China Clay

China Clay, which falls under the Kaolinite group of clays is formed by weathering or hydrothermal alteration of felspathic rocks. It has the general formula A12, (Si205) (OH)4. It is a hydrated alumino-silicate having sheet structure. Free Silica (grit) is the most undesirable impurity and is removed during processing by levigation, sedimentation or air-separation.:

High grade china clay deposits are present in West Bengal, Orissa, Rajasthan, M.P. & gujarat. First we collect the samples from various mines which is analysed for composition and physical and chemical properties and its suitability for various application is then studied. Moreover, sustained availability of the material with no variation from mines is given utmost importance to ensure consistency in final product.

PROCESSING

The raw China Clay is subject to a refining process including spiral classification, hydrocycloning, deflocculation, bleaching, drying, micronizing, air-classification and surface treatment. Our processing ensures consistent composition, control of top-cut and average particle size and freedom from free ilica.

PRODUCTS

MINING manual sorting to recover white lumps. On site chemical analysis before despatch to our factories. MICRONIZING Test for physical properties like bulk density, oil absorption, Whiteness etc. SURFACE TREATMENT Testing of hydrophobicity, oil absorption and uniformity of coating. QUALITY TEST CERTIFICATION Quality Test Certificate is provided to customers, certifying values within specification.

THE MAIN FEATURES ARE

  1. High degree of brightness.
  2. Free from siliceous matters and metallic impurities.
  3. Ultrafine particle size distribution.
  4. Improves mechanical & electrical properties of the composite.
  5. Very low moisture content.
  6. Low bulk density.

APPLICATION

  1. As an extender in mfg. of Semigloss, Full Gloss Oil based Paints where dispersion properties are of more importance.
  2. As a filler in general-purpose PVC & Other Thermoplastics.
  3. As an economical grade of Aluminium Silicate in Rubber Footwear's'.
  4. As a filler in Toilet soap.
  5. As a filler in Foam industry.
  6. As a filler in surgical / pharmaceutical products.
  7. As a filler in Oil Bond & Enamel Paint.
  8. As a body filler & for Coating in Paper Industry.
  9. As a filler in Hawai Chappal Industry.


GRADES
Sdf
055-5*
044-5*
036-4*
3*
Whiteness ds 91-94 90-91 88-90 86-88
Silca % (Sio2) 50-55 54-57 57-58 57-58
Alumina % (AL203) 30-33 30-33 28-30 28-30
Loss of ignition % Max. 6.5 6.5 6.5 6.5
Ferric Oxide % (FE203) 0.05 0.1 0.1 0.1
TiO2 % ds Traces Traces Traces Traces
Mixed Oxides % ds 2.5 2.8 2.8 2.8
Moisture % Max. below 1 1 1.5 1.5
Bulk Density (gm/ml) 0.38-0.42 0.45-0.50 0.50-0.55 0.55-0.58
Specific Gravity ds 2.5 2.6 2.8 2.8
P.H. Value ds 7-7.5 7-7.5 7-7.5 7-7.5
Water Absorption % (ml/100gm) 42-48 36-40 36-38 32-36
Mesh ds 750 500 500 400
Residue below 1.0 1.0 2.0 2.0
Packing ds 25 kg 25 kg 25 kg 25 kg
ds ds ds ds ds ds

** At the time of packing

The above mentioned data are typical & every effect in processing is made to ensure the published date. However, products being based on natural occurring raw materials, the company reserves the right to change these data's should it become necessary?

** NOTE