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Starch (China Origin)

Starch (China Origin)
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Country Origin : China Appearence : White Powder
CAS No. : 9005-25-8 H.S. Code :
Formula : (C12H22O11)n Common Names : Corn Starch
IUPAC Name : Starch
Packaging : 720 @ 25 kg Paper Bags/ Plastic Woven Bags, 18 MT / 20'FCL
  • Description
  • Application
Brief Overview


Starch is a carbohydrate consisting of a large number of glass units joined by glycosidic bonds. It is a polysaccharide and is produced in both plants and humans. It exists as a white crystalline powder and has a formula made up of linear and helical amylase and branched amylopectin. In plants, starch is their energy storage and is approximately 20 – 25 % amylose with the rest as amylopectin. In animals, the energy storage is glycogen and not starch.

Starch is hydrolysis by enzyme called amylase. Starch is insoluble in cold water and alcohol, but it is soluble in hot water. When starch dissolves in hot water, wheat paste is obtained and is used as a thickening, stiffening or gluing agent. This is in turn used in the papermaking process as an adhesive and textile processing to stiffening the garment. On the other hand, glucose is soluble in water. It is hydrophilic and osmotically active.


Manufacturing Process

Extracted from Plants

Starch serves as the starting material for manufacturing of starch derivatives and starch are often obtained from maize. Other sources of starch include potatoes, wheat, tapioca and rice. Using potatoes as starch raw material, it goes through a series of processes before the starch is obtained:

• Potatoes are delivered and unloaded

• Potatoes are cleaned during the transport to the scrubber by channel

• Potato tubers are rasped and this is carried out with a rotary with a rotary grater

• Starch extraction after separation of cellular juice

• Starch raffination, where the crude starch is purified in the refining process

• Starch is de-watered and dried



Textile Industry

Starch is great and widely used in the textile industries. It is being used in textile processing, printing and finishing. During textile processing, starch and starch derivatives are added and applied to the fabrics to improve the properties of the fabrics. During textile printing, starch serves as a thickening agent for textile prints and helps in sizing mixed-synthetic and natural thread. In the finishing of textile, starch is used and it helps in adhering fabrics onto printers screen.

 

Food Industry

As an additive for food processing, food starches are typically used as thickeners and stabilizers in foods such as puddings, custards, soups, sauces, gravies, pie fillings, and salad dressings, and to make noodles and pastas.

 

Other Applications

Starch is used as an adhesive on corrugated board due to high bonding strength and stable viscosity upon heating. Both chemically modified and unmodified starches are used in papermaking. In the wet part of the papermaking process, generally called the "wet-end", the starches used are cationic and have a positive charge bound to the starch polymer. Starch is also used in paper coatings as one of the binders for the coating formulations which include a mixture of pigments, binders and thickeners. Coated paper has improved smoothness, hardness, whiteness and gloss and thus improves printing characteristics.