A comparison of yarn irregularity is made between the Pacific Evenness Tester and the cut-and-weigh technique through use of length-variance analysis. It is shown that the Pacific Tester adequately measures short-term unevenness in a worsted yarn. Results for medium-term unevenness are only moderately different from those of the cut-and-weigh method. Long-term unevenness is best measured by the simple cut-and-weigh method used in normal practice.
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References
1.
Anon., Regularity of Tops, Slivers, and Yarns, Wool Sci. Rev.26, 37-54 (1964).
2.
Dyson, E. and Schofield, B., A. NewMethod for Determining the Variance-Length Curve of Yarns and Slivers, J. Textile Inst.59, 528-535 (1968).
3.
Grignet, J., IWTO Experimental Values, 1973, for Short Term Irregularity of Pure Wool Worsted Yarns, Wool Sci. Rev.47, 37-50 (1973).
4.
Martindale, J.G., A. NewMethod of Measuring the Irregularity of Yarns with Some Observations on the Origin of Irregularities in Worsted Slivers and Yarns, J. Textile Inst.36, T35-47 (1945).
5.
O'Connell, R.A. , Martsch, R.J., and Ahrens, F.J., Computer Analysis of the Unevenness of Worsted Strands, AppliedPolym. Symp.18, 1361-1367 (1971).
6.
Onions, W.J. , Pickering, J., and Stables, W., A Comparison of Some Methods of Measuring Yarn Irregularity, J. Textile Inst.41, P480-485 (1950).
7.
Wegener, W., and Egbers, G., Ungleichmassigkeitsuntersuchungen des komprimierten Querschnittes von Faserverbänden, Spinner, Weber, Textilveredlung85, 673-684 (1967).
