Faced with the current severe situation in the textile industry, spinning companies actively use multi-fiber combinations to develop new yarns to replace conventional yarn production, which is an inevitable trend to adjust product structure and upgrade products. In recent years, the production practices of many spinning enterprises have shown that multi-fiber combined spinning has many advantages. We can use strong points to make up for weak points, give full play to the complementary advantages of fiber performance, improve yarn performance, expand yarn varieties and usage range, better avoid product homogeneity competition, and increase corporate profit margins. Multi-fiber combined spinning should pay attention to the key points of many technologies, and now we will focus on the spinning process.
Optimize the spinning process to ensure stable yarn quality. The yarn quality and smooth production of multi-component spinning depend on whether the carding degree of different fibers is reasonable. Therefore, carding The process configuration of the process and the selection of carding elements are the keys to the multi-component blending process.
Insufficient fiber combing will produce defects such as bundles and neps. These defects cannot be effectively removed during post-processing and will affect yarn quality. Excessive carding will cause fiber damage and increase short pile, affecting the smoothness, evenness and pilling resistance of the yarn. Especially when processing dyed cotton, viscose staple fiber, bamboo fiber, wool, cashmere and other low-strength fibers as well as fine fibers, a gentle carding process should be adopted, and the ration should be appropriately reduced, the speed of each carding piece should be reduced, and the speed of each carding piece should be increased. The cylinder and licker-in speed ratio speeds up fiber transfer and reduces fiber damage and neps.
The selection of carding elements should also be “tailor-made” according to the different fibers used. The specifications and models of carding elements for spinning natural fibers such as cotton and wool and spinning chemical fibers must be strictly distinguished. , avoid using “universal card clothing”. In addition, most new fibers tend to have poor spinnability and low single fiber strength. Therefore, the cleaning process should be based on “opening, loosening more and beating less. The speed should not be too fast, and the spacing should be moderate to reduce fiber damage.” In principle, the cotton lap ration should be appropriately heavier to improve the cohesion of the fibers. In the thick and fine processes, the drafting and pressure distribution of each process should be optimized, the ration should be appropriately reduced, and the speed of rollers, spindles, etc. should be reduced to reduce end breakage. At the same time, the appropriate hardness should be selected For the rubber roller and apron, adjust the coating ratio to improve the anti-winding performance and reduce the probability of “three windings”.
The winding process should set the parameters of the electronic yarn clearer according to the characteristics of the fiber, and use ” “Low speed, low tension” process reduces yarn hairiness and end-break rate, and improves equipment operation efficiency. In addition, according to the production practice of Yunshan Textile Company for many years, many new fiber blended yarns such as “Tianrou yarn”, “Rou Yarn” “Fleece yarn”, “ribbed yarn”, etc., during the processing of the winding machine, it is also necessary to focus on preventing the yarn on the big end of the package from being worn off or the high speed causing high temperature to melt the synthetic fiber with a lower melting point. Due to multi-fiber blending Most yarns require additional raw material pretreatment and mixing equipment, and the ration and speed of each process are reduced to a certain extent. Therefore, the equipment and personnel configuration of the pre-spinning process need to be appropriately increased. This will increase the spinning cost to a certain extent, and should be considered during product design. Consider this factor.</p
