When engineers select tubing for high-friction, high-load contact surfaces, standard unfilled PTFE often suffers from cold flow, poor heat dissipation, and rapid wear. A PTFE tube 20% carbon filled solves this problem by embedding 20% carbon fiber or carbon powder into the PTFE matrix. The result is a material that maintains PTFE’s chemical resistance and non-stick properties while increasing compressive strength, reducing deformation under load, and carrying frictional heat away from the sliding interface. In high-load bushings, valve stems, linear guides, and rotating shafts, carbon filled PTFE tubing high load provides measurable gains in service life and dimensional stability. Buyers who need consistent quality from a high performance carbon PTFE tube supplier rely on controlled blending, isostatic molding, and post-cure inspection to avoid voids and delamination. The 20% carbon fiber PTFE tube is specifically formulated for applications where friction, load, and chemical exposure must be managed together.
The 20% Carbon PTFE Tube uses a uniform 20% carbon fiber dispersion by weight, not a surface coating. Because the carbon is distributed through the entire wall thickness, wear resistance remains stable even after machining or repeated sliding contact. The product is available in round tubes with tight outside diameter and wall thickness tolerances, and it can be supplied as stock lengths, cut sleeves, or machined components. For high-friction applications, the carbon phase reduces adhesive wear and prevents the rapid creep that typically limits virgin PTFE bushings under edge loading. The tube also dissipates frictional heat better than unfilled PTFE, helping maintain clearance and hardness at elevated operating temperatures.
| Property | Test Method | Typical Value |
|---|---|---|
| Carbon content | Internal QC | 20 % ± 2 % by weight |
| Specific gravity | ASTM D792 | 2.06 g/cm³ |
| Tensile strength | ASTM D4894 | 20 MPa |
| Elongation at break | ASTM D4894 | 80 % |
| Compressive strength at 10% deformation | ASTM D695 | 26 MPa |
| Hardness | ASTM D2240 | 65 Shore D |
| Dynamic coefficient of friction | ASTM D1894 | 0.20 – 0.24 |
| Continuous service temperature | Internal QC | -156 °C to 260 °C |
| Thermal conductivity | ASTM E1530 | 0.52 W/m·K |
| Water absorption | ASTM D570 | < 0.03 % |
| Wear factor K | ASTM D3702 | 4 × 10⁻⁶ mm³/N·m typical |
| Product Code | Outside Diameter | Inside Diameter | Wall Thickness | Standard Length | OD/Wall Tolerance |
|---|---|---|---|---|---|
| PC20-04-02 | 4 mm | 2 mm | 1 mm | 1000 mm | ±0.05 mm |
| PC20-08-05 | 8 mm | 5 mm | 1.5 mm | 1000 mm | ±0.05 mm |
| PC20-16-10 | 16 mm | 10 mm | 3 mm | 1000 mm | ±0.07 mm |
| PC20-25-18 | 25 mm | 18 mm | 3.5 mm | 1000 mm | ±0.08 mm |
| PC20-50-40 | 50 mm | 40 mm | 5 mm | 500 mm | ±0.10 mm |
| PC20-100-80 | 100 mm | 80 mm | 10 mm | 300 mm | ±0.15 mm |
