The Effect of Drawing-Frame Variables on Cotton Fiber Hooks and Parallelization and Processing Performance

Simpson, Jack; Sands, Jack E.; Fiori, Louis A.

doi:10.1177/004051757004000107

Cited by 20 publications

(4 citation statements)

References 9 publications

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“…In drawing process, the clumped fiber is removed preferentially followed by the both ends hook or the trailing hook, and the leading hook is the most difficult to remove (Garde et al ., 1961; Shen et al ., 2019). Sliver weight, draft ratio and draft distribution have significant effects on fiber straightness (Simpson et al ., 1970). Fiber straightness rather than hook type affects the sliver limit irregularity more (Yang et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Study of hooked fiber in cotton yarn based on tracer fiber method

Chu,

Gao,

Zhang

et al. 2024

IJCST

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PurposeThrough the tracer fiber method, we strive to more accurately obtain the hook degree, straightening degree, percentage and other characteristic indexes. In order to intuitively represent the hook state from sliver to yarn, and feed back production information in combination with quality test.Design/methodology/approachTaking the cotton fiber as an example, the hooked fibers were studied by using the tracer fiber method. Tracer fibers were made from cotton-type viscose fibers. Tracer fibers and combed cotton fibers were uniformly mixed for many times and used to produce the card sliver, semi-drawn sliver, drawn sliver, roving and yarn. With the help of ZF-20D ultraviolet analyzer, geometric parameters of hooked fibers were measured, and characterization indexes were calculated. And hook indexes and quality indexes were compared.FindingsBy redefining and reclassifying hooked fibers, the change of hooked fibers in the process was tracked and characterized carefully. Some hooks in card sliver are straightened but not eliminated, and will form longer zero-angled hooks in the subsequent process. The straightening degree and number of zero-angled hooks affect the evenness CV mainly.Originality/valueThe characterization of hooked fibers is important for reducing hooked fibers and spinning high quality yarns. There is no uniform standard for the characterization of hooked fibers at present. Most studies are about relationship between process and hook in carding and drawing. There is no research on hooked fibers in the whole spinning process. In the paper, hooked fibers were redefined and reclassified, the change of hooked fibers in the process was tracked and characterized carefully.

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Section: Introductionmentioning

confidence: 99%

Study of hooked fiber in cotton yarn based on tracer fiber method

Chu,

Gao,

Zhang

et al. 2024

IJCST

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“…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. Simpson, Sands, and Flori (1970) found that the linear density of the drawn sliver and the total draft and doubling in the drawframe played very decisive roles in determining fiber parallelization, fiber hooks, and processing performance of the drawn sliver. They observed that the frequency of fiber hook was increased and fiber parallelization was decreased as the linear density of the sliver fed into the drawframe was increased, leading to end breakage during spinning.…”

Section: Introductionmentioning

confidence: 99%

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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“…The formation of hooks during carding and their reduction in the downstream drafting process have already been investigated by many researchers. 15–17 Morton and Summers 18 first observed the configuration of fibers in carded slivers by using a trace-fiber technique and classified them into five categories. Lindsley 19 used the ‘combing ratio’ and ‘orientation index’ to characterize the orientation of fibers in slivers and roving first, which was optimized by Fei 20 later, using fewer indicators to characterize fiber straightness more accurately.…”

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confidence: 99%

A study of fiber configuration in sliver fiber arrangement and its influence on sliver limit irregularity

Yang

Shen

Zhang

2019

Textile Research Journal

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Random fiber arrangement in slivers is the direct and intuitive factor resulting in sliver limit irregularity. In this study, by simulating the fiber arrangement in slivers, the effect of fiber configuration on sliver limit irregularity is investigated. The tracer fiber technique was employed to ascertain fiber straightness and the incidence of different fiber configurations in carded slivers. It is observed from the results that the majority of fibers are hooked in the carded sliver. It is fiber straightness rather than hook type that affects the sliver limit irregularity more; with the increase of fiber straightness, the sliver limit irregularity decreased. In addition, the simulation proposed in this study can not only portray fiber arrangement in slivers more practically, but also present sliver limit irregularity more accurately compared with the method mentioned in previous studies.

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The Effect of Drawing-Frame Variables on Cotton Fiber Hooks and Parallelization and Processing Performance

Cited by 20 publications

References 9 publications

Study of hooked fiber in cotton yarn based on tracer fiber method

Study of hooked fiber in cotton yarn based on tracer fiber method

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

A study of fiber configuration in sliver fiber arrangement and its influence on sliver limit irregularity

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