The purpose and basis of cotton distribution
Cotton matching is the preliminary work of the spinning process. It is based on the actual requirements of spinning, rationally selecting a variety of raw cottons for use, giving full play to the characteristics of different raw cottons, and achieving the effects of improving product quality, stabilizing production, and reducing costs. This technical work of matching raw cotton is called cotton matching.
The purpose of cotton blending
(1) Reasonable use of raw cotton to meet the actual requirements of spinning yarn products
By mixing cotton textile yarn, the characteristics of various raw cottons can be fully utilized, learn from each other’s strengths and weaknesses, and satisfy different varieties, Quality requirements for spun yarns for different purposes.
(2) Maintain relative stability in production and yarn quality
Various raw cottons have different property indicators and spinning performance. For example, if a single-mark raw cotton yarn is used, when a batch of raw cotton is used up in a few days, another batch will be replaced. When a batch of raw cotton is produced, a substantial change in raw materials will inevitably cause fluctuations in production and yarn quality. By combining yarn requirements and raw material performance, classification and queuing are implemented, and raw materials are used in combination to maintain relative stability in the production process and yarn quality.
(3) Save cotton and reduce the cost of raw cotton
Generally speaking, raw materials account for 65% to 70% of the cost of yarn. Not all indicators and spinning properties of good-quality raw cotton are good, and conversely, not all raw cotton of poor quality is bad either. For example, in mixed cotton with shorter fibers, a certain proportion of low-grade cotton with longer length is appropriately mixed. When the fiber linear density is thicker, part of the low-grade cotton with lower maturity and finer linear density is mixed, which not only reduces costs but also saves energy. Cotton also improves the quality of yarn.
Basis for cotton distribution
(1) Types and requirements of cotton yarn
Cotton textile mills produce multiple varieties, and different varieties have different quality requirements. All aspects should be considered when matching cotton.
(two ) Quality indicators of finished yarn
National standards stipulate that spinning yarn is based on two intrinsic quality indicators: quality indicator and weight unevenness, and two appearance quality indicators: evenness evenness and number of neps and impurities. grade. Selecting raw cotton with long length, fine fineness and high strength can improve the quality index of spinning yarn. Reducing the difference in properties of raw cotton in mixed cotton can reduce the weight of spinning yarn. In particular, it is necessary to make good use of the different properties of cotton from batch to batch, and select raw cotton with fine fineness, low imperfections and short fiber content to improve evenness. Selecting raw cotton with normal maturity, defects and low short fiber content is beneficial to reducing neps and impurities. At the same time, it is necessary to adjust the process parameters, air conditioning status, mechanical status, and do a good job in operation management.
AAAVBJYTUJGHNH
Extendedreading:https://www.alltextile.cn/product/product-9-265.html
Extendedreading:
Extendedreading:
Extendedreading:
Extendedreading:
Extendedreading:
Extendedreading:
ExtendedReading:
Extendedreading:
Extendedread
