Spinning is a science that studies the processing of textile staple fibers into yarns. The yarns are usually made by a number of short fibers of varying lengths, and are made of long continuous filaments.
In the spinning process, it is first necessary to remove the impurities, that is, the preliminary processing of the raw materials, which is also called the preparation of the spinning raw materials. The types of raw materials are different, the types and properties of impurities are different, and the processing methods and processes are also different. The primary processing methods for raw materials are physical methods (such as ginning), chemical methods (such as degumming of hemp, refining of silk), and physical and chemical methods (such as wool washing and de-charging).