Browsing by Author "Vyšanská Monika"
Now showing 1 - 6 of 6
Results Per Page
Sort Options
- ItemBehavior of Two And Three-fold Twisted Multifilament Yarns(Slovak University of Technology in Bratislava, Faculty of Chemical and Food Technology Technical University of Liberec, Faculty of Textile Engineering, 2018) Moučková Eva; Mertová Iva; Vyšanská Monika; Hajská Šárka
- ItemComplex description and measurement of two-ply yarn transversal proportions(SAGE PUBLICATIONS LTD, 2016) Vyšanská Monika
- ItemEvaluation of the Areal Textile Thinning(ACAD SCI CZECH REPUBLIC, INST THERMOMECHANICS, 2014) Stříž Bohuslav; Vyšanská Monika
- ItemImage analysis and description of single jersey loop geometry(Technical University of Liberec, 2016) Vyšanská Monika
- ItemImage analysis and description of single jersey loop geometry(2017) Vyšanská Monika
- ItemINFLUENCE OF TWIST ON SELECTED PROPERTIES OF MULTIFILAMENT YARN(AUTEX, Technical University of Lodz,, 2018) Mertová Iva; Moučková Eva; Neckář Bohuslav; Vyšanská MonikaOwing to twisting of filament fiber bundle, the structure and consequently various parameters and properties of a fiber bundle are changed. The aim of the work is to verify the effect of multifilament yarn twist (or twist coefficient) on selected mechanical properties such as multifilament tenacity, breaking elongation, and coefficient of fiber stress utilization in the yarn. Furthermore, the influence of twist on structural parameters such as the angle of peripheral fibers, the packing density, and the substance cross-sectional area of fiber bundle is observed. Two multifilament yarns with different filament cross-section shape and material were used for the experiment. Experimentally obtained data was compared with the known model dependencies derived decades ago based on the helical model. It can be stated that multifilament yarn retraction can be predicted based on the angle of peripheral fibers using the Braschler’s model. The coefficient of fiber stress utilization in the multifilament yarn determined experimentally corresponds with a theoretical curve, constructed according to Gégauff and Neckář, in the area of Koechlin’s twist coefficient α > 54 ktex1/2 m−1. Results as well as possible causes of deviations of experimental data from the theoretical one are discussed in this work.