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  • Name: Kaolin Clay in Paper Industry
  • No.: JH-603-3A
  • Time: 2017-04-29
  • Views : 40

Kaolin Clay in Paper Industry

 

Kaolin, or China clay, is nearly white in color.  It is distinguished from other industrial clays based on its fine particle size and pure coloring.  Its ability to disperse in water make it an ideal pigment.
 
The primary constituent in kaolin is the mineral kaolinite, a hydrous aluminum silicate formed by the decomposition of minerals such as feldspar. 
 
The name kaolin derives from the Chinese and means high ridge.  High ridge is a reference to the hill in south-eastern China where the clay was originally discovered and used.  In the 7th and 8th centuries, the Chinese were the first to use kaolin to make porcelain.  It was not until centuries later that other areas of the world could duplicate the process.
 
The white color of the mineral can either be naturally occurring, or can result after processing which removes minerals and other color-bearing compounds.  The small particle size of the mineral contributes to its white color by scattering light.
 
Although kaolin is found throughout the world, deposits with suitable whiteness, viscosity and other favorable characteristics are rare.  Ironically, the best deposits are not located in China.  The Unites States has high-quality deposits in the Southeast.  The mineral has been mined since colonial times in Georgia and South Carolina.  Other valuable deposits are located in Brazil and the United Kingdom.
 
Paper Industry: The primary use of kaolin is in the paper industry.  It serves as a paper coating which improves appearance by contributing to brightness, smoothness and gloss.  It also improves printability.  Additionally, it is used by the paper industry as a filler reducing cost and the use of tree-based resources.
 
China, Porcelain and Tableware: Many people are under the mistaken impression that the only use for kaolin is in the manufacture of china.  This is not true, and its use by the paper industry far exceeds its other uses.  However, kaolin still serves as a valuable component in china and other tablewares.  Its color, gloss and hardness are ideal characteristics for such products.
 
Other Uses: Kaolin has a variety of other uses in products including paint, rubber, cable insulation, specialty films and fertilizers.  New uses are being discovered frequently, and ensure that the mineral will remain in demand for a long time.
 

Adhesive, Caulk & Sealant

Jiahe Kaolin offers tailor-made solutions based on an in-depth understanding of the manufacturing process, production and business constraints of the Adhesives, Caulks and Sealants Industry.

Jiahe Kaolin product portfolio encompasses a full range from economical extenders to highly functional surface treated additives. Strong technical understanding of our products and their applications complements the natural value of the minerals we supply.

Jiahe Kaolins' are used in Adhesive, Caulk and Sealant systems to control structure, consistency and body. Kaolin is a hydrated aluminum silicate crystalline mineral characterized by its fine particle shape and chemical inertness. The play shape can give good barrier properties in sealants by creating a tortuous path to protect the material that has been sealed.

Calcined Kaolin's are processed by heating the kaolin to high temperatures. This calcination process increases whiteness and hardness and modifies the particle shape. This particle shape offers a random agglomerate of controlled particle size, making it effective as a structure building component. Calcined kaolin has a neutral pH, which allows it to be used in both acid and alkali formulations.

Benefits

Low Moisture content

Controlled particle size effective as a structure building component

Natural pH

High Whiteness

Cost savings in end product formulations

Building & Construction

Jiahe Kaolin is a supplier of high quality Kaolin's to the building and construction industry throughout the world.

Jiahe Koalin is manufactured by the calcination of kaolin to form an amorphous pozzolanic white mineral additive for use in cement based products.

The pozzolanic reactivity of Metakaolin is its ability to react with calcium hydroxide in cement based products.

Metakaolin in Concrete

Metakaolin reduces the porosity of concrete, a feature that can allow a reduction in the “cover” of concrete needed to protect reinforcing bars from corrosion. Road and marine structures exposed to corrosive salts are good examples where Jiahe Metakaolin can be used to advantage

Where high strength concrete is required, Jiahe Metakaolins increase cured compressive strength of concrete and also speed up curing and early strength development. This makes Jiahe Metakaolins suitable for use in applications where high strength is required quickly, such as airport aprons.

Efflorescence is a common problem affecting concrete, caused by lime salts forming calcium carbonate on the surface of the concrete. Jiahe Metakaolins can reduce efflorescence by reducing the porosity of the concrete and reacting with the lime salts before they reach the concrete surface.

Metakaolin can also be used to modify the handling properties of wet concrete, particularly benefiting the viscosity profile and reducing the tendency to bleed, making leveling and achieving a good surface finish easier.

 

Metakaolin for Concrete Applications

Metakaolin is a premium pozzolanic metakaolin produced by very carefully controlled calcination. When used in Portland cement-based concrete, plaster, and mortar,Metakaolin can provide improved strength, durability, workability and plaster finish.

Metakaolin

 is a metakaolin pozzolanic additive that:

Improves strength, durability, and workability of Portland cement concrete

Makes Portland cement easier to apply

Provides smoother finish

Has bright white color for white and color plasters

Reduces permeability, efflorescence and cracking

Reduces the porosity of hardened concrete

Contains no undesirable impurities, such as carbon or sulphur, which could affect the curing rate or strength of the final PC product

Readily disperses in cement-based systems

Is safe and easy to handle

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