Teflon® is a brand name for polytetrafluoroethylene (PTFE), a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications. Other trade names for PTFE include Fluorosint®, Interplast, Rulon®, and Semitron® ESD.
| Virgin Teflon | 25% Glass-Reinforced Teflon | Fluorosint 207 | Fluorosint 500 | Semitron ESD500 | |||
| Mechanical | ASTM Test Method | Polytetra-fluoroethylene | 25% GF Polytetra-fluoroethylene | FDA Synthetic Mica-Filled PTFE | Synthetic Mica-Filled PTFE | Electrostatic Dissapative PTFE | Units |
|---|---|---|---|---|---|---|---|
| Strength to Weight Ratio | - | - | - | - | - | - | ksi |
| Specific Gravity @73 F | D792 | 2.13 | 2.2 | 2.30 | 2.32 | 2.3 | - |
| Tensile Strength @73 F, (ult)/(yld) | D638 | 4.500 (ult) | 2,800 (ult) | 1,500 | 1,100 | 1,500 | psi |
| Tensile Modulus of Elasticity @73 F | D638 | - | - | 250,000 | 300,000 | 250,000 | psi |
| Tensile Elongation at Break @73 F | D638 | 400 | 325 | 50 | 10 | 50 | % |
| Flexural Strength @73 F | D790 | - | - | 2,000 | 2,200 | 2,200 | psi |
| Flexural Modulus of Elasticity @73 F | D790 | 50,000-90,000 | - | 350,000 | 500,000 | 350,000 | psi |
| Shear Strength @73 F | D732 | - | - | 1,700 | 2,100 | 1,700 | psi |
| Comprehensive Strength, (% Deformation) @73 F | D695 | 600 (1) | 1,000 (1) | 3,800 (10) | 4,000 (10) | 3,800 (10) | psi |
| Comprehensive Modulus of Elasticity @73 F | D695 | - | - | 225,000 | 250,000 | 225,000 | psi |
| Hardness, Rockwell, Scale as noted @73 F | D785 | - | - | (R50) | (R55) | (R50) | - |
| Hardness, Durometer, Shore D @73 F | - | D55 | D54 | D65 | D70 | D65 | - |
| Izod Impact, (Notched) @73 F | D256 Type A | 3.0 | - | 1.0 | 0.9 | 1.0 | ft-lb/in of notch |
| Coefficient of Friction, (Dry vs Steel) Dynamic | - | 0.05 - 0.08 | 0.10 - 0.13 | 0.17 | 0.18 | 0.17 | - |
| Limiting PV, (with 4 to 1 factor of safety applied) | - | - | - | 8,000 | 8,000 | 8,000 | psi-ft/min |
| Thermal | ASTM Test Method | Polytetra-fluoroethylene | 25% GF Polytetra-fluoroethylene | FDA Synthetic Mica-Filled PTFE | Synthetic Mica-Filled PTFE | Electrostatic Dissapative PTFE | Units |
|---|---|---|---|---|---|---|---|
| Coefficient of Linear Thermal Expansion @73 F | E-831 (TMA) | 7.0 E-05 | 3-8 E-05 | 5.7 E-05 | 2.4 E-05 | 5.7 E-05 | in/in/F |
| Heat Deflection Temperature @264 psi | D648 | 115 | - | 210 | 270 | 210 | F |
| Tg-Glass transition termperature, (Amorphous) | D3418 | - | - | - | - | - | F |
| Melting Point, (VS=Vicat Softening Temp.) | D3418 | 621 | 621 | 621 | 621 | 621 | F |
| Continuous Service Temperature in Air, (Max.) | - | 500 | 500 | 500 | 500 | 500 | F |
| Thermal Conductivity | - | 1.70 | 2.60 | - | 5.30 | - | BTU-in/hr-ft2-F |
| Electric | ASTM Test Method | Polytetra-fluoroethylene | 25% GF Polytetra-fluoroethylene | FDA Synthetic Mica-Filled PTFE | Synthetic Mica-Filled PTFE | Electrostatic Dissapative PTFE | Units |
|---|---|---|---|---|---|---|---|
| Dielectric Strength, Short Term | D149 | 600 | - | 200 | 275 | - | Volts/mil |
| Volume Resistivity | D257 | >10 E+18- | - | >1E13 | >1E14 | 1E11 - 1E13 | ohm-cm |
| 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 | - |
| H2O | ASTM Test Method | Polytetra-fluoroethylene | 25% GF Polytetra-fluoroethylene | FDA Synthetic Mica-Filled PTFE | Synthetic Mica-Filled PTFE | Electrostatic Dissapative PTFE | Units |
|---|---|---|---|---|---|---|---|
| Water Absorption, Immersion, 24 hours | D570(7) | 0.00 | - | 0.03 | 0.10 | 0.03 | % by weight |
| Water Absorption, Saturation | D570(7) | - | - | 2.00 | 3.00 | 2.00 | % by weight |