Fiber Configuration in Sliver and Roving and its Effect on Yarn Quality

Garde, A.R.; Wakankar, V.A.; Bhaduri, Swayamdipta

doi:10.1177/004051756103101205

Cited by 27 publications

(18 citation statements)

References 7 publications

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“…Fiber hooks in the card slivers were discovered in 1949 [14] by the Manchester School of workers who later showed r 13] that the level of waste extraction at combers is critically dependent on the number and direction of presentation of hooks to the cop1ber. A few years later it was demonstrated [8,16 that the hooks formed at carding are still present in the finisher sliver and rovings and that carded-yarn quality is significantly affected by the number and direction of presentation of hooks to the ring-frame drafting zone. Simpson et al [17), employing the cutting-ratio technique for estimating the incidence of hooks, found that end breakages at spinning are also sensitive to this factor.…”

Section: Introductionmentioning

confidence: 99%

Studies on Hook Formation and Cylinder Loading on the Cotton Card

Ghosh

Bhaduri

1968

Textile Research Journal

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The effect of various carding parameters on hooking and loading characteristics and on yarn quality has been investigated for a California 15/32 -in. cotton.Lickerin speeds and method of doffing the card web were shown to have no effect on the pattern of hook formation which is influenced mainly by cylinder and doffer speeds and the hank of the delivered sliver. These same factors also influence the loading on the cylinder and the coefhcient of transfer of fibers to the doffer. No clear-cut relationship between loading and hooking has, however, emerged. Increased doffer and cylinder speeds, at a constant carding rate, were seen to decrease yarn imperfections..

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Section: Introductionmentioning

confidence: 99%

Studies on Hook Formation and Cylinder Loading on the Cotton Card

Ghosh

Bhaduri

1968

Textile Research Journal

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“…The increase in draft/doublings increases the span lengths in the sliver. This is mainly due to process of enhanced straightening of hooks and improved orientation at relatively higher draft given at drawframe [8,9]. Table 5 shows that the values of 2.5 %, 50% and 66.7 % SL in finisher sliver are slightly higher than the respective values in breaker sliver.…”

Section: Breaker Slivermentioning

confidence: 97%

Study of Effect of Spinning Process Variables on Fibre Length Parameters Using Taguchi Method

Kumar¹,

Ishtiaque²,

Salhotra³

2009

TOTEXTILEJ

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The effect of drafts at different stages of spinning process on fibre length distribution of slivers has been studied by using Taguchi Method and ANOVA technique. The L8 mixed orthogonal array was used to work out eight different slivers. Two different lap hanks, four different card drafts and two different draft/doublings at breaker and finisher were selected for the study. The fibrograph length measurements in terms of 2.5 %, 50 % and 66.7 % span lengths and mean lengths (mean length and upper half mean length) were studied. The 50% span length (SL) and 66.7% SL give an indication of fibre hooks in the sliver. These span lengths in card sliver first decrease and then increase with drafting at breaker and finisher sliver due to removal of hooks.

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“…A similar observation was made when the linear density of the card sliver was increased, keeping a constant cylinder-doffer speed ratio. Garde, Wakandar, and Bhaduri (1961) observed that the most of the fibers in the card slivers were hooked either at one end or at both ends and a large majority of these fibers was hooked at the trailing end. They further found that with successive passage of drawing, the percentage of hooked fibers was reduced and that of fibers without hooks was increased and the reduction of trailing hooks was much greater than the reduction of leading hooks.…”

Section: Introductionmentioning

confidence: 98%

Influence of carding and drawing processes on orientation of fibers in slivers

Das

Ishtiaque

Dixit

2012

Journal of The Textile Institute

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The orientation of fibers is known to play a very important role in determining the quality of the carded and drawn slivers as well as the quality of the ultimate yarns produced from those slivers. Also, the orientation of fibers is considered to be a very useful parameter for evaluating the effectiveness of the carding and drawing processes in aligning the fibers. In addition, the orientation of fibers is known to determine the length utilization of the fibers in the slivers. This article reports on the influence of carding and drawing processes on the orientation of fibers in the carded and drawn slivers. A series of carded and drawn slivers were prepared by using polyester staple fibers and making various changes in the carding and drawing processes and the orientation of fibers in the slivers was evaluated based on Lindsley's methodology in conjunction with a mathematical model of fiber orientation in slivers. It was observed that the increase in cylinder speed and the decrease in doffer speed resulted in more anisotropic fiber orientation distribution in the carded slivers and the degree of anisotropy was found to be more in the forward direction as compared to the backward direction of the carded slivers. The higher draft and doubling in the drawframe resulted in higher anisotropy in the orientation of fibers in the drawn slivers and the drawn slivers displayed more anisotropy in the backward direction as compared to the forward direction. The higher delivery speed of the drawframe resulted in higher anisotropy in fiber orientation in the drawn slivers and the drawn slivers exhibited more anisotropy in the backward direction as compared to the forward direction. The results of fiber orientation in the carded and drawn slivers obtained by using the mathematical model were compared to the fiber orientation parameters suggested by earlier researchers and a satisfactory correlation between them was observed.

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Fiber Configuration in Sliver and Roving and its Effect on Yarn Quality

Cited by 27 publications

References 7 publications

Studies on Hook Formation and Cylinder Loading on the Cotton Card

Studies on Hook Formation and Cylinder Loading on the Cotton Card

Study of Effect of Spinning Process Variables on Fibre Length Parameters Using Taguchi Method

Influence of carding and drawing processes on orientation of fibers in slivers

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