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

Extremely hard wearing material
Very heavy – high specific gravity
Electrically conductive
The best wear properties of any filled PTFE
Great deformation strengths
Good thermal conductivity

WEAKNESSES

Not suitable for electrical applications
Poor chemical resistance
  • 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.

 

TYPICAL PHYSICAL PROPERTIES OF BRONZE FILLED PTFE VARIATIONS
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
Datasheet: Bronze Filled PTFE
AF402 40% Bronze Filled PTFE 188kb

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.

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