @73 F, (ult)/(yld) | psi | D638 | 4500 (ult) | 2800 (ult) | 1500 | 1100 | 1500 | |
| Tensile Modulus of Elasticity @ 73 F | psi | D638 | - | - | 250000 | 300000 | 250000 | |
| Tensile Elongation at Break @ 73 F | % | D638 | 400 | 325 | 50 | 10 | 50 | |
| Flexural Strength @ 73 F | psi | D790 | - | - | 2000 | 2200 | 2200 | |
| Flexural Modulus of Elasticity @ 73 F | psi | D790 | 50000-90000 | - | 350000 | 500000 | 350000 | |
| Shear Strength @ 73 F | psi | D732 | - | - | 1700 | 2100 | 1700 | |
| Compressive Strength, (% Deformation) @73 F | psi | D695 | 600 (1) | 1000 (1) | 3800 (10) | 4000 (10) | 3800 (10) | |
| Compressive Modulus of Elasticity @73 F | psi | D695 | - | - | 225000 | 250000 | 225000 | |
| Hardness, Rockwell, Scale as noted @73 F | - | D785 | - | - | (R50) | (R55) | (R50) | |
| Hardness, Durometer, Shore D @73 F | - | D2240 | D55 | D54 | D65 | D70 | D65 | |
| Izod Impact, (Notched) @73 F | ft-lb/in of notch | D256 TypeA | 3.0 | - | 1.0 | 0.9 | 1.0 | |
| Coefficient of Friction, (Dry vs. Steel) Dynamic | - | - | .05-.08 | .10-.13 | 0.17 | 0.18 | 0.17 | |
| Limiting PV, (with 4 to 1 factor of safety applied) | psi-ft/min | - | - | - | 8000 | 8000 | 8000 | |
| THERMAL | Coefficient of Linear Thermal Expansion @73 F | in/in/F | E-831 (TMA) | 7.0E-05 | 3-8E-05 | 5.7E-05 | 2.4E-05 | 5.7E-05 |
| Heat Deflection Temperature @ 264 psi | F | D648 | 115 | - | 210 | 270 | 210 | |
| Tg-Glass transition temperature, (Amorphous) | F | D3418 | - | - | - | - | - | |
| Melting Point, (VS=Vicat Softening Temp.) | F | D3418 | 621 | 621 | 621 | 621 | 621 | |
| Continuous Service Temperature in Air, (Max.) | F | - | 500 | 500 | 500 | 500 | 500 | |
| Thermal Conductivity | BTU-in/hr-ft2-F | - | 1.70 | 2.60 | - | 5.30 | - | |
| ELECTRICAL | Dielectric Strength, Short Term | Volts/mil | D149 | 600 | - | 200 | 275 | - |
| Volume Resistivity | ohm-cm | D257 | >10E+18 | - | >1E13 | >1E14 | 1E11-1E13 | |
| Dielectric Constant @ 10E6 Hz | - | D150 | - | - | 2.7 | 2.9 | - | |
| Dissipation Factor @ 10E6 Hz | - | D150 | - | - | 0.008 | 0.008 | - | |
| Flammability @ 3.1 mm unless noted | - | UL94 | V-0 | - | V-0 | V-0 | V-0 | |
| H20 | Water Absorbtion, Immersion, 24 Hrs | % by wt. | D570(7) | 0.00 | - | 0.03 | 0.10 | 0.03 |
| Water Absorbtion, Saturation | % by wt. | D570(7) | - | - | 2.00 | 3.00 | 2.00 |