GATE (TF) Textile 2020 Question Paper Solution | GATE/2020/TF/05

Question 05 (Textile Engineering & Fibre Science)
Q.5Viscose rayon is soluble in
(C)Formic acid 85% (v/v)
(D)Sulfuric acid 59% (w/w)
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What is viscose rayon?

Viscose rayon, also known as viscose, is a type of regenerated cellulose fiber that is made from wood pulp or other cellulose sources. It is a popular textile material that is widely used in the production of clothing, home textiles, and other products.

The process of making viscose rayon involves treating the cellulose with chemicals to dissolve it into a viscous liquid, which is then extruded through small holes in a spinneret to form fibers. The fibers are then chemically treated to remove any remaining impurities and to improve their strength and durability. The resulting fibers are soft, breathable, and moisture-absorbent, making them suitable for use in a wide range of applications.

Viscose rayon is often used as a lower-cost alternative to natural fibers such as cotton or silk, and it can also be blended with other fibers to improve its performance characteristics. However, the production of viscose rayon involves the use of several chemicals that can be harmful to the environment if not properly managed, and there are concerns about the sustainability of the wood pulp used as a raw material. Efforts are being made to improve the sustainability of the viscose rayon industry through the use of more sustainable wood sources and more environmentally friendly production processes.

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