Effect of different swirl nozzle airway structures on performance of ring-spun yarn

In order to research the effect of different airway structures of a swirl nozzle on reducing yarn hairiness,two groups of swirl nozzles with different airway diameters and airway positions were designed in this paper.The comprehensive performance indexes of yarn were tested and conducted for comparison with the conventional ring spinning and compact spinning.The results showed that the swirl nozzle with1.4 mm airway diameter was superior to the other two swirl nozzles with airway diameter of 1.2 mm and1.6 mm,respectively.Airway position of 1∶ 2 is better than 1∶ 1 and 2∶ 1.Thus the optimum conditions to reduce yarn hairiness include swirl nozzle with 1.4 mm airway diameter,1 ∶ 2 airway position,and pressure of 0.15 MPa.Under this condition,compared with that conventional ring spun yarn,the hairiness index was reduced by 76.5%,and breaking strength was increased by 5.4%.Compared with that of compact spun yarn,the hairiness index was reduced by 64.4%,and breaking strength was decreased by 4.0%.As a result,the effect on reducing hairiness was remarkable.