Study of fiber packing density of lyocell ring‐spun yarns

Salehi, Maryam; Johari, Majid Safar

doi:10.1080/00405000.2010.482341

Cited by 9 publications

(8 citation statements)

References 10 publications

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“…It is observed from our results that maximum packing density of these yarns occurs at some different distances from the yarn axis and it sharply decreases from that point towards yarn surface. Similar trends were also observed by other researchers [7,8,17,18,19]. Soni [20] and Kumar et al [21] observed maximum helix twist at some distance from the yarn axis.…”

Section: Radial Packing Density Of Control and Engineered Yarnssupporting

confidence: 91%

Study of engineered carpet yarns structure; Part B: By cross-sectional microtomy

Ishtiaque¹,

Sen²,

Kumar³

2013

Journal of Industrial Textiles

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This paper describes the measurement of packing density and radial packing density of newly developed three-layered, wool structure yarn for pile carpets. Three different varieties of Indian wool, in terms of fibre diameter, medullation and bending rigidity, were strategically positioned in the (ring spun) yarn cross-section. The measurements of all the researched yarns have shown that radial packing density is neither uniform across the yarn cross-section nor maximum at yarn core. The maximum packing density of these yarns occurs at some different distances from the yarn axis and it sharply decreases from that point towards yarn surface. In general, all the yarns are seen to have slight hollowness near their axis. The possible mechanism of the fibre density distribution in the yarn cross-section is also discussed.

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Section: Radial Packing Density Of Control and Engineered Yarnssupporting

confidence: 91%

Study of engineered carpet yarns structure; Part B: By cross-sectional microtomy

Ishtiaque¹,

Sen²,

Kumar³

2013

Journal of Industrial Textiles

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“…The calculated packing densities of the given yarns (although need more samples for verification) are comparable to the results calculated using traditional methods for yarns of similar counts. 11,22,23 This agreement, however, contradicts our expectations of getting packing density values higher than the values obtained from traditional methods that add extra porosity to the yarn structure by considering a circular cross-sectional shape of the yarn. It can be explained, on the other hand, by the decreased area of fibers detected by the automated CV segmentation method that does not consider the wall of the fiber (e.g.…”

Section: Other Yarn Case Studiescontrasting

confidence: 78%

Chan-Vese segmentation model for faster and accurate evaluation of yarn packing density

Eldessouki

Salmani

2015

Textile Research Journal

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Yarn packing density is an important parameter in correlating the internal structure of the yarn to its final properties and performance. The current methods of determining the yarn packing density have three main drawbacks: they are labor dependent, they are time consuming, and they approximate many parameters of the fibers and the yarn. The current work utilizes the Chan-Vese (CV) segmentation model to detect the actual contours of the yarn and the fibers inside its cross-section. This algorithm allows the automation of the process which reduces the time required for the analysis and makes it independent from the human element. The method also avoids the approximations involved in the traditional methods by calculating the actual areas of the fibers and the yarn which makes it more precise in determining the yarn packing density. A user-friendly graphical user interface (GUI) was developed to utilize the CV algorithm and calculate different yarn parameters such as the yarn's radial packing density, the yarn's effective diameter, and the yarn's effective packing density. The area ratio factor (ARF) was used as a quick indicator of the accuracy of fiber segmentation. The CV algorithm was described in detail and tested with ring-spun yarns from different materials and the results were found to be in agreement with the reported values of such yarns. The introduced method can be extended to the evaluation of fibrous materials other than yarns.

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“…Apparently, η3 is positively related with α and η2. From the previous research [35–37], η2 relevant to the twist of yarn and the morphologies of single fiber and its trajectory within yarn ranges from 30% to 70% while the theoretical value of α is nearly 1%. Thus,where ηitalicair is the maximum volume fraction of air within yarn.…”

Section: Resultsmentioning

confidence: 84%

Investigation on the processability, structure and properties of micro-/nano-fiber composite yarns produced by trans-scale spinning

Yang

Quan

Zhang

et al. 2020

Journal of Industrial Textiles

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While the conventional composite yarns are generally confined to micro-scale fibers, composite yarns of micro-/nano-fibers have been fabricated by integrating carded fibrous web with electospun nanofibers, namely trans-scale spinning proposed in our latest works. In the micro-/nano-fiber composite yarns, the nanofibers with low content were embedded uniformly both inside and outside with short fibrous segments, which endows themselves with superior functionality without altering the intrinsic comfort, such as the durably efficient antibacterial capability of comfortable cotton fabric. In the present work, universal applicability of the trans-scale spinning approach has been investigated systematically. Various composite yarns were successfully fabricated by the novel spinning technique. The effects of three critical factors, microfiber materials, nanofiber polymers and spinning methods, on the structural characteristics and physical properties of composite yarns were demonstrated experimentally and theoretically. It was indicated that nanofibers are distributed uniformly in all resulting yarns, but broken segments of them in synthetic microfiber composite yarns are shorter than that in cotton composite yarns, which may result from different fiber appearance. Besides, the composite yarns present comparable physical properties (tensile performance, hairiness, unevenness) to those of pristine microfiber yarns, which enable themselves of being manufactured into all kinds of fabrics for industrial applications. The results reported in the current study would facilitate the design and preparation of composite yarn and the development of functional textiles.

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Study of fiber packing density of lyocell ring‐spun yarns

Cited by 9 publications

References 10 publications

Study of engineered carpet yarns structure; Part B: By cross-sectional microtomy

Study of engineered carpet yarns structure; Part B: By cross-sectional microtomy

Chan-Vese segmentation model for faster and accurate evaluation of yarn packing density

Investigation on the processability, structure and properties of micro-/nano-fiber composite yarns produced by trans-scale spinning

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