Cotton yarn is a yarn made by spinning cotton fiber, and it is called cotton thread after ply processing. According to different spinning processes, it can be divided into carded yarn and combed yarn. (1) Carded yarn: It is a yarn spun from cotton fiber through an ordinary spinning system. (2) Combed yarn: it is a yarn spun from cotton fiber through a combed spinning system. Combed yarns are made of high-quality raw materials. The fibers in the finished yarn are straight and parallel, with less knots, good luster, evenness, and high strength. This type of cotton yarn is mostly used for weaving high-end fabrics.