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Abstract In this study, the properties of ring, rotor, and vortex spun yarns produced in different counts from cotton, viscose rayon, and 50/50 cotton-modal blended fibers were investigated. Yarn samples were converted into knitted fabrics in a single jersey circular knitting machine and dyed with reactive dyestuff to determine the physical performances of the yarns in knitted form. The results revealed that vortex spun yarns have lower hairiness and better pilling resistance over ring and open-end rotor spun yarns. Furthermore, viscose rayon yielded more satisfactory results in the vortex spinning system in terms of yarn strength, particularly in coarser yarn counts and hairiness.
Key words vortex spinning, ring, rotor, yarn properties, knitted fabrics, viscose rayon
First introduced at OTEMAS'97 by Murata Machinery Limited as a development in air jet spinning technology, the MVS (Murata Vortex Spinner) system stands out with its high production speed, ring-like yarn structure, capability of spinning 100% carded cotton yarn, and overcoming fiber type limitations. Vortex yarn and fabrics are claimed to have several unique properties offering advantages over conventional yarn spinning technologies, including low hairiness, outstanding pilling and abrasion resistance, high moisture absorption and diffusion properties, quick drying characteristics, and better durability enabling high functionality over a long period [I].
Each spinning system produces yarns with different structures. Fibers in ring spun yarns are arranged in a helix and the resultant yarn has a uniform fiber core. During formation of open-end rotor spun yarns, core fibers forming the interior part of the yarn become twisted. However, some of the fibers are wrapped around already spun yarn, which forms the identifiable feature of open-end rotor spun yarns [2]. In vortex spun yarns, core fibers are also encircled by wrapper fibers. However, unlike open-end rotor spun yarns, the core fibers are arranged parallel to the yarn axis without twisting and are enclosed periodically by the wrapper fibers [3, 4]. Therefore, physical and mechanical properties of yarns primarily vary on the basis of the different arrangement of fibers in each spinning technology.
The structure and performance of vortex spun yarns have already been investigated. Basal and Oxenham examined the effects of nozzle angle, nozzle pressure, spindle diameter, yarn delivery speed, and the distance between the front roller and the spindle on the...