What calcium carbonate does in seven industries, and the Khattco grades that suit each one.
01
Calcium carbonate is the most widely used mineral filler in PVC and other plastics. It replaces part of the more costly polymer, adds stiffness and improves the surface finish. Coated grades disperse more evenly in the polymer than uncoated powder, and the finer coated grades suit thin sections such as film.
02
Filler masterbatch carries a high loading of calcium carbonate in a polymer carrier. It is then blended into film, mouldings and other plastics to reduce the amount of resin needed. Coated powder is preferred because it mixes into the polymer and resists moisture.
03
In paint, calcium carbonate is an extender pigment. It adds bulk and brightness and lowers the cost of the formulation. Finer grades have fewer coarse particles and give a smoother film.
04
Calcium carbonate is used as a filler in the paper sheet and as a pigment in paper coatings. It raises brightness and opacity and reduces the amount of costly fibre required. The finer the grade, the smoother the sheet surface.
05
Calcium carbonate is a non black filler for rubber compounds. It adds bulk, lowers compound cost and keeps the colour light where carbon black is not wanted. It does not reinforce rubber the way carbon black does. Coated grades mix more easily into the rubber.
06
In adhesives and sealants, calcium carbonate is a filler that adds body, helps control viscosity and flow, and lowers cost. Fine grades give a smooth finish, and coated grades mix well into polymer based sealants.
07
In wall putty, tile adhesive and similar construction chemicals, fine calcium carbonate acts as a filler. It gives a smooth, white finish and good workability, and it lowers the cost of the mix.
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