Development And Significance Of Textile Cotton Blending Technology

1, cotton blending overview

　　 Cotton blending It is a basic work of cotton spinning enterprises, which is closely related to cotton spinning production, product quality and variety, and also related to raw material supply, inspection, test and production use management. According to the quality requirements of yarn and the characteristics of raw cotton, we should work out the best plan for cotton blending. Reasonable selection of multiple cotton combinations can give full play to the characteristics of different raw cotton and complement each other. Cotton blending can not only improve production efficiency, stabilize and improve yarn production and quality, but also have a significant impact on reducing spinning cost and saving cotton consumption. Therefore, cotton blending has very important technical and economic significance in textile enterprises.

With China Cotton quality With the further development of the inspection system reform and the implementation of the new national cotton standard, the quality of raw cotton and the HVI data of raw cotton in the cotton blending management system are analyzed by using the instrument to check the quality of raw cotton. Combined with the products needed by enterprises, it is convenient for enterprises to purchase raw cotton in advance, and the fine management of raw cotton is realized. At present, the acquisition, processing, sale and use of raw cotton has been turned to HVI tester, and each cotton bag has a HVI data. According to the performance index of raw cotton, through reasonable cotton blending to improve the utilization ratio of raw cotton, great economic benefits will be produced. Computer aided cotton blending using HVI data is one of the developing directions of cotton spinning technology. Computer technology is used for cotton blending instead of manual complicated and inaccurate calculation, which improves the stability, rationality and economy of cotton blending quality.

2, classified queuing method

The traditional cotton blending method in cotton mills is classified queuing. Classification is based on the properties of raw materials and the different requirements of different yarns. It selects and classifications raw cotton suitable for producing certain products or yarns of a particular number and uses, and can be divided into several categories. The so-called queuing is the same type of raw cotton, according to the region, nature, quality basically close to a team, in order to replace the use. The classified queuing method is a scientific cotton blending method which has been summed up in the long term production practice in China. The advantage is that the cotton blending component of a variety of yarns has been arranged in a planned way, and the whole cotton distribution work has been planned, which can ensure the stability of the blended cotton and improve the yarn quality from the original basis, and achieve the purpose of saving cotton and reducing the cost.

3, HVI data

The HVI data are numerous, and each index has mutual influence, and there are always some contradictions between various indicators. According to the data, generally speaking, the length, evenness index, breaking strength and micron value of cotton upper half are the main indexes for cotton production.

The length of the upper part. The length of the upper part is one of the most important quality indicators of raw cotton. The longer the fibers, the more contact opportunities between fibers. The saturation force between fibers increases and yarn strength increases. Especially when spinning fine or super fine yarns, fiber length has a more significant effect on yarn strength.

Regularity index. The index of fiber length uniformity is the degree of uniformity or regularity of fiber length distribution, which has important influence on yarn evenness, and also affects yarn strength and raw cotton production rate.

Fracture specific strength. When the breaking strength is large, the fiber density is small or the strength is high, which is advantageous to yarn strength. Because the fiber is not easy to break, the cotton is less and the production rate is high, which helps to reduce the amount of cotton used.

Micron value. The effect of micron value on yarn quality is the combined effect of fiber fineness and maturity on yarn quality. For the same raw cotton variety, the micron value is high, the fiber is over ripe, the natural curl is few, and the yarn number is good. Micron value is too low, cotton fiber is prone to produce harmful defects, dyeability, breakage rate is high, yarn strength is also low.

4. Computer assorting cotton system

With the wide application of computer technology in various industries, it will also greatly help textile and cotton blending. The traditional textile matching is mainly done by technical personnel. The effect depends largely on the experience and the degree of meticulous handling of the problem. Therefore, a more effective and convenient modern cotton distribution system came into being, and has been developed and applied widely. With the help of convenient HVI data, the computer matching system can complete complex calculation and get a better cotton blending plan.

Data show that computer based cotton distribution system based on HVI data (Computer Aided)
System, hereinafter referred to as CAS) has been applied in Anhui Yuhua Textile Co., Ltd. CAS mainly includes: the electronic management of raw cotton storage based on bar code, the classification and grouping of cotton bags based on HVI data, the optimization of automatic cotton blending, the packing of cotton bags and the prediction of cotton yarn quality. CAS can realize the electronic management of raw cotton storage, optimize cotton blending scheme, predict cotton yarn quality through cotton distribution results, and provide reference scheme for raw cotton procurement according to spinning requirements. The application practice shows that CAS can predict yarn quality, and measures can be taken in a targeted way to optimize cotton blending plan, improve labor efficiency and reduce production cost.

U.S.A Cotton Corp Since 1982, the cotton blending management system has been promoted to cotton mill (Engineered Fiber).
Selection, hereinafter referred to as EFS), so far, all textile enterprises in the United States have managed, through the EFS system, the purchase, transportation, storage and matching management of cotton, so as to achieve uniform and stable cotton distribution. Zhengzhou Chao Ge spinning Co., Ltd. began to apply the system in 2007. They had done EFS and artificial cotton contrast test, and used the same batch of American cotton and the same process conditions to spin JC.
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The results of Tex knitting yarn show that the cotton blending with EFS is more scientific, stable and consistent. The yarn strength and cotton consumption were also better, and no transverse phenomenon was observed. At the same time, EFS can also provide reference for the next purchase of raw cotton, avoid excessive purchase and save liquidity.

In order to better meet the product quality requirements, control the production cost and maximize the economic benefits, we must aim at the quality requirements of different products, and combine the experience cotton distribution and the cotton assorting with the cotton according to the HVI data of raw cotton. Proper use of raw cotton with different qualities and scientific cotton blending method can effectively control yarn quality and cost. At the same time, we should also see that the adoption of computer assorting cotton is an inevitable trend in the development of cotton blending technology, and is also a necessary step for the development of industrial informatization in cotton textile enterprises.

At present, the feasibility study and project proposal of a project being carried out by academician Yao Mu is: the State Council's construction of a typical demonstration base for cotton gin and cotton blending and cotton blending design in the process of promoting cotton circulation system reform and cotton inspection system reform. I believe that in the near future, computer automatic cotton blending technology will surely contribute to the realization of the dream of China's textile power.