fatigue of cotton and viscose staple yarns by biaxial rotation over a pin

an investigation is reported on the fatigue life of open-end, ring spun, and siro spun yarns using the technique of biaxial rotation over a pin. open-end yarns have a significantly higher fatigue life compared to ring spun yarns. mercerization increases fatigue life. for siro spun yarns, an increase in strand spacing increasing the fatigu..

evaluation of fiber and yarn from three cotton fiber mutant lines

analysis of the biochemical factors required for improved cotton fiber growth is aided by a collection of near isogenic mutants. the cotton mutants (gossypium hirsutum l. texas marker-1 background) tested in this study include immature fiber, pilose, and naked seed. fiber physical properties for each mutant were determined for two years o..

critical evaluation of the relationship between fiber quality parameters and hairiness of cotton yarns

a certain level of hairiness in yarn is generally acknowledged as unavoidable because of the practical limitations of mechanical processing machines. spinners therefore interested to know the effect of fiber properties on yarn hairiness when selecting suitable raw materials. the literature on parameters such as fiber fineness and short fi..

global excesses in primary textiles

this paper discusses the global cotton-yarn and end-use fiber production over capacity and traces the origins of the uncomfortable situation into which we have manoeuvred ourselves and to see what conclusions we can draw from the findings

modifier for viscose technical yarn based on cotton soapstock acids

a new domestic modifier for viscose technical yarn has been synthesized - amiprin khs-20, based on distilled fatty acids from cotton soapstock. specimens of viscose technical yarn have been prepared under the conditions of an experimental unit, using amiprin khs-20 modifier. the properties of the yarn obtained are close to those of yarn s..

air-jet texturing of spun cotton yarns for improved comfort part ii. texturability of carded spun yarns compared to combed spun yarns

we have studied the importance of yarn structural variants such as fiber packing density, fiber fineness and length distribution, mean fiber extent, and migration parameters in deciding the bulking potential of a spun yarn structure with air-jet texturing. three variants of carded yarns, combed yarns, and yarns made from combed sliver whi..

ultimate tensile properties of normal and modified wool

the ultimate tensile properties have been determined for a wool yarn before and after chemical modification as a function of temperature, strain rate, and regain. under the conditions prevailing at failure, wool behaves viscoelastically, the breaking stress and breaking strain each varying with the test conditions. applying the wlf equati..

surface roughness measurement with optical fibers

the paper discusses development of a new method of surface roughness measurement utilizing optical fibers. two general types of fiber-optic roughness measurement are presented: intensity-based and polarization-based which require use of either multimode or single-mode polarization-preserving optical fibers. some configurations, including ..

physicochemical properties of sized yarns - part i: initial studies

in the reported experiments, several methods were explored for characterizing sized yarns and size films in order to establish relationships that might be useful in predicting weaving performance a variety of natural and synthetic sizes were applied to cotton and to polyester/cotton spun yarns in a laboratory sizing apparatus although yar..

improved accuracy with the shirley analyzer

the shirley analyzer is the instrument usually used to determine the nonlint content of cotton stock and processing waste samples. in the reported study, an improved accuracy in shirley analyzer results was obtained by modifying the standard analysis procedure, including a reconditioning period before final weighing of specimen fractions,..