Multi-fiber color-mixed semi-worsted antibacterial yarns and spinning technology thereof

The invention relates to multi-fiber color-mixed semi-worsted antibacterial yarns which are formed by spinning the following fibers in percentage by weight: 20-40 percent of coffee carbon fibers, 20-25 percent of porel fibers and 25-35 percent of modal fibers by a semi-worsted technology. A spinning technology sequentially comprises a cotton carding technology, a drawing technology, a roving technology, a spinning technology and a spooling technology. The multi-fiber color-mixed semi-worsted antibacterial yarns are formed by blending multiple fibers; characteristics of every type of fiber are highlighted by reasonably arranging the weight proportion of the fiber; the advantages of the fibers are integrated, so that the basic performance of the yarns is retained, and an antibacterial function is guaranteed. Compared with a worsted technology, the semi-worsted technology has the advantage of shorter flow process; semi-worsted yarns are looser and more flexible than worsted yarns and are more uniform and more bright than roved yarns; furthermore, the colored coffee fibers are blended into the semi-worsted yarns, so that dyeing is not needed in the whole flow process, and the whole flow process is environment-friendly and energy-saving.