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 impact on the large neps caused by the previous process. It has a clearing effect, but controlling the quality of the sliver in the carding process and the 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.
Generation of different types of neps and control requirements analysis:
① Dead cotton neps are due to too much immature fiber content in cotton, poor maturity, too much fibrous seed debris, and too many neps. , caused by too high short staple content, which requires textile mills to strictly comply with the cotton blending standards for knitted fabrics, especially high-end knitted fabrics, according to the quality requirements of knitted fabrics and cotton yarns.
② Flying neps are also very harmful to knitted fabrics. The most serious causes of flying neps are poor production management, poor cleaning, Insufficient cleaning, etc.; in addition, the maintenance cycle of the equipment is too 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 Hairy neps are also an important factor affecting the quality of knitted fabrics. Hairy neps are mainly caused by the short lint rate in the cotton sliver and the excessive short lint rate in the cotton yarn. Caused by hairiness neps, it is necessary to: reduce the shortness of carded slivers and combed slivers; further keep the spinning channel clean and smooth; keep the speed of the spinning frame and winding machine within a reasonable range. Within; ensure the smoothness of spinning process components and give them a reasonable life cycle.
④ Cotton balls on knitted fabrics are mainly caused by friction with cotton yarn fly and hairiness, so the cleaning work during the spinning and knitting and weaving processes should be strengthened. It is particularly effective in reducing cotton balls in knitted fabrics. Maintaining 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 more neps in the cotton yarn of knitted fabrics. They are generally caused by the large number of neps in cotton and blended cotton. , there is also the result that the cotton yarn has more hairiness and a large number of neps are produced by rubbing and friction during the winding process and the knitting machine process; in addition, due to the large amount of fibrous seed debris in the cotton, there is no It is caused by being removed and remaining in the cotton yarn. </p
