In addition to cotton quality and blended cotton quality, the only processes that can reduce neps in knitted fabric cotton yarn quality are generally the carding process and the combing process. Of course, the winding process also has a certain effect on removing large neps caused by the previous process. , but controlling the quality of the sliver in the carding process and combing process is the key factor in reducing neps in knitted fabric cotton yarn. Different qualities of knitted fabric cotton yarn have different quality requirements for carded sliver and combed sliver.
Analysis of the generation and control requirements of different types of neps:
① Dead cotton neps are caused by too much immature fiber content in cotton, poor maturity, too much fibrous seed debris, too many neps, and too high short lint content. This requires textile mills to improve knitted fabrics. When blending cotton yarn, especially high-grade knitted fabric cotton yarn, it must be strictly based on the quality requirements of knitted fabric cotton yarn and the blending cotton standard.
② The harm of fly neps to knitted fabrics is also very serious. The most serious reasons for the occurrence of fly neps are due to poor production management, poor cleaning and cleaning work, and insufficient cleaning and cleaning. In addition, the maintenance cycle of the equipment is too long. Long, the inside of the equipment is too dirty, the refueling part of the equipment is refueled too much, the channels of the equipment are poorly clean and smooth, etc.
③ Hairiness neps are also an important factor affecting the quality of knitted fabrics. Hairiness neps are mainly caused by the short lint rate in cotton slivers and the short lint rate in cotton yarn. To reduce hairiness neps, we must: Reduce carding The short staple rate of cotton sliver and combed sliver; further keep the spinning channel clean and smooth; keep the speed of spinning frame and winding machine within a reasonable range; ensure the smoothness and correct feeding of spinning process components with their reasonable usage cycles.
④ Cotton balls on knitted fabrics are mainly caused by friction with cotton yarn fly and hairiness. Therefore, strengthening the cleaning work during the spinning and knitting and weaving processes is particularly effective in reducing cotton balls in knitted fabrics and maintaining them. The smoothness of spinning and weaving process equipment and channels can also further reduce cotton balls in knitted fabrics.
⑤ The color spots on the fabric surface of knitted fabrics are a manifestation of the large number of neps in the cotton yarn of knitted fabrics. They are generally caused by the large number of neps in cotton and blended cotton. Also, the cotton yarn has more hairiness during the winding process. It is the result of a large number of neps produced by rubbing and friction during the knitting machine process; in addition, it is caused by the large amount of fibrous seed debris in the cotton that is not removed during the spinning process and remains in the cotton yarn.
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