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Cotton blended yarns improve the yarn quality, and often use a pre-polyester article, to reduce the weight of the polyester strip unevenness, to improve the accuracy of the blending ratio, and increase the straight and parallel strips of polyester fiber. After the sliver is combed, it can remove the short velvet and knots and make the fiber straight and smooth . Then, the polyester strips and the slivers were mixed three times to ensure that the blending was adequate and the fabric dyeing process of "two-in-one" was performed. Sometimes the process of "three draws and one roving" is used for the purpose of mixing well.
   Spinning is the final process of yarn. The spinning machine applies a certain amount of draft to the fed roving, draws it to the required linear density, and adds appropriate twist to make it become a certain strength and elasticity. The physical and mechanical properties such as gloss and spun yarns, at the same time, the fine sand is rolled according to certain requirements, so that it can be transported, stored, and processed in the following processes.
Through the above-mentioned various processes, multiple drafting and head retraction. The bundle fibers are separated and straightened and twisted into yarn. At the same time, after multiple mergers, the uniformity of the long pieces of the sliver is improved. The blended product can also improve the leveling of the product due to the thorough mixing of the fibers.
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Drawing, roving and spinning processes
P comb system and the number of bars and the roving process to follow track "odd Guidelines", i.e., the number of channels between the carding device and the roving process according odd configurations, such as "two pass and rent a yarn." Since most of the fibers in the sliver of the sliver are bent back (approximately 50% or so), many “backwards†fibers can be straightened when drafted on a spinning machine. Rotor spinning generally uses two parallel processes.