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PTFE TEFLON
Glass Fiber Teflon
Glass Fiber Teflon
Glass Fiber Teflon is reinforced with 15% and 25% glass fibre according to the application requirement.
Usage Areas
Seals, seal rings, gaskets, valve sets, piston rings, bearings.
Mechanical Properties
| Specifications | Test ASTM | C15 | C25 |
|---|---|---|---|
| Tensile Strength (At Break) Kg/cm² | D638 | 175-260 | 150-240 |
| Elongation at break 23°C (%) | D638 | 250-280 | 200-270 |
| Compressive Strength (1% Deformation), 23°C (Kg/cm²) | D695 | 60-65 | 65-70 |
| Deformation Under Load (140 kg/cm, 24 hours, 23 °C)(%) | D621 | ||
| Total Deformation(%) | D621 | 11-15 | 9.5-13.5 |
| Permanent Deformation(%) | D621 | 6-8 | 4-8 |
| Total Deformation Under Load(%) | |||
| 10 kg/cm² load, 150 °C, 24 hours(%) | 2.8-3 | 2.6-2.8 | |
| 50 kg/cm² load, 150 °C, 24 hours(%) | 18-19 | 15-16 | |
| Impact Strength (Izod, notched)(Kj/m²) | D256 | 14-15.5 | 12-15 |
| Hardness (Shore D) | D2240 | 60-64 | 64-68 |
Physical Properties
| Specifications | C15 | C25 |
|---|---|---|
| Specific Gravity 23°C (gr/cm³) | 2.15-2.25 | 2.2-2.3 |
| Coefficient of Friction, Static | 0.05 | 0.07 |
| Coefficient of Friction, Dynamic | 0.06 | 0.09 |
| PV Limits | ||
| 3 m/min (Kg.cm/cm².min) | 210-215 | 215-220 |
| 30 m/min (Kg.cm/cm².min) | 250-270 | 270-300 |
| 300 m/min (Kg.cm/cm².min) | 310-320 | 330-340 |
Thermal Properties
| Specifications | Test ASTM | C15 | C25 |
|---|---|---|---|
| Specific Heat (Kcal/kg.°C) | - | - | |
| Thermal Conductivity (x10^-4) 30°C (Cal/cm.sec.°C) | 8-9 | 10-11 | |
| Coefficient of Expansion (x10^-5) (°C^1) | D696 | ||
| 25°C-100 °C | D696 | 12-14.5 | 7-11.5 |
| 25°C-200 °C | D696 | 9-16 | 7.5-14 |
| 25°C-300 °C | D696 | 15-18 | 8.5-18 |
| Operating Temperature, Minimum (°C) | -260 | -260 | |
| Operating Temperature, Maximum (°C) | +270 | +270 |
Electrical Properties
| Specifications | Test ASTM | C15 | C25 |
|---|---|---|---|
| Dielectric Strength, 0.1 mm short time (Kv/mm) | D149 | 16-19 | 13-16 |
| Dielectric Constant, 50 Hz-10 Hz | D150 | 2.3-2.5 | 2.5-2.8 |
| Volumetric Resistance, 23°C (Ohm-cm) | D257 | > 10¹³ | > 10¹³ |
| Surface Resistance, 23°C 50% Relative Humidity (Ohm) | D257 | > 10¹⁵ | > 10¹⁵ |
| Dielectric Loss Factor, 50 Hz, 23 °C (dry environment) | D150 | 0.00075 | 0.0007 |
