A Comparison of Yarn Evenness and Imperfection Data

Abstract

The results of testing a large number of rotor yam samples for evenness and imper fections by an instrument operating on capacitance principles are compared with like data produced by a yam monitoring system based on optical methods. The yams vary in the cotton used, type, and linear density. While there is a reasonably good correlation between measures of non-uniformity (CV%), correlations between measures of thick places are improved by accounting for yarn type. The yam diameter data from the monitoring system show that the increase in yarn bulk by using a different combination of machine parameters is constant for a range of yam linear densities. In this study, knitting yarns are 12% more bulky than weaving yarns.

Get full access to this article

View all access options for this article.

References

Corolab "Plus" Version 7 instruction manual, page 8.1.2 (3), W. Schlafhorst AG & Co., Moenchengladbach, Germany.

Corolab Plus, The Electronic System for Yam Monitoring, a brochure published by W. Schlafhorst AG & Co., Moenchengladbach, Germany.

Douglas, K., Ed., The Electronic Yam Clearing Installation, Uster News Bulletin, No. 10, September 1967.

Douglas, K., Ed., The Uster Classimat.System, Uster News Bulletin, No. 11, July 1968.

Douglas, K., Ed., Product Quality Assurance at Automatic Rotor Spinning Machines, Uster News Bulletin, No. 34, February 1987.

Douglas, K., Ed., The Third Generation of Evenness testers, Uster News Bulletin, No. 35, October 1988. p. 4.

Meredith, W.R. Jr., and Price, J.B. , Genetic Association of Fiber Traits with High Speed Rotor Yam Strength, in " Proc. Ninth Annual Cotton Incorporated Engineered Fiber Selection System Research Forum ," Cotton Incorporated, Raleigh, NC, 1996.

The Corolab Plus Optical Yarn Monitoring System, pp. 23, 24, in Autocoro 288; The New Rotor Spinning and Winding System, a brochure published by W. Schlafhorst AG & Co., Moenchengladbach, Germany.