Carbon Filled PTFE Sheet is a reinforced engineering PTFE plate developed to provide higher wear resistance, improved dimensional stability and better load performance compared to virgin PTFE. It is widely used for CNC-machined parts, bushings, bearings, rings and mechanical components operating under continuous friction, pressure and elevated temperatures.
What is Carbon Filled PTFE Sheet?
Carbon Filled PTFE Sheet is an engineered thermoplastic material produced by compounding
polytetrafluoroethylene (PTFE) with a controlled percentage of carbon filler.
This reinforcement significantly improves wear resistance, compressive strength and dimensional stability
while maintaining PTFE’s low friction and chemical resistance.
This grade is specifically selected where virgin PTFE is too soft and prone to creep (cold flow),
especially in mechanical components exposed to continuous load, sliding motion and thermal cycling.
Key Engineering Properties
- Excellent wear resistance: ideal for sliding and friction-loaded components.
- Improved dimensional stability: reduced deformation under mechanical load.
- Enhanced creep resistance: better long-term performance compared to virgin PTFE.
- Higher compressive strength: suitable for pressure-loaded parts.
- Low coefficient of friction: smooth motion and reduced counter-surface wear.
- Wide service temperature range: typically from -200°C to +250°C.
- Good chemical resistance: compatible with many industrial fluids and chemicals.
Typical Industrial Applications
- CNC-machined mechanical parts
- Bushings and plain bearings
- Wear plates, guide strips and sliding elements
- Rings and pressure-loaded components
- Seal support parts and back-up rings
- Chemical processing and oil & gas equipment
Technical Overview
| Property | Typical Value |
|---|---|
| Carbon Filler Content | Approx. 5% – 25% (grade dependent) |
| Service Temperature | -200°C to +250°C |
| Wear Resistance | High |
| Dimensional Stability | Improved vs. Virgin PTFE |
| Coefficient of Friction | Low |
| Machinability | Excellent (CNC turning & milling) |
Carbon Filled PTFE vs. Virgin PTFE
Compared to virgin PTFE, carbon filled PTFE sheet offers higher load capacity, superior wear life and reduced creep.
While virgin PTFE is preferred for maximum purity and chemical inertness, carbon filled PTFE is the better choice for
mechanically demanding applications.
FAQ
Is carbon filled PTFE suitable for bearings?
Yes. It is commonly used for bushings and plain bearings where continuous sliding and load are present.
Can carbon filled PTFE be CNC machined?
Yes. The material machines cleanly and is well-suited for precision CNC turning and milling.
Is chemical resistance affected by carbon filler?
Chemical resistance remains very good, though slightly lower than virgin PTFE. Media compatibility should be verified
for aggressive chemicals.
For selecting the correct Carbon Filled PTFE Sheet grade based on load, temperature and wear conditions,
contact our technical team for expert support.