A severe problem with making cotton yarns with the rotor-spinning process is the accumulation of microdust particles. in the rotor. A microscopic method was developed for measuring particle size, enabling statistical treatment of the data. The technique involves taking a small sample of particles, dispersing them on a microscope slide, and measuring size with an ocular micrometer at a magnification of 1250X. It was possible to estimate size with 95% confidence to within less than 1 micron in about 1.25 h.
Get full access to this article
View all access options for this article.
References
1.
American Society for Testing and Materials."Standard Methods of Test for Diameter of Wool and Other Animal Fibers," Method D 2130, Part 33, Philadelphia, Pa., A.S.T.M., 1978.
2.
Barella, A. and Vigo, J.P., Contribution to the Study of the Influence of Turbine Cleanliness on the Properties of Cotton and Blend Open-End Yarns, Textile Res. J.45, 160-168 (1975).
3.
Catling, H., The Economics of Open-End Spinning, in "The Yarn Revolution,"The Textile Institute, Manchester. 1976, pp. 38-47.
4.
Grafton, P.M., Cotton Sliver Preparation for Rotor Spinning Systems, in "Rotor Spinning Technical and Economic Aspects," edited by Dyson, E., The Textile Trade Press, New Mills, Stockport, England , 1975, pp. 23-38.
5.
Heap, S.A., Some Problems and Opportunities for Cotton Spinners, in "Rotor Spinning Technical and Economic Aspects." edited by Dyson, E., The Textile Trade Press, New Mills, Stockport, England, 1975. pp. 1-22.
6.
International Institute for Cotton, "Proceedings of the Dust and Microdust Forum," at the 1978 International Cotton Test Meeting in Bremen, Manchester, I.I.T., 1978.
7.
Kirschner, E. , Fundamental Investigations into Problems Associated with Deposits in Open-end Rotors, Textil Praxis International, Foreign Edition with English Supplement,32, 660-664, 789-792 (1977).
8.
Kirshner, E. and Ray, E., Influence of Sliver Cleanliness and Type of Rotor Spinning System on the Quality of Yarns from Low-grade Cotton, Melliand Textilber. 58, 955-960 (1977).
9.
Kirshner, E. and Ray, E., Assessment of Measures for Reducing the Deposits in the OE Spinning Rotor with the Aid of the Depositing Characteristic Curve, Textil Praxis International, Foreign Edition with English Supplement, 33, 34-39 (1978).
10.
Naarding, W.J. , A New Approach to Microdust Removal to Improve Rotor Spinning Performance of Cotton, Melliand Textilber.57, 609-13 (1976).
11.
Perkins, H.H. , Jr., Handling and Weighing Polyvinyl Chloride Filters in Cotton Dust Measurements, Textile Res. J.45, 25-27(1975).
12.
Schenek, A. , Problem of Fine Dust in Rotor Spinning, Textile Praxis International, Foreign Edition with English Supplement, 33, 40-41 (1978).
13.
Shirley Institute, "Break SpinningShirley Developments Ltd., Manchester, 1968, pp. 144-149.
14.
Simpson, J. , Single Versus Double Carding Effects on Open-End Spinning and Yarn Properties, Am. Textiles Rept. Bull.AT7, No. 9, September 1978.
