Quality Changes of Cotton Fibres in the Production of Combed Yarn

Abstract

Three types of cotton fibres are investigated: Sudanese cotton »X5B&, Egyptian cotton Giza 69 FG-1/4 and Russian cotton 32/33 mm - first class. A comparison is given of raw cotton, fibres of combed sliver and tops at the same combing preparation and the same percentages of tops on the combing machine. The influence of the same quantity of tops on the change of the the quality of fibres in various types of cotton is investigated. At coarser and more stretched fibres with a relatively even distribution of length and with a law share of short fibres, the influence of the investigated quantity of tops on the improvement of quality is negelc-table. Cotton containig finer and longer fibres, looses in the phase of combing a considerable quantity of long fibres, caused by less stretching and parallelizaton. The conclusion based on the results obtained is, that for a forecast about the quality of cotton combed yarns in the spinning mills ,a checking of fibres from combed sliver is necessary.