一步法熔体直纺高强度尼龙66工业丝工艺研究

研究一步法熔体直纺高强度尼龙66工业丝工艺技术。通过改进聚合工艺，尼龙66聚合物纺丝相对粘度提高至83～85。优化纺丝工艺参数如下：纺丝箱温度　（300±1） ℃，侧吹风温度　15 ℃，侧吹风速度　0.9～1.1 m·s^-1，上油率　（1.6±0.2）%，牵伸温度　190～195 ℃，牵伸比　5.85～5.95，制得的尼龙66工业丝断裂强度达到91.93 cN·tex^-1。;The one step melt spinning process of high tenacity nylon 66 industry yarn was investigated. The relative viscosity of the nylon 66 polymer increased to 83～85 by stepwise upgrading of the polymerization section. The spinning process parameters optimized were as follows：spinning box temperature　（300±1） ℃，quenching air temperature　15 ℃，quenching air speed　0.9～1.1 m·s^-1，oil loading rate　（1.6±0.2）%，draw temperature　190～195 ℃，and draw ratio　5.85～5.95. The tenacity of nylon 66 industry yarn reached 91.93 cN·tex^-1