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Wollastonite (calcium silicate, chemical formula CaSiO3) exists in an acicular and non-acicular form.
Wollastonite can be characterised by:
- Shape (non-acicular/ acicular)
- Medium Mohs hardness of 5
- Alkaline nature.
|Property||Casiflux F/ FG||Casiflux G||Unit|
|Moisture||< 0.2||< 0.2||[%]|
Casiflux is the product name for Sibelco’s wollastonite products.
- Acicular grades are named Casiflux F or Casiflux FG
- Granular grades are named Casiflux G
[g/ 100 g]
Reinforcement due to acicular shape e.g. improving impact resistance and Flex Strength of PP-resins.
Abrasion resistance: due to its hardness of 5 on Mohs scale, wollastonite will increase wear resistance.
Rheology control in e.g. sealants and adhesives: due to its acicular shape, wollastonite has an impact on the rheology profile. When applying shear, the acicular particles will align and provide a low viscosity. When shear is removed, the acicular particles lose their orientation and cause the viscosity to increase above the level expected when the particles had a non-acicular shape.