Descriptive differential attributes of type of fleeces in llama fibre and its textile consequence. Part 2: consequences of the dehairing process

Frank, Eduardo; Hick, Michel Victor Hubert; Adot, O.

doi:10.1080/00405000903474873

Cited by 12 publications

(12 citation statements)

References 8 publications

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“…Again, this is confirmed by the results found by Frank et al. 4 The most rigorous classing, therefore, could be selecting DC fleeces only, because these unify both characteristics that favor dehairing capability.…”

Section: Resultssupporting

confidence: 77%

“…According to the present work, the DC fleece which is positioned on the left side of the graphic shown in Figure 4 should perform better in a dehairing process. This was confirmed by Frank et al 4 Another important issue for the effectiveness of dehairing is that fibers which are passing through a dehairing machine have to reach the actual dehairing point one by one, and not entangled with each other (cotting). Therefore, previous to the actual dehairing, staples have to be opened and fibers have to be freed from each other.…”

Section: Conceptual Descriptionmentioning

confidence: 73%

“…Certainly, a lower mean fiber diameter would be equivalent to higher quality, given the big difference in the market value of animal fibers according to this fiber attribute. 2,3 This is due to the fact that one of the most demanded characteristics for animal fiber (besides the fiber diameter) is the absence of prickle, 4 which is caused by the ends of coarse fibers that protrude out of a fabric and press on the skin. 5 The coarse fibers, belonging to the so called coarse edge, 6 are known to be the fibers which are able to push on the skin's surface with so much force as to activate nerve cells, causing a sensation of prickle.…”

mentioning

confidence: 99%

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Conceptual description of the llama fleece structure and the potential of classing and dehairing

Brodtmann

Hick

Castillo

et al. 2017

Textile Research Journal

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For an overall description of llama fiber, its fleece structure and differences between fleece types are illustrated schematically, defined through a resumed evaluation, and determined as a compound of different fiber types. A dissection method is described and 252 samples of llama fleeces were dissected forming three fiber groups, within which fine, medium, and coarse fibers are gathered separately and, therefore, a dehairing process is simulated. Taking the group of fine fibers as a reference for the product to be obtained by dehairing, an average dehairing yield of 69% was calculated, which varies depending on the fineness of the fleece. The following fiber attributes were analyzed: fiber diameter, fiber length, crimp frequency, and crimp type. These were evaluated within fiber groups and among fleece types. The process of fleece classing regarding fineness is simulated through successively excluding coarse fleeces when evaluating the results. As a step previous to dehairing, and in order to assemble the most homogenous raw material, the necessity of fleece classing regarding fineness and type was confirmed. Fleece classing regarding fineness including only fleeces with a total mean fiber diameter lower than 28 µm and a subsequent dehairing process resulted in a mean of 21.6 µm for the group of fine fibers, with 96% of the fleeces with a mean fiber diameter of the group of fine fibers lower than 25 µm and 61% lower than 22 µm. We conclude that this segment of fine fibers reflects the potential of llama fiber as a textile raw material.

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Section: Resultssupporting

confidence: 77%

Section: Conceptual Descriptionmentioning

confidence: 73%

mentioning

confidence: 99%

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Conceptual description of the llama fleece structure and the potential of classing and dehairing

Brodtmann

Hick

Castillo

et al. 2017

Textile Research Journal

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“…The concept of hand encompasses several attributes: Comfort on the skin (itching), stiffness, bulkiness, smoothness and softness [4]. The notion of prickle (itching) applies to garments used in contact with the skin (directly or indirectly), placed on the forearm or pressed with the palm of the hand and fingers when the garment is purchased [5]. The fibers of domestic Camelids is seriously compromised, from a commercial standpoint, by this feature [6].…”

Section: Introductionmentioning

confidence: 99%

The Problem of Prickling on Fabrics of South American Camelids Fibers: Possible Approaches for Mechanical Solutions

Frank¹,

Hick²,

Neyra³

2017

ARJA

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In this minireview it is to analyze the physical attributes that determine the comfort of fabrics made of South American Camelid fibers (Lama and Alpaca), discuss the effect on their textile value and evaluate an possible approache on their possible mechanical solutions. Taking the distribution of all fibers do not respond to a normal distribution, but the different fiber types identified by the type of medulla, they do respond to a normal distribution. While emphasis has always been on mean fiber diameter, the fiber frequency exceeding 30 microns (objectionable fibres) has a key role in quality. This is essential for light fabrics, where the effect of prickle plays a critical part in consumer´s choice. Dehairing, as a mechanical way, provides an immediate solution, though excessive fiber breakage should be addressed. It is concluded that the textile fiber quality of South American Camelids is promissory if the presence of objectionable fibers is solved, resulting in a tolerable frequency for consumers (<3%). This implies a true paradigm shift with regard to the classic textile processing of Alpaca and Lama fibers (from worsted to woolen system). This would enhance the fiber softness to touch, together with other important features that would render the fiber price more competitive. Mini-review Article

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“…Los caracteres que determinan la calidad de la lana y de la fibra están en función a los requerimientos de la industria textil, en los que influyen el diámetro , color, longitud de la fibra, la variabilidad entre fibras (evaluado a través del coeficiente de variación), perfil del diámetro de fibra (variación del diámetro a lo largo de la fibra), resistencia a la tracción, factor de confort, entre otros (Lupton et al, 2006), los cuales mejoran ostensiblemente mediante el descerdado (proceso consistente en la extracción o eliminación de la fibra gruesa o pelos del conjunto de las fibras que componen el vellón), ya que se reduce el diámetro medio de la fibra, su coeficiente de variación y la finura al hilado, incrementándose a la vez el factor de confort, e índice de curvatura, tal como lo determinaron en cashemere McGregor y Butler (2008) y en llamas Pinares et al (2014), así como también reduce la sensación de picazón fundamentalmente en vellones de doble capa, siendo menos dicha reducción en vellones de capa simple (Frank et al, 2011).…”

Section: Introductionunclassified

Efecto del forraje sobre el rendimiento piezas de la canal y perfil hematológico de conejos destetados

2015

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Veinte conejos destetados, de peso inicial entre 667,49 y 678,80 g, fueron aleatoriamente asignados a cinco tratamientos (A, B, C, D, y E) en un diseño completamente al azar con cuatro repeticiones de un conejo. La dieta A (concentrado) sirvió como dieta control. Las dietas B y C se compusieron de forraje fresco de pasto elefante y de Tridax respectivamente; la dieta D fue una mezcla de forraje Tridax:Pueraria (60:40) y la E una mezcla de pasto elefante:Pueraria (60:40). El nivel de fibra bruta en Tridax (12,42 %), pasto elefante (33,59 %) y Pueraria (39,75 %) fue mayor que el del concentrado (5,89 %). El extracto etéreo en el concentrado (4,13 %) es comparable al de Tridax (6,14 %) y pasto elefante (2,35 %)e inferior al de Pueraria (11,10 %). El contenido de cenizas en el concentrado (6,12 %) es comparable al de los forrajes excepto Tridax (2,02 %). La ingestión de la dieta A es comparable a la de la D pero significativamente mayor que la de las otras dietas, tendencia que continúa semanalmente en lo relativo a la ganancia diaria y total de peso. La ingestión de materia seca de la dieta A es similar a la de la dieta D pero significativamente menor que en los restantes tratamientos. Los índices de conversión de las dietas A (3,66), D (3,73) y E (3,62) son significativamente menores (p

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Descriptive differential attributes of type of fleeces in llama fibre and its textile consequence. Part 2: consequences of the dehairing process

Cited by 12 publications

References 8 publications

Conceptual description of the llama fleece structure and the potential of classing and dehairing

Conceptual description of the llama fleece structure and the potential of classing and dehairing

The Problem of Prickling on Fabrics of South American Camelids Fibers: Possible Approaches for Mechanical Solutions

Efecto del forraje sobre el rendimiento piezas de la canal y perfil hematológico de conejos destetados

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