Effect of Lycra Weight Percent and Loop Length on Thermo-physiological Properties of Elastic Single Jersey Knitted Fabric

Abstract

The aim of this work is to estimate the effect of loop length and Lycra weight percent (Lwp) on the geometrical and thermo-physiological comfort of elastic plain knitted fabric. Fifty single jersey knitted fabric samples were produced at five levels of Lycra weight percent (Lwp) (4%, 5%, 6%, 7%, and 8%) and loop length (2.7 mm, 2.9 mm, 3.1 mm, 3.3 mm, and 3.4 mm) with full plaited (fp) and half plaited (hp) of bare Lycra. The thermo-physiological comfort properties (thermal conductivity, absorptivity, and water vapor permeability), air permeability, and geometrical properties were measured at standard of each one. The results showed that the elastic single jersey knitted fabric thickness ranged between 3.12 times and 4.2 times of the yarn diameter (d). The fabric thickness increased when loop length is increased and decreased when Lwp is increased. The thermal conductivity, absorptivity, and water vapor resistance (WVR) decreased with Lwp increasing.

Engineering UPF and comfort parameters of knitted fabrics and validation using statistical techniques

“…Knitted fabrics are porous structures and are cosier in view of elevated permeability and breathability. On this account, knitted fabrics befit fashionable and marketable for summer wear (Chidambaram et al , 2011). Fabric cover shows the percentage of covered area by the yarns.…”

Thermal comfort properties of bi-layer knitted fabrics made up of polyester yarns and nylon yarns with varied specification

“…Furthermore, increasing yarn count or yarn twist also improved the thermal transfer capacity of cotton knitted fabrics (Oezdil et al ., 2007). The loop length and yarn linear density (Chidambaram et al ., 2011), also the thickness and porosity of fabric (Erdumlu and Saricam, 2017) affected the thermal comfort properties of fabrics. To improve the thermal and moisture transfer properties, researchers developed blend fabrics with different yarns or fibers, such as cotton-rich/polylactic acid fiber (Guruprasad et al ., 2015), modal/polypropylene, modal/polyester (Jhanji et al ., 2015), viloft/cotton and viloft/polyester (Demiryurek and Uysalturk, 2013) blend knitted fabrics.…”

Dimensional Stability, Aesthetic and Functional Properties of Cotton:Polyester Blended Knitted Fabrics with Different Structures

“…Different patterns and various types of fabrics can be knitted on numerous of knitting machines with different sitting, different yarn linear densities and materials. These knitted fabrics are significantly by their structures and finishing methods [2] Different research works have been conducted regarding the impact of finishing methods, yarn and constructional parameters on the physical characteristics of woven ad knitted fabrics [3][4][5][6][7][8][9][10][11][12]. Murugesh and selvadass investigated the influence of different wet processing methods, namely scouring, dyeing, mercerization and softening processes on knitted fabrics properties [3].…”

“…In another study [1] it was found that increasing the stitch length reduced knitted fabric shrinkage and bursting strength; while increased spirality of single jersey fabrics. It was also found that fabric width, thiskness and abrasion resistance were all diminished with increasing stitch length [4]. In his study, to invistigate the impact of the content of micro fiber on the knitted fabric properties, Ramakrishnan and co-authors [5] found that fabrics knitted from micro denier fibers have a superior properties compared to their counterparts knitted from normal denier fibers in relation to drapeability, spirality and moisture vapor transmission properties.…”

“…They stated that yarn type and fiber content have a significant impact on lengthwise and widthwise shrinkage of the knitted fabrics. Although there are numerous researches deal with the influence of woven and knitted fabric parameters on their aesthetic and physical properties [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], there are a shortage in studying the aesthetic and functional characteristics of knitted blended fabrics in terms of blending ratio and loop length. Therefore, this study aimed at investigating the dimensional stability, aesthetic and physical characteristics of fabrics knitted from polyester and cotton fibers with different blending ratios and different structures.…”