19—self-Twist Spinning: Prototype Development

Allen, L. A.; Henshaw, D. E.

doi:10.1080/00405007008629986

Cited by 14 publications

(2 citation statements)

References 3 publications

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“…Henshaw [5] investigated the factors that affect the distribution of strand twist and ply twist for in-phase self-twist yarns, and a conclusion was drawn that the strand tension and strand twist were the main factors influencing the twist distribution in a self-twist yarn. Allen [6] presented the relation between the pressure of selftwist rollers and the twists of self-twist yarns and the effect of the surface coating material of self-twist rollers on the twists of self-twist yarns. Henshaw [7] built up a mathematical model of the yarn structure and relationships between the twist of self-twist yarn and that of each strand.…”

Section: Doi: 105604/123036661172085 N Introductionmentioning

confidence: 99%

Characterization of the Twist Distribution Function and Twist Unevenness of Self-twist Yarns

Cui

Wang

Li-bin

2016

F&TinEE

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In in-phase self-twist yarn there exists an obviously weak twist area between the twisted and no twisted zones. Therefore, during the self-twist spinning process, different distances from the two strands to the convergence point is adopted to produce a certain phase difference to improve the yarn strength. There are two methods used for calculating the twist distribution function of self-twist yarn: 1. using the difference in distance c, and 2. using the twist distribution function of strands A and B, respectively. Then the average twist over a half cycle length is calculated by the twist distribution functions from the two methods mentioned above. Comparing the calculation value from the two methods with actual test twists for the half cycle length, the result shows that the calculation value from method 2 is closer to the values measured, namely the twist distribution function derived from that of strands A and B, respectively. The twist unevenness of self-twist yarn is calculated by the twist distribution function from method 2. The twist unevenness of yarn 1 is the highest. That of yarns 2 and 3 decreases in turn. From the test data of 49×2 tex and 113×2 tex selftwist yarns, in-phase self-twist yarn 1, with maximum twist unevenness, has the minimum tenacity and maximum unevenness of tenacity, and in the same way phased self-twist yarn 3, with the minimum twist unevenness, has the maximum tenacity and minimum unevenness of tenacity.

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Section: Doi: 105604/123036661172085 N Introductionmentioning

confidence: 99%

Characterization of the Twist Distribution Function and Twist Unevenness of Self-twist Yarns

Cui

Wang

Li-bin

2016

F&TinEE

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“…However, little research was carried out on the study of the effect of spinning speed at a self-twist spinning system on yarn quality. Only Allen and Henshaw [6] analyzed some parameters, among which self-twist per half cycle length decreased with the increase of spinning speed, which affects self-twisting producing efficiency. In the study of self-twist spinning, Henshaw [7][8][9] revealed self-twist yarn is a two-ply structure in which both the strand and plying twists alternate S and Z along the yarn and studied a mechanical model for self-twist yarn.…”

Section: Introductionmentioning

confidence: 99%

Influence of Spinning Speed at Self-Twist Spinning System on Yarn Quality

Cui

2011

AMR

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The effect of spinning speed on yarn quality at self-twist spinning system was investigated. The yarns were assessed for different characteristics using objective tests. The results show that yarn hairiness of self-twist yarn increases with the increase of spinning speed and yarn tenacity and extension decrease with increment of spinning speed. The results also show that yarn irregularity, yarn imperfections and yarn twist level have no obvious changes with the increasing in spinning speed. Furthermore, the longitudinal and cross-sectional shape of self-twist yarn were observed and the pictures show that S-twist and Z-twist zone have almost the same structure as the two-plied yarn at ring spinning system and no twist zone has an approximately 45mm length which can influence the strength of the self-twist yarn.

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Repco Self-Twist Spinning

Oxtoby

1987

Spun Yarn Technology

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19—self-Twist Spinning: Prototype Development

Cited by 14 publications

References 3 publications

Characterization of the Twist Distribution Function and Twist Unevenness of Self-twist Yarns

Characterization of the Twist Distribution Function and Twist Unevenness of Self-twist Yarns

Influence of Spinning Speed at Self-Twist Spinning System on Yarn Quality

Repco Self-Twist Spinning

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