22-09-2016, 11:58 AM
STUDY ON PHYSICAL AND MECHANICAL PROPERTIES OF YARNS PRODUCED FROM BAMBOO/MICROMODAL BLENDED AIR VORTEX YARNS
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Abstract
This research work aims towards developing apparels from air vortex yarns using bamboo and micro modal fibres. Five different blend ratios of bamboo and micro modal fibres in the ratio of 100% bamboo, 100% of micro modal, 50: 50 bamboo and micro modal, 70:30 bamboo and micro modal, 30:70 bamboo and micro modal will be used to make 40s Ne air vortex yarn. Using the Muratec air vortex spinning machine. The yarns produced from five different blend ratios were evaluated for Evenness, Hairiness and Imperfections using Uster Tester 5 S 400 and Yarn strength and elongation using Universal Instron Tensile Tester. Results observed indicate the yarn spun from 70% Micro modal and 30% bamboo was superior to other blends used in the experiment. Hence it is recommended to fabric manufacturers for making garments using this blend ratio as it has better quality. Results obtained were also being analyzed statistically and reported.
Introduction
The new spinning Technologies such as rotor, air jet and friction spinning have tremendous potential for higher productivity. However at present these technologies not only suffer from the problem of imparting some undesirable properties to the fabric but also have limited applicability due to the restricted choice of fibres and counts which can be successfully spun on them. Ring-spinning system, though having lower productivity, does not have these drawbacks. This system, therefore, with the incorporation of some recent improvements is likely to occupy the centre stage for the next few years. (K.R. Salhotra 1992)1
The air jet spinning would also have to come with viable solutions to the twin problems of harsh fabric feel and spinning of poor quality 100% cotton yarns. The fact that more than 200 million ring spindles already exist in the textile mills is another factor in favour of ring spinning as far as the next 7-10 years are concerned. Comparatively good knitting performances have shown by the Ring and Air vortex yarns.MVS yarns made fabrics have good abrasion resistance. Good and equal depth of dye shade was found with Ring and Air vortex yarn made knitted fabrics. Ring spun fabric and vortex spun yarn fabric have similar depth of dye shade (Rameshkumar, Anandkumar, Senthilnathan, Jeevitha, Anbumani, 2008)2
As a result of the higher number of wrapper fibres and a decrease in unwrapped sections, vortex-spun yarns have significantly better tensile properties, better evenness and lower hairiness than jet-spun yarns. The low yarn hairiness is the most outstanding feature of vortex-spun yarns. (Nazan erdumlu, Bulent ozipek, and William oxenham 2012).3
The fabric woven with mjs yarn shows higher absorbency compared to the ring spun yarn fabric. Comfort analyses provide opportunity for engineering of textile substrates for various applications. (Tyagi 2010).4
Invariably mjs yarn fabric display higher absorbency and higher air and water vapour permeability’s than the ring spun yarn fabric. (Tyagi 2008).5
MVS spinning technology is favorable for cotton spinning and produces a yarn with more ring-like appearance compared to MJS spinning technology. However, more in-depth study is required to understand the structure of vortex yarns. (W.Oxenham 2003)6
By comparison the new MVS system has a productivity of 400 meters per minute and can produce fine yarns of high quality similar to that of a ring spun yarn. So this new spinning technology is creating a lot of interest. (Dr Geoff Naylor 2002).7
The results demonstrate that air-vortex spun yarn has no any obvious weakness when the fastness properties are compared with ring spun yarn. Therefore, air-vortex spun yarn may be the alternative of ring spun yarn if the production cost, fastness and colorimetric properties are taken into consideration. (Ali kirecci 2011)8