Problems And Technical Measures In Spinning Process

Raw material treatment process due to Milk protein fiber Due to the high specific resistance, serious static electricity and low friction coefficient between fibers, it is easy to winding cylinder and blotching during spinning. Therefore, it is necessary to carry out necessary health treatment for milk protein fiber before putting into production, and add proper amount of antistatic agent and oil agent. This is the key to make milk protein fiber yarn well and ensure the moisture regain of milk protein fiber on the machine The optimum concentration is 13% ~ 15%. In addition, it is necessary to ensure the relative humidity of each production process, and at the same time, do a good job of moisture protection of semi-finished products in each process, so as to avoid the electrostatic phenomenon of semi-finished products in the production process, which brings inconvenience to the production.

The opening and cleaning process has the characteristics of good uniformity, less impurities and serious static electricity for milk protein fiber. In the opening and cleaning process, the process principle of short process, less grasping, more loose and less beating is adopted. In order to reduce the speed of each beater properly, sfa035c cotton opener only uses parallel beaters and skips porcupine beaters. At the same time, fa106b cotton opener uses comb needles to reduce fiber damage. In order to reduce the volatilization of water and oil in the cotton roll, the cotton roll should be wrapped in plastic film bag after being rolled, and it is required to do it first in production.

In carding process, due to serious electrostatic phenomenon of milk protein fiber and poor cohesion between fibers, it is easy to winding cylinder, doffer and apron in the production process of carding process. Therefore, it is necessary to control the running speed of each part on a low level. Meanwhile, in order to improve the fiber transfer and reduce neps, the spacing of each part should be reasonably optimized. Due to the high price of milk protein fiber, Carding The rear part of the machine is mainly made of less or no falling. The enterprise adopts the fully closed rear process, and reduces the speed of the cover plate to reduce the noil and improve the production rate.

The humidity of carding should be controlled too much when producing this variety. Generally, the relative humidity should be controlled at about 70%. In order to improve the quality of sliver, the technological principle of "light weight, slow speed and tight spacing" is adopted. In addition, the roller pressure should be controlled to reduce the damage to the fiber. In order to ensure the uniform mixing of fibers in the drawing process, the method of combining eight fibers in two drawing processes is adopted. Due to the serious electrostatic phenomenon in the production process of milk protein fiber, it is necessary to solve the problems such as winding roller and rubber roller in drawing process, especially the phenomenon of sucking under 1 and 2 rollers. Therefore, reasonable temperature and humidity should be maintained in drawing process, and measures such as separate isolation and humidification were adopted to ensure the smooth production.

In roving process, due to the small friction coefficient and poor cohesion of milk protein fiber, the fiber is easy to curl, and the roving twist factor should be larger. The roving tension should be controlled to reduce the accidental elongation of roving and improve the yarn evenness and unevenness. In order to improve the roving evenness, the draft ratio in the back area of roving should be controlled to a small extent, and the spacing in the back area of roving should be properly enlarged. In order to ensure the smooth production, steam humidification is adopted.

　　 Spinning In order to improve yarn quality, improve yarn evenness and reduce yarn defects, the technological principle of "large roller spacing in front and back area, small draft multiple in back area and small gap between nips" is adopted in spinning process. In addition, in order to ensure that the workshop life is easy to do, the workshop adopts local humidification measures to control the relative humidity of the product at about 68%, so as to reduce the winding roller, cot and other problems caused by static electricity, resulting in a large number of yarn defects.