Study on the influence of the cotton storage process on the quality indicators of fiber and yarn

Abstract

This article defines fiber quality indicators that differ in laboratory conditions from the upper, middle and lower layers of Bukhara-6 breeding varieties of cotton, in the modern system HVI 1000 SA. Based on the results of the study, histograms of changes in the quality of cotton fiber in the layers of the harem are presented. As an alternative, the quality indicators of yarn obtained in the laboratory spinning device “Sherli” of small size from fiber were determined. As can be seen from the analysis of the test results, it was found that the comparative elongation strength of cotton obtained from the lower layer of the stack, the upper average length, elongation at break, the light output coefficient, decreased compared to other layers of the stack, on the contrary, the index of hip fibers, increased, decreased compared to other layers of the stack. In addition, according to the results of the tests obtained, the fiber viscosity index was obtained – the correlation between the properties of fibers and the properties of yarn, the thread viscosity index was estimated by the CSP (COUNT STRENGTH PRODUKT) coefficient, which was determined by the formula for carded yarn obtained in the laboratory spinning device “Sherli” from fiber stored in the refrigerator. The obtained results showed that the relationship between fiber properties and yarn properties due to the fact that the maturity index of a thread is at the top of the stack compared to the middle and lower part of the stack.

Improving the efficiency of dust collectors and modernization of the aspiration system in cotton cleaning plants

“…Average daily concentration of nitrogen oxide is 0.164 mg/m 3 , which does not exceed MPC (0.2 mg/m 3 ). Maximum single concentration is 0.128 mg/m 3 , which also does not exceed MPC [9,10].…”

Investigation of air velocity in expanding and contracting pipes for the transport of fibrous materials

“…If the speed of the air flow is further reduced, then after 18 m/s the particles of fibrous materials fall to the bottom of the pipe and move unevenly, bouncing. The results of monitoring the process of air transportation of fibrous materials showed that the raw materials are unevenly transferred to the pipes of pneumatic transport [5][6][7]. As a result, the cotton moves in separate sections in the pipe, somewhere concentrated, and somewhere in a rarefied state.…”

Study on the effect of cotton fiber temperature on cleaning effects

“…The cleaning efficiency, in turn, was 42.9-54.4%, and an increase in the hot air velocity from 2.5 m/s to 7.0 m/s was found to accelerate the evaporation of moisture from the cotton. Studies of several researchers [13][14][15][16] showed that the temperature of cotton fiber in the technological process of cotton ginning was recommended to be 45-50 0 C, in this case, the moisture content of cotton was considered to be optimal for the ginning process. Based on the above analysis, it can be said that in order to achieve high cleaning efficiency of raw cotton, the process of crushing and shaking of raw cotton, which is transferred to ginners, leads to intensive spillage of contaminants in cotton, facilitating further spillage of contaminants.…”