纺丝组件砂腔中流体流动性的冷态模型研究

自制冷态模型实验装置,针对熔融纺丝组件中的流体流动特征进行研究。实验结果表明:利用葡萄糖浆溶液作为PA6熔体的模拟介质是可行的,糖浆粘度与PA6熔体粘度有相似的变化规律及一定条件下粘度值相近,糖浆粘度随着剪切速率的增加而出现剪切变稀现象;在温度为21℃时,糖浆粘度与265℃时PA6熔体粘度接近,表明常温下,用糖浆作为模拟介质是可行性的;通过模拟介质在透明纺丝组件中流动特性的研究表明:流体在纺丝组件的砂腔中流动并不是理想的平推流,在压盖下方物料停留时间较四周长,不利于物料性质的均匀性。此研究实验结果为优化纺丝组件奠定了一定的基础。

Cold Simulation Experimental Study of Fluid Flow Characteristics of the Melt Spinning Assembly

The refrigeration state simulation equipment was be established,to research the fluid flow characteristics in spinning assembly.The results show that:the use of glucose syrup solution as PA6 melt the analog medium was feasible,syrup viscosity PA6 melt viscosity was similar to the viscosity values under certain conditions and variation similar syrup viscosity with increasing shear rate appears shear thinning phenomenon;the viscosity of syrup at a temperature of 21℃ was close to viscosity of PA6 melt at 265℃,the syrup as an analog medium was feasible.Flow characteristics in a transparent spinning assembly through the analog medium show:,fluid flow in the spinning pack sand in the chamber was not ideal plug flow,the residence time of the gland below the material than four weeks long,was not conducive to the uniformity of material properties.The results of this study to optimize the spinning pack to lay a certain foundation.