Both ground calcium carbonate (GCC) and precipitated calcium carbonate (PCC) are used in an increasingly wide range of applications. Commercial grades of calcium carbonate have been developed to meet the technical demands of a different requirements by optimising properties such as fineness, particle size distribution and colour.
Adhesives & Sealants
GCC is often the main ingredient of sealants, fillers and ceramic tile adhesives (CTA’s), sometimes up to 80% of the formulation.
Animal & Pet Feeds
GCC is incorporated into animal feedstuffs as a dietary supplement and antacid
GCC has long been used as a filler in materials like asphalt, roofing felt and plasters. Increasingly other applications are emerging in the new areas of specialist concretes & grouts. Consistent particle size and handling characteristics are very important
GCC is a wholly naturally occurring source of alkalinity used for flue gas desuphurisation in power stations, de-acidification of forests and rivers, and drinking water treatment. It can also be used as passive fire protection in hazardous environments, for example coal mines
Calcium Carbonate has long been recognised as a useful addition to soil for agriculture, stabilising the acidity of soil and providing essential calcium for support of crops.
Food & Household :
GCC is used as an inexpensive dietary calcium supplement and antacid, or as a chemical binder. It can be used in less obvious ways, for example in polishing and cleaning rice, or a cleaning component in shoe polish.
Glass & Ceramics :
GCC is a an essential calcium component in the manufacture of container and flat glass. High purity, consistent colour and low levels of impurities are essential. It is a common ingredient in pottery glazes.
Paints & Surface Coatings :
GCC is used to bulk out or extend the resins & polymers in paints. Colour is obviously important and GCC is used as an aid to pigmentation, and also to help control the finish (matt or gloss).
Fine grades of GCC are used extensively in paper manufacturing. Consistent particle sizing and colour are essential. As an alkali material it reduces acidity of paper, improving the durability of printed material
GCC is widely used as a filler in plastic products, comprising up to 25% of the volume, adding density, improving rheology and reducing cost. GCC is often blended or “coated” with additives such as stearates to aid bonding within the plastic.
Rubber & Elastomers :
GCC is useful as an extender and in controlling the flow properties of products which are to be moulded or extruded. A widespread application is in latex carpet backing materials.
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