Computer Simulation of Multi filament Air Jet Melt Spinning
Computer Simulation of Multi filament Air Jet Melt Spinning
复制标题
多丝喷气熔融纺丝的计算机模拟
DOI：
10.3139/217.890091
复制
发表时间：
1989
影响因子：
1.3
通讯作者：
H. Ikeuchi
中科院分区：
文献类型：
--
作者：
H. Ishihara;S. Hayashi;H. Ikeuchi
摘要从理论和实验两方面研究了多丝体系的喷气熔融纺丝工艺。考虑单个纺丝线周围的空气温度和冷却流速度，导出了描述喷气熔体纺丝多丝系统的基本方程。对不同纺丝条件下的喷气熔体纺丝基本方程进行了数值计算。得到的稳态解给出了纺丝横截面积、纺丝温度、纺丝张力和纺丝速度。这些被描述为从喷丝器向下测量的距离的函数。对特征黏度为0.61的聚对苯二甲酸乙酯（PET）进行了喷气熔融纺丝实验。纺丝参数的变化主要有输送量、喷丝点到顶射器的距离和顶射器内的气压。最终纺丝速度或纺丝旦的理论值与实验值具有较好的相关性。此外，利用计算得到的弹射点拉伸速度可以估计出纤维的分子取向。结果表明，多丝喷气纺丝过程的模拟程序对于确定工业纺丝过程中适宜的纺丝条件和评价纤维性能具有重要的实用价值。
Abstract Air jet melt spinning for multifilament system was studied both theoretically and experimentally. Basic equations describing the multifilament system of air jet melt spinning were derived by considering air temperature and velocity of cooling flow surrounding the individual spinlines. Numerical computations of the fundamental equations for air jet melt spinning were carried out for various spinning conditions. Steady-state solutions obtained give the spinline cross sectional area, spinline temperature, spinning tension and spinline velocity. These are described as a function of the distance measured downward from the spinneret. Air jet melt spinning experiments were conducted for poly-(ethyleneterephthalate) (PET) having an intrinsic viscosity of 0.61. The spinning variables were changed mainly in terms of throughput, distance from spinneret point to ejector and air pressure in the ejector. Good correlations between theory and experiment were obtained for the final spinline speed or as-spun fiber denier. Further, the molecular orientation of asspun fiber can be estimated using the computed stretching speed at the ejector point. It was found that the simulation program of multifilament air jet spinning is very useful in finding the appropriate spinning conditions for the industrial spinning process and in estimating fiber properties.