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Contact Supplier| Property | Unit | Test Method | Virgin PTFE | 25% Glass Filled PTFE | 15% Glass +5%MoS2 Filled PTFE | 25% Carbon Filled PTFE | 15% Graphite Filled PTFE | 40% Bronze Filled PTFE |
|---|---|---|---|---|---|---|---|---|
| PHYSICAL | ||||||||
| Density | gm/cm³ | ASTM D-792 | 2.1 - 2.2 | 2.24 - 2.25 | 2.23 - 2.24 | 2.12 - 2.14 | 2.14 - 2.16 | 3.1 - 3.2 |
| Water Absorption | 24 hrs (%) | ASTM D-570 | <0.01 | 0.013 | 0.015 | 0.05 | 0 | 0 |
| MECHANICAL | ||||||||
| Tensile Strength | kgf/cm² | ASTM D-638 | 210 - 350 | 125 - 200 | 150 - 220 | 120 - 155 | 150 - 200 | 125 - 150 |
| Elongation of Break | % | ASTM D-638 | 250 - 400 | 200 - 300 | 220 - 320 | 100 - 150 | 175 - 225 | 100 - 175 |
| Compressive Strength | kgf/cm² | ASTM D-695 | 40 - 50 | 75 - 85 | 65 - 75 | 75 - 85 | 65 - 75 | 85 - 100 |
| Compressive Modulus | kgf/cm² | ASTM D-695 | 4000 | 7000 | 6000 | 8400 | 8000 | 8500 |
| Deformation under load | ||||||||
| A. 24 Hrs. 23°C 113 kg/cm² | % | ASTM D-621 | 15 | 11 | 12 | 7 | 8 | 6 |
| B. 2 Hrs. 150°C 113 kg/cm² | 55 | 50 | 50 | 35 | 43 | 42 | ||
| Flexural Strength | kgf/cm² | ASTM D-790 | 57 | 42 | 50 | 96 | 60 | 85 |
| Flexural Modulus | kgf/cm² | ASTM D-790 | 3500-6300 | 16700 | 20000 | 11900 | 11000 | 14000 |
| Impact Strength (+20°C) | cmkgf/cm² | ASTM D-256 | 15 | 11 | 12 | 10 | 14 | 9 |
| Hardness | Shore-D | ASTM D-2240 | 52 - 58 | 58 - 63 | 60 - 65 | 60 - 65 | 60 - 65 | 63 - 68 |
| Co-efficient of Friction | ||||||||
| A. Dynamic P-7 kg/cm² V-0.5 m/s | - - - | - - - | 0.04 - 0.06 | 0.5 - 0.54 | 0.15 - 0.20 | 0.12 - 0.17 | 0.11 - 0.16 | 0.11 - 0.15 |
| B. Static P-35 kg/cm² | 0.05 - 0.08 | 0.11 - 0.13 | 0.08 - 0.01 | 0.09 - 0.11 | 0.08 - 0.10 | 0.08 - 0.10 | ||
| Brittleness Temp. at Atm. Pressure | °C | - - - | -200 | |||||
| THERMAL | ||||||||
| Melting Temperature | °C | ASTM D-3418 | 335 | |||||
| Use Temp. at Atm. Pressure | °C | - - - | -250 to +260 | |||||
| Thermal Conductivity | 10-4cal/cm S°c | Cenco Fitch | 6 | 9 | 9 | 13 | 14 | 17 |
| ELECTRICAL | ||||||||
| Dielectric Strength | Kv/mm | ASTM D-149 | 24 | 12 | 16 | 2 | 2 | Conductive |