The significance of fiber variability in the spinning of wool blends
For pure wool yarns, fiber variability is limited to dimensional variations only and its effect on yarn performance is, in general, relatively small compared with the means. For wool blend yarns, however, the variability arises from two sources: the dimensional changes, e. g. fiber diameter, and the differences in fiber properties, e. g. fiber tensile properties, bending rigidity and surface properties. As a consequence, the variability could have significant impact on the processing performance and the resulring yarn quality. A formula has been derived for the prediction of fiber variability in wool blends. Special attention has been paid to demonstrate that the formula holds even if fiber property measurement is fiber length dependent. The formula shows that fiber property variance for a blend yarn with two constituent fibers depends not only on the variances of the two fibers, but also on the differences between the means of the fiber property of the two fiber types. Spinning trials have been carried out at CSIRO. The observed fiber variability in wool blend yarns fits well with the prediction. The spinning trial results have demonstrated that the large fiber variability resulting from blending wool with fine denier polyester cancels out, to a great extent or all together, the benefits of improved yarn quality, which might be expected from the reduced mean diameter. In many cases, the blends with finer mean diameter have resulted in poorer yarn quality and spinning performance than the blends with coarser mean diameter. Findings from this study have practical implications for the industry as far as optimising wool blend yarn quality is concerned.
fiber variability wool blends spinning prediction
Yang Shouren
CSIRO Textile and fiber Technology, PO Box 21, Belmont, 3216, VIC Australia
国际会议
2006中国国际毛纺织会议暨IWTO羊毛论坛(2006 China International Wool Textile Conference & IWTO Wool Forum)
西安
英文
127-136
2006-11-19（万方平台首次上网日期，不代表论文的发表时间）