Kaolin Powder, Packaging Size: 50 kg

Product Details

Kaolinite is a clay mineral, with the chemical composition Al2Si2O5(OH)4. It is an important industrial mineral. It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO4) linked through oxygen atoms to one octahedral sheet of alumina (AlO6) octahedral. Rocks that are rich in kaolinite are known as kaolin or china clay. Kaolinite has a low shrink–swell capacity and a low cation-exchange capacity (1–15 meq/100 g). It is a soft, earthy, usually white, mineral (dioctahedral phyllosilicate clay), produced by the chemical weathering of aluminium silicate minerals like feldspar. In many parts of the world it is colored pink-orange-red by iron oxide, giving it a distinct rust hue. Lighter concentrations yield white, yellow, or light orange colors. Alternating layers are sometimes found, as at Providence Canyon State Park in Georgia, United States. Commercial grades of kaolin are supplied and transported as dry powder, semi-dry noodle, or liquid slurry. APPLICATION ·: DRUG AND PHARMA INDUSTRIES: Kaolin is used for the manufacturing of cosmetics and pharmaceutical products like face powder, talcum powder, toothpaste, tooth powder, adhesives, surgical plaster, lotion and ointment for external use and porcelain in the dental preparation. ·: PAINT INDUSTRIES: Kaolin is used in white paint. It is also used in oil paint owing to its high oil absorption. Kaolin is used as an extender or a suspending agent in oil paints and as pigments in water paints or distempers. Kaolin has properties such as white color, easy dispersion, anti-settling and chemical inertness, which are the main criteria for its use in paint industries. ·: CERAMIC INDUSTRIES: The word ceramic derived from Greek word "Keramos" originally meant fired and fused common clays. The manufacturing consists of mixing China clay, quartz or silica and other types of clay, feldspar and some flux with water. This mixture is well ground, thoroughly stirred up, filtered, pressed and molded into the required shape. It is then dried and fired at a temperature raging from 1200⁰ to 1500⁰ Celsius. ·: RUBBER INDUSTRIES: Considerable quantity of kaolin is used for filling rubbers to improve its mechanical strength and resistance to abrasion. For this purpose, the clay used must be extremely pure kaolinite and exceedingly fine grained. ·: PLASTIC INDUSTRIES: In the plastic industry, KAOLIN is used as a functional extender for adding strength, electrical resistance (important in PVC cable covers) and gloss. China Clay has Low specific gravity, fine particle size, high dispersion, poor electrical conductivity, high reflectivity, low water absorption (i.e. low shrinkage on drying) and inertness which are the important criteria for this application. In polythene film, Kaolin can enhance the absorption characteristics. During the curing process of polyester resin the intensity of the exothermic reaction is to some extent contained by china clay by virtue of its water content. ·: