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Characteristics Of Twisted Yarn

HANGZHOU FENGYI TEXTILE CO.,LTD | Updated: Sep 07, 2017

     Self-twist twist is an important yarn quality index of the spin spinning machine, which refers to the twist number in the half period length of the self twist yarn. The so-called cycle length is the length of the continuous region of the S-Twist region and Z-Twist region formed by the cyclic structure of the S-Twist region and the Z-Twist region after the self twist roller. Self-twist twist is the most important factor to determine the mechanical properties of self twist yarns. The tensile properties of self twist yarns with normal twist are similar to those of ring spun yarns. Therefore, it is one of the most basic process design to choose the proper twist of self twist yarn in the production of spin spinning.Twisted Yarn
      Test of longitudinal section shape of yarn yarns. Twist test. Using YG155 type Digital Twist meter, the St Yarn test half period 13 twist twist, each variety takes l0 a specimen, each sample test S, Z Twist 10 times, calculate average. The length and period length of the twist-free yarn are measured. No twist zone length, each variety takes 10 samples, each specimen is measured l0 times, and the average value is obtained. A cycle length is composed of an S-twist segment and a Z-Twist segment plus 2 non twist segments, each of which is l0 a specimen, and each specimen is measured l0 times, averaging.Twisted Yarn
      Test content. Select 2 Kinds of yarn density (5O, $number Tex), 5 kinds of spinning speed ($number, $number,/) respectively, test the half period twist, the length of the No Twist zone and the change of the cycle length with the spinning speed. Self-twist yarns are twisted by alternating motions and rotations of a pair of self-twisting rollers to twist the yarn back and join the yarn at the confluence of the yarn hook. Since 2 of the Self twist bar from the self Twist Roller output has 2 yarn hook to form a certain phase difference, so the yarn formed by the S-Twist section, Z-Twist segment and no twist section composition. The Twist-free section of this form has a certain twist back, so that the strength of the twisted yarn is higher than that of the twisting yarn produced by the 2-twist structure.Twisted Yarn
      In this paper, the different sections of the phase-spun yarn are analyzed by electron microscope, and the yarn shape is observed in each section, which is compared with the spinning yarn of Tex and the ring yarn. The longitudinal section shape of each section of the self twist yarn is compared with the longitudinal section shape of the single yarn and the strand of the same branch number ring spindles. The results show that the S-Twist section and the Z-Twist section of the yarn are very similar to the longitudinal section and the ring strand strands, but the hairiness of the spun yarns is slightly more superficial. The 2 root strips in the twisting section of the spun yarns are separated, which becomes the most significant area of yarn performance.Twisted Yarn


HANGZHOU FENGYI TEXTILE CO.,LTD

Add:NO.212 YAQIAN ROAD,YAQIAN TOWN,XIAOSHAN,HANGZHOU,CHINA

Contact us:DORIS DING

Tel:+86-571-83717108

Fax:+86-571-83717108

Mob:+8618668232609

E-mail:dorisding81@fypolyester.com