A Study on the Packing Density of Structurally Modified Ring Spun Yarn (original) (raw)
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Effect of spinning variables on packing density of cotton yarn
2014
In this study, fibre distribution through the cross-sections of ring-spun yarns and their packing density values has been investigated to provide a better understanding of the internal structures of ring-spun yarns manufactured by changing different spinning variables. After the yarn manufacturing process, diameter, IPI index, uniformity index, single yarn strength, density and hairiness are tested and then evaluation of tests is done on the Minitab and Microsoft Excel. The impact of TPI, spindle speed, count, hairiness and diameter has been analyzed using yarn packing density as a response variable. The aim of present study is to produce a yarn with improved packing density so that the yarn properties could be predetermined. The study shows that the increase in yarn count, TPI and spindle speed increase the yarn packing density
Effect of spinning variables on yarn packing density
In this study, fibre distribution through the cross-sections of ring-spun yarns and their packing density values has been investigated to provide a better understanding of the internal structures of ring-spun yarns manufactured by changing different spinning variables. After the yarn manufacturing process, diameter, IPI index, uniformity index, single yarn strength, density and hairiness are tested and then evaluation of tests is done on the Minitab and Microsoft Excel. The impact of TPI, spindle speed, count, hairiness and diameter has been analyzed using yarn packing density as a response variable. The aim of present study is to produce a yarn with improved packing density so that the yarn properties could be predetermined. The study shows that the increase in yarn count, TPI and spindle speed increase the yarn packing density
Radial Packing Density of Rotor- and Ring-spun Yarns
1986
The radial packing density of rotor-spun yarn was measured on the basis of the theory reported earlier by the author [J ndian J Text Res, 11 (1986) 26]. The effect of yarn twist and count on the fibre packing density of rotor-spun yarn in comparison with tbat of ring-spun yarn was studied. The packing density of both the yarns over the yarn cross-section was not uniform and increased with yarn twist. In rotor yarn it was higher near the yarn axis and less towards the outer surface of yarn in comparison with that of ring-spun yarn. The packing density of rotor-spun yarn was less than that of ring-spun yarn, which is one of the causes of the lesser strength of rotor-spun yarn. For the same material and twist coefficient, the packing density of coarse yarn was less than that of finer yarn.
It is claimed by different Spinning machine manufacturers that yarn produced by Intimate blending technique by using automatic metering machines is more even throughout the length as well as in transverse direction as compared to Creel blending technique. This thesis has been undertaken to study the aspects of yarn formation processes by either blending techniques and to compare the quality and tensile properties of different counts made by either techniques. Yarn samples are spun at Ring Spinning Frame EMJ 168 with five different counts and twist levels of both techniques. By using UT4, yarn samples are investigated for U%, CV%, Hairiness, Thick &Thin places and Nep The tensile properties of yarn such as Breaking Force, Elongation at break and Tenacity are investigated on UTR4 for single yarn as well as skein. The yarn twist is measured on Twist Tornic code a semiautomated machine. The Solubility test method is used for evaluation of blend ratio of Polyester/Cotton. It is evaluated and observed that Intimate blended yarn gives overall better results. Keywords— Intimate blending, Uniblend (A - 80), Chute feed (A - 70), Fiber Fineness Tester, Yarn Strength and Elongation Tester ,Uster Tensorapid 4, Uster Mass and Hair diagram
Fibre Distribution and Packing in Eli-Twist, SIRO and Ring Spun TFO Yarn
Journal of The Institution of Engineers (India): Series E
In a staple yarn, the composition, distribution and arrangement of fibres can influence its properties. Arrangement and distribution of fibres in a yarn being spinning system dependent, any change in the system causes variation in product performance. Here, an attempt has been made to investigate the fibre distribution in Eli-Twist yarn and it comparison with that of ring spun TFO and SIRO yarn. Yarns of three compositions from cotton and polyester were produced on Eli-Twist, TFO and SIRO spinning systems. Three different counts (39.4, 29.5 and 23.6 tex) from each composition were produced maintaining 40 twist factor for each. Fibre distribution, yarn cross-section, average packing density and number of fibre in yarn cross-section in Eli-Twist yarn were measured and compared with conventional ring spun TFO and SIRO yarn. Migration index helped in identifying the location of fibre in blended yarn. In the polyester-cotton yarn, polyester had a preferential tendency to predominate near the core. Average packing density in Eli-Twist yarn was found to be higher than that of ring spun TFO and SIRO yarn.
Influence of fibre location on properties of Ring and compact yarns
spinning textiles, 2010
Compact spinning is recognized as a breakthrough in ring spinning. This technology is claimed to offer superior quality and better raw material utilization. Although the properties and appearance of compact yarn have been compared with those of conventional ring yarn. In ring spinning the main source of the fibre migration is acknowledged to be the tension differences between fibers during the yarn formation. When a thin ribbon-like fibre bundle is transformed into a roughly circular shape by twist insertion, fibres at the edges of bundle are faced with tension whereas fibres in the middle are subjected to compression unless there is excessive yarn tension. To release the stress, fibres are subjected to tension try to shorten their path length in the yarn whereas fibres under compression try to lengthen it. As a result of this, fibres leave their perfect helical path and migrate between layers of the yarn. In compact spinning, tension differences between fibres during the twist insertion is expected to be smaller than those in ring spinning due to the elimination of the spinning triangle. The present study tries to investigate the migration and other inter related characteristics both in compact as well as ring yarns.
Effect of Blend Ratio on Quality Characteristics of Polyester/Cotton Blended Ring Spun Yarn
Trends in textile engineering & fashion technology, 2019
Cotton is a cool, soft, comfortable and is the principal clothing fiber of the world. Cloths made of this fiber absorb and release perspiration quickly, thus allowing the cloth to "breath." The advantages of polyester over cotton fibers are its strength, brightness, easy-care, low price, consistency in quality and availability. But it has low moisture regain (0.4%) as compared to cotton (8%). There is no perfect fiber that contains all the qualities of cotton and polyester mentioned above. In this context, blending is the technique to combine fibers which emphasizes the good qualities and minimizes poor qualities of the fibers. In blends of polyester/cotton, the fibers provide crease recovery, dimensional stability, tensile strength, abrasion resistance, moisture absorption, drape ability, etc. Different blend ratios of P/C have been considered for experiment, i.e., 100% cotton, CVC (60% cotton, 40% polyester) and PC (50% cotton and 50% polyester). In this work, we studied the yarn characteristics with several P/C blend ratios of 30/s Ne. Here, the properties of blended ring spun yarns are compared with the same of 100% cotton yarn and the results are discussed in terms of the following quality parameters: Mass irregularity (CV% and U%), Thick, Thin & Naps (IPI: Imperfection Index), CSP, single yarn strength and Hairiness.
Industria Textila, 2019
Optimizarea calității firelor filate cu inele produse din fibre celulozice regenerate în amestec cu fibre de bumbac și de poliester Fibrele celulozice regenerate sunt utilizate în principal în amestecurile de bumbac și poliester cu diferite proporții, pe diferite sisteme de filare, pentru a satisface cerințele specifice ale consumatorilor din industria textilă. Acest studiu realizează o analiză a proprietăților și optimizarea calității firelor filate cu inele, cu fineţea de 19,7 tex, din fibre celulozice regenerate Viloft®, ProModal® și bambus în amestec cu fibre de poliester și de bumbac în proporție diferită (100%, 67-33%, 50-50%, 33-67%). Proprietățile firelor, cum ar fi rezistența la tracțiune și alungirea, neuniformitatea, imperfecțiunile și pilozitatea au fost evaluate și comparate pentru a determina influenţa tipului de amestec, tipului de fibră și raportului de amestec. Mai mult, metoda de optimizare numerică a fost dezvoltată pentru a estima parametrii optimi ai calității firelor pentru cele mai bune variabile de răspuns ale următoarelor proprietăți: rezistența la tracțiune și alungirea, neuniformitatea, imperfecțiunile și pilozitatea. Cuvinte-cheie: bambus, ProModal®, fir filat cu inele, optimizarea calității, Viloft® Quality optimization of ring spun yarns produced from blends of regenerated cellulosic fibres with cotton and polyester Regenerated cellulosic fibres are mainly used with the blends of cotton and polyester with different proportion on different spinning systems to meet specific consumer demands in textile industry. This study conducts the properties and quality optimization of 19.7 tex ring spun yarns made from Viloft ® , ProModal ® and Bamboo regenerated cellulosic fibres blended with polyester and cotton at different proportion (100%, 67-33%, 50-50%, 33-67%). Yarn properties such as tensile strength and elongation, unevenness, imperfection index and hairiness were evaluated and compared to determine the effects of blend type, fibre type and blend ratio. Furthermore, numerical optimization method was developed to estimate optimum yarn quality parameters for the best response variables of tensile strength and elongation, unevenness, imperfection index and hairiness properties.
The Journal of The Textile Institute, 2019
In this study, the physical-mechanical properties of ring spun, ring compact, rotor and air-vortex yarns were investigated. The study was carried with yarn having linear densities of 24.4 tex and 36.7 tex, which were then converted to woven fabrics. The ring spun yarns have higher values of strength but also with higher strength irregularities. Extraordinarily low hairiness was observed in air-vortex yarns due to its unique yarn formation technique. The deviation rate (DR) of yarns have correlation with the mass spectrogram of respective yarns obtained from USTER Tester 5. Rotor and air-vortex yarns exhibited higher coefficient of friction. The woven fabrics made from ring spun yarns exhibited higher tensile and tear strength with higher elongation at break. The fabrics made from air-vortex yarns have very good pilling grade due to less protruding fibres on their surface and good structural integrity.