Fiber packing density in the cross-section of low torque ring spun yarn

Guo, Ying; Tao, Xiaoming

doi:10.1177/0040517516677225

Cited by 10 publications

(11 citation statements)

References 15 publications

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“…This is why a false twisting device was added to impart false twist in the spinning triangle zone, that is, in the weakest point of the yarn path located immediately after the front rollers of the drafting system, to increase process stability and yarn quality. [71][72][73][74][75][76][77][78][79][80][81][82][83] Yilmaz has studied the characteristic properties of the yarn by integrating a false twisting device comprised of air nozzles between the drafting system and yarn guide to reduce the yarn hairiness up to an angular spindle speed of 10,000 rpm in the conventional ring spinning process (Figure 20). 71 The objective of integrating the pre-twisting device was to bind the projected fibers onto the yarn body by the swirling airflow in the nozzle.…”

Section: Multi-balloon (Or Spinhole) Technologymentioning

confidence: 99%

A critical review on recent developments and solutions in the high-speed ring spinning process

Abdkader,

Hossain

2023

Textile Research Journal

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Twist plays an important role in textile technology, particularly in the production of staple yarn structures. Due to the higher yarn quality and flexibility of the process, most short staple fiber yarns are produced in the ring spinning process in comparison to other high-speed spinning processes, such as rotor or air jet spinning. To impart twist in the yarn, the ring/traveler system, rotor and air jet nozzle are used in the ring, rotor and air jet spinning processes respectively. However, the productivity of the ring spinning process is limited significantly due to the frictional heat generated between the ring and traveler, especially at higher angular spindle speeds, which is crucial for the spinning of man-made fibers. This paper aims to describe the recent developments and solutions for increasing productivity in the ring spinning process in a systemic way. To reduce the friction, different topologies and surface modifications in the ring/traveler system were made to increase the angular spindle speed of maximum 23,000 rpm. To eliminate the friction, the twisting element was made of an air bearing or magnetically elevated rings were developed by replacing the ring/traveler system completely, thus permitting a higher angular spindle speed of up to 50,000 rpm. Further approaches deal with cap, loop and nova spinning or Nu-Torque technology to reduce yarn tension or residual torque in the yarn, respectively. The results of the presented work reveal the potential of different developments, especially in the field of twisting system, so that the productivity of ring spinning can be increased drastically.

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Section: Multi-balloon (Or Spinhole) Technologymentioning

confidence: 99%

A critical review on recent developments and solutions in the high-speed ring spinning process

Abdkader,

Hossain

2023

Textile Research Journal

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“…Nu-torque spinning technology, state-of-the-art spinning technology, has been widely used throughout the country. On the one hand, it was not solely reducing yarn hairiness and residual torque, but improved yarn strength and achieved low twist and high strength (Guo and Tao, 2018;Chu et al, 2021). On the other hand, fiber splitting phenomenon was clearly observed in the spinning triangle during the spinning process.…”

Section: Introductionmentioning

confidence: 98%

A spinning method for low-torsion composite yarn with basalt fibers and staple cotton fibers

Peng

Zhang

et al. 2023

Front. Mater.

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Basalt fibers play an indispensable role in aerospace as well as fireproof suits in specialty fields. However, basalt fibers usually have properties such as high temperature and corrosion resistance, severely lack comfort, and are prone to brittle fracture or splitting when subjected to bending or impact forces because of their high modulus. Although considerable efforts have been made to solve the above problems by wrapping soft staple fibers with basalt, but the problem of difficult stress balance exists in the composite process. Herein, we demonstrate that a stress balance spinning method to control the composite conformation between high stiffness basalt fibers and soft cotton fibers, possess significant modulus differences, for high spinnability and comfort composite yarns production on ring spinning. Geometric analysis demonstrated that the stress during retwisting adjusts the internal structure of the basalt fiber and changes the arrangement of exposed cotton fiber bundles, causing the fiber motion track to change from concentric helix to deformed non-concentric helix. The mechanical aspects show that over-twisted composite yarns lead to fiber exposure as well as detachment due to irregular fiber twisting, while low-twisted composite yarns can overcome residual torque and modulus differences. Afterwards, a systematic comparison of composite yarns with different parameters reveals that low-twisted composite yarns have a better helicoid structure, strength and uniformity than raw and over-twisted composite yarns.

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“…However, the wrapped fiber ends will reappear because of the friction effect of mechanical parts in the latter process, and it will generate a mass of reborn hairiness due to the mutual connection between fibers and mechanical parts. 8,9 Low torque spinning introduced by Tao and colleagues 10,11 is another novel spinning technology which is achieved by installing a false twisting device. This device can change the fiber configuration and distribution in single yarn.…”

Section: Introductionmentioning

confidence: 99%

An adhesive-aided ring spinning for improving cotton yarn quality with the aid of sodium carboxymethyl cellulose solution

Guo

Sun

et al. 2020

Journal of Engineered Fibers and Fabrics

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An adhesive-aided ring spinning was developed to improve cotton yarn quality through the wetting and adhesion effect of an adhesive solution, namely, sodium carboxymethyl cellulose solution on fibrous strand in yarn formation zone during spinning process. The spinning mechanism of the adhesive-aided ring spinning with sodium carboxymethyl cellulose solution was analyzed, and the effects of two factors, that is, speed ratio (the ratio of the linear surface velocity to the output speed) and sodium carboxymethyl cellulose concentration, on the yarn performance are investigated. The experiment results reveal that the adhesive-aided ring spinning with sodium carboxymethyl cellulose concentration of 0.7% can significantly reduce yarn hairiness indicated by the hairiness S3 value reducing to 69% and still showing a prominent reduction (65%) after winding process. It has been found that a slightly faster linear surface velocity of the cylinder of the adhesive-aided ring spinning compared with the output speed of the yarn is more beneficial to the reduction of yarn hairiness S1+2 value. Meanwhile, the higher sodium carboxymethyl cellulose concentration also contributes to a higher breaking strength (increasing from 18.24 to 21.12 cN/tex) and lower breaking elongation (reducing from 4.98% to 4.08%). The abrasion resistance of adhesive-aided ring spun yarns also shows an obvious improvement of 12.8%. Therefore, the newly developed adhesive-aided ring spinning with the sodium carboxymethyl cellulose solution provides an effective method to enhance the quality of cotton yarns.

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Fiber packing density in the cross-section of low torque ring spun yarn

Cited by 10 publications

References 15 publications

A critical review on recent developments and solutions in the high-speed ring spinning process

A critical review on recent developments and solutions in the high-speed ring spinning process

A spinning method for low-torsion composite yarn with basalt fibers and staple cotton fibers

An adhesive-aided ring spinning for improving cotton yarn quality with the aid of sodium carboxymethyl cellulose solution

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