[Textile knowledge] 3 methods of spinning and cotton

1. According to the specific data of the physical properties of the raw cotton, the cotton is fed.

It is necessary to control the physical properties of the blended cotton and ensure that the indexes of the batch of raw cotton are stable.

First of all, it is necessary to formulate cotton index (length, fineness, maturity, strength, short-staple rate, etc.) for each variety to be spun and the range of allowable differences for each indicator. The indicators and differences of raw cotton can be strictly determined at the time of formulation.

Secondly, it is necessary to consider the stock of raw cotton, the inventory can be strict, and the inventory can be loose, so as not to be difficult to implement. When selecting cotton for key varieties of enterprises, it is necessary to carefully consider and minimize the range of differences, that is, to ensure that the average value of various indicators in the mixed cotton is controlled within the range, and to ensure that the indicators of the two batches of cotton before and after the replacement are close, It is not advisable to use a simple average for the indicator, but to average the weight percentage.

When the cotton is blended for general products, the range of indicators and differences can be relaxed, and only the average value of the main indicators of the blended cotton can be within the specified difference range. Generally speaking, the difference between the batches of raw cotton is as small as possible. The difference between the various types of steamed bread in the mixed cotton may be slightly larger. Sometimes, although some properties of the raw cotton are more different, there is no disadvantage to the quality of the yarn, but the quality may be Improved.

For example, in the cotton blending component with shorter fibers as the main component, appropriately match the longer fibers, or in the cotton blending component with the coarser fibers as the main component, properly mix the finer fibers to improve the strip and improve the yarn. Power has certain benefits. The key is to ensure the consistency of the subsequent raw cotton.

2. Guide cotton blending according to spinning principle and spinning experience

Taking the yarn strength as an example, the following are the main indicators: the main indicators affecting the yarn strength in the physical properties of raw cotton are 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 contact 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. The weak ring, and the short velvet, the poor cohesion between the fibers, the sliding off the line will also increase when pulled, so it is not good for the yarn.

For example, the neps, impurities, hairiness, etc. in the yarn are directly determined by the properties of the raw cotton in the same process. In the raw cotton, the rate of short velvet is high, the hairiness in the yarn is large (except for mechanical friction), and the CV value of the yarn is large; the raw cotton contains large impurities, many defects, and poor maturity, so the neps and impurities in the yarn many. According to the above analysis, after the establishment of the cotton blending design plan, 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 rights are grasped in advance, and the quality hazards that may be caused by the raw cotton are in the yarn. Eliminate before, and should be controlled early, eliminated early, play a role in forecasting and forecasting.

3. Comprehensive cotton blending according to stock raw cotton

What the cotton mills call "classification and queuing" is the earlier method of cotton blending. Although very primitive, 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 several categories and is 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 in the future 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 are not produced. 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 the whole seed, sputum 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.

In short, the cotton-filling work cannot be adapted to the current situation of increasingly fierce competition in production and market by a single method. In today's information age, the use of computers for cotton blending is an inevitable trend in the development of cotton blending technology, and it can also bring a new level of yarn quality.

The content of this article is selected from: Cotton Textile Technology New Media

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