Influence of miss knit repeat on parameters and properties of elasticized knitted fabric

The structural characteristics, dimensional change after four washing cycles, non-creasing properties and air permeability of Swiss double piqué knitted fabrics from cotton/flax (70% cotton, 30% flax), PAN/flax (70% PAN, 30% flax) and 100% flax yarns have been investigated. These knitted fabric samples of varying densities were produced on a 10 -gauge circular knitting machine. The results of investigation showed that the structural characteristics, dimensional change in washing, non-creasing properties and air permeability are highly dependent on the type of yarn used. Besides the type of yarn, the structural characteristics, such as the number of wales W and courses C per centimeter, fabric stitch density S, weight Ws, and fabric tightness K, are also influenced by the average loop length la. The weight Ws and thickness t of knitted fabrics are determined by the diameter of the yarn used. Usually, primary dimensional alterations of knitted fabrics of all yarn types occur after the first and second washing cycles. The non-creasing properties of the examined knitted fabrics are mainly affected by the type of yarn, rather than the average loop length la. Lastly, the air permeability AP of knitted fabrics is affected by the type of yarn, the average loop length la, and fabric density S.

Section: Introductionmentioning

confidence: 99%

Experimental study of structural characteristics, dimensional change in washing, non-creasing properties and air permeability of Swiss double piqué flax knit fabrics

Bukhonka

2023

“…The fabric's weight, density, elasticity, and permeability properties can be adjusted according to demand by making necessary changes in the placement of the elastomer threads. 15 Extensibility and elasticity are the most important characteristics of fabrics through which orthopedic supports are able to exert continuous pressure on the human body. Özdil 16 noted that as the elastane content increases, the stretching and the maximum stretching percentages of fabric increase owing to the high elasticity of elastane.…”

Section: Introductionmentioning

confidence: 99%

The effect of weft yarn type and elastomer yarn threading on the properties of elastic warp knitted fabrics. Part 1: Structure and elasticity

Kyzymchuk

Melnyk

Marmaralı

et al. 2023

The demand for medical textile products is increasing with awareness regarding better healthcare services and efficient medical treatments. Compared to other textiles, elastic warp knitted materials, which have elastomer threads in each wale have been widely used in producing medical and preventive products. Thus, in order to decrease the weight and cost of these products without effect on fabric’s stretchability, in this study, various elastic warp knitted fabrics were produced using different raw materials and elastomer threading arrangements, and their properties were investigated. The fabrics were produced on a crochet knitting machine with five different arrangements of elastomer threading and four different laid-in yarn materials as polyester, cotton, and linen. Then the dimensional properties and elastic behaviors of the samples were determined and evaluated comparatively. Statistical analysis showed that all studied elastic warp knitted fabrics have high provide elasticity at a higher than 95% level. On the other hand, the mass per unit area of the fabric is reduced, with the use of linen yarn as weft yarn, or when the total linear density of the weft yarn and the amount of elastomer threads decrease. Finally, the obtained results revealed the possibility to reduce elastomer consumption to decrease weight for elastic medical products, which were developed, without effect on fabric’s stretchability and elasticity as well as replacing synthetic threads with natural yarns in order to improve product comfort.

“…An increase in fabric density and elastomer yarn ratio results in higher elasticity, compressibility and better fit. 13 On the other hand, thermal and permeability characteristics are negatively affected. 14 Therefore, an optimum balance should be provided.…”

Section: Introductionmentioning

confidence: 99%

The effect of weft yarn type and elastomer yarn threading on the properties of elastic warp knitted fabrics. Part II: Thermal comfort properties

Kyzymchuk

Marmaralı

Melnyk

et al. 2023

The aim of this study is to determine the performance properties of elastic warp-knitted fabrics used for medical purposes. The samples were knitted using different weft yarn material and changing the threading order of elastomer yarn. The detailed results of the dimensional and elasticity performance of elastic warp-knitted fabrics had been reported in Part I of this series. In this part, the effects of weft yarn material and the threading order of elastomer yarn on the thermal comfort characteristics were investigated. It has been seen that the type and linear density of the transverse weft yarns and the number of elastomer yarns in the fabric structure affected significantly the thermal comfort and permeability characteristics of the developed elastic warp-knitted fabrics. According to the results, using polyester yarns as weft and reducing the number of elastomer yarns led to an increase in air permeability. Additionally, the thermal conductivity characteristics of the fabrics increased as the number of elastomer yarns in the structure increased. It has been seen that from the results, the water vapour resistance coefficient of the samples is appropriate for the usage of these fabrics in medical products.