Engineered Fibres
Engineered Fibres are a family of fibres that have been developed to meet specific engineering needs. They are made by melting pure oxides in an electric furnace and pouring the molten material into a fiberising chamber. Depending upon the fibre diameter requiredthe molten material is fiberised either by dropping it onto arotating wheelor atomising it with compressed air and drawing the droplets into fibres in an accelerating airstream.
SELECTION OF FIBRE TYPE
This is dependent upon the application since certain applications require fibre without unfiberised particles whereas in other applications unfiberised materials does not cause a problem.
CLASSIFICATION TEMPERATURE
1100°C 1200°C 1260°C 1425°C
Chopped Fibres
Thermal Ceramics has installed special equipment toenable the average fibre length to be tailored to suitindividual customer requirements. Mean length can becontrolled from 150 micron up to 25 mm. For the majorityof applicationsthe standard grades of chopped fibres are
sufficient (length is measured using a settling test calledbeaker value. The higher the number in this testthelonger the fibre). The standard grades are :
20 Coarse
Approx. “Beaker value” 200 ml*
15 Medium
Approx. “Beaker value” 150 ml*
08 Fine
Approx. “Beaker value” 80 ml*
Typical Figures TCL QC test
Excellent Resistance to chemical attack
Unaffected by oilwater or steam
Very low thermal expansion
Excellent shock resistance
Good corrosion resistance
Low moisture absorption
Low electrical conductivity
Good tensile strength
Constant coefficient of friction
TYPICAL APPLICATIONS
Applicationswhere the fibres are used to modify specific
properties of a material : such as wearstrength or fatigue
are as follows :
Friction Materials
Mastics
Paints
Cements
Plastics
Metals
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