COMPREHENSIVE ASSESSMENT OF QUALITY INDICATORS OF HOSIERY PRODUCTS

Аннотация

In this article, a comprehensive evaluation diagram was formed by studying the physical and mechanical properties of hosiery products with different compositions and recommendations were made to manufacturing enterprises for samples with the highest quality indicators. Keywords: comprehensive assessment, hosiery products, air permeability, water absorption, spandex Introduction. Comprehensive assessment of the quality indicators of hosiery products is of great importance in the modern textile industry. With increasing market demands, consumers are paying attention not only to the appearance of the product, but also to its comfort, durability and aesthetic properties. Based on this, the development of scientifically based approaches to comprehensively analyze the quality of hosiery products, determine its main indicators and evaluate them is one of the current issues. In a comprehensive assessment of product quality, analyses are carried out on individual and generalized indicators. This process covers the physical and mechanical properties of hosiery products - such indicators as air permeability, water absorption, tensile strength, resistance to deformation and friction. A comprehensive assessment also shows whether the product meets the requirements of international and national standards and the level of quality based on consumer requirements. The integrated use of modern scientific approaches, instrumental, organoleptic, expert and differential methods allows for a comprehensive assessment of the quality of socks. The results of such analysis serve as the basis for improving the quality management system in product production and creating competitive goods. Experimental part. During the research, samples of 4 different compositions were obtained on a single-needle 156-needle sock knitting machine of the Chinese company Kejun, model KJ6F606, installed in the “Nam 32 ACADEMIC RESEARCH IN MODERN SCIENCE International scientific-online conference Inno tex Techno” technopark of Namangan State Technical University, and their technological indicators and physical and mechanical properties were studied. Composition of samples Table 1 № Samples 1 100% cotton 2 90% cotton 10% spandex 3 80% cotton 20% spandex 4 80% cotton 10% spandex 10% polyester In the production of samples, 35 tex cotton yarn was used, and the rubber part was made of 110 d rubber, 100 d polyester and 30/75 d spandex yarn. Initially, taking into account the fact that cotton yarn has better air permeability and water absorption properties than artificial and synthetic yarns, we developed socks from 100% cotton, aiming to improve the quality of the socks and have a positive effect on human health. Then, taking into account the shape retention and deformation properties, we developed socks samples in the remaining percentages and tested their physical and mechanical properties at the “Textile Products Testing Laboratory” of Namangan State Technical University. Physical and mechanical characteristics of hosiery products Table 2 Indicators Options Standarts I II III IV Yarn type and linear 100 90% 80% 80% cotton density % cotton cotton 10% cotto 10% 20% spandex n spande spandex 10% x polyester Air permeability 49 40 32 28,5 GOST 12088- V(sm3/sm2∙sec) 7730 -100 Breaking strength R heigh 214 225 192 295 GOST 28554 (N) t width 102 233 93 269 Stretching until heigh 47 100,4 113,6 97,9 GOST 28554 breaking L (%) t 33 ACADEMIC RESEARCH IN MODERN SCIENCE International scientific-online conference width 132,2 181,4 96,6 145,1 Irreversible heigh 14 16 13 15 GOST 28882-90 deformation ε (%) t n width 18 20 17 19 Reversible heigh 86 84 87 85 GOST 28882-90 deformation ε (%) t o width 82 80 83 81 Abrasion resistance I 30 34 36 39 GOST 16486-93 (thousands of revolutions) To determine the quality options of hosiery products, a complex assessment diagram of quality indicators was used. The diagram presents the results of the analysis of the quality of hosiery products in graphical form. The complex diagram graph is constructed as follows: its outer contour indicates that knitted fabrics have a high quality indicator. That is, the closer the contour is to the outside, the higher the quality of the knitted fabrics and the closer they are to the requirements. 34 ACADEMIC RESEARCH IN MODERN SCIENCE International scientific-online conference Figure 1. Comprehensive evaluation diagram of the obtained samples The results obtained from the technological indicators and physical and mechanical properties of knitted fabrics presented in the tables were used to construct diagrams and calculate the area of polygons. Conclusion. On each axis of the complex diagram, numerical indicators of the results of technological indicators and physical and mechanical properties of mixed hosiery products are placed. In this case, their best indicators are drawn on the outer contour: the largest for positive indicators and the smallest for negative indicators. This diagram shows the physical and