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. Rotor yarn is also called open end yarn & Rotor yarn is widely used yarns in Denim production. The air-jet-spun yarn structure consists of core fibers without significant twist and covering fibers with a genuine twist, which ultimately produces the corresponding yarn tenacity. The study is carried out on rotor yarn with same material ,same count and same conditions. Low flexibility. Rotor yams subjected to a tensile drawing process, as reported in Part I, not only differ from their original form in terms of yam structure, but also in bulk, mechanical, and surface properties. The specific yarn structure results in yarn tenacity between that of a ring-spun yarn and that of a rotor-spun yarn. I. Winding ( yarn package building): The properties of ring-spun and rotor-spun yarns and of the fabrics woven from these yarns have been compared. The main object of the project is to study the yarn properties (Um%, CVm%, Imperfection, Hairiness etc) of ring, rotor and air-jet spun yarn and compare among them. Dye ability is easy and more than ring spun. 2.1. 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. The Spun Yarn offers a revolutionary new way to get honest, safe targeted beta reader or sensitivity reader feedback from 3 readers. A mottled appearing yarn having a main strand of fibers and wrapper fibers of different color than the main strand. The yarn to yarn and yarn to guide roller friction was measured at different sliding speeds and tension ratios. A rotor spun yarn has . such as feeding, opening, centralizing and twisting process. Several studies have been reported on the effect of rotor speed on yarn properties. The yarn tension variability is dependent on the yarn mass variation, that is, count variation. Uniform with more strength than rotor spun. Therefore, this work probes the possibility of eliminating these drawbacks by using tensile drawing. Cotton yarn. Structure of Ring Frame Yarn Packages; Yarn Twist; Yarn Structure; Process Control in Ring Spinning; New Spinning systems. Open-end spinning, on the other hand, is a system of spinning where the yarn is twisted by rotating at the hap or break in the flow (the fibers wrap around the yarn v. spinning one long piece of yarn). The characteristics of yarn differ depending on the type of material used to create the yarn. What are the common cotton yarns? Polyester spun yar n and cotton spun yar n is widely used in the furniture and pharmaceutical industries. The forming yarn rotates at high speed compare to other rotating elements. For this purpose, different yarn samples (100% PES) were produced under different operating conditions. An analysis of packing density shows that the fibers for the rotor yam are located most densely near the yam center, while the friction yam has the highest density of fibers near the yam surface. However, for polyester fibres, the rotor spun yarn showed highest friction, followed by friction and ring spun yarns. Higher flexibility than ring spun. Rotor spun yarn, despite its growing popularity, suffers the disadvantages of lower tenacity, limited count range, and harsh handle of the resulting fabrics. The specific yarn structure results in yarn tenacity between that of a ring-spun yarn and that of a rotor-spun yarn. One of the key pieces of yarn information for the development and manufacture of denim is the choice of yarn size. Advantages of friction spinning system. Wrapper fibres (WFs) and their formation mechanisms, as well as their effects on the pro perties of open-end rotor spun yarns, have been investigated. The fibres are twisted together by the spinning action of the rotor, and therefore the yarn is continuously drawn from the centre of the rotor. The highest wrapper fiber ratio of the three yarn types was obtained from MVS yarns. Open-End Spinning; Rotor Spinning-I; Rotor Spinning-II; Friction Spinning ; Air Jet Spinning; Vortex Spinning Strength of ring spun yarn is higher than rotor spun yarn whereas strength of air jet yarn lies b etween ring and rotor y arn. The rotor-spun yarn has a three-part structure, with a relatively dense core (80-90% of fibers), a loose but a continuous sheath that wraps around the core (5-20% of fibers) and tightly wound surface coils as wrapper fibers (0.5-2% of fibers). No wrapper fibers were observed in the ring spun yarn structure. Rotor spun yarns are more even.somewhat weaker and have a harsher feel than ring spim yams. While it was once seen only as a defect, slub yarn is now intentionally created to give fabric more personality. [10] 2. Latest Rotor Spin Box Technology Our reader network spans the globe. The core fibers were helically embedded into the yarn. The fiber configuration in the rotor yarn is not nearly parallel as in the ring yarn. Free PDF. The rotor spinning machine R 70 with the improved spinning box and optimized BYpass enables more cost-effective raw materials with a higher noil or trash content to be spun into a high-quality yarn. Its yarn structure optimizes the characteristics of its component fibers. We have produced 20's Ne, 100% cotton yarn from the above systems and their properties are tested by UT5 and lea strength tester. mechanization of yarn spinning took place over the period 1738 to 1825 to meet the huge rise in the demand for spun yarn resulting from the then-spectacular increase in weaving production rates with the invention of the flying shuttle (John Kay, 1733). Ring spun yarn can also be made softer as a result of the lower levels of twist that can be used to form the yarn in comparison with rotor spun yarn. Normally rotor yarn is coarse. A higher migration factor corresponds with a higher yam breaking tenacity. So what are the specifications of cotton yarn? PDF. Spun yarn consists of short, staple fibers woven together to create a single yarn to be used in weaving, knitting projects, and clothing manufacturing. - Ijtsrd. ... work investigates the influence of rotor spinning process parameters on the twist difference values of 100% polyester rotor spun yarns. 100% desirability satisfaction can be achieved for specific yarn quality parameters by process optimization, following USTER ® benchmarks, at a rotor speed of 77,800 rpm and 700 twists per meter [35]. The specifications of cotton yarn are different, and the uses of cotton yarn are also different. The production rates of rotor spinning is 6-8 times higher than that of ring spinning and as the machines are fed directly by sliver and yarn is wound onto packages ready for use in fabric formation. It can carry out the spinning process. Download with Google Download with Facebook. Part I – Rotor spun yarn. Title of Legally Binding Document: Textiles - Rotor spun grey cotton yarn Number of Amendments: Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New--Jawaharlal Nehru Invent a new India using knowledge.--Satyanarayan Gangaram Pitroda spun yarn synonyms, spun yarn pronunciation, spun yarn translation, English dictionary definition of spun yarn. The cotton fiber usually is just over an inch long. Rotor spun yarns are more even, somewhat weaker and have a harsher feel than ring spun yarns. These yarns are made coarser to medium and medium to finer. n. A lightweight line made of several rope yarns loosely wound together, used for seizings onboard ship. Pairs of rollers were introduced The greater bulk (diameter) of the rotor-spun yarn compared to ring-spun yarn resulted in greater crimp, fabric thickness, crease VORTEX yarn is spun with a unique technology. Yarns used in denim fabrics are termed “short-staple spun yarns,” because they are formed from fibers having a staple length of less than 2.5 inches. PDF. The usual length of the staple of any kind, such as wool, ramie, or any type of synthetic fiber for spinning should be less than 7”. 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]. A Study on Properties of Modified Rotor Spun Yarn. It is simply necessary to pull this yarn out of the rotor via yarn compensation bar by means of take-off rollers and wind it up on a winding drum into the cross-wound package. Dye ability is less than open end yarn. This yarn can be formed from short fiber. Uniform but less strength than ring spun. Rotor speed. The yarn is a lot cheaper to produce. Yarn that is spun intentionally to achieve an irregular shape, in terms of length and diameter. Rotor speed is an important parameter as it affects productivity of the machine. or. Download Free PDF. 1. The fabrics produced from drawn rotor spun yams are no doubt affected by these changes. Rotor Spun yarns found with frequent breakage during knitting [6] and more irregular than ring yarn [34]. Rotor Spun Yarn. Spun yarn is usually very fuzzy, providing the wearer with warmth. Yarn Tension in Ring Spinning; Spinning Balloons; Compact spinning; Forces acting on the traveller; Ring Spun Yarns. This paper presents a report on changes in fabric characteristics. The yams are produced with different specifications from the … Spun yarn is a kind of yarn made by gathering together a bundle of the staple by spinning the spindles at a very high speed to twist the staples together to form a piece of yarn. The yarn is produced by feeding longer and coaser fibers with shorter and finer fibers in an open end rotor spinning machine and controlling the operation to accentuate wrapper fiber formation with the longer and coarser fibers. Ring-spinning, which is a system of spinning using a ring and traveler take-up, twists and winds the yarn simultaneously and continuously. The spinning wheels unit quality can directly effect the quality of spun yarn. A yarn is thus spun continuously. We offer a 32-page manuscript critique within 30 days!