Glass,Carbon,Bronze,Graphite……
Glass Filled PTFE
PTFE is reinforced with glass fibres, the percentage varying between 5 and 40%. The added glass fibre improves the wear properties and, to a minor degree, also the deformation strength under load while leaving substantially unchanged the electrical and chemical characteristics. Glass itself, has a rather poor resistance against alkalis and is easily attacked by hydrofluoric acid. The coefficient of friction is slightly increased and for this reason, graphite is sometimes added to compensate this side effect. Buy Glass Filled PTFE online
Carbon Filled PTFE
Carbon is added to the PTFE in a percentage by weight between 10 and 35%, along with small percentage of graphite. Also, the carbon tends to improve to a considerable degree, wear and deformation strength, while leaving practically unchanged the chemical resistance, but substantially modifying the electrical properties. Buy Carbon Filled PTFE online
Bronze Filled PTFE
Bronze, when used as filler, is added in percentages of weight between 40 and 60%. Bronze filled PTFE has the best wear properties, remarkable deformation strengths and good thermal conductivity, but poor electrical characteristics and chemical resistance.
Graphite Filled PTFE
The percentages used vary between 5 and 15%. Graphite lowers the coefficient of friction and is, therefore, often added to other types of filled PTFE for improving this property. It improves the deformation under load, strength and, to a minor degree, the wear properties.
Other Available Fillers
Molybdenum sulphide, though decreasing the coefficient of friction, is sometimes preferred to graphite. Some metal powders (stainless steel, nickel, titanium), in consideration of their particular resistance to chemical agents, are sometimes used as fillers for PTFE, even though their wear resistance, with respect to bronze, are inferior. The metal oxides, added to other fillers, give better wear properties.
Post time: Feb-01-2018