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首页> 外文期刊>The Journal of the Textile Institute >The components of staple tenacity and the determinants of length after carding
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The components of staple tenacity and the determinants of length after carding

机译：订书钉的韧性成分和梳理后长度的决定因素

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A theoretical model for the tensile strength of staples of wool was used to propose variables that could be measured on thirty six fleece samples from Romney sheep genetically selected on the basis of wool staple tenacity. Other variables that have been noted elsewhere in the literature were also measured. Nearly 75% of the variation in staple tenacity was described by average and minimum cross-sectional area of the fibres, and the relaxed length of the fibres held between the jaws of the instrument used to break the staple. The addition of staple length and variation in total length of the fibres in the staple improved this to almost 84%. The ultimate goal of the genetic selection was to increase the average length of fibres following carding (Hauteur and Barbe), which were also measured on the fleece samples, and the fibre, staple and sample measurements used in stepwise regression to reveal the determinants of length after carding. Variation in Hauteur was dependent on the total energy required to break the staple and the proportion of new tips present in the post-break region of the staple, yet as little as 52% of the variation was accounted for. Average cross-sectional area accounted for a further 3% of the variation in Hauteur but this was not statistically significant. Barbe was dependent on staple tenacity, which accounted for 48% of the variation. In hindsight, staple tenacity may not be an appropriate measure to genetically select sheep in order to improve fibre length after carding given the variables that affect these traits.
机译：使用羊毛短纤维抗张强度的理论模型来提出变量，这些变量可以在根据羊毛短纤维坚韧性进行基因选择的罗姆尼羊的36个羊毛样品上进行测量。还测量了其他文献中已提到的其他变量。短纤维强度变化的近75％是通过纤维的平均横截面积和最小横截面积以及固定在用来切断缝钉的器械的钳口之间的纤维的松弛长度来描述的。短纤维长度的增加和短纤维中纤维总长度的变化将其提高到几乎84％。遗传选择的最终目标是增加梳棉后纤维的平均长度（Hauteur和Barbe），这些纤维也可以在羊毛样品上进行测量，并在逐步回归中使用纤维，短纤和样品测量来揭示长度的决定因素梳理后。 Hauteur的变化取决于折断钉书钉所需的总能量以及钉书钉断裂后区域中出现的新笔尖的比例，但仅占52％的变化。平均横截面积占Hauteur变化的3％，但这在统计上并不显着。芭比依赖钉书钉的坚韧性，占钉书钉坚韧性的48％。事后看来，考虑到影响这些性状的变量，主食韧度可能不是通过遗传选择绵羊以提高梳理后纤维长度的合适方法。

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