Welcome to Learn 25% Carbon Filled PTFE
Compared to virgin PTFE, 25% carbon filled PTFE sheets, tubes, and rods have a lower coefficient of friction and a higher thermal conductivity. They also have excellent mechanical and wear properties, retain excellent frictional properties, and are an excellent choice for seals and rings in dynamic and high-pressure applications.
Advantages
PTFE on its own has excellent frictional properties, elasticity, and wear resistance but relatively poor mechanical strength and tends to fail in high PV applications. Carbon in itself is a brittle material with poor wear properties and mechanical strength.
Nevertheless, 25% carbon filled PTFE materials offer excellent mechanical and wear properties, provide good thermal conductivity, have low permeability, and are also electrically conductive. They also have a long wear life and excellent extrusion resistance.
Applications
25% carbon filled PTFE sheets, rods, and tubes can be machined into many parts. These parts include pump housings, valve seats, gaskets, roller coverings, shaft bearings, filter housings, etching plates, shaft seals, and slide runners. They find application in chemical engineering, machine parts, transport and conveyor technology, pump and instrument construction, the electrical industry, electronics, laser technology, fume purification, pure water production, cryogenics, filter technology, food, and medical technology.
Typical Physical Properties of 25% Carbon Filled PTFE
| Properties | Test Methods | Unit | Value |
|---|---|---|---|
| Density | ASTM D792 | g/cm3 | 2.25 |
| Hardness Shore D | ASTM D2240 | Sh.D | 65 |
| Tensile strength | ASTM D638 | mpa | 16 |
| Elongation at break 23°C | ASTM D4894 | % | 150 |
| Coefficient of dynamic friction | ASTM D1894 | - | 0.03 |
| Dielectric strength | ASTM D149 | Kv/mm | - |
| Max water absorption | ASTM D570 | % | 0 |
| Working temperature | - | °C | -220 to 260 |