Rayon Manufacture
Rayon is a manufactured regenerated cellulose fiber. Because it is produced from naturally occurring polymers, it is neither a truly synthetic fiber nor a natural fiber; it is a semi-synthetic[1] fiber.
Rayon Fiber Characteristics o Highly absorbent o Soft and comfortable o Easy to dye o Drapes well
Some Major Rayon Fiber Uses • Apparel: Accessories, blouses, dresses, jackets, lingerie, linings, millinery, slacks, sportshirts, sportswear, suits, ties, work clothes • Home Furnishings: Bedspreads, blankets, curtains, draperies, sheets, slipcovers, tablecloths, upholstery • Industrial Uses: Industrial products, medical surgical products, nonwoven products, tire cord • Other Uses: Feminine hygiene products
Cellulose is treated with alkali and carbon disulfide to yield viscose.
Manufacturing Process of Viscose Rayon
Viscose Rayon
It is a regenerated cellulosic fibre and cellulose is the raw material for producing this man made fibre.
The raw material is obtained from a special variety of wood called spruce.
Manufacturing Process
[pic]
a. Purification of Cellulose: The manufacture of viscose rayon starts with the purification of cellulose. Spruce trees are cut into timber. Their barks are removed and cut into pieces. These pieces are treated with a solution of calcium bisulphate (Ca(HSO3)2) and cooked with steam under pressure for about 14 hours.
The cellulosic component of the wood is unaffected by this treatment, but the cementing material called lignin, which is present in the wood, is converted into its sulphonated compound which is soluble in water. This can be washed off, thereby purifying the remaining cellulose. This cellulose is treated with excess of water. After this it is treated with a bleaching agent sod hypochlorite (NaClO) and finally converted into paper boards or sheets. This is called wood pulp, which is normally
Rayon Fiber Characteristics o Highly absorbent o Soft and comfortable o Easy to dye o Drapes well
Some Major Rayon Fiber Uses • Apparel: Accessories, blouses, dresses, jackets, lingerie, linings, millinery, slacks, sportshirts, sportswear, suits, ties, work clothes • Home Furnishings: Bedspreads, blankets, curtains, draperies, sheets, slipcovers, tablecloths, upholstery • Industrial Uses: Industrial products, medical surgical products, nonwoven products, tire cord • Other Uses: Feminine hygiene products
Cellulose is treated with alkali and carbon disulfide to yield viscose.
Manufacturing Process of Viscose Rayon
Viscose Rayon
It is a regenerated cellulosic fibre and cellulose is the raw material for producing this man made fibre.
The raw material is obtained from a special variety of wood called spruce.
Manufacturing Process
[pic]
a. Purification of Cellulose: The manufacture of viscose rayon starts with the purification of cellulose. Spruce trees are cut into timber. Their barks are removed and cut into pieces. These pieces are treated with a solution of calcium bisulphate (Ca(HSO3)2) and cooked with steam under pressure for about 14 hours.
The cellulosic component of the wood is unaffected by this treatment, but the cementing material called lignin, which is present in the wood, is converted into its sulphonated compound which is soluble in water. This can be washed off, thereby purifying the remaining cellulose. This cellulose is treated with excess of water. After this it is treated with a bleaching agent sod hypochlorite (NaClO) and finally converted into paper boards or sheets. This is called wood pulp, which is normally