Comparing double jersey knitted fabrics made of Tencel and modal yarns, spun by different spinning methods

Abstract

A double-bed circular knitting machine with a gauge of E17 and a needle bar diameter of 200 mm (8 in) was used to make three groups of plain weft knitted Tencel fabrics and three groups of modal knitted fabrics. The yarns were spun using three spinning methods: ring, rotor, and air-jet system. Their count was 20 tex. All the knitted fabric samples were manufactured under the same conditions. One-half of each knitted fabric sample remained unfinished, while the other half was finished. Structure parameters of all finished and unfinished knitted fabrics were analyzed, and the most significant parameters were compared. Tensile properties of the knitted fabrics in wale and course directions were measured. The difference in the elasticity of the knitted fabric was analyzed in particular, and the portions of knitted fabric stretch are given. The basic conclusion is that using equal yarn fineness, but different raw material composition and structure, the produced knitted fabrics had substantially different fabric masses per unit area. The raw material composition and construction of the yarn, that is, the yarn manufacturing process and the spinning process produce yarns of different structures and properties that are manifested in the structure and properties of the knitted fabric. Thus, the finishing process must be specific for each raw material composition and yarn structure.

Influence of Aging on the Physical Properties of Knitted Polymeric Materials

“…Figure 8 shows changes in force at break and elongation at break due to aging. The forces at break of the materials were usually higher in the wale direction due to a greater number of loops per unit length, which contribute to greater strength in that direction [49]. The standard deviations for force at break in the wale and course directions were very low, Figure 6.…”

How to Address Flame-Retardant Technology on Cotton Fabrics by Using Functional Inorganic Sol–Gel Precursors and Nanofillers: Flammability Insights, Research Advances, and Sustainability Challenges

“…MMT nanoclay materials are a very soft phyllosilicate mineral belonging to the smectite family with an enlarged 2:1 crystal lattice [216]. The chemical structure of MMT is defined as M x (Al 4−x Mg x )Si 8 O 20 (OH) 4 , where M is a univalent cation and x is an isomorphous substitution degree ranging from 0.5 to 1.3 [217]. It is a kind of smectite silicate, with a 2:1 layered structure about 1 nm thick and several microns in lateral dimensions, consisting of two tetrahedral silica layers (hereafter, T) separated by an octahedral alumina layer (hereafter, O), resulting in T:O:T structural unit [37,216].…”

“…Among others, cotton fabric represents one of the most widely employed natural fibers in the textile industry. Indeed, the average global production of cotton fibers reached about 25 million tonnes during recent years, representing 28% of all fibers' global production [4]. Cotton fiber structure consists of a polysaccharide component of β-d-glucopyranose units linked together by β-1,4 bonds (Figure 1); non-reducing and reducing sugar units stabilize the end terminal of cellulose polymer chains [5].…”

Study of Rib Knits Coursewise Tensile Process

“…Tensile properties of basic weft knitted stitches, such as plain and rib 1×1 stitch, made of cotton yarn and blended cotton yarn with the content of Lycra, are analyzed in paper [15]. Pavlović & Vrljičak [16] considered the mechanical properties of Tensel and modal knitted fabrics. Mechanical properties of knitted fabrics for technical application are studied by Araújo et al in the works [17,18].…”