Application of Air in Yarn Production (Ring-Jet and Air Jet Spinning)
Title Alternative:Application of Air in Yarn Production (Ring-Jet and Air Jet Spinning)
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Date
2010
Authors
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Publisher
Technická Univerzita v Liberci
Abstract
The primary factors influencing the properties and character of staple spun yarns are fiber type and yarn structure. The particular spinning system, each producing yarn of its own distinctive character, determines the yarn structure. The spinning system is in turn dependent upon the manner in which twist is inserted. The recent trend is to use air-jets to insert twist producing yarn of a distinctive, unique structure, consisting of a core and belt or wrapper fibers. Yarn hairiness associated with the longer protruding fibers has been also reduced as a result of this structure. The use of air-jets in the production of yarn therefore has immense potential and is therefore a worthy field of research. An experimental study using compressed air, delivered by an air-jet, to the fiber stream upon exit from the front roller nip, in an attempt to assemble the fibers into a yarn structure, was conducted. The investigation was divided into the following: ? Ring-Jet Spinning Consolidating the fibers after drafting using an air-jet by applying false twist to the fibers, and thereafter applying real twist by a spindle on a conventional ringframe. ? Preliminary investigation into use of air-jets to produce yarn 1. An arrangement of two jets in series with two ancillary fiber tubes. 2. An arrangement of two air-jets in parallel and the third in a series to the first two to produce yarns similar to siro-spun. For ring-jet spun yarns, the influence on the following yarn parameters was determined, viz. yarn hairiness using Uster and Zwiegle testing equipment, yarn evenness and imperfections determined on Uster and yarn tensile properties on the Instron tester, for the ring- jet yarns.
The primary factors influencing the properties and character of staple spun yarns are fiber type and yarn structure. The particular spinning system, each producing yarn of its own distinctive character, determines the yarn structure. The spinning system is in turn dependent upon the manner in which twist is inserted. The recent trend is to use air-jets to insert twist producing yarn of a distinctive, unique structure, consisting of a core and belt or wrapper fibers. Yarn hairiness associated with the longer protruding fibers has been also reduced as a result of this structure. The use of air-jets in the production of yarn therefore has immense potential and is therefore a worthy field of research. An experimental study using compressed air, delivered by an air-jet, to the fiber stream upon exit from the front roller nip, in an attempt to assemble the fibers into a yarn structure, was conducted. The investigation was divided into the following: ? Ring-Jet Spinning Consolidating the fibers after drafting using an air-jet by applying false twist to the fibers, and thereafter applying real twist by a spindle on a conventional ringframe. ? Preliminary investigation into use of air-jets to produce yarn 1. An arrangement of two jets in series with two ancillary fiber tubes. 2. An arrangement of two air-jets in parallel and the third in a series to the first two to produce yarns similar to siro-spun. For ring-jet spun yarns, the influence on the following yarn parameters was determined, viz. yarn hairiness using Uster and Zwiegle testing equipment, yarn evenness and imperfections determined on Uster and yarn tensile properties on the Instron tester, for the ring- jet yarns.
The primary factors influencing the properties and character of staple spun yarns are fiber type and yarn structure. The particular spinning system, each producing yarn of its own distinctive character, determines the yarn structure. The spinning system is in turn dependent upon the manner in which twist is inserted. The recent trend is to use air-jets to insert twist producing yarn of a distinctive, unique structure, consisting of a core and belt or wrapper fibers. Yarn hairiness associated with the longer protruding fibers has been also reduced as a result of this structure. The use of air-jets in the production of yarn therefore has immense potential and is therefore a worthy field of research. An experimental study using compressed air, delivered by an air-jet, to the fiber stream upon exit from the front roller nip, in an attempt to assemble the fibers into a yarn structure, was conducted. The investigation was divided into the following: ? Ring-Jet Spinning Consolidating the fibers after drafting using an air-jet by applying false twist to the fibers, and thereafter applying real twist by a spindle on a conventional ringframe. ? Preliminary investigation into use of air-jets to produce yarn 1. An arrangement of two jets in series with two ancillary fiber tubes. 2. An arrangement of two air-jets in parallel and the third in a series to the first two to produce yarns similar to siro-spun. For ring-jet spun yarns, the influence on the following yarn parameters was determined, viz. yarn hairiness using Uster and Zwiegle testing equipment, yarn evenness and imperfections determined on Uster and yarn tensile properties on the Instron tester, for the ring- jet yarns.
Description
katedra: KTT; přílohy: 1 CD; rozsah: 61 s.
Subject(s)
air-jet, ring-jet, air vortex, spinning, real twist, false twist, wrapper fibers, hairiness, air-jet, ring-jet, air vortex, spinning, real twist, false twist, wrapper fibers, hairiness