Bronze-filled PTFE sheet is a reinforced PTFE grade engineered for higher load capacity, improved wear resistance, better thermal conductivity, and superior dimensional stability compared to virgin PTFE. It is widely used for CNC-machined bearing pads, bushings, wear strips, and mechanical sealing components in oil & gas, chemical processing, and heavy-duty industrial equipment.
What is Bronze-Filled PTFE Sheet?
Bronze-Filled PTFE Sheet is a filled PTFE grade formulated by blending PTFE with bronze filler to improve
compressive strength, wear performance, thermal conductivity, and dimensional stability.
Compared to virgin PTFE, it is better suited for applications involving higher loads, sliding contact, and demanding duty cycles,
where creep reduction and long-term stability are critical.
Key Engineering Advantages
- Higher load capacity: improved compressive strength helps reduce deformation under sustained pressure.
- Enhanced wear resistance: longer service life in sliding and bearing applications.
- Better dimensional stability: reduced creep compared to unfilled PTFE in many mechanical designs.
- Improved thermal conductivity: supports heat dissipation in frictional interfaces.
- Low friction surface: PTFE base maintains low friction characteristics in many assemblies.
Typical Applications
- CNC-machined wear parts: wear strips, guide rails, sliding pads
- Bearings & bushings: under load where improved wear is required
- Seal and support components: mechanical interfaces exposed to friction and temperature variation
- Process and rotating equipment: oil & gas, petrochemical, chemical processing machinery
Typical Technical Data (Guide Values)
| Property | Typical Range |
|---|---|
| Bronze content | 15% to 40% (grade-dependent) |
| Service temperature | -200°C to +250°C (application-dependent) |
| Hardness (Shore D) | 60 to 75 |
| Wear resistance | High (vs. virgin PTFE) |
| Thermal conductivity | Higher than virgin PTFE |
| Coefficient of friction | Typically 0.08 to 0.15 |
Selection Notes (When to Choose Bronze-Filled PTFE)
- Choose this grade when wear + load are more critical than maximum chemical inertness.
- For highly aggressive chemicals where filler compatibility is a concern, consider virgin PTFE or an alternative filled grade.
- Provide your load, speed, temperature, and media to select the best filler percentage and thickness.
FAQ
1) How does bronze-filled PTFE differ from virgin PTFE?
Bronze-filled PTFE generally offers higher load capacity, improved wear resistance, and better dimensional stability than virgin PTFE.
2) Is bronze-filled PTFE suitable for CNC machining?
Yes. It is commonly selected for CNC-machined wear components such as bushings, bearing pads, and guide elements.
3) Is bronze-filled PTFE used for bearings and bushings?
Yes. It is widely used where sliding wear and load are present and long service life is required.
Need help selecting the right bronze-filled PTFE sheet grade and dimensions for your application?
Contact Tose’e Teflon technical team for a specification-based recommendation.