The viscose rayon is regenerated cellulose. Cellulose is the major constituent of wood. Cellulose from wood it is purified, treated with caustic soda, which converts it into alkali cellulose, then treated with carbon disulphide which converts it into sodium cellulose xanthate, and then dissolved in a dilute solution of caustic soda. This solution is then ripened, the solution become at first less viscous and then increasing nearly to its original viscosity; it is then spun into an acid coagulating bath, which precipitates the cellulose in the form of viscose filament.
The cellulose which constitutes the final filament differs chemically from the original cellulose of the wood in only one respect- that it suffered some degradation during the manufacturing processes: the very long cellulose molecules have been partly hydrolyzed and have been broken down into shorter one. This fibre is also called as Artificial Silk.
|Viscose Rayon Manufacturing Process (Citation Required )|