Structure and properties of Vortex yarn
Title Alternative:Structure and properties of Vortex yarn
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Date
2010-01-01
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Technická Univerzita v Liberci
Abstract
The goal of this dissertation was to investigate the influence of technological parameters including the spindle diameter, yarn delivery speed, main draft and yarn fineness on the structure and properties of Vortex yarn. The investigation was based on yarns comprising 100% viscose with different fineness (from coarser to finer yarns),delivery speed ,spindle diameter and main draft. Geometrical properties(ribbon length, ribbon diameter and ribbon angle) of the yarns were investigated using Image analysis, which was used to capture and process images of the yarns. Ribbon length was used to estimate the amount of twist and twist coefficient of the and ribbon angle was used to calculate twist intensity. The yarns mechanical properties(tensile strength, hairiness, evenness and yarn imperfections) were investigated on the investigated using Uster Tester 4 and yarn hairiness was also investigated using Zweigle G567.Statistical analysis was used to investigate the normal distribution,95% confidence interval(upper and lower limit) and mean values. The properties of the yarn were analyzed in relation to twist coefficient. The results shows that delivery speed and spindle diameter have influence on ribbon twist and twist coefficient. Twist has significant influence on the diameter and ribbon angle of the yarn. Higher speed and larger spindle diameter yield yarns with better evenness and strength compared to yarns produced at low speed and smaller diameter. However yarns High twist increases ribbon angle.
The goal of this dissertation was to investigate the influence of technological parameters including the spindle diameter, yarn delivery speed, main draft and yarn fineness on the structure and properties of Vortex yarn. The investigation was based on yarns comprising 100% viscose with different fineness (from coarser to finer yarns),delivery speed ,spindle diameter and main draft. Geometrical properties(ribbon length, ribbon diameter and ribbon angle) of the yarns were investigated using Image analysis, which was used to capture and process images of the yarns. Ribbon length was used to estimate the amount of twist and twist coefficient of the and ribbon angle was used to calculate twist intensity. The yarns mechanical properties(tensile strength, hairiness, evenness and yarn imperfections) were investigated on the investigated using Uster Tester 4 and yarn hairiness was also investigated using Zweigle G567.Statistical analysis was used to investigate the normal distribution,95% confidence interval(upper and lower limit) and mean values. The properties of the yarn were analyzed in relation to twist coefficient. The results shows that delivery speed and spindle diameter have influence on ribbon twist and twist coefficient. Twist has significant influence on the diameter and ribbon angle of the yarn. Higher speed and larger spindle diameter yield yarns with better evenness and strength compared to yarns produced at low speed and smaller diameter. However yarns High twist increases ribbon angle.
The goal of this dissertation was to investigate the influence of technological parameters including the spindle diameter, yarn delivery speed, main draft and yarn fineness on the structure and properties of Vortex yarn. The investigation was based on yarns comprising 100% viscose with different fineness (from coarser to finer yarns),delivery speed ,spindle diameter and main draft. Geometrical properties(ribbon length, ribbon diameter and ribbon angle) of the yarns were investigated using Image analysis, which was used to capture and process images of the yarns. Ribbon length was used to estimate the amount of twist and twist coefficient of the and ribbon angle was used to calculate twist intensity. The yarns mechanical properties(tensile strength, hairiness, evenness and yarn imperfections) were investigated on the investigated using Uster Tester 4 and yarn hairiness was also investigated using Zweigle G567.Statistical analysis was used to investigate the normal distribution,95% confidence interval(upper and lower limit) and mean values. The properties of the yarn were analyzed in relation to twist coefficient. The results shows that delivery speed and spindle diameter have influence on ribbon twist and twist coefficient. Twist has significant influence on the diameter and ribbon angle of the yarn. Higher speed and larger spindle diameter yield yarns with better evenness and strength compared to yarns produced at low speed and smaller diameter. However yarns High twist increases ribbon angle.
Description
katedra: KTT; přílohy: 1 CD; rozsah: 74 s.
Subject(s)
vortex yarn structure and properties, spindle diameter, yarn delivery speed, yarn fineness, image analysis, twist coefficient, ribbon angle, twist intensity, tensile strength, hairiness, evenness, yarn imperfections, statistical analysis, vortex yarn structure and properties, spindle diameter, yarn delivery speed, yarn fineness, image analysis, twist coefficient, ribbon angle, twist intensity, tensile strength, hairiness, evenness, yarn imperfections, statistical analysis