Influence of tuck stitches on the physical and mechanical properties of knitted fabrics

Abstract

This article discusses ways to develop combined knitwear based on elastic weave. The purpose of the dissertation work is to improve the technology for the production of knitted fabrics with reduced material consumption, which will provide and satisfy the demand of the population with high-quality knitted products that have high performance, hygienic and consumer properties. As a result of the experimental work, the technological capabilities of the modern LIBRA 3.130 flat knitting machine were studied and new types of combined knitwear based on elastic interlock weave were obtained. Regularities of the influence of elements of the structure of knitwear on the parameters and physical and mechanical properties of the fabric of knitwear are established. Comparing the volumetric density of the combined knitwear of different structures, one can be convinced that the presence of rows of satin stitch and a derivative surface in the structure of elastic knitwear not only reduces extensibility and increases dimensional stability, but in some cases reduces the bulk density of knitwear. It has been established that the air permeability coefficients can be reduced to 40% (168.6 - 236.6 cm3/cm2∙sec) for combined knitwear by reducing the length of the thread in the loop. It has been established that a decrease in the surface density of combined knitwear based on elastic and interlock weave can also be achieved by skipping stitches, since this reduces the length of the thread spent on the formation of one loop row. On the basis of a comprehensive comparison, optimal options for new models of knitwear structures with improved physical, mechanical and consumer properties are proposed. Regression equations are derived to determine the dependence of the bulk density of the knitted fabric and the air permeability index on technological factors. The results of the study make it possible to expand the range of knitted products, re-duce the consumption of raw materials per unit of production, as well as improve the quality and consumer proper-ties of the range produced, choose high-quality samples and technologies for their production.