Yarn making principle

First, impurity removal

Spinnography is a science that studies the processing of textile short fibers into yarns. Generally, yarns are made from many short fibers of different lengths by splicing, and twisted by long continuous filaments. Combined. In the spinning process, it is necessary to remove impurities first, that is, to perform preliminary processing of the raw materials, also known as the preparation of spinning raw materials. Different types of raw materials, different types and properties of impurities, different processing methods and techniques. The primary processing methods of raw materials are mainly physical methods (such as ginning), chemical methods (such as degumming of hemp, and scouring of silk), and physical and chemical methods (such as washing and decharging of wool).

Second, release

To process the disorderly and closely related fibers into a longitudinally ordered sequence, and to have smooth yarns with certain requirements, it is necessary to turn the block fibers into a single fiber state, remove the horizontal connection of the fiber raw materials, and establish a strong end to end connection. Vertical connection. The former is called fiber dissolution, and the latter is called collection of fibers. The loosening of the fiber is to completely release the horizontal connection between the fiber and the fiber. However, the damage of the fiber must be minimized. The collection of fibers is to make the loosely processed fibers re-establish an orderly vertical relationship. This connection is continuous, and the fiber distribution in the collection should be uniform, and at the same time have a certain linear density and strength. The fiber assembly also needs to have a certain twist. The assembly process is not completed at one time, and it can be completed through multiple processes such as carding, drawing, and twisting.

Third, open

Opening is to tear large pieces of fiber into small, small fiber bundles. Broadly speaking, the degumming of hemp is also an opening. As the opening action progresses, the connection between the fibers and the impurities weakens, so that the impurities are removed and the fibers are mixed. The opening effect and the removal of impurities are not completed at one time, but are realized gradually through the rational configuration of the effects of tearing, striking and splitting.