Three methods of spinning and cotton

Taking the yarn strength as an example, the following are the main indicators of the physical properties of raw cotton, such as length, fineness, maturity and short pile rate . When the length of the fiber is long, the contact area between the fibers is large, and the mutual abutment points are large, so the cohesion force is also large, and the strength of the yarn is naturally increased. When the fineness of the fiber is fine, the number of fibers in the yarn-forming section is increased, and the yarn is strong. It also increases; when the fiber matures, the strength is high, and the yarn strength is also large; as for the short velvet, the floating structure of the yarn can be caused by the floating state during the drawing process, causing it to be subjected to tension. Weak ring, and more short velvet, the cohesive force between the fibers is poor, and the sliding off-line will increase when pulled, so it is unfavorable to the yarn, such as: neps, impurities, hairiness, etc. in the yarn, in the same process Directly determined by the nature of the raw cotton.

Raw cotton linters is high, the yarn hairiness large (except reason mechanical friction), the yarn evenness CV large; heteroatom-containing raw cotton large, multiple defects, poor maturation, the yarn neps, impurities Just more. According to the above analysis, after the establishment of the cotton blending scheme, suggestions can be made for some related processes in the production, and the effective control of a certain process can be carried out in a targeted manner, and the production initiative can be mastered in advance, and the quality hazard that may be caused by the raw cotton is in the yarn. Eliminate before, and should be controlled early, eliminated early, play a role in forecasting and forecasting .

Generally speaking, the “sorting and queuing” that cotton mills call is the method of matching cotton earlier. Although very original, it is more practical. Many cotton mills are still in use today. Classification is based on the nature of raw cotton and the different requirements of various yarns. The original cotton of a certain number of yarns is classified into one category and divided into several categories. The queuing is to arrange the raw cotton in the same category in different groups, such as regions and nature, in order to replace them. Cotton should be considered both at the present and in the future. It is necessary to consider key varieties and take care of the general varieties. From the actual needs and possibilities, it should be replaced by priority, and the arrangement should be reasonable and appropriate so that the raw cotton components used in each variety do not produce. Significant changes to maintain the stability of production and yarn quality.

In addition, it must be mentioned that some of the flowers produced in each process, such as broken cotton rolls, tampon, roving heads, roller flowers, bellows flowers, etc., as well as some re-use cotton, such as smashed seeds, sputum flowers and fine Falling, etc., in use, we must grasp the scale and use it reasonably. Otherwise, although it saves a little cotton, it destroys the yarn quality, which will not be worth the candle.

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