PTFE Carbon Filled has good chemical resistance to corrosive environments, has better creep and wear resistance compared to standard PTFE materials. These properties are improved with the addition of a carbon filler. This filler improves dimensional stability, raises the heat deflection temperature, improves creep resistance and the dynamic bearing performance. PTFE Carbon-Filled exhibits good initial wear and rubbing/sliding contact characteristics in both dry and wet/water applications. It is frequently used in piston rings to reduce cylinder wall wear by entrapping abrasive foreign particles in their relatively soft surfaces.
Carbon Filled PTFE was developed to provide a PTFE based material with improved mechanical strength.
PTFE on its own has excellent frictional properties, elasticity and wear resistance but relatively poor mechanical strength and tends to fail in high PV applications.
Carbon in itself is a brittle material with poor wear properties and mechanical strength. However with the two combined in Carbon Filled PTFE formulations, the resultant material has excellent mechanical and wear properties, retains the excellent frictional properties and is an excellent choice for seals and rings in dynamic and high pressure applications.
Carbon filled PTFE also provides good thermal conductivity, low permeability and is also electrically conductive making it a good choice for anti-static applications.
The most common carbon filled PTFE composition is 75% Virgin PTFE with 25% Carbon powder by weight.
When a filler ratio or type is unspecified, it is fair to assume this is the material. However it doesn’t tell the whole story. The type and percentage of carbon added to PTFE is a variable and is critical to material performance.
It can be as little as 0.2% and as much as 40%. Different percentages of carbon will
APPLICATIONS : Piston rings;Pump housings;Valve seats;Gaskets;Roller coverings;Shaft bearings;Filter housings;Etching plates;Shaft seals;Slide runners;Chemical engineering;Conveyor technology;Pump and instrument construction;Electrical industry;Electronics;Laser technology;Fume purification;Pure water production;Cryogenics;Filter technology;Food & beverage;Medical technology.
Post time: Sep-04-2019