Cotton consists typically of between 88 to 96% cellulose with the rest being protein, pectic substances (congealed gum-like carbohydrates), ash and wax. After scouring and bleaching, cotton is then about 99% cellulose. The fibres are weakened and destroyed by acids but are resistant to alkalis.
The fibre length varies with the type and quality, within the range 10 to 65mm; the fibre diameter ranges from 11 to 22 ¼m. Cotton is a relatively strong fibre with a strength of 25 to 35 cN/tex and a breaking elongation of 7 to 9%.
It is stronger when wet. Cotton also absorbs moisture readily, which makes cotton clothes comfortable to wear in warm weather (water retention of 50%, moisture regain of 7%).
It is used in both 100% form and in blends with other fibres for household textiles and apparel. Synthetic fibres have largely replaced its use in industrial textiles.
Thursday, April 24, 2008
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment