Cotton FIBER MATURITY can be used AS a comprehensive index to evaluate the intrinsic quality of cotton fiber, which directly affects the color, strength, fineness, natural bending, elasticity, moisture absorption, dyeing and other properties of cotton fiber. Therefore, other physical properties of cotton fiber can be estimated or measured according to the maturity of cotton fiber. The mature cotton fiber has many natural twists, good elasticity, good color and lustre. It is not suitable to form cotton knots and wires in the spinning process. The fiber has good adhesion and spinnability, uniform yarn drying, few defects, and high yarn strength. When the fiber maturity is too poor, the fiber strength is low, the fineness is fine, the elasticity and toughness are poor, and the kink is easy to form in the spinning process, so that the fiber appearance is defective and the cotton knot impurities are also added. However, the over-mature cotton fiber is thicker, and the number of fiber roots in the yarn forming section is relatively reduced, which also affects the yarn forming strength.
Maturity of cotton fiber The maturity of cotton fiber refers to the degree of cell wall thickness in cotton fiber, that is, the degree of growth and maturity of cotton fiber. Many properties OF COTTON fiber are related to structure, which is restricted BY maturity TO a large extent, SO COTTON fiber maturity has a significant effect on many properties. The maturity of cotton fiber is often expressed by the maturity coefficient. The greater the maturity coefficient, the more mature the cotton fiber is. The maturity coefficient of cotton fiber is in the range of 12 ~25, the average maturity coefficient of general fine cashmere cotton is 1.5~ 20, the maturity coefficient of long cashmere cotton is more than 20. Cotton fiber maturity is generally determined according to the ratio of fiber cell wall to fiber lumen diameter. It is a comprehensive index reflecting cotton fiber strength, fineness, natural bending, water content and light. Elasticity has a great influence on the breaking strength of the processing technology and the maturity of the yarn M, the cvfA details, the coarse knotting, and the knotting 1 of the cotton.
Fiber maturity corresponding mature conditions as follows: 8 immature maturity coefficient 0 8 ~ 9 normal mature (lower) 9 ~ 10 mature good maturity coefficient 0 very mature general conditions, the fibers grow mature, cell wall thickness and sectional area is large, low fiber number, high intensity, content of cellulose, turning curve, the luster bright, dyeing performance is good, the spinning performance. When raw cotton with poor maturity (maturity coefficient below 1 00) is used, it is easy to damage fibers and form cotton knots in the process of spinning, the yarn strength is low, the strip is poor, and the impurities are difficult to remove. When dyed with dark fabric, white stars will appear on the fabric surface. However, over mature cotton fiber has less bending and poor holding force, which affects yarn quality. Therefore, the maturity of cotton fiber is an important property of raw cotton, and is one of the basis for evaluating the grade of raw cotton.
Relationship between Maturity and Spinning Technology Impurities and defects in raw cotton affect both spinning technology and yarn quality. The original cotton with different maturity has a great impact on the cleaning efficiency and the amount of impurities in the spinning process.