With the development of the textile industry and the large number of shuttleless looms, the requirements for yarn hairiness have become more stringent.
Hairiness refers to the fiber that extends out of the surface of the yarn body. The main factors influencing the yarn hairiness include the physical properties of the fiber, the structure of the semi-finished product, the temperature and humidity of the workshop, the condition of the equipment, especially the smoothness of the yarn channel in each process equipment, and the rational design of the process parameters of each process.
In the ring spinning system, since yarn formation is performed on a ring spinning machine, although raw materials, the degree of smoothness of the semi-finished products, etc., have an important influence on hairiness, the real yarn hairiness is the first Ring spinning machine. In the post-spinning and weaving preparation process, in addition to the sizing process, the other processes also increase the number of hairiness, making the hairiness
Increase in length.
The reasons for hairiness on the ring spinning machine are:
(1) At the time of twisting, the tip of the fiber at the edge of the twisting triangle was not formed by the body of the gauze and formed hairiness.
(2) During twisting and twisting, hairiness is caused by friction between the yarn and guide yarn hooks, wire loops and other elements.
(3) During the twisting process, due to the effect of centrifugal force, the fiber ends in the already twisted yarn body are thrown out to form hairiness.
(4) In the process of twisting, foreign flies and linters are attached to the yarn body and partially into the yarn, forming an undirected hairiness.
Winding, warping, threading, weft and other processes will increase the number of yarn hairs, hair length
It is mainly due to the friction effect of various parts on the yarn.