Characterization of Jetring yarn structure and properties

Abstract

Jetring is a modifi cation of the conventional ring spinning system and based on the usage of an air nozzle and pressurized air during yarn spinning. This study researched the characteristic properties of Jetring yarns and compared Jetring and conventional ring spun yarn properties. For the Jetring yarn production, three different nozzle types having different injector angles and four different air pressure levels were used. In addition to 30 ° and 45 ° injector angles, which are widely reported in literature, the effect of an angle of 15 ° was also studied. At the end of the study, the differences between Jetring and ring spun yarns were determined. It was found that the Jetring spinning system produces yarns having a hybrid character between conventional ring and air-jet yarns. Additionally, the yarn properties of Jetring yarns highly depend on nozzle structural parameters and air pressure level.

Improvement in yarn hairiness by the siro-jet spinning method

“…This result was explained with accumulating the fibrous mass in short lengths due to wrapping fibers. 5,6,8,9,11,35 In this study, it was also observed that surface fibers are wrapped on to yarn body with different characters. In addition, in the literature, it was also indicated that air-jet yarns comprising the wrapping fibers are also more uneven than conventional ring spun yarns produced without an air nozzle.…”

“…4,6,8,11,13 Therefore, the findings do not agree with each other regarding the tenacity property. On the other hand, protruding hairs are wrapped on to the yarn body by the swirling airflow of Jetring and also siro-jet systems.…”

“…In this study, we used the angles of 15 and 45 due to their better hairiness results determined in the previous studies regarding Jetring and Compact-jet spinning systems. 8,10 The injectors were positioned at 15 and 45 angles with respect to the vertical axis, which is the perpendicular to the nozzle axis, and so they lie tangentially to the main hole of the nozzle. Air entered at the angles of 15 and 45 to the main hole.…”

“…In the Jetring and Compact-jet spinning systems, the aim is to bind the projected fibers onto the yarn body using the swirling airflow in the nozzle and to reduce the yarn hairiness. Many researchers determined that the Jetring and Compact-jet spinning systems are capable of producing yarns with improved yarn hairiness compared to that of the conventional ring spun yarns: [4][5][6][7][8][9][10] hairiness decreased by up to 40-50%. 8,9,[11][12][13] Similar to the spinning process, it was shown that nozzle usage improves the yarn properties; in particular, yarn hairiness decreases significantly after winding.…”

“…Many researchers determined that the Jetring and Compact-jet spinning systems are capable of producing yarns with improved yarn hairiness compared to that of the conventional ring spun yarns: [4][5][6][7][8][9][10] hairiness decreased by up to 40-50%. 8,9,[11][12][13] Similar to the spinning process, it was shown that nozzle usage improves the yarn properties; in particular, yarn hairiness decreases significantly after winding. [14][15][16][17][18] In this paper, considering the effect of an air nozzle on yarn properties, we located an air nozzle on the sirospun spinning machine and the system was named the siro-jet.…”