Properties :
| 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 |
Note : 1) Data quoted are average values & may vary with source and grade of raw material. 2) Values may be used for design with consideration of factor of safety. 3) Company do not accepts any responsibility of results obtained and infringement of any patents.
