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A Preliminary Study on the Effect of Short Fiber Content on Drafting Force and its Variability

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Fiber length is one of the most important factors affecting the drafting force and its variability. By analyzing the draftometer data, the interaction between the dynamic drafting force and its variability with respect to the short fiber content of carded cotton sliver is discussed. Two cotton slivers with similar physical properties, except for their short fiber content (i.e.8.8% and 5.3%) were tested. An increase in drafting force and a decrease in its coefficient of variance (CV%) was noticed for the sample with higher short fiber content. With back gauge increase (from 43mm to 51 mm), the drafting force decreased and its variability increased, irrespective of short fiber content. The inter-fiber cohesion generally decreased, with widened roller settings. It was shown that a broader distribution of fiber length in an assembly of fibers created, more contact points in the strand being aligned by the drafting process. The CV of drafting force increased as we moved from the smaller back ratch to a wider one, which also contributed to sliver irregularity.

摘要

纤维长度是影响其牵伸力及可变性的重要因素之一。通过分析绘图仪的数据,探讨了动态牵引力与可变性之间的相互作用与粗梳棉的短纤维含量的关系。两个短纤维含量不同(即8.8%和5.3%),但其他物理性能相似的棉条经测试发现,随着短纤维含量的增加,棉条牵引力增加,同时变异系数(CV%)减小。在不考虑短纤维含量的情况下,随着边距的增加(从43mm到51mm),牵伸力下降同时其变异性增加,这是由于随着辊距变宽,纤维间的内聚力普遍下降。结果表明,在纤维成形的过程中,纤维长度分布越广,纤维束上的接触点会更多。牵伸力的CV值随着后棘轮直接的增大而增加,这也导致了棉条的不平整。

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Funding

There was no funding for this research work.

Source: https://www.tandfonline.com/doi/full/10.1080/15440478.2020.1727816?af=R

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