Akademik Məlumat İdarəetmə Sistemi
Izvestiya Vysshikh Uchebnykh Zavedenii, Seriya Teknologiya Tekstil'noi Promyshlennosti, no.6, pp.63-71, 2023 (Scopus)
The questions of designing a complex quality index of yarn appearance are considered. It has been established that the improvement of finished product quality in textile enterprises directly depends on systematic and effective quality control of semi-finished products and raw materials at all stages of textile production. When determining the quality of the product obtained in spinning production, the appearance of the yarn is evaluated. The consumer properties of the finished product depend in many cases on the appearance of the yarn. The yarn purity class is determined by the composition of external defects in the yarn. The existing methods of determining the yarn purity class based on organoleptic and mechanical methods are not efficient enough. As a result of the conducted researches by methods of qualimetry, single indices characterizing the yarn appearance were determined. The attribution of this or that investigated image to a particular class of objects in accordance with the found values of signs is made according to the decisive rules formulated by the authors. On the basis of the method of expert assessments, the dependencies between the values of single indicators and the point expert assessment, which are represented by linear functions, have been established. The value of the concordance coefficient of 0.86 was obtained for the survey carried out in the course of the work, which indicates good consistency of expert opinions. As an indicator of the desirability of each of the proposed single quality indicators, the average value of the scores on the indicator was used. The weighting of single indices was determined, and expressions for the complex evaluation of the quality of appearance of the most widespread types of cotton yarns with linear densities of 50 and 20 tex were obtained.