caa a22 4500 469058331 CHVBK 20180323132850.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/PL00020060 doi (NATIONALLICENCE)springer-10.1007/PL00020060 Perepelkin K. aut Complex evaluation of the quality and serviceability of yarns during preparation and processing processes [Elektronische Daten] [K. Perepelkin] Conclusions: -- The basic factors and principles which determine the stability of processes of preparing and processing yarns have been examined. It has been shown that it is advisable to use the figure for the mean length of a break-free yarn section as a general characteristic for technological stability for yarns of various types and various processes. -- Application of reliability theory shows that the mechanical properties of yarns (load-bearing ability) and technological reserve in mechanical properties (reserve coefficient) have basic importance to ensure stability of technological processes. Thereupon, one should take into account the change in yarn properties under the effect of external actions under the conditions of technological processes. -- The effect of structure heterogeneity and yarn defectiveness on nonuniformity in properties and yarn serviceability in technological processes has been analyzed. -- Various methods of predicting yarn serviceability which are based on evaluating both their breaking characteristics and also of complex quality criteria have been generalized and analyzed. -- New criteria for predicting the serviceability of yarns have been proposed: the scale coefficients of the breaking characteristics for the case of single stretching actions and a complex durability figure for the case of repeated actions of stretching and bending with abrasion. These criteria are particularly important for evaluating the serviceability of yarns with specific mechanical properties. -- The connection between complex quality criteria and the serviceability of yarns with the stability of technological processes (breakage) and the quality of the textile materials obtained has been examined. The author remembers with thanks Prof. A. B. Pakshver, who has helped greatly in discussion of questions about the serviceability of yarns in processes of preparing and processing them. Plenum Publishing Corporation, 1992 Fibre Chemistry Kluwer Academic Publishers-Plenum Publishers 23/2(1992-03-01), 115-133 0015-0541 23:2<115 1992 23 10692 https://doi.org/10.1007/PL00020060 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00020060 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Perepelkin K. aut NATIONALLICENCE 773 0- Fibre Chemistry Kluwer Academic Publishers-Plenum Publishers 23/2(1992-03-01), 115-133 0015-0541 23:2<115 1992 23 10692 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 46839284X BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer