Abstract
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.
Highlights
The human body tries to maintain a constant core temperature of about 37°C and a rise or fall of ±5°C can be fatal
Single jersey knitted fabrics (SJKF) are used for under- and outer-wear compared to woven fabrics because of their high extensibility [4]
The results showed that both the thermal conductivity and resistance of all the selected fabric samples increased with the increase of fabric density, and the fabric temperature variation decreased with increase of fabric thickness [15]
Summary
The human body tries to maintain a constant core temperature of about 37°C and a rise or fall of ±5°C can be fatal. The elastic interlock samples had higher dimensional constants compared to 100% cotton samples, and core cotton/spandex yarns increased tightness factors during relaxation states [8]. Results showed that for the full plaited (fp) and half plaited (hp) plaited fabrics, the stitch density, fabric thickness, and weight increased, while air permeability, the initial elasticity modulus, and the breaking load and extension decreased considerably compared to 100% cotton knitted fabric [4]. The physical, strength, and thermal comfort characteristics of the interlock knitted fabric by cotton and elastane yarns (full and half plaited) were investigated and compared to 100% cotton fabrics. The fabric weight, thickness, bursting strength, puncture resistance, and thermal absorptivity increased while the air permeability decreased and the fabrics knitted using elastane yarns presented higher thermal conductivity [16]. This paper aims to estimate the effect of loop length and Lwp on the geometrical and thermo-physiological comfort of elastic plain knitted fabric
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