Influence of yarn formation process on properties of bamboo pulp fiber colored spun yarn using air jet vortex spinning

For further increasing the variety of air jet vortex spun yarn and enhancing the processing efficiency of the conventional color spun yarn,experimental schemes were designed by Box-Behnken method. The software Minitab 16 was introduced to analyze the influence of process parameters of air jet vortex spinning on properties of bamboo pulp fiber colored spun yarn. Research results showed that the influence of yarn formation process on the tenacity of bamboo pulp fiber colored yarn spun based on air jet vortex spinning is rather complicated,in which,the effect of yarn delivery speed and yarn linear density on the yarn tenacity depends on the change of nozzle pressure. The evenness of the colored yarn is affected principally by yarn delivery speed and yarn count. Increasing yarn delivery speed makes yarn's evenness value decrease first and then increase. However,decreasing yarn linear density will significantly deteriorate yarn evenness. Yarn hairiness is influenced mainly by nozzle pressure and yarn delivery speed,and more yarn hairiness exhibits when decreasing nozzle pressure and increasing yarn delivery speed. Yarn diameter is affected primarily by nozzle pressure and yarn count. Enhancing nozzle pressure and decreasing yarn linear density result in obvious decrease of yarn diameter.