Man Made Fibres

Question 1

Question: Describe the production process of viscose rayon.

Answer 1

Answer: The production of viscose rayon begins with the extraction of cellulose from trees. The trees are cut into logs, which are then shredded into wood chips. These wood chips are cooked with a caustic soda solution to form sheets of cellulose. The cellulose sheets are shredded and mixed, then immersed in a caustic soda bath to create a viscous solution. This solution undergoes wet extrusion, where it is forced through spinnerets to form fibers. These fibers are subsequently solidified in an acid bath, resulting in viscose rayon.

Question 2

Question: Describe the production process of regenerated cellulose acetate.

Answer 2

Answer: The production of regenerated cellulose acetate starts with the extraction of cellulose from wood pulp, which is then physically and chemically transformed into cellulose acetate. The cellulose acetate is dry spun to produce fibers. These fibers solidify as the solvent, acetone, evaporates. Cellulose acetate fiber fabrics have the ability to dissolve in acetone and exhibit thermoplastic properties similar to synthetic fibers. Additionally, acetate fibers can be heat set, enhancing their stability and durability.