Proportion of cotton with different quality yarns
When evaluating the dryness, the influence of fiber length and fineness on the dryness level is mainly considered, and the influence of factors such as fiber uniformity, maturity, water content, impurities, and short pile content are also considered. Among them, China's cotton moisture content is 10%, the maximum limit is 12%; the impurity rate is 2.5% of sawtooth cotton, 3.0% of top roller cotton.
Yarn strength level
When evaluating the strength, the influence of the number of fibers in the cross section of the yarn, the fiber length, and the strength of the single fiber are considered.
Yarn raw material cost
Calculate the raw material cost according to the weight ratio of various raw materials in each plan as the cost evaluation index of the cotton blending plan.
This is a comprehensive evaluation index, which considers both cost and organization and strength.
Give a clear answer to the stock of various raw materials in each cotton blending plan: raw materials are enough or raw materials are not enough. Based on this, determine whether the program can be adopted.
OE10S (straight, three knots at the Uster level of about 25%, strong 610N): 35% raw cotton (three-grade cotton) + 65% scraps (fine fall, chopper, yardage, flower return)
OE16S (straight, three sections at the Uster level of about 25%, strong 380N): 50% raw cotton (three-grade cotton) + 50% scraps (fine fall, chopper, yardage, flower return)
Ring spinning C21 (strand, three knots at the Uster level of about 25%, strength 436N): 100% raw cotton (third-grade cotton)
Ring spinning C21 (strand, three-section Uster level about 75%, strong 293N): 100% raw cotton (four-grade cotton)