Sun Boyong, General Manager Of Zhejiang Chun Jiang Light Textile Refco Group Ltd, Talking About Super Imitation Cotton Yarn

Super Imitation cotton fiber, also known as the new generation of polyester cotton imitation fiber, is a high simulation functional fiber which is mainly used to replace natural fiber resources such as cotton. In recent years, Chun Jiang light textile group and suppliers of raw materials and downstream products revolve around " Super Imitation cotton "Fiber" has developed many new products and achieved good economic benefits.

　　 Super Imitation cotton fiber Excellent performance

The super Imitation cotton fiber developed by Chun Jiang company is mainly Shu Chao cotton fiber. Shu Chao cotton fiber is a new honeycomb microporous structure modified polyester staple fiber. It has been developed. Honeycomb bamboo charcoal fiber Honeycomb anti ultraviolet fiber, honeycomb antibacterial fiber and honeycomb photocatalyst fiber and other products. This kind of product is designed and developed mainly for improving the defects of conventional polyester fiber in wearability. It is a new type of modified polyester fiber for textile, which has the properties of moisture absorption, quick drying, anti fuzzing, anti wrinkle, easy to decontamination, antistatic and degradable. It is different from the wet and perspiration polyester fibers produced at home and abroad. It not only changes the surface morphology of the fibers, but also forms a honeycomb like structure inside and outside the fibers. The fiber has a large surface area, and the pores and micropores are interconnected with each other, and it communicates with the surface of the fiber. The flexible factor and other materials are added in the process of improving the fabric, so that the fabric made of it has better softness, and its performance will not decrease due to the increase of washing times. At present, the moisture regain of honeycomb modified fibers can reach 2%, which is 5 times that of conventional polyester fibers and can be degraded in 2 years.

Honeycomb functional series fibers are widely used for knitting, bedding and non-woven fabrics, medical gauze and so on. At present, the proportion of Shu cotton short fiber blended with other fibers is 30% to 50%. The company has developed three in one, four in one blended products such as Shu Chao cotton and combed cotton, Tencel, modal and other modified polyester, and has formed mass production.

　　 Optimizing process parameters to improve yarn quality

With super Imitation cotton fiber as raw material, Chun Jiang company has made trial production and development of pure cotton and combed cotton blended products. In the process of developing super Imitation cotton polyester yarn products, the company has encountered various difficulties, especially to solve the problem of how yarn meets the characteristics of fabrics and the spinnability of various processes. The company constantly optimizes the technological parameters of each process, striving to improve the yarn quality, thus meeting the needs of customers. At present, the yarn quality developed by the company is stable and has been recognized by our customers.

According to the characteristics of super Imitation cotton fibers with good uniformity and almost no impurities, and the measured fiber strength is lower than that of conventional polyester fibers, the short flowsheet process is adopted in the cleaning process, followed by the technological principles of "less grasping, frequent grasping, moderate attack and reducing whiteness". Improve the running efficiency of the cotton catching trolley, achieve the goal of less grasping and grasping frequently, adopt a suitable speed of the driver, reduce fiber damage, reasonably set the self leveling parameters, and improve the evenness of the cotton rolls.

The carding process adopts the principle of "combing, reducing striking, large spacing, low speed, big speed ratio and quick transfer". Reduce the speed of the needle roller, enlarge the gap between the cylinder and the cover, use light weight bar to quantify, take overall consideration, strengthen the fiber combing function, and reduce fiber damage. Use lower cover speed, reduce cover flowers, reduce the number of white flowers, pay attention to moderate tension of cotton web, and pay attention to cotton mesh clarity, no cloud spots and holes, to ensure carding effect.

The process principle of "multi combination, large spacing and reasonable draft" is adopted in the drawing process. In the production of pure spinning, 6 combined and 6 times drafting processes are used to enlarge the draft area to 1.80 times. Two, 8 combined processes are adopted to reduce the drafting ratio to 1.50 times in the back zone. Because the super Imitation cotton fibers are more fluffy, it is easy to block the bars at the entrance of the slanting pipes of the parallel bars. Therefore, it is necessary to reduce the final quantity, increase the tension of the strip and reduce the drawing speed of the strips, so as to improve the blocking phenomenon of the crowding. When the cotton blended with super cotton and cotton blended, the drafting ratio of the head and back area is 1.78 times, and the combined number is 5T/2CJ, two and 1.58 times the draft in the back zone, three and 1.35 times in the back zone drafting, two and three in the combination. Finally, the high speed drawing frame with self levelling is used to improve the evenness of sliver sliver.

The roving process adopts the principle of "large spacing, large draft area multiple draft, light roving quantitative and proper roving twist factor". The spinning tension should be adjusted reasonably to ensure that the tension of the size yarn and the front and back yarn is basically the same, and the yarn defects of coarse and fine yarn caused by poor tension are reduced. Due to the consideration of pure spinning and blended yarns, siro spinning is necessary, so the design of roving must be light.

The spinning process adopts the principle of "large spacing, heavy pressure, reasonable back zone draft and jaw gap". Use Shaw 75 degree front roller to enhance the grip ability of front jaw. Attention should be paid to the selection of ring travellers, reasonable service life of the travellers and improvement of yarn hairiness. Using new pin and carbon fiber upper pin to improve yarn evenness. It is necessary to strengthen the maintenance of winding parts, reasonably set the speed of spinning, reduce the broken ends of spun yarn, and increase the unit output of spinning.

Siro spun yarn is better than ordinary ring spinning single yarn and hairiness yarn, but its thickness is longer than ordinary ring spinning. Because the fibers of Siro jaws are easily lost, resulting in a significant increase in yarn detail. Therefore, siro spinning should pay attention to the distance between the double horn and the size of the suction air, and reduce the details caused by the loss of the fiber.

In order to control the increase of yarn hairiness, the winding process uses a lower winding speed and proper winding tension to ensure the shape of the bobbin is good; a reasonable cleaning curve is set up, the harmful yarn defects are effectively eliminated, unnecessary yarn cutting is avoided, the strength and appearance quality of the joints are checked, and the quality abnormity is detected and handled in time by using the quality monitoring and alarm functions of the automatic winder.