Neps in Cotton Processing

Hébert, J.; Mangialardi, Gino J.; Ramey, H. H.

doi:10.1177/004051758605600206

Cited by 18 publications

(7 citation statements)

References 3 publications

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“…moisture and foreign matter contents. Lint samples were taken for moisture and nonlint contents, high volume instrument (HVI) classification, Peyer Almeter analysis, 50-gram micro-spinning test [ 11 ], 1-gram nep test [8], and alkali centrifuge value test (ACV) [9]. , Waste from each lint cleaner was sampled and analyzed ' for the relative contents of lint and nonlint.…”

Section: Methodsmentioning

confidence: 99%

Effects of Mechanical Cleaning on Cotton Fibers

Bel

Columbus

Bragg

et al. 1991

Textile Research Journal

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Smooth leaf and hairy leaf Midsouth cottons were processed through minimum, two intermediate, and maximum gin cleanings. Based on fiber measurements after mill cleaning, minimum gin cleaning yielded the best fiber quality ( i.e., length, low short fiber content). Fiber damage as a result of maximum gin cleaning was evident through all levels of mill cleaning. There were also differences in nonlint content as a result of cleaning machinery and cotton varieties.

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Section: Methodsmentioning

confidence: 99%

Effects of Mechanical Cleaning on Cotton Fibers

Bel

Columbus

Bragg

et al. 1991

Textile Research Journal

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“…An example of optical microscope observation of those beads is shown in Figure 2 (top). It was noted during these preliminary observations that to the naked eye (or with very low magnification) the bead structures appear like dense knots on the surface of the fiber web (Figure 2-bottom), not unlike fiber entanglements or neps commonly observed on cotton fiber webs (ASTM, 1994;Hebert, Mangialardi, & Ramey, 1986;Iype & Wan, 1998;Mangialardi, 1985). Based on the foregoing observations, we attempted to count beads according to an approach inspired from the nep counting methods on cotton fiber webs, such as the British Standard Institute's method for determination of nep content of card web (BSI, 1974).…”

Section: The Journal Of the Textile Institutementioning

confidence: 88%

Occurrence and morphology of bead-on-string structures in centrifugal forcespun PA6 fibers

Krifa

Hammami

2014

The Journal of The Textile Institute

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This research aimed at investigating the morphology and frequency of bead-on-string occurrences on forcespun nano-and sub-micron fibers. The formation of bead-on-string structures was observed on a range of fiber samples forcespun in varied conditions from PA6 solutions of different concentrations. Bead-on-string structures were characterized for morphology using SEM micrographs, and were counted on all samples. Two major factors appeared to affect both the morphology and the bead count, namely spinning solution concentration, i.e. viscosity, and spinning needle gage or diameter. Low viscosity solutions resulted in large numbers of mostly spherical beads. Solutions with higher viscosity appeared to suppress the fluid jet instability thus resulting in significantly fewer beads with exclusively elongated spindlelike shapes. Spinning needle diameter also had a significant impact on beading behavior, with the larger diameter exhibiting higher bead counts. A significant interaction between the two factors was detected and its impact on the competition between the fluid jet visco-elastic relaxation and the Rayleigh instability is discussed.

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“…3). The negative eff ects of lint cleaning on nep generation and fi ber quality are well known (Griffi n, 1979;Hebert et al, 1986;Anthony et al,1988;Bange et al, 2010). The amount of lint cleaning and the lint cleaner mechanical confi guration (e.g., saw speed and the number of grid bars) varies between gins and there has been considerable argument as to how much lint cleaning is appropriate, and the merits of cleaner cotton to obtain better classing grades vs. inferior fi ber quality (Burley, 1959;Columbus et al, 1990).…”

Section: Nepsmentioning

confidence: 99%

Fiber Quality and Textile Performance of Some Australian Cotton Genotypes

et al. 2010

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Improving the quality of Australian cotton fiber is essential for maintaining industry viability. Two field experiments were conducted to assess the fiber quality and yarn performance of Australian bred cotton (five Gossypium hirsutum L. and one G. barbadense L.) genotypes. The work included the novel measurement of fiber maturity ratio, fiber linear density, and fiber diameter (ribbon width). The strongest yarns were produced using genotypes with the longest and finest fiber, for example, the strength of 20 tex yarns for the G. barbadense L. cultivar Sipima 280 (length = 36.6 mm, linear density = 143 mtex, ribbon width = 13.7 μm) was 25.4 cN tex−1 cf. the G. hirsutum L. cultivar Sicala 350B (length = 32.5 mm, linear density = 185 mtex, ribbon width = 14.5 μm) yarn strength of 18.1 cN tex−1 Micronaire was an inferior indicator of yarn performance, for example, the G. hirsutum L. breeding lines CHQX12B and CHQX377 each had micronaire values of 4.4, but CHQX377 spun stronger yarns due to its finer and more mature fiber. Lint cleaning had the greatest influence on nep (fiber knot) generation for G. hirsutum L. genotypes, generating on average 104 neps g−1 per lint cleaner passage. There was a negative association between fiber quality and yield, and a cost benefit analysis showed that fiber yield was the dominant economic factor compared to price premiums for better fiber quality. Alternative methods of determining fiber fineness will improve the value of Australian cotton.

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Neps in Cotton Processing

Cited by 18 publications

References 3 publications

Effects of Mechanical Cleaning on Cotton Fibers

Effects of Mechanical Cleaning on Cotton Fibers

Occurrence and morphology of bead-on-string structures in centrifugal forcespun PA6 fibers

Fiber Quality and Textile Performance of Some Australian Cotton Genotypes

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