Examples of different quality yarns dominating the proportion of cotton
To sum up, different manufacturers must consider the following factors when blending cotton:
1. Yarn evenness level
When evaluating evenness, the main consideration is the influence of fiber length and fineness on evenness level. The influence of fiber uniformity, maturity, moisture content, impurity content, short lint content and other factors are also considered. 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 influence of the number of fibers in the yarn cross section, fiber length, and single fiber strength is considered.
3. Cost of yarn raw materials
Calculate the cost of yarn raw materials weighted according to the mixing ratio of various raw materials in each plan as the cost evaluation index of the cotton distribution plan.
4. Yarn value
This is a comprehensive evaluation index, which takes into account not only cost, but also evenness and strength.
5. Inventory
Give a clear answer to the inventory situation of various raw materials in each cotton distribution plan: enough raw materials or not enough raw materials. This will determine whether the plan can be adopted.
For example:
OE10S (evenness and three knots are about 25% of USTER level, strength 610N):
35% raw cotton (third-grade cotton) + 65% scraps (fine falling, chopper, Number of yards, return pattern)
OE16S (evenness and three knots are about 25% of USTER level, strength 380N):
50% raw cotton (third-grade cotton) + 50% scraps (finished, chopped knife , yardage, pattern 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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