Study On The Properties Of Polynosic Air-Jet Spining Yarn

This article mainly contains the study of the properties of Polynosic air-jet spinning yarn. As a kind of new spinning methods, the efficiency of air-jet spinning is ten times higher than that of traditional ring spinning. Polynisic is a kind of regenerated cellulose fiber with high tension and modules. It also has good dyeing properties and ability of mercerization. Its outstanding apparel properties can meet the needs of modern consumption trend. But it doesn't take much time to attempt new methods of spinning. The purpose of this article is to combine new methods of spinning with qualified regenerated cellulose fiber, so that its structure and properties can be understood.Firstly, it shows the relationship between spinning process parameters and yarn properties. Among lots of parameters, two of them were selected, second nozzle pressure and yarn count. Then, 18 kinds of yarn were tested for the analysis of yarn tension, evenness, hairiness and bending rigidity.Secondly, polyester/cotton, polyester, cotton air-jet spinning yarns were chosen to compare the properties with those of Polynosic air-jet spinning yarn.Thirdly, the comparison of Polynosic yarns in different spinning methods was proceeded.The conclusions are as below:1 ^ With the increase of the second nozzle pressure, the yams have increased tension and bending rigidity, decreased hairiness. It doesn't cause obviously influence on the evenness. In the aspects of the yam tension and bending rigidity, Polynosic locates between Tencel and viscose. The hairiness of Polynosic air jet spinning yam above 3mm is better than that of Tencel and viscose.2^ Between two kinds of yarn counts, the finer yarn and the higher yam tension, the better bending rigidity. But for Polynosic, its tension is on the reverse. The finer yarn has worse yarn evenness.3> In all air jet spinning yams, polyester/cotton yarn has the highest tension. Regenerated cellulose yams are the second. The lowest is the cotton yarn. In the aspect of hairiness, regenerated cellulose yam and polyester/cotton are very close. Cotton yam has seriously hairiness. As for bending rigidity, regenerated cellulose yarn is the best.4> Among various methods of spinning, the tension of Polynosic air jet spinning is the lowest. Ring spinning is better than that. And the best one is sirofil spinning. Polynosic air jet spinning shows better results than two other spinning methods in yarn evenness, hairiness, resistance of abrasion. There still exists an unavoidable problem that the bending rigidity of Polynosic air jet spinning is not satisfactory. It requires further study.