The Effect of Machine Setting On Weft- Knitted Fabric Properties

Abstract

N the field of garments manufacture produced from circular weft …. knitted fabrics, it is important that we understand the variables and processes used so that we can predict their impact on dimensional changes. This helps in solving technical problems and satisfying consumer needs. The present investigation was carried out using circular knitting machine gauge 24. It identified the effect of changing various settings of the machine on the characteristics of the knitted fabric produced. Three fabrics were used from combed cotton yarns with count 20/1, 24/1and 30/1 Ne to produce (parasula) single jersey. A regression analysis equation was used to predict fabric specifications. The scheme of research depended on producing three knitted fabric samples from every count with different cylinder diameter opening. Therefore, nine samples were used to investigate the change that happened to the fabric after relaxation, such as: fabric width, f a b r i c weight, stitch density at in wall and course directions, and stitch length. The second stage of investigation was after dyeing and drying all the samples, which were produced under the same condition to identify the extent of the change in their specifications. The final Finishing stage set the fabric width at four different measurements for all samples to study the effect of drying heat on the weight/m 2 , stitch density wall/course, stitch length and shrinkage in wall and course directions. Keywords: Weft knitted fabric, Drying heat, Various settings of the machine, Yarn count, Wall and course density, Stitch length, Fabric shrinkage, Feeding rate. It is a well-known fact that the use of weft knitted fabrics for garment manufacturing is increasing, as the knitted goods offer several advantages that are very suitable for apparel. Advantages  From the user side: quick response to market requirements by offering controllable stretch through the construction, easy care, good body fitting, soft handle, and cooling or warming depending on construction.  From the Manufacturing side: higher productivity (3 times higher than weaving looms), manufacturing costs for knitted goods are approx 50% lower than for woven fabric, lower capital investments, suitable for all types of fibers, and sizing/desizing operations are not necessary.