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Friday, August 6, 2010

Viscose fiber

Viscose is a viscous organic liquid used to make rayon and cellophane. Viscose is becoming synonymous with rayon, a soft material commonly used in shirts, shorts, coats, jackets, and other outer wear.
At first wood pulp is dissolved in caustic soda (lye) and after steeping is shredded and allowed to age. Ageing contributes to viscosity and longer aging leads to greater viscosity. The aged pulp is then treated with carbon disulphide to form a yellow-colored cellulose xanthate, which is dissolved in caustic soda again, but of a lower concentration


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