engleski

Surface friction of rotor yarn spun by different fibre type

In view of the yarn quantity distributed by spinning technology, although ring yarn always significantly lead the market (54%), it is followed by rotor yarn lately (36%). One of the reason is that rotor yarn are cheaper since process has less technological phases, considering ring spinning process. Beside the yarn structure, the type of fibre determines the properties of the spun yarn intended for the production of textile fabric. In addition to the fibre parameters, fibre fineness and length, the type of fibres from which the yarn is spun, will have an impact on the yarn friction property. This study presents the results of yarn-to-metal friction measurements conducted on rotor spun yarns made of viscose, modal, micro modal and tencel fibres. Bright staple viscose, tencel and modal fibres of 1.3 dtex fineness and 38 mm length as well as 1 dtex and 39 mm length micro modal fibres were spun to produce single spun yarns fineness of 20 tex. The friction property of the yarn is significant. In the production process of textile fabrics, the yarns are subjected to friction on the metal. More precisely, yarn is subject to the surface friction on different metal parts of the machines in order to produce textile fabrics for different application. If the yarn has a high coefficient of friction, breakage of yarns can occur often which slows down production and reduces the quality of the textile fabrics. Yarn-to-metal friction, using a classical friction measurement principle by Friction Tester, was mesaured. Hairiness were determined on an Uster Tester 4-S. The coefficients of friction of rotor yarn spun by cellulose fibers range from 0.23 up to 0.27. The lowest coefficient of friction have viscose rotor yarn, wile the highest is visible for tencel rotor yarn. Since the yarns are made on the same rotor spinning machine, from fibers with the same parameters and yarns of equal fineness it can be assumed that torsional and flexural rigidities of used fibers significantly affects the yarn hairiness, respectively the rotor yarn coefficient of friction.

Rotor spun yarn, Viscose, Modal, Micro modal, Tencel, Surface friction coefficient

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