Influence of Spinning Parameters on Vortex Spun Yarn Properties

Topics: Yarn, Arithmetic mean, Fiber Pages: 6 (3183 words) Published: September 27, 2008
What is Vortex Spinning?
Vortex spinning can be viewed as a refinement of jet spinning, or a natural development in fasciated yarn technology. An entirely new technology “to spin yarn with the vortex flow of compressed air” created VORTEX; a quite new type of yarn. As in all other fasciated yarns, the structure of vortex yarn consists of a core of parallel fibers held together by wrapper fibers. The main difference between the air jet and vortex yarn is the number of wrapper fibers which is much higher in vortex yarns. In air jet spinning, only the edge fibers become wrapper fibers. In vortex spinning, on the other hand, the fiber separation from the bundle occurs everywhere in the entire outer periphery of the bundle. It is very likely that during yarn formation the leading part of the fibers will not be able to escape from the false twist penetrating upwards and eventually become located in the core. The trailing parts, on the other hand, will not receive twist and become wrapper. In VORTEX spinning, the tip of the fiber is focused to the center of the yarn by the vortex of compressed air so that the center of the yarn is always made straight without twisted. The other tip forms the outer layer that twines another fiber. This technology is not applied to any limited material, but produces the VORTEX yarn with a unique structure through VORTEX spinning regardless of materials. Vortex spinning has too many advantages, such as high production speed up to 400 m/min, better yarn properties like “ring-like” structure, low hairiness, reduced fabric pilling, better abrasion resistance, higher moisture absorption, better color-fastness and fast drying.

Which parameters affects to the yarn structure?
There are several parameters that affects to the yarn structure. They are nozzle angle, nozzle pressure, spindle diameter, yarn delivery speed and distance between the front roller and the spindle. Basal and Oxenham are made an investigation, and in that study, they changed these parameters one by one and observed the results on the yarn structure. They noticed that little differences in these parameters makes great differences on the yarn structure. They used cotton fibers with an upper half mean value of 1.44 and micronaire value of 3.4 for the study. Test Results

Nozzle Air (kg/cm^2)Speed (m/min)FR to SP (mm)Sp Type (mm)Nozzle TypeCVm%Thin PlacesThick PlacesNepsHairinessTenacity (gf/den)Elongation 4.535020.51.26513.450154222.54.1752.226.05

4.535020.51.27013.450130192.53.842.2056.19
4.538020.51.26513.42501892094.8552.2256.15
4.538020.51.27013.6250.5178.51774.262.26.31
4.535020.51.36513.450.5148.5218.54.712.2656.47
4.535020.51.37013.42511322144.0952.1856.45
4.538020.51.36513.750.5205211.55.362.156.55
4.538020.51.37013.4750163.51944.72.186.64
4.535019.61.26513.2152931833.7852.266.28
4.535019.61.27012.375055146.53.6252.176.26
4.538019.61.26513.380151.5184.54.242.346.29
4.538019.61.27012.315084.51463.9552.2156.66
4.535019.61.36513.2751901594.182.266.34
4.535019.61.37012.415065169.53.8352.226.59
4.538019.61.365Spinning Was Not Possible
4.538019.61.37012.42088142.54.282.166.67
535020.51.27013.6851152.51983.672.26.57
535020.51.26513.4401652053.9252.1556.45
538020.51.27013.40.51911764.012.176.09
538020.51.26513.540.52012034.5252.265.83
535020.51.37013.501241593.9352.0856.67
535020.51.36513.120138195.54.0952.236.85
538020.51.37013.52511871884.332.216.22
538020.51.36513.330148204.54.9952.176.32
535019.61.27012.360591513.532.036.47
535019.61.26513.145096177.53.622.2156.31
538019.61.27012.3088139.53.7452.1956.13
538019.61.26513.270141175.54.0052.215.95
535019.61.37012.5063.51713.7152.21...
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