1 Yarn evenness level
When evaluating evenness, the influence of fiber length and fineness on evenness level is mainly considered, as well as fiber uniformity, maturity, The influence of factors such as moisture content, impurity content, and short lint content. Among them, the moisture content of cotton stipulated in our country is 10%, and the maximum limit is 12%; the impurity content is 2.5% for saw-tooth cotton and 3.0% for roller cotton.
2 Yarn strength level
When evaluating the strength, the fiber roots in the yarn section are considered number, fiber length, and single fiber strength.
3 Cost of yarn raw materials
Calculated based on the weighted mixing ratio of various raw materials in each plan The cost of yarn raw materials is used as the cost evaluation index of the cotton distribution plan.
4 Yarn value
This is a comprehensive evaluation index, which takes into account both cost and Also consider dryness and strength.
5 Inventory
For each cotton distribution plan, The inventory of raw materials gives a clear answer: there are enough raw materials or not enough raw materials. This will determine whether the plan can be adopted.
For example:
OE10S (smooth, three knots are about 25% of USTER level, strong 610N)
35% raw cotton (third-grade cotton) + 65% scraps (fine falling, chopping, yardage, return)
OE16S (even stems, three knots in black The ster level is about 25%, the strength is 380N)
50% raw cotton (third-grade cotton) + 50% scraps (fine falling, chopping knife, yardage, return)
Ring spinning C21 (evenness and three knots are about 25% of USTER level, strength 436N)
100% raw cotton (third grade cotton)
Ring spinning C21 (evenness, three-section Uster level is about 75%, strength 293N)
100% raw cotton (fourth grade cotton)
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