What is Kaolin?
Kaolin, a mineral additive, AKA China clay, is nearly white in color and is considered as one of the most used mineral additive or filler or pigment depending upon the usage.
Its fine particle size and pure coloring distinguish it from other industrial clays.
Its ability to disperse in water makes it an ideal pigment and a recommended mineral additive.
The primary constituent in kaolin is the mineral kaolinite, a hydrous aluminum silicate formed by the decomposition of minerals such as feldspar.
Kaolinite has a low shrink-swell capacity and a low cation-exchange capacity (1–15 meq/100 g) and its chemical name is: Al2Si2O5(OH)4
Excellent Properties of our Kaolin Series:
- Enamel Holding
- Good Suspension
- Viscosity Enhancing
- Excellent Opacity, Lustre, Gloss
- Excellent Hiding Power
- Anti-Caking Agent
- High Mechanical Strength
- Dimensionally Stable
- High Extrusion Properties
- Better Production Flow
- Better Tensile strength
- Low Shrink swell capacity
- Low Cation Exchange Capacity
Facts and Benefits of our Kaolin Series in Varied Industries:
Two types of kaolin clays are being used in the rubber industries depending upon the end usage of the clay, namely:
- Hard Clay
- Soft Clay
Application area includes:
- Hoses (Hydraulic, LPG, etc.)
- Eva Sheets
- Rubber Profiles
Benefits and Facts:
- The combination of Carbon Black with hard clays increases mechanical properties like modulus and tensile strength while reducing compression and maintaining lower compound cost.
- The cure rate can be reduced
- Since kaolin is inert, it is naturally nonabrasive
- The specific gravity of a filler affects the molded products’ final weight
- The reinforcement of rubber depends on the particle size of the filler.
- Better Production flow
Kaolin is used in this particular industry because of its:
- Earthy nature
- Easy dispersibility in water
- Coverage Area
Two types of clays are used in paints and inks industries:
- Hydrous Kaolin:
- Water and solvent-based paints in distempers.
- Interior and exterior paints.
- Primers and undercoat
2. Calcined Kaolin:
- Satin and matt paints where they deliver increased opacity, whiteness, and scrub resistance.
Kaolin is considered as an essential constituent in ceramics and is used by almost every manufacturer worldwide in:
- Electrical Porcelain
- Fine China and Dinnerware
- Floor and Wall Tile
- Roof Tile
- Sanitary ware
- Other Engineering Products
Important properties of kaolin in Ceramics:
- Plastic properties
- Drying properties
- Firing properties
- Firing color
- Electrical properties such as conductivity, dielectric content, etc.
Benefits in Ceramics:
- Easy deformation under stress.
- Due to Low plasticity, does not require intense forming pressure to withstand handling/drying.
- Better Green Strength
- Excellent firing properties in order to produce a super white finish
- GRIT free material
- Low and even particle size to keep drying shrinkage in desired parameters.
- Most porous
- Very fine and smooth Platelets.
- Good Vitrification.
- Pesticides and a lot more
For more details, queries, quotations, reach out today.
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