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, consider The influence of fiber number, fiber length and single fiber strength in the yarn cross section.
3 Cost of yarn raw materials
According to each plan The raw material mixing ratio is weighted to calculate the yarn raw material cost as the cost evaluation index of the cotton blending plan.
4 Yarn value
This is a comprehensive evaluation index , which considers not only cost, but also efficiency 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 at about 25% of USTER level, strong 610N):
35% raw cotton (third-grade cotton) + 65% scraps (fine falling, chopper, yardage, return pattern)
OE16S (The evenness and three knots are about 25% of the USTER level, and the strength is 380N):
50% raw cotton (third-grade cotton) + 50% scraps (jingluo, chopper) , yardage, pattern return)
Ring spinning C21 (evenness, three knots are about 25% of USTER level, strength 436N):
100% raw cotton (third grade cotton)
Ring spinning C21 (even even, three-section Uster level is about 75%, strength 293N):
100% raw cotton (fourth grade cotton)
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