摘要
根据纺丝动力学原理(主要是传热系数)详尽地讨论了纤维不对称结构的形成机理,并建立数学模型.通过计算机编程进行模拟,得到丝条沿纺程的速度场、温度场、应力场和纤维截面的温度场.结果表明:在卷绕速度为3000m/min、泵供量为0.033g/s·孔时,纤维截面的温度最高点与最低点差值的最大值为8.87℃,导致的应力最大差值为116.7Ncm^2;泵供量对纺丝成形、不对称结构形成的影响较大;而卷绕速度是影响纺丝成形的主要因素,对不对称结构影响不是很大.
The mechanism of the unsymmetrical structure formation was discussed in detail ,according to the dynamic theory of melt spinning. The mathematical model was developed and simulated by computer.Then, the speed, temperature and stressprofiles along the spinning line were established, as well as the temperature distribution at different cross sections. It is shown that the maxim temperature difference at cross section is 8.78℃, when the take-up speed is 3000m/min and the pump capacity is 0.033g/s·h.Meanwhile,the maxim stress differ-ence is 116.7N/cm2 .It is clear that the pump capacity affects the spinning and unsymmetrical structure formation.However,the take-up speed is one of the main factors affecting the spinning formation, but it has little effect on the unsymmetrical structure formation.
出处
《合成纤维》
2000年第5期5-9,22,共6页
Synthetic Fiber in China
