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Yarn Formation and Recent Developments
Published in Asis Patnaik, Sweta Patnaik, Fibres to Smart Textiles, 2019
Friction spinning is defined as an ‘open-end’ spinning method, in which the yarn formation takes place in the yarn forming zone consisting of two friction rollers with the aid of frictional forces. Friction spinning system was developed by the company Ernst Fehrer and exhibited in 1973 under the name of DREF-1. With this system, the opened fibres were made to fall on a vacuum slot of a single perforated cylindrical roller, the rotation of which imparted twist to the fibre assembly. Owing to the absence of positive control over the assembly of fibres, much slippage occurred between the fibre assembly and the perforated roller, which reduced the twist efficiency. Hence, this particular design could not be commercialized. The commercial development of two designs of DREF spinning machines is known as DREF-2 and DREF-3, respectively.
Dynamics and morphological evolution of a fiber conveyed in a three-dimensional rotor spinning unit: a numerical study
Published in The Journal of The Textile Institute, 2023
Jingyu Cui, Hailang Xiong, Hao Jia, Yuzhen Jin
Rotor spinning is a type of open-end spinning technology that uses air currents to transport fibers to a rotating rotor where fibers are assembled and drawn out as yarn. Compared to conventional ring spinning, rotor spinning has a higher production rate and is more cost-effective (Altas & Kadoğlu, 2012). However, rotor spinning is limited to manufacturing yarns with coarser to medium counts, and the rotor-spun yarns are usually weaker and have a harsher feel than ring-spun yarns. The reason may be due to that the fibers in the rotor-spun yarn are less straight and parallel compared to that of ring-spun (Kong & Platfoot, 2000; Lawrence & Chen, 1988), which greatly limits its development and application in the textile industry.