Box-Behnken three variables three factors design has been used to optimize the machine spindle diameter, nozzle pressure and yarn delivery speed for achieving the required quality of air vortex polyester/cotton blended yarn. The response surface equations for respective yarn properties in terms of coded factors and significant model terms are developed. Yarn tenacity and elongation show an increase with the increase in nozzle pressure and a decrease with an increase in delivery speed and spindle diameter. Yarn thin places, thick places, neps, U% and hairiness index depict an increase with the increase in delivery speed and spindle diameter, while the decrease is observed with an increase in nozzle pressure. A combination of 1.1mm spindle diameter, 0.5 MPa nozzle pressure and 432.38 m/min delivery speed is the optimized value for targeted yarn quality at 0.71 desirability value.

中文翻译：

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纺纱工艺参数对气流涡流混纺纱性能的影响

Box-Behnken 三变量三因素设计已被用于优化机器锭子直径、喷嘴压力和纱线输送速度，以实现所需的空气涡流涤棉混纺纱线质量。就编码因子和重要模型项而言，开发了针对各个纱线特性的响应面方程。纱线强力和伸长率随着喷嘴压力的增加而增加，随着输送速度和锭子直径的增加而减少。纱线细处、粗处、棉结、U%和毛羽指数随着出纱速度和锭子直径的增加而增加，而随着喷嘴压力的增加而减少。1.1mm 主轴直径、0.5 MPa 喷嘴压力和 432 的组合。