Physical and thermal comfort properties of viscose fabrics. Changes in cotton noncellulosic content during the. Rieter k44 pneumatic compact spinning system was used in the production of pneumatic compact yarns. Yarn countsliver hank yarn count is the numerical expression of yarn, which defines its fineness or coarseness. Cn102517721a full melange yarns produced by vortex. Therefore, it can be concluded that 3640 ne is the limit for spinning pure carded cotton yarns in a vortex spinning system. Spinning is the twisting together of drawn out strands of fibers to form yarn. Ring, rotor and air vortex spinning systems provide yarn with different structures and properties. Chen, in specialist yarn and fabric structures, 2011. Yarns play an important role in the fabric manufacturing process since a majority of the textile materials are constructed with yarns.
Many methods may be encountered with during the development of airjet spinning process. The process takes a fiber mass roving, reduces the mass through fiber drafting, inserts twist for strength, and winds the yarn onto a bobbin. Because the yarn is a relatively small component, any more reliable conclusion requires visual aid. Air vortex spinning free download as powerpoint presentation. Even today, ring spinning makes the widest range of yarn counts with the highest strength. Yarn made out of staple fiber is known as spun yarn, because the staple fibers should undergo number of process stages so that a yarn can be made out of them. Spinning is the single most costly step in converting cotton fibres to yarn. Fibers formed by these air flows possess a unique structure, and this provides the yarn with a wide range of functionalities.
Pdf vortex spinning can be viewed as a refinement of jet spinning, or a natural development in fasciated yarn technology. Historical trends in us yarn production have also been surveyed, and the combined information obtained is used as an indicator of the future directions in this key industry. The spinning process and the yarn structure obtained as a result create new. This process employs an airjet to rotate the fibre strands and twist them into a yarn. We used 100 % combed rovings which were used in the first part of the study. Since, most of the nonfibrous materials on raw cottons are presumed to be surface related, there is the potential for the levels to be altered as a result of passing fibers through different stages of yarn processing. Openendrotor spinning an overview sciencedirect topics.
Optimization of spinning parameters influencing the. The polypropylene spun yarn is higher the fineness been shown to decrease the breaking strength and elongation. There are many processes and machines involved in converting a fibre to yarn. The structure and properties of vortex and compact spun yarns. In openend spinning, yarn is produced directly from sliver. Physical properties of polypropylene blended yarns with. Comparison of conventional ring, mechanical compact and. The success of murata vortex spinning mvs system which is the newest system after all studies of airjet systems has been much acceptable especially for the spinning ability of 100% cotton in high speeds 500 mmin and the yarn structure resembling ring yarn structure rather than rotor yarns. The rotation of the strand causes the fibers to adopt helical forms and increase the number of turns of twist. Spinning is the process of conversion of textile fibers and filaments into yarns for weaving or knitting into fabrics. These kinds of systems are known as the vortex yarn spinning systems. This paper analyzes the relationship between technological parameters of spinning of 100% cv vortex yarns of different counts and its selected geometrical parameters a lead of helix of wrapping fibre ribbon, yarn diameter as well as yarn properties. In this chapter, we shall consider the basics for developing an understanding of the spinning process details which are described in the subsequent chapters. Principle of operation the basic principle of operation is shown in figurs 1 and 2.
Vortex spinning process principle of vortex spinning. Comparitive studies on ring rotor and vortex yarn knitted fabrics rameshkumar c. The breaking strength of polypropylene spun yarn blended with rayon and acrylic was higher than that of 100% polypropylene spun yarn. All designated fiber types are found in vortex yarn such as wild fibers, belly band fibers, parallel and. In this study, the physical and thermal comfort properties of viscose fabrics made from ring and vortex yarns have been studied to explore the impact of spinning process on fabric properties. A revolutionary idea, spin yarn with the vortex flow of compressed air created vortex, a new concept in staple yarn. Loose fibers are dyed to obtain colored fibers, and the colored fibers are subjected to drawing and vortex spinning to obtain the full melange yarns. Spinning is the most important and the initial step in fabric manufacturing. Ring spinning is the oldest type of fiber spinning still in use. As in all other fasciated yarns, the structure of vortex yarn consists of a core of parallel fibres held together by wrapper fibres. Vortex spinning can be viewed as a refinement of jet spinning, or a natural development in fasciated yarn technology. In vortex spinning, one end of each fiber is anchored in the center of the yarn such that the center of the yarn is always without twist. Vortex spinning can be viewed as a modification or refinement of jet spinning, and compact spinning is an enhancement of traditional ring spinning. This procedure or process stages in correct sequence is called spinning.
The present study provides a window into the vortex spinning technology, but further research needs to be conducted to establish a process structureproperty model for vortex yarns. Spinning method and the product continuity is maintained during the whole spinning process. Air jet spinning has offered yarn manufacturers the opportunity to produce yarn at relatively high production rate. The full melange yarns are stable and high in quality, short in process. In vortex spinning, the dynamic behavior of the fiber inside the nozzle, which involves fiberairflow interaction and fiberwall contact, plays an important role in the twist insertion process. An overview on spinning mechanism, yarn structure and. The invention discloses full melange yarns produced by vortex spinning and a process of producing the full melange yarns, which belong to the technical field of textiles. The airjet spinning methods have been developed since it is possible to eliminate the movable elements as the spindle and the traveler in ring. Currently, over 85% of the worlds yarn is produced on ring spinning frames, which are designed to draft the roving into the desired yarn size, or count, and to impart the desired amount of twist.
Airjet spinning is one of the new spinning techniques that can produce corespun yarns. Vortex spinning comparison report number 19991 were conducted in the late 1990s, which clearly show the quality relationships among mvs, ring, and rotorspun yarns and the resultant. The vortex spinning machine spins yarns in a unique way using an air vortex which was developed and is manufactured only by murata i msc tmtosavs 3 machinery. In the twist insertion process of spinning a staple yarn, a strand of fibers is held on one end while the. Textile spinning process of cotton yarn textile learner. The structure and properties of carded cotton vortex yarns. Again, the process of spinning varies between natural and synthetic fibres as discussed in chapter 1. Yarn is a generic term for a continuous strand of textile fibers, filaments, or material in a form suitable for knitting, weaving, or otherwise intertwining to form a textile fabric. This is believed to be caused by the relatively small differences between the levels of these parameters used in the trials. The amount of twist is proportional to the strength of the yarn. I msc tmtosavs the structure of vortex yarn compared to other yarns vortex yarn has a twopart structure. Vortex spinning is able to create various types of yarn, optimizing the properties of each material in the yarn structure. Vortex spinning systems provide yarn with different structures and properties. The present research focuses on identifying those structural differences which can be used to explain the properties of these newer yarns.
In the twist insertion process of spinning a staple yarn, a strand of fibers is held. Its yarn structure optimizes the characteristics of its component fibers. Murata vortex spinners are one such leading air jet spinning machines which excel at producing finer yarns ne 401601, because of the improved strength imparted to the smaller fibre bundle. Yarn engineering is the process of constructing yarn using procedures designed to change its properties. In the twist insertion process of spinning a staple yarn, a strand of fibers is held on one end while the strand length is made to rotate on its axis. Although ring spinning is predominantly used, other techniques of yarn manufacturing such as airjet spinning have emerged owing to simplification of process. The process of making yarns from the textile fiber is called spinning. Airjet spinning of cotton yarns cotton incorporated. Effects of some process parameters on the structure and. The other fiber end forms the outer yarn layer in a true twist arrangement. Yarn spinning is the process of manufacturing yarn from different types of fibres into a continuous length from one or more type of fibers.
In this article, we are going to know about the various processes which lead to the formation of worsted spun yarns. The purpose of yarn engineering is to optimize the performance and minimize the cost of textile products through the process of selecting the most effective raw materials, fiber type, manufacturing method, and yarn structure 1 yarn is a versatile fiber used in fabricmaking. Study of the stress relaxation property of vortex spun yarn in. Compared to yarn spun using other spinning processes, airjetspun yarn displays the lowest hairiness. Introduction to spinning process online clothing study. But goetzfried method is the first method where the airjet flow is used. Yarn production, spinning, vortex spinning, centrifugal spinning. The yarn obtained with this method has a carrier almost without twist, which is braided on the yarn surface. Vortex spinning system and vortex yarn structure intechopen. There are various types of spinning methods for producing various types of yarn. The main object of the project is to study the yarn properties um%, cvm%, imperfection, hairiness etc of ring, rotor and airjet spun yarn and compare among them. On the other hand, frequency of breaks increases in finer yarns.
Comparative study on the properties of vortex and ring spun yarn. As a first step in such study, a piece of vortex yarn was untwisted and viewed under the scanning electron microscope. With a spinning yarn count of 40 ne, the frequency of breaks started to increase, and with a count of 45 ne, spinning became more difficult. Vortex spinning system and vortex yarn structure request pdf. The bending properties of polypropylene spun yarns were in the order of ppapprpp40pp30ppw. Our shop located in taos, new mexico, highlights natural fibers like wool, alpaca, mohair, silk, bamboo, tencel, and hemp, as well as superwash wools and antipilling acrylics. Process control and yarn quality in spinning woodhead. We observed how yarn properties are changed with the change of process. This twisting motion tends to flow upwards towards front rollers of the drafting unit. There are many methods or mechanisms for spinning such as ring spinning, rotor spinning, airjet spinning, friction spinning and air vortex spinning. Studying the yarn formation with the swirling air concept arouse of interest of the researchers for a long time because it appears to be easy to understand as a spinning principle. Murata vortex spinning, vortex spun yarn, stress relaxation.
These systems, air jet and vortex, use compressed air currents to stabilize the. The major goals of spinning is to produce the quality yarn from raw material, then remove the process faults followed by winding the short length bobbins on cones. This can be simply revealed by untwisting a vortex yarn by hand. Other spinning systems have also eliminated the need for roving, as well as addressing the key limitation of both ring and openend spinning, which is mechanical twisting. Yarn structure is primarily determined by the spinning process. This is a process in which a filament or staple yarn is fed behind the front roll of the drafting system and covered or wrapped with. If we notice, we will see that the cotton fiber s are converted into carded yarn, combed yarn and rotor yarn.
714 207 820 420 198 1459 1036 1342 988 302 962 1527 574 802 717 91 69 246 187 419 1541 569 17 522 1503 347 1124 1200 1047 533 534 640 808