Packing Density of Compact Yarns

Yılmaz, Demet; Göktepe, Fatma; Göktepe, Özer; Dana, Kausik

doi:10.1177/0040517507078796

Cited by 49 publications

(48 citation statements)

References 9 publications

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“…As shown in Figure 1, on the last radial ring, a few fiber areas were located at a considerably higher distance than that of most of the fibers. 1 So we need to obtain the real yarn diameter as much as possible. The effective yarn diameter D ef obtained from the fiber packing density distribution was considered as the best value representing the real yarn diameter.…”

Section: Evaluation Of Fiber Packing Density In Yarn Cross Sectionmentioning

confidence: 99%

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A study of the fiber distribution in yarn cross section for vortex-spun yarn

Zheng

Zou

Shen

et al. 2012

Textile Research Journal

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The image-processing method, based on Photoshop software, was used to analyze the fiber distribution pattern in yarn cross section for vortex-spun yarn. Fiber packing density and fiber effective packing density, as well as the fiber migration index, were investigated to provide a better understanding of the internal structures of vortex-spun yarn. The research results indicate that the vortex-spun yarn has a lower fiber packing density value than the conventional ring-spun yarn at the yarn center and surface. For the bamboo pulp fiber/white cotton blend vortex-spun yarn, the bamboo pulp fibers are more easily distributed in the yarn core. In addition, the coarser the vortex-spun yarn, the higher the migration level of the bamboo pulp fiber tending to migrate towards the inner layer of the blend yarn.

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Section: Evaluation Of Fiber Packing Density In Yarn Cross Sectionmentioning

confidence: 99%

“…There are many yarn properties, such as yarn strength, elongation, appearance and compactness, concerned with the fiber arrangement. 1 The early research on fiber packing density had been reported by Schwarz in 1951. 2 Schwarz 2 proposed two systems of packing: one being open packing and the other being close hexagonal packing.…”

mentioning

confidence: 99%

A study of the fiber distribution in yarn cross section for vortex-spun yarn

Zheng

Zou

Shen

et al. 2012

Textile Research Journal

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“…Yilmaz, Goktepe, Goktepe, and Kremenakova (2007) have analyzed the effect of type of compact spinning machine on the fiber packing density.…”

Section: Introductionmentioning

confidence: 99%

Study of fiber packing density of lyocell ring‐spun yarns

Salehi¹,

Johari²

2011

Journal of the Textile Institute

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The study of yarn structure and related yarn properties has been the subject of much research. However, the study of the fiber packing density, which has practical significance for a number of yarns and their characteristics, has been limited to circular yarns because of the disordered yarn structure. In this paper, the fiber packing density of lyocell ring-spun yarns is determined with the image analysis method. This method does not have any limitation with regard to the fiber cross-sectional shape. The effect of yarn count, twist factor, spindle speed, traveler weight and front roller diameter on the fiber packing density in the yarn cross-section is analyzed. The results of this paper and the data published in other scientific works are in good agreement.

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“…Because textile yarns are neither continuous nor perfectly elastic, in this study, we apply the above definition to the yarns and called it as apparent Poisson's ratio. The relationships between physical properties and both the tensile property and geometry of the cross-section of a yarn have been widely investigated [11][12][13][14][15][16][17][18]27]. Barella [19] measured the yarn diameter under different tensile loads using a projection microscope.…”

Section: Introductionmentioning

confidence: 99%

Continuous measurement of apparent Poisson’s ratio for yarn based on omni-directional diameters

Takatera

Arichi

Peiffer

et al. 2016

Textile Research Journal

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We proposed a new method of measuring apparent Poisson's ratio for yarn and developed a new tensile tester equipped with a digital micrometer that can measure the yarn's omni-directional diameter annularly while the yarn is elongated. Values of apparent Poisson's ratio were obtained from the longitudinal and transverse strains continuously. The mean diameter measured omnidirectionally was used to calculate the transverse strain for each longitudinal strain. We tested five spun yarns, one mono filament yarn and two filament yarns and obtained values of apparent Poisson's ratio against longitudinal strain for all samples. Apparent Poisson's ratio was not constant for spun and filament yarns while it was constant for monofilament yarn. When the longitudinal strain was low, apparent Poisson's ratios of ring spun yarns and filament yarns were large owing to the fiber packing density. As the longitudinal strain increased, apparent Poisson's ratio gradually decreased. Furthermore, we approximated the relationship between apparent Poisson's ratio and the longitudinal strain using a power function. The apparent Poisson values can be used in the simulation of fabrics.

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Packing Density of Compact Yarns

Cited by 49 publications

References 9 publications

A study of the fiber distribution in yarn cross section for vortex-spun yarn

A study of the fiber distribution in yarn cross section for vortex-spun yarn

Study of fiber packing density of lyocell ring‐spun yarns

Continuous measurement of apparent Poisson’s ratio for yarn based on omni-directional diameters

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