Spinning is a science that studies the processing of textile short fibers into yarns. Yarns are usually made of a number of short fibers of different lengths by twisting, and twisted together by a long continuous monofilament. In the spinning process, it is first necessary to remove the blemished defects, that is, the initial processing of raw materials, also known as the preparation of spinning raw materials. Different types of raw materials, different types and properties of impurities, processing methods and arts are also different. The primary processing methods of raw materials include physical methods (such as cotton ginning), chemical methods (such as degumming of hemp, scouring of silk silk), and the combination of physical and chemical methods (such as wool washing and peat removal).
It is necessary to turn the lump fiber into a single fiber state, to dissolve the transverse connection of the fiber material, and to establish a strong longitudinal connection between the first and the end connection. The former is known as the release of fibers, and the latter is called the collection of fibers. The release of fibers is a complete elimination of the horizontal connection between fibers and fibers. However, fiber damage must be reduced as far as possible. The collection of fibers is the reestablishment of an orderly and orderly longitudinal connection of the loosened fibers. This connection is continuous, and the fiber distribution in the collection should be evenly distributed, with a certain line density and strength at the same time. Fiber assemblies also need a certain twist. The assembly process is not completed at once. It can be completed through many processes such as carding, drafting and twisting.