Properties

  • A Comparative Study of the Mechanical Properties of Wool and Alpaca Fibres

    Authors:
    Liu, Xin, Hurren, Christopher and Wang, Xungai

    Date of Publication:
    2005

    Publication:
    Proceedings of the 11th International Wool Research Conference, The University of Leeds, Leeds, England

    Summary:
    This study reports the latest research into alpaca and wool fibres. In particular, those properties that have received little attention in research literature have been examined. They include single fibre abrasion and bending fatigue, single fibre tensile properties, as well as resistance to compression behaviour. These properties are important because they affect the softness and pilling propensity of these fibres and the resultant fabrics. Clean wool and alpaca fibres were used in this study. Fibre abrasion/bending fatigue measurements were carried out using a Textechno FIBRESTRESS instrument. The resistance to compression (RtC) tests were carried out according to Australian Standard AS3535-1988. The results indicate that wool and alpaca fibres behave quite differently, even though both fibre types are of animal origin. Wool fibre resistance to compression decreases as fibre diameter increases while the opposite appears to occur for alpaca fibres. For both wool and alpaca the number of abrasion/bending cycles at fibre break increases with an increase in fibre diameter, it takes longer to break the alpaca fibres. Reasons for these differences have been postulated based on differences in fibre surface and structure between alpaca and wool.

    Read the rest of the article: http://dro.deakin.edu.au/view/DU:30014416

  • A Review of Sheep Wool Quality Traits

    Authors:
    B. W. B. Holman and A. E. O. Malau-Aduli

    Date of Publication:
    2012

    Publication:
    Annual Review & Research in Biology, 2(1): 1-14, 2012

    Abstract:
    The commercial value of unprocessed wool is determined by its intrinsic quality; an indication of capacity to meet both processor and consumer demands. Wool quality is evaluated through routine assessment of characteristics that include mean fibre diameter, coefficient of variation, staple characteristics, comfort factor, spinning fineness, fibre curvature and clean fleece yield. The association between these characteristics with wool quality stems from their correlation with raw wool processing performance in terms of speed, durability, ultimate use as apparel or carpet wool, and consumer satisfaction with the end-product. An evaluation of these characteristics allows wool quality to be objectively quantified prior to purchase and processing. The primary objective of this review was to define and explore these aforementioned key wool characteristics, focusing on their impact on quality, desirable parameters and methodology behind their quantification. An in-depth review of relevant published literature on these wool characteristics in sheep is presented.

    Read the rest of the article: https://researchonline.jcu.edu.au/41047/1/41047%20Holman%20and%20Malau-Aduli%202015.pdf

  • A Survey of the Relationships of Crimp Frequency, Micron, Character and Fibre Curvature

    Author:
    Cameron Holt
    International School of Fibres, Pambula Beach, New South Wales, Australia

    Date of Publication:
    January 2006

    Publication:
    International School of Fibres

    Overview:
    Information on the relationships between micron, curvature, crimp frequency and character.

    Read the rest of the article: https://www.alpacaconsultingusa.com/library/curve.pdf

  • Alpaca Fiber Study by AOBA

    Author:
    AOBA Fiber Committee

    Date of Publication:
    unknown

    Publication:
    Alpaca Culture

    Excerpt:
    Alpaca is flame resistant, meeting the standards of the US Consumer Product Safety Commission’s rigid testing specifications as a Class 1 fiber for use in clothing and furnishings.

    Alpaca is resistant to external water penetration like wool, but can slowly wick away perspiration because of its unique ability to act like cotton in moisture regain. These factors are what makes alpaca feel lighter than wool, but warmer than cotton in cool, damp conditions.

    Alpaca is water resistant, making spills easy to clean up before water saturates the fiber allowing stains to develop. It is also adsorbent to oils, meaning that the oils do not penetrate the fibers, but merely cling to the fiber for easy cleaning without harsh chemicals.

    Alpaca is free of lanolin, and thus can be processed without the need for high temperatures or harsh chemicals in washing.

    Alpaca is a natural renewable fiber with a wide range of applications.

    Read the rest of the article: http://alpacaculture.com/40-helpful-information/research-articles/handling/72-alpaca-fiber-study-by-aoba

  • Alpaca Fiber: One of the Softest Natural Fibers on Earth

    Author:
    The Alpaca ​Hacienda

    Date of Publication:
    unknown

    Publication:
    The Alpaca ​Hacienda

    Excerpt:
    Luxurious to the touch, yet warm, cozy and lightweight, garments made from alpaca fiber are quickly catching on as one of the world’s best kept secrets in the clothing and fashion industry.  Once you’ve experienced alpaca, you can never go back wool for winter wear.  

    Alpaca fiber has a long and colorful history. The ancient tribes of the Andean highlands of Peru, Argentina, Chile and Bolivia were the first to domesticate the wild vicuna which was, and still is indigenous to the area. By selectively breeding this animal, the alpaca breed was developed, becoming a crucial component  for the survival of these tribes by providing meat, fiber, hide, fuel and basis for monetary exchange.

    Read the rest of the article: https://www.thealpacahacienda.com/alpaca-fiber.html

  • Benefits of Alpaca Fiber

    Author:
    Fibers of the World

    Date of Publication:
    unknown

    Publication:
    Fibers of the World

    Excerpt:
    Long ago, alpaca fiber was reserved for royalty. Today, it is sold several ways. Hand-spinners and fiber artists buy raw fleece. Knitters often purchase alpaca yarn. Fiber cooperatives mills collect alpaca fiber and process it on behalf of the producer.

    Read the rest of the article: http://www.fibersoftheworld.com/fiber-animals/fiber-for-sale/benefits-of-alpaca-fiber/

  • Don't Let Micron Madness Crimp Your Style

    Author:
    Mike Safley
    Northwest Alpacas, Hillsboro, Oregon, United States

    Date of Publication:
    unknown

    Publication:
    HaSu Ranch Alpacas

    Excerpt:
    Everyone who comes on the farm these days is concerned about two items - micron count and crimp. I, myself, have written much about the virtues of skinny fleece and bold crimp, so I began to ponder whether this narrow focus was all that healthy for our industry.

    Read the rest of the article: http://www.hasu.biz/index.cfm?fuseaction=feature.display&feature_id=84&CFID=869129&CFTOKEN=36083298

  • Evaluating the Softness of Wool and Alpaca Fibers Based on Single-Fiber Bending Test

    Authors:
    Liu Yu-qing, Yu Wei-dong

    Date of Publication:
    2006

    Publication:
    Wool Textile Journal, 2006-08

    Abstract:
    The bending evaluation of the softness of single fiber is important information for both the basic investigation of fiber bending properties and the textile softness. A single fiber axial compression bending measurement is presented. The resistance to bending behavior of wool and alpaca fibers has been compared by a column buckling method. It shows that alpaca fibers have a much higher resistance to bending namely higher bending stiffness than wool and the softer feeling of alpaca fibers mainly due to the lower surface frictional resistance namely easy to slip between fibers.

    Read the rest of the article: http://en.cnki.com.cn/Article_en/CJFDTOTAL-MFKJ200608011.htm

  • Fiber Characteristics of U.S. Huacaya Alpacas

    Authors:
    Angus McColl, Chris Lupton and Bob Stobart

    Date of Publication:
    2004

    Publication:
    Alpacas Magazine, Summer 2004, pp. 186-196

    Overview:
    This study sought to define the ranges of quality attributes of domestically-produced huacaya alpaca fiber using internationally accepted methods to objectively measure most of the important fiber characteristics.

    Read the rest of the article: http://www.alpacaresearch.org/_resources/e30d:mu23c5/files/319759z7dbdf304/_fn/fiber-characteristics-of-huacayas.pdf

  • Fibre Curvature in Alpacas

    Author:
    SGS Wool Testing Services
    Wellington, New Zealand

    Date of Publication:
    2011

    Publication:
    SGS Wool Testing Services

    Introduction:
    With the increased interest in the measurement of fleece samples from alpacas, a number of questions have been raised concerning the meaning of mean fibre curvature on these samples.

    Whilst some information has been published, there appear to be some divergent views expressed on the importance of this measurement. This bulletin is intended to impart some factual information which may be useful to growers trying to understand the measurement.

    Read the rest of the article: http://www.sgs.co.nz/~/media/Local/New%20Zealand/Documents/Technical%20Documents/Technical%20Bulletins/Wool%20Testing%20Info%20Bulletins/SGS-AGRI-5-13-Fibre-Curvature-Alpacas-A4-EN-11-V1.pdf

  • Fibre Diameter and Insulation in Alpacas: The Biophysical Implications

    Authors:
     K.E. Moore, D. Blache, S.K. Maloney

    Date of Publication:
    April 2011

    Publication:
    Small Ruminant Research, Volume 96, Issues 2-3, Pages 165–172

    Abstract:
    Fibrous fur or fleece coats have an important role in insulating animals and aiding in the maintenance of homeothermy. Alpacas, raised for fibre production, are selected towards the finest fibre to improve the wearability of their fibre in garment form. The thermal consequences of reducing the fibre diameter on the external insulation are unknown, and may have a negative effect for the alpaca’s thermal balance. We hypothesised that for a given fibre density, finer fibres would trap more air and provide lower thermal conductivity when exposed to low wind speed, but would be less robust, and so provide less insulation, when exposed to higher wind speed, than thicker fibres. We measured the thermal conductance of eight pelts of similar fibre density but with varying fibre diameter at 0, 1, 2, 4 and 6 m/s wind speeds. Thermal conductivity was similar between pelts of different fibre diameters (P = 0.58) at low wind speed. Conductance increased more in pelts with finer fibres at the high wind speed than in pelts with thicker fibres (P = 0.02). Thus at the same fibre density, finer fibres result in increased heat loss at high wind speed. Increased heat loss at higher wind speed would result in the animal requiring more energy to maintain heat balance below the lower critical temperature, which will reduce fibre production efficiency.

    Read the rest of the article: https://www.smallruminantresearch.com/article/S0921-4488(11)00041-1/abstract

  • Fibre Diameter, Staple Strength, Style, Handle and Curvature

    Author:
    Tony Schlink

    Date of Publication:
    2009

    Publication:
    The Australian Wool Education Trust

    Excerpt:
    On completion of this topic you should be able to:
    • demonstrate an understanding of fibre diameter and the economic importance of fibre diameter
    • explain and calculate the difference between the standard deviation of diameter and the coefficient of variation of diameter
    • define the relationship between mean diameter, diameter variation and “coarse edge” or “prickle”
    • measure staple strength and describe its economic importance
    • explain the sources of variation in staple strength within a mob of sheep
    • describe localised vs generalised fibre weakness as determinants of staple strength
    • define and quantify the relationship between staple strength and each of minimum diameter, along-staple diameter variation, rate of change in diameter, fibre length variation and intrinsic fibre strength
    • relate raw wool style including the main component traits to economic importance
    • explain the influence of fibre diameter and fibre crimp on wool handle
    • describe fibre curvature and the value of curvature

    Read the rest of the article: http://www.woolwise.com/wp-content/uploads/2017/07/Wool-412-512-08-T-03.pdf

  • How important is Fiber Quality in Alpacas?

    Author:
    Ted Chepolis
    Pine Lake Alpacas, United States

    Date of Publication:
    unknown

    Publication:
    New England Alpaca Owners and Breeders Association

    Excerpt:
    Crimp is related to the fibers as they appear in an intact lock. Its measured in waviness per unit of length. The prevailing theory is the greater the crimp, the finer the fleece. Cameron pointed out this isn’t always the case, however. Many Peruvian alpacas have recently been examined that have little or no crimp, but very fine fleeces.

    Read the rest of the article: http://www.neaoba.org/page/3833/neaoba-how-important-is-fiber-quality-in-alpacas

  • Internal Structure and Pigment Granules in Colored Alpaca Fibers

    Authors:
    Huimin Wang, Xin Liu, Xungai Wang

    Date of Publication:
    September 2005

    Publication:
    Fibers and Polymers (2005) 6: 263

    Abstract:
    Alpaca fibers have some distinct properties such as softness and warmth, which have not been fully understood in combination with the fiber internal structures. In the present investigation, the internal structures of alpaca fibers have been closely examined under the scanning electron microscope (SEM), especially in the longitudinal direction. The results showed that numerous pigment granules reside loosely inside pockets in brown and dark-brown alpaca fibers. These pigment granules were mainly distributed inside the cortical cells, the medullation regions as well as underneath the cuticles. Their size in the brown alpaca fibers was smaller and more uniformly round than in the dark-brown fibers. These granules in colored alpaca fibers loosen the bundle of cortical cells, providing many crannies in the fibers which may contribute to the superior flexibility, warmth and softness of the fibers. Moreover, there are no heavy metal elements found in the granules. The mordant hydrogen peroxide bleaching employed could eliminate the pigment granules and create many nano-volumes for further dyeing of fibers into more attractive colors.

    Read the rest of the article: https://link.springer.com/article/10.1007/BF02875652

  • Investigation of the Dyeing Characteristics of Alpaca Fibers (Huacaya And Suri) in Comparison With Wool

    Authors:
    Rıza Atav, Fatih Türkmen

    Date of Publication:
    January 7, 2015

    Publication:
    Textile Research Journal, Vol 85, Issue 13, 2015

    Abstract:
    Luxury fibers have great importance in the field of high added value fabric production, but the studies related to these fibers are very limited. One of these luxury proteinous fibers is alpaca wool. In this study, dyeing characteristics (dye-uptake speed, color efficiency and nuance of color, fastness properties, etc.) of alpaca fibers (Huacaya and Suri) were investigated by taking sheep wool as a reference. Furthermore, analysis such as scanning electron microscopy, energy dispersive X-ray and Fourier-transform infrared spectroscopy was also carried out. According to the experimental results it was found that both dye-uptake speed and amount was in the range of sheep > Suri alpaca > Huacaya alpaca for milling acid dye. Furthermore, when their fastness properties were compared with sheep wool, it could be said that there was no difference for washing and perspiration fastness, while rubbing and light fastness of alpaca fibers were lower than sheep wool.

    Read the rest of the article: http://journals.sagepub.com/doi/abs/10.1177/0040517514563727

  • Is Crimp Important?

    Author:
    Cameron Holt

    Date of Publication:
    2006

    Publication:
    unknown

    Introduction:
    Much has been written about crimp and the relationship with curvature, frequency and microns, as well as curvature and compression. Many of the comments you hear are fact and fiction. We have heard the crinkle theory, the popcorn theory and various statements like “crinkle provides bulk which is created by the air pockets” (processors have concerns re the lack of bulk in Huacaya fibre – products too heavy) and of course that “crimp frequency is a reliable indicator of fineness”.

    I will demonstrate quite clearly that well-defined crimp is more consistent in its relationships with crimp frequency, curvature and micron.

    Read the rest of the article: https://www.alpacaconsultingusa.com/library/crimp2.pdf

  • Relationships Between Skin Follicle Characteristics and Fibre Properties of Suri and Huacaya Alpacas and Peppin Merino Sheep

    Authors:
    M. B. Ferguson, B. A. McGregor and R. Behrendt

    Date of Publication:
    April 3, 2012

    Publication:
    Animal Production Science 52(7) 442-447

    Abstract:
    We aimed to quantify the number, type and arrangement of skin follicles in Huacaya and Suri alpaca skin and correlate their follicle characteristics with fibre traits of harvested fibre and compared these relationships with those of Merino sheep. Fibre and skin samples were collected from the mid-side of 12 Huacaya alpacas, 24 Suri alpacas and 10 Merino sheep. The mean fibre diameter (MFD ± s.e.) of the Huacaya and Suri were: 35.5 ± 0.9 and 28.3 ± 1.0 μm, respectively. The follicle groups found for alpacas were very different from the normal trio of primary follicles found in sheep and goats. The follicle group of the alpacas consisted of a single primary follicle surrounded by a variable number of secondary follicles. The mean ± s.e. primary follicle density was 3.1 ± 0.3 and 2.7 ± 0.1 follicles/mm2 for Huacaya and Suri, respectively. The mean ± s.e. secondary follicle density (SFD) was 13.7 ± 1.2 and 17.5 ± 0.6 follicles/mm2 for Huacaya and Suri, respectively. The mean ± s.e. ratio of secondary to primary follicles (S/P ratio) was 5.1 ± 0.5 for the Huacaya and 7.3 ± 0.2 for the Suri alpacas. The sheep had higher S/P ratios and SFD, lower MFD and produced significantly heavier fleeces. The key correlations found between traits in alpacas include a negative correlation between SFD and MFD (r = –0.71, P = 0.001) and a negative correlation between S/P ratio and MFD (r = –0.44, P = 0.003) and a positive correlation between S/P ratio and total follicle density (r = 0.38, P = 0.010). The study revealed that important relationships exist between alpaca skin follicle characteristics and fibre characteristics. It was the number of secondary follicles in a group that imparts density and a corresponding reduced MFD.

    Read the rest of the article: http://www.publish.csiro.au/an/an11233

  • Research on Structure and Performance of Several Animal Wool Fiber

    Author:
    Wu Pei-yun

    Date of Publication:
    2008

    Publication:
    Shanghai Textile Science & Technology, 2008-12

    Abstract:
    In the article are introduced the fine structural characters of sheep hair, alpaca hair and mohair, and tested and compared their functions of strong stretch, crimp and friction. The result shows that the scale of alpaca hair and mohair is thin and dense. Alpaca hair has interrupted or widely-bodied pith cavity, whose scale is not as clear as the other two. Mohair and alpaca hair own a high initial mold and strength, little crimp and friction factor and worse fulling ability. Although they are hard for spinning, yet their product is of fine elasticity, crease resistance and size stability.

  • Research on the Strength and Friction Property of Alpaca After Protease Processing

    Authors:
    Chen Qian-wei, Zhang Yin, Zhang Yi-xin, Zhang Peng-fei

    Date of Publication:
    2008

    Publication:
    Progress in Textile Science & Technology, 2008-02

    Abstract:
    The alpaca fiber weight-loss was carried using the method of H_2O_2 oxidation pretreating combined with Wolsen acid protease processing. The strength and surface friction property was researched after weight-loss slenderizing, and the relationship between the processing condition of Wolsen acid protease and weight-loss, scale frictional coefficient, and frictional effect were analyzed. At last, the linear fit and regression equation between strength retention and weight-loss of alpaca were educed.

    Read the rest of the article: http://en.cnki.com.cn/Article_en/CJFDTOTAL-SCFK200802028.htm

  • Resistance to Compression Behavior of Alpaca and Wool

    Authors:
    Xin Liu, Lijing Wang, Xungai Wang

    Date of Publication:
    March 2004

    Publication:
    Textile Research Journal, Vol 74, Issue 3, 2004

    Abstract:
    This study compares the resistance to compression behavior of wool and alpaca fibers. It shows that alpaca fibers have a much lower resistance to compression than wool, and there is little correlation between the resistance to compression and the curvature for alpaca fibers. Yet for wool fibers, the correlation between resistance to compression and curvature is very strong and positive. The differences in fiber curvature and scale profiles of alpaca and wool, together with the test method for resistance to compression, may explain their different resistances to compression.

    Read the rest of the article: http://journals.sagepub.com/doi/abs/10.1177/004051750407400314

  • Staple Strength

    Author:
    Australian Wool Innovation Limited

    Date of Publication:
    unknown

    Publication:
    Australian Wool Innovation Limited

    Excerpt:
    Staple strength is an important price factor for many wool types and wool growing regions. However direct staple strength assessments for breeding purposes are very expensive.

    The indirect assessment for staple strength, Coefficient of Variation for Fibre Diameter (fibre diameter variability along and across the fibre), is proven to be well correlated with staple strength within a flock, but less so for across-flock comparisons.

    AWI and the Department of Agriculture and Food WA have investigated if Coefficient of Variation across the fibre alone, is a better predictor of staple strength for breeding purposes.

    Read the rest of the article: https://www.wool.com/on-farm-research-and-development/sheep-health-welfare-and-productivity/sheep-breeding/staple-strength/

  • The Effect of Micron and Density on Fleece Weight

    Author:
    Ian Watt
    Morro Bay, California, United States

    Date of Publication:
    unknown

    Publication:
    Alpaca Consulting Services USA

    Overview:
    The effect of micron and density on fleece weight yields is discussed and illustrated with graphs.

    Read the rest of the article: https://www.alpacaconsultingusa.com/library/fleeceweight.pdf

  • The Spin On Suris and How They Differ From Huacayas

    Authors:
    Cameron and Joy Holt

    Date of Publication:
    May 2007

    Publication:
    www.cameronholt.com

    Excerpt:
    The Suri should grow a very lustrous silky dense fibre, which hangs in individual locks, vertical to the body (similar to that of a mohair goat). These locks come in various types, with the ringlet formation and the wave with twist being the most popular.

    Read the rest of the article: http://www.cameronholt.com/TheSpinOnSuris.pdf


  • Variation in Fibre Diameter Profile Characteristics Between Wool Staples in Merino Sheep

    Authors:
    D.J. Brown, B.J. Crook and I.W. Purvis

    Date of Publication:
    2000

    Publication:
    Wool Technology and Sheep Breeding 48(2), 86-93

    Summary:
    Two experiments were conducted to examine the variation in fibre diameter profile (FDP) characteristics between staples. The mean values of all the FDP characteristics were not significantly (P > 0.05) different between staples prepared using the same and different staple preparation techniques. The residual correlation coefficient’s between staples prepared using the same staple preparation technique for all FDP characteristics ranged from r = 0.60 to 0.96. The correlation coefficients between staples prepared using different staple preparation techniques ranged from r = 0.37 to 0.97. These results indicate that it may not be sufficient to segment a single staple for estimation of certain FDP characteristics to examine differences between individual animals. One staple is sufficient to estimate the average FDP of a group of animals. FDPs generated using different staple preparation techniques can be accurately compared for most FDP characteristics.

    Read the rest of the article: http://agbu.une.edu.au/publications/wtsb_99_026.pdf

  • Variation in the Softness and Fibre Curvature of Cashmere, Alpaca, Mohair and Other Rare Animal Fibres

    Author:
    B.A. McGregor
    Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, Victoria, Australia

    Date of Publication:
    2013

    Publication:
    The Journal of The Textile Institute, 105:6, 597-608

    Abstract:
    Softness of apparel textiles is a major attribute sought by consumers. There is surprisingly little objective information on the softness properties of rare animal fibres, particularly cashmere, alpaca and mohair. Samples of these and other rare animal fibres from different origins of production and processors were objectively measured for fibre diameter, fibre curvature (FC, crimp) and resistance to compression (softness). While there were curvilinear responses of resistance to compression to FC and to mean fibre diameter, FC accounted for much more of the variance in resistance to compression. Fibre type was an important determinant of resistance to compression. The softest fibres were alpaca, mohair and cashgora and all of the fibres measured were softer than most Merino wool. Quivet, llama, camel, guanaco, vicuña, yak wool, bison wool, dehaired cow down and Angora rabbit were also differentiated from alpaca, mohair and cashmere. There were important differences in the softness and FC of cashmere from different origins with cashmere from newer origins of production (Australia, New Zealand and USA) having lower resistance to compression than cashmere from traditional sources of China and Iran. Cashmere from different origins was differentiated on the basis of resistance to compression, FC and fibre diameter. Cashgora was differentiated from cashmere by having a lower FC and lower resistance to compression. There were minority effects of colour and fibre diameter variation on resistance to compression of cashmere. The implications of these findings for the identification and use of softer raw materials are discussed.

    Read the rest of the article: https://www.tandfonline.com/doi/abs/10.1080/00405000.2013.828448

  • Variation of Fibre Characteristics Among Sampling Sites for Huacaya Alpaca Fleeces from the High Andes

    Authors:
    B.A. McGregor, H.E. Ramos, E.C. Quispe Peña

    Date of Publication:
    February 2012

    Publication:
    Small Ruminant Research, Volume 102, Issues 2-3, Pages 191–196

    Abstract:
    In the Huancavelica region of Peru alpacas form the main and often only means of deriving an income for 3300 poor families in 60 communities. Ninety percent of alpacas in the region are Huacaya which are grazed at altitudes 4000–4800 m. Little attention has been paid to alpacas grazed in the High Andes. We aimed to: (i) quantify the variation in alpaca mean fibre diameter (MFD), fibre diameter coefficient of variation (CVD), fibre curvature (FC) and staple length (SL) among 24 sampling sites, (ii) quantify the difference between the mid-side sampling site and other fleece components for each fleece attribute, (iii) identify the sampling site with the highest correlation to the fibre attributes of the fleece in general, and (iv) quantify the relationship between FC and MFD for alpaca. Adult female alpacas (n = 31, mean live weight 71 kg) were sampled and had their fleece weighed in 8 components. Total mean fleece weight was 3.35 kg (range 2.13–6.01). Staples were measured for length (mm) and tested on the OFDA2000 to determine MFD, CVD and FC. The effect of the site was determined using ANOVA analysis. Values for FC were log10 transformed. Correlations between sites and regression analysis between MFD and FC were performed. The mean values for the mid-side site were: MFD 26.3 μm; CVD 20.2%; FC 34.9 °/mm; SL 91 mm, which were finer and longer than other fleece components. The variation in MFD between the 24 sampling sites was 20.2–50.6 μm and between 9 sampling sites in the main fleece saddle was 24.8–31.7 μm. Fleece attributes varied significantly between all fleece components and among fleece sites (P < 0.001). Differences between the mid-side MFD and the MFD of other sites were affected by live weight. The general pattern was a marked dorso–ventral increase in MFD and decrease in FC and SL and a decrease in SL on the neck. The MFD of the mid back site was more correlated with the MFD of the whole fleece than the MFD of the mid-side and the withers sites and may be the preferred site for fleece sampling. There was a significant relationship between log10 FC with MFD and site accounting for 86.2% of the variance. This suggests that variation in FC (fibre crimp) can be used for selection of fleece components with different MFD but the slope of the regression (FC declined 1.0 °/mm for each 1 μm increase in MFD over the range of MFD 11–70 μm) indicates that this will only be detected by eye when there are large differences in MFD. The results indicate that care is needed in sampling alpaca fibre for testing and that farmers should separate alpaca fibre carefully at harvest to keep separate fibre of vastly different commercial value.

    Read the rest of the article: https://www.smallruminantresearch.com/article/S0921-4488(11)00295-1/abstract

  • Wool Brochure

    Author:
    Sheep Genetics

    Date of Publication:
    2005

    Publication:
    Sheep Genetics

    Contents:
    Greasy fleece weight (GFW)
    Clean fleece weight (CFW)
    Fibre Diameter (FD)
    Staple Strength (SS)
    CV of fibre diameter (FDCV)
    Staple length (SL)

    Read the rest of the article: http://www.sheepgenetics.org.au/files/728c3d12-1f97-4bd7-ae76-a4aa00b5274f/SG_DL_Wool_2015_v1.pdf

  • Wool and Alpaca Fibre Blends

    Authors:
    L. Wang, X. Wang, X. Liu
    School of Engineering and Technology, Deakin University, Geelong, Victoria, Australia

    Date of Publication:
    unknown

    Publication:
    unknown

    Excerpt:
    Alpaca fibre has low crimp and smooth fibre surface. This makes the fibre difficult to process, particularly in sliver/fibre transferring and delivering processes. Blending with wool enhances the alpaca fibre processibility, makes the fibre more easily processed on modern wool processing facilities, and allows the development of new products. To evaluate the effect of wool fibre properties, especially wool crimp, on alpaca/wool blends, two alpaca fibre lots were processed to tops then blended with three commercial wool tops via top gillings. Yarns and knitted fabrics were subsequently engineered with identical machine settings. The performance of alpaca/wool blend slivers, yarns and fabrics has been investigated in this paper.

    Read the rest of the article: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.905.1243&rep=rep1&type=pdf

ContactHelp