Citation: V Kumar, Guluma S , C Prakash. Investigation on Geometric and Dimensional Properties of Cotton Sheath Elastomeric Core Spun Yarn Single Jersey and Popcorn Jersey Fabric Structures. Trends in Textile & Fash Design 2(1)-2018. LTTFD.MS.ID.000129. DOI: 10.32474/ LTTFD.2018.02.000129. 136 UPINE PUBLISHERS Open Access L Latest Trends in Textile and Fashion Designing Research Article Investigation on Geometric and Dimensional Properties of Cotton Sheath Elastomeric Core Spun Yarn Single Jersey and Popcorn Jersey Fabric Structures V Kumar 1 , Guluma Sorsa 1 and C Prakash* 2 1 Department of Textile Engineering, Wolkite University, Wolkite, Ethiopia 2 Department of Fashion Technology, Sona College of Technology, Salem, India Received: April 18, 2018; Published: April 26, 2018 *Corresponding author: C Prakash, Department of Fashion Technology, Sona College of Technology, Salem, India, Email: Introduction In knitting, the yarns are initially formed into loops, and then these loops are interconnected to produce a textile structure. The term inter looping is used to describe this technique of forming fabrics. Based on this principle, a textile fabric is produced by using only one set of yarn. Spencer [1] stated that knitting is one of the fabric forming methods in which the series of yarn loops are intermeshed to produce the fabric. Knitting is formed by a series of loops, intermeshing in rows, and each hanging from the last. Each intermeshed pair of loops is called as a stitch; a vertical column of stitches is a whale and a horizontal row of stitches is a course in a knitted fabric. Chandrasekhar [2] found that the term circular knitting covers all weft knitting machines have needle beds which are arranged in circular cylinders and or dials. Among global fabric production, circular knitting accounts for nearly 15%. Ajgaonkar [3] explained that majority of weft knitted structures are similar in four major structural units of construction, i.e. face knit stitch, back knit stitch, tuck stitch and float or miss stitch. The most studied structure is plain-knit structure with full of knit stitches. It has proved, however, to be a difficult structure to analyse, mainly because of the experimental difficulty of measuring this highly extensible and easily deformable structure and also, it now appears, because its relaxed shape is not as simple to define as first thought. It is not possible to discuss the geometric and other properties of knitted fabrics without describing the elements of a knitted structure. The smallest element of a knitted fabric is the loop. During knitting the loop is extended due to take down force applied to the fabric. The fabric is removed from the knitting machine and left free from strain, and then the loop takes its original form. Doyle4 suggested that the knitted loop and the length of yarn knitted into the stitch in particular, is an important parameter for Abstract The prime purpose of this research work is to study the feasibility and the ease of knitting of cotton sheath - elastomeric core spun hosiery yarn into different fabric structures with the help of a modern multi cam track high speed circular weft knitting machine and comparing their geometric and dimensional properties. By keeping these objectives in mind, cotton sheath - elastomeric core hosiery yarn was spun. The produced spun yarn was knitted into two different fabric structures namely single jersey and popcorn jersey with identical machine parameters. Among these two fabric samples, the former one is a structure knitted with full of knit stitches and the latter one is the derivative structure of the former one and made up of the combination of knit and tucks stitches. Both these structures were subjected to their dry, wet and fully relaxed states and then their geometric properties were studied to understand the changes after each relaxation state and the potential of these structures to attain their dimensional equilibrium state was observed through repeated cycle of washing and drying. The comparison is pretty useful to understand the influence of tuck stitch into the geometric and dimensional characteristics of the popcorn fabric sample developed. Keywords: Cotton Sheath-Elastomeric Core; Spun Hosiery Yarn; Tuck Stitch; Single Jersey; Popcorn Jersey; Loop Length. ISSN: 2637-4595 DOI: 10.32474/LTTFD.2018.02.000129