American Journal of Applied Scientific Research 2016; 2(6): 33-37 http://www.sciencepublishinggroup.com/j/ajasr doi: 10.11648/j.ajasr.20160206.11 ISSN: 2471-9722 (Print); ISSN: 2471-9730 (Online) Effect of Stitch Lengths and Yarn Counts on Areal Density and Drape Behaviour of Different Weft Knitted Single Jersey Structures Emdadul Haque 1 , Md Shamim Alam 2, * 1 Department of Textile Engineering, Ahsanullah University of Science and Technology, Dhaka, Bangladesh 2 Department of Textile Engineering, South East University, Dhaka, Bangladesh Email address: emdad.haque@aust.edu (E. Haque), shamim100486@gmail.com (Md S. Alam) * Corresponding author To cite this article: Emdadul Haque, Md Shamim Alam. Effect of Stitch Lengths and Yarn Counts on Areal Density and Drape Behaviour of Different Weft Knitted Single Jersey Structures. American Journal of Applied Scientific Research. Vol. 2, No. 6, 2016, pp. 33-37. doi: 10.11648/j.ajasr.20160206.11 Received: June 24, 2016; Accepted: October 20, 2016; Published: November 21, 2016 Abstract: This paper aimed at analysis on the effects of stitch length and Yarn Count on GSM and drape behavior of weft knitted single jersey fabrics. In this research work different types of weft knitted single jersey fabrics have been used like as single jersey plain, single lacoste, double lacoste and polo pique fabric. As drape is one of the most important properties of textile materials so drape ability of a fabric should measure. Here drape ability of a fabric was determined using the instrument Cusick drape tester and is expresses in terms of drape co-efficient. It was found after completing the work GSM increases gradually with the decrease of stitch length. Double lacoste has highest GSM and single Jersey Plain has lowest GSM. GSM increases gradually in coarser yarn. Drape co-efficient decreases gradually with the increase of stitch length. Double lacoste has highest drape co-efficient and polo pique has lowest drape co-efficient. Drape co-efficient decreases gradually in finer yarn. Keywords: Drape Co-efficient, Knitted Fabric, Yarn Count, GSM, Stitch 1. Introduction Knitted fabric consists of loops, which intermeshed each other. Loops can have different appearance, according to shape of yarn path. Thus, different structural elements exist in the knitted fabric [1]. Knitting is frequently used method for fabric production. Knitted fabric is unique in structure that it possesses a high order of elasticity and recovery. In other word, unlike woven or bonded fabrics which possess a low degree of elongation, knitted fabric can be stretched to considerable length and will gradually return to its original shape. Knit fabrics provide comfortable wear to almost any style of garment [2]. The dimensional stability of knit fabrics is an important area of the knitting industry. Stitch length, yarn count, structure of fabric influence the dimensional stability of fabric [3]. These various factors influence the dimensional stability as well as the bending length and drape co-efficient of the knitted fabrics. Dimensional changes occur during production or washing or wearing. Drape is the ability of a fabric to assume a graceful appearance in use. It is an important property to textiles materials which allows fabric to orient itself into graceful folds or pleats as a result of force of gravity. A fabric is said to possess a good drape ability when its configuration is pleasant to eye [4]. A circular specimen of diameter 30 cm is supported on a circular disc of diameter 18 cm. When doing so the unsupported area of the fabric drapes over edge of the supporting disc. If the specimen is an object say a card board draping would not occur and hence the area of projection from the periphery would equal to the area of the solid object [5]. When the fabric is supported, it will assume the folded configuration due to gravity and the shape of the projected area will not be circular [6]. This study has been carried out to investigate the Effect of stitch length and yarn count on areal density and drape behavior of different weft knitted single jersey structures.