10% Carbon Filled PTFE
10% Carbon Filled PTFE sheets, rods and tubes. It has low wear when lubricated with water.
Description
10% carbon-filled PTFE is a high-performance plastic composite that blends virgin PTFE with 10% carbon fibre or powder. It has lower deformation under load and excellent thermal and electrical conductivity when compared to unfilled PTFE. It is suitable for piston rings, pump wear rings, valve seats, and seals.
The most common carbon percentages in PTFE are 10%, 15%, 20%, and 25%.
Key Advantages
10% carbon-filled PTFE has many advantages which make it a popular material for machined seals.
Superior Wear Resistance
It has a lower coefficient of friction and higher wear resistance than glass-filled alternatives.
Enhanced Dimensional Stability
Higher compressive strength and significantly reduced creep (cold flow) under load.
Electrical & Thermal Conductivity
The carbon additive makes the material electrically and thermally conductive, helping dissipate frictional heat.
Chemical Resistance
Highly inert, though it is not recommended for environments with elemental alkali metals or highly concentrated fluorines
Physical Properties of Carbon Filled PTFE
| Properties | Test Methods | Unit | 10% Carbon | 15% Carbon | 25% Carbon |
|---|---|---|---|---|---|
| Density | ASTM D792 | g/cm3 | 2.18 | 2.15 | 2.12 |
| Hardness Shore D | ASTM D2240 | Sh.D | 60 | 62 | 65 |
| Tensile strength | ASTM D638 | mpa | 21 | 19 | 16 |
| Elongation at break 23°C | ASTM D4894 | % | 230 | 200 | 150 |
| Coefficient of static friction | ASTM D1894 | - | 0.12 | 0.15 | 0.25 |
| Dielectric strength | ASTM D149 | Kv/mm | - | - | - |
| Max water absorption | ASTM D570 | % | 0 | 0 | 0 |
| Working temperature | - | °C | -220 to 260 | -220 to 260 | -220 to 260 |
