The addition of Bronze to PTFE gives better dimensional stability and lowers creep, cold flow and wear. It increases hardness and compressive strength whilst also increasing thermal and electrical conductivity.
Bronze Filled PTFE Properties
Bronze Filled PTFE is reinforced with bronze powder with the percentage varying between 40% and 60%, resulting in a very hard wearing material. It has weaker chemical resistance than other grades of PTFE and isn't suitable for electrical applications.
STRENGTHS
WEAKNESSES
- Can also have additional additives such as MOS2 to increase lubricity
Possible Applications
Bronze filled PTFE is used extensively in the compressor industry. Wear rings, piston rings and bearing rings. High performance seals and wipers. It is an extremely versatile material.
| Property | Test Method | 40% Bronze Filled | 60% Bronze Filled |
|---|---|---|---|
| Specific Gravity | BS EN ISO 13000-2 | 3.0 – 3.12 g/cm3 | 3.8 – 3.95 g/cm3 |
| Tensile Strength | BS EN ISO 13000-2 | 22 - 27 Mpa | 10 -18 Mpa |
| Elongation | BS EN ISO 13000-2 | 230 – 270% | 100 - 200% |
| Shore D Hardness | BS EN ISO 13000-2 | 65 - 68 | 65 - 75 |
The addition of Bronze to PTFE gives better dimensional stability and lowers creep, cold flow and wear. It increases hardness and compressive strength whilst also increasing thermal and electrical conductivity.
