Iris Publishers_Journal of Textile Science & Fashion Technology (JTSFT)

Regression Analysis of the Effects of Yarn Counts, Stitch Lengths on Depth of Stripes of Different Single Jersey Fabrics

Abstract

Fabric can be made attractive by means of ornamentation and designing. Stripe is one means by which attractive fabric can be produced which added extra values of that product. This research was to investigate the effects of yarn counts, Knit structures and Stitch Lengths on the depth of stripes. All the samples were made with 100% cotton dyed yarns. The work was done in three sections. In the first section, using a stitch length 2.8mm, three Single Jersey Plain structures were produced using different yarn counts which were 30 Ne, 28 Ne, and 26 Ne. In the second section, Single Jersey Plain, Single Lacoste, Polo Pique, and Double Lacoste structures were produced with 26 Ne yarn at stitch length 2.8mm. In the final section, four Single Jersey Plain structures were produced by varying stitch length 2.70 mm, 2.80 mm, 2.90 mm and 3.0 mm using the same yarn count which was 30 Ne. After conditioning, Depth of stripes (DOS) were measured, data were presented in tables and graphical representations were shown. It was found that little changes in DOS were observed with decreasing of yarn count in a dry relaxed state but remarkable changes in DOS were observed after washing and wet relaxation. DOS for 30 Ne, 28 Ne, and 26 Ne were found 13.25 mm, 13.5 mm and 14.2 mm respectively. In the second section, the highest depth of stripe was found in Single Jersey Plain structure and lowest in Double Lacoste structure. DOS of other structures lie in between them. Effects of stitch lengths were also studied here. Effects of four different stitch lengths were shown in Single Jersey Plain structures. DOS in a dry relaxed state for 2.70 mm, 2.80 mm, 2.90 mm and 3.00 mm were found 11.1 mm, 13.35 mm, 13.85 mm and 14.30 mm respectively. DOS in the wet relaxed state was reduced in all samples due to shrinkage. Furthermore, attempts were made to conduct linear regression analysis in order to find a suitable formula to predict the change of DOS.

Introduction

The art of knitting has been rapidly progressing day by day. Unlike woven fabrics, knitted fabrics are popular for their shape fitting properties; soften handle, bulker nature and high extension at low tension. The application of knitting was popular by the term hose to produce a complete covering of the legs and since then the word hosiery is conveniently used for a series of articles on stockings, socks, knitted legs coverings, and even to general circular knitted goods [1].

Different types of knitted fabric may be produced by intermeshing different types of loops such as knit, tuck and miss loops. Along with knit loops, tuck loops are used to produce different types of commercial and popular knitted structures. The commercial design of knitted garments is a process that shares many important characteristics with other types of aesthetic design and engineering [2].

Yarn-dyed knit fabric is one of exclusive fabric highly recommended by Buyer. In the knitwear section, the yarn-dyed fabric is very popular and expensive rather than the regular solid fabric. For years, knitting has been considered more an art than a science. Many attempts have been made over the past century quantify the characteristics of knitted fabrics.3 Knit fabrics provide comfortable wear to almost any style of garment. Most of the knitted fabric is used to produce baby wear without restricting movement. While many variations of knit fabrics exist such that used for hosiery, only two types of knit fabric exist-weft and warp knits. From these two types of knit fabrics come various sub-types [11,12]. The key to understanding a knitted structure lies within its basic element, the single knitted loop. The length of yarn knitted into a single loop will determine such overall fabric qualities as hand, comfort, weight, extensibility, finished size, cover factor, and most importantly, fabric dimensional stability [4,10].

In this paper, an attempt was made to develop various feeder stripe single jersey structures on single jersey circular knitting machine and study on the effects of yarn counts, knit structures and stitch lengths on the depth of stripe were observed.

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