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.

 

Possible Variations

Bronze Filled PTFE is reinforced with bronze powder with the percentage varying between 40% and 60% depending on the needs of the application.

STRENGTHS

  • Extremely hard wearing material
  • Very heavy – high specific gravity
  • Electrically conductive
  • Low wear on dynamic counter surfaces
  • Can have additional additives such as MOS2 to increase lubricity
  • The best wear properties of any filled PTFE
  • Great deformation strengths
  • Good thermal conductivity
  • Good creep resistance

WEAKNESSES

  • Not suitable for electrical applications
  • Poor chemical resistance

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

Typical Values  

     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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