40 Ne cotton yarns were produced with the slivers manufactured at different flat speeds such as 240, 260, 280, 300 and 320 mm/min. The effect of these alterations on yarn strength is discussed with particular focus on seed coat fragments (SCF), one of the primary cotton contaminants from the fiber to the finished product. Neps not only adversely affect the appearance of cotton yarns and fabric but are also usually associated with lower yarn strength, ends down in spinning and less-uniform yarn. under commercial yarn counts and twist factors, in order to reduce the cost of production and to be economical for the popular fabrics. Cause of neps and trash and controlling measures in carding procedure[J]. The woolen spinning process makes a warm and cozy yarn due to the On the other hand yarn imperfection (neps, thick and thin places) which is another parameter considered as parameter of yarn quality. These products are made with the utmost care to ensure the end products are smooth, delicate and rigid enough to sew or knit into garments and other end-products. The neppy yarns give raise to problems like breaking of needles in sewing and Yarn imperfection of rotor spun yarn affects fabric quality significantly. Cotton Textile Technology, 1999, 27(11): 35-37. and imperfections of yarns caused from higher card speed resulted in the decrease in yarn strength. neps), short term evenness (u%), and strength of yarn are influenced by the changes in bottom roller gauge setting, affect the quality of the yarn. Carded Yarn: Carded yarn is the worst quality type of yarn. Three different travellers were then used at each of the two spinning speeds to produce 42Tex yarn. The fluorescent neps are in polyester. ITO Karei is outstandingly soft, as mule spinning creates the highest quality yarns. Neps are associated with poor yarn and ultimately with poor fabric appearance and have an effect on yarn uniformity and dyeing quality. The actual reductions are determined by the fiber as well as the design, settings, and maintenance of the machines. Ring spun yarn has retained its position as the system that produces the strongest, finest, softest and most lustrous yarn and fabric. Over the range of values examined here for short fiber content and neps, there were no significant changes in yarn quality values with the new technology. A reliable analysis of these imperfections will provide some reference to the quality of the raw material used The standard sensitive levels are as follows : Thin place: -50% Immature Neps: Generally This type of yarn does not contain any short fiber and neps. Customers can do cotton portion dyeing to get the effect in the yarn. The effect of neps on yarn cost is twofold: (1) neps must be largely removed before yarns can be produced, (2) residual neps can be detrimental to the appearance and the value of yarn. For the rotor spun yarn, the negative effect on the yarn uniformity of the shorter fibers is limited. From table 2, it was also observed that after 8 hours of heat setting imperfections/km in yarn found more or less equal to before heat setting yarn. Following variables were selected to study their effects on yarn quality parameters. Eccentric cylinder and doffer will affect the U% and will affect C.V.% also. Their filaments and properties differ from each other. Neps may also interfere with economical spinning and may possibly YARN EVENNESSYarns of different quality levels result in fabrics of distinctlydifferent quality levels, leading to problems in processing orvariations in final value (of the fabric / garment).These differences impact on prices and affect the costs andprofitability of both fabric & apparel This is especially true as the yarn count becomes finer (diameter decreases), since it becomes increasingly difficult for the seed coat neps to become hidden in the yarn structure. 1. The cotton neps would cosiderably mar the appearance of the fabric, particularly those dyed in contrast shades, in case of Polyester Cotton suiting. The yarn is woolen spun on a mule spinning system. For example, yarn quality at each spinning position is monitored by yarn clearers, such as the Uster Quantum Clearer [20]. Many published papers have discussed the reuse of recovered fiber in spinning system. The number of readings for tenacity and evenness was 200 and 8 respectively. The study revealed a relationship between the blend ratio and the NEPS 200% in the yarn per km. Compared with conventional core yarn, significant decrease in thick, thin and neps is marked for the compact core yarn. places (+50%)/km + Neps (+200%)/km] (For ring yarn). These results serve to (2.75 mm), respectively. neps in card sli ver and yarn quality. This study investigates the effect of the blend ratio on recycled blended yarn quality characteristics. Combed yarns are superior in quality when compared to carded yarn as they are generally finer, stronger, smoother and more uniform due to the removal of short fibers and the There is an inverse nature of NEPS (200%/km) with the increase in polyester proportion in the blend, which is shown in Figure 4. Moreover, the yarn is imported on a paper cone, so in order to make it coloured the paper cone must be replaced by a plastic cone. But the fibers between 1.75 and 2 inches exhibit the highest correlation with the yarn CV%. If the yarn appearance is poor, the fabric appearance will also be poor. 6.5 According to the distribution of For number of thick places, the rate of increase varies from 6% to 24% and for the number of neps it is from13 to 29%. Thus, the recommended tension for the yarn plays a very important role and has a great effect on the yarn quality. Improper feed roller loading and the setting between feed roller and feed plate will affect the quality, especially C.V% and neps. Results and Discussion The effect of fibre length on yarn quality isobvious from the data given in Table l. Initially, there is an increase in yarn tenacity as the fibre length increases the number of passages has a significant effect on the quality of the reclaimed fibers. The main emphasis of this project work is to find out the effect of fiber length on yarn quality for achieving the Ring-spun yarns of linear density of 23.6, 29.5 and 39.4 tex were produced from five blend proportions of recycled polyester and cotton (0:100, 33:67, 50:50, 67:33 and 100:0). To evaluate the impact of different combing seg ments (half laps) in comber on smaller size neps in comber sli ver and yarn quality. The effect of these alterations on yarn strength is discussed with particular focus on seed coat fragments (SCF), one of the primary cotton contaminants from the fiber to the In unginned cotton, biological neps neps. yarns desirable characteristics. Biological neps are neps that contain foreign material, whether the material is seed coat fragments, leaf, or stem material (Figure 1) (Hebert, 1988). investigated the effect of yarn structure and yarn count on the properties thick place (+50%), thin place (-30%), and neps (+200%) of elastic core yarns The fibre physical properties can be influenced by non-cellulosic and metal contents present in it which ultimately may impact the quality and spinning performance of Indeed, there was an increase of the Neps count and the ratio of short fibers (SFC). The main object of this work is to produce better quality yarn. 2. The concentration of these materials largely depends upon cotton variety, growing area and atmospheric conditions. Yarn was prepared by using two spinning speeds, 6500 rpm and 9500 rpm. gauge has been set in seven positions within the carding region and concluded that they slightly reduce the number of neps and short fibres in the carded slivers which further improve the yarns produced. The imperfections i.e., thick place (+50%), thin place (-30%), and neps (+200%) of elastic core yarns produced in conventional and compact spinning are exhibted in Figure 8(a), 8(b) and 8(c), respectively. In addition, the larger the diameter of the fiber, the more it resists bending or collapse, leaving more space between the fibers for holding liquids. The yarn is woolen spun on a mule spinning system. Cotton Textile Technology, 2005, 33(6): 39-41. The superior quality neps yarn available on the site are made from materials such as wool, acrylic, polyester and cotton which impart unique desirable characteristics to the blend. Imperfections/km in yarn increased after heat setting compared to before heat setting yarn due to moisture absorption Effect of Sliver Handling on Quality of Sliver and Yarn. Chapter 5 provides Over the range of values examined here for short fiber content and neps, there were no significant changes in yarn quality values with the new technology. ITO Karei is outstandingly soft, as mule spinning creates the highest quality yarns. Imperfections/km in yarn increased after heat setting compared to before heat setting yarn due to moisture absorption which was found in table 2. The amount of nep in the yarn not only affects the appearance quality of the yarn and the grey cloth, but also directly affects the dyeing effect of An evaluation of the effect of yarn count on hairiness shows that the hairiness values of the Ne 60 yarns are the lowest whereas Ne 30 yarns are the lowest. Normally, this type of yarn contains more neps and more short fiber. 1. Machine types which are having varied needle strength hook sizes and dial and trying to monitor neps. If the yarn appearance is poor, the fabric ITO Karei is a gem in the ITO collection: 100% grade A Mongolian cashmere with a tweed effect of little colored neps. Some people dont worry about neps and allow them to form to add texture to their yarn, but A good yarn should lack those neps. Effect of polyester/cotton blend ratio on NEPS 200%/ km Figure 4: Effect of polyester/cotton blend ratio on NEPS 200%/Km. Effect of polyester/cotton blend ratio on NEPS 200%/ km. For retaining their maximum original parameters they require different types of sliver handling systems. Yarn Evenness and ImperfectionsBy : Ravikeerthi Rao; 2. YARN FAULTS Effect on Quality ( Cntd) Neps Apart from the strong influence on the optical appearance of textile surface structures, neps from a certain size upwards also Before mounting , the eccentricity of cylinder and doffer should be checked. The higher micronaire fiber is desired for purified cotton, since its easier to purify and forms less neps during processing. Mixed Neps: Fibers tangle around a foreign materials. For instance Grit. The yarn is woolen spun on a mule spinning system. Even though the cards are feed with the Moreover, the yarn is imported on a paper cone, so in order to make it coloured the paper cone must be replaced by a plastic cone. We conducted a 2-year study in 2018 ITO Karei is outstandingly soft, as mule spinning creates the highest quality yarns. Apr 13, 2022 - ITO Karei is a gem in the ITO collection: 100% grade A Mongolian cashmere with a tweed effect of little colored neps. The removal of neps represents a The draw frame machine is the last Jun 2, 2021 - ITO Karei is a gem in the ITO collection: 100% grade A Mongolian cashmere with a tweed effect of little colored neps. The quality of hosiery yarn has to be considered with due weight-age to fluidity of knitted structures and their influence on knit fabrics quality. Because the neps and impurities in the raw strip directly affect the yarn nodules and fabric defects, the movement of the fibers during the drafting process in the parallel, coarse and fine Contaminants in cotton fibers cause yam regularity defects that alter their structure. The harmfulness of neps. The purchaser should always keep in his mind that the effect of the yarn appearance is directly reflected on the fabric surface. This paper presents the results of an experimental study showing that, in certain cases, the presence of An Overview on the Spinning Triangle Based Modifications of Ring Frame to Reduce the Staple Yarn Hairiness By Dr. Hosne Ara Begum Comparing Quality Parameters of Yarn Produced by