To improve individual, especially mechanical properties, fillers (compounds) are added to pure PTFE. Individual components have a specific effect on particular quality characteristics, which depends on the quantity (per cent) of the additional filler. The added filler improves or changes the characteristics of the material according to the properties and the quantity of the filler:
Most commonly used fillers: glass fibre, carbon, bronze or powdered graphite, strengthened mixed with PTFE; other fillers are: molybdenum disulphide, metal powder, ceramic, PEEK, metal oxides and a mixture of two or several additives.
Properties of PTFE with fillers
TEFLON + 15% GRAPHITE
Very good resistance against abrasion and thermal conductivity with satisfactory elasticity.
It is used for the bearings and gaskets of rotating axles – oil sealing rings.
Volume mass: 2.16 +/– 0.04g/cm3
TEFLON + 15% GLASS FIBRE
Due to the improved mechanical properties, it is used mostly for parts with high tensile stress. Most often, these are flat gaskets, piston rings, bearings, chemically resistant valve seats, O-rings, cuff seals etc.
Volume mass: 2.21 +/-0.04g/cm3
TEFLON + 25% CARBON
For areas with larger mechanical stress, increased wear, chemical influence and thermal stress. They are most often used for piston rings, guide rings, bearings, cuff seals, valve seats etc.
Volume mass: 2.09 +/-0.04g/cm3
TEFLON + 60% BRONZE
Material with high tensile strength and resistance against wear. Products are usually in the form of bearings, piston rings, machine guide bushes, hydraulic cylinders etc.
Volume mass: 3.85 +/-0.15g/cm3
TEFLON® is a protected registered brand of DU-PONT.
DASTAFLON® is a protected registered brand of our PTFE products.
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