Measurement of Filament Temperature and Analysis of Orientation-induced Crystallization Behavior in High-Speed Melt Spinning Process
Measurement of Filament Temperature and Analysis of Orientation-induced Crystallization Behavior in High-Speed Melt Spinning Process
复制标题
高速熔体纺丝过程中长丝温度的测量及取向诱导结晶行为分析
DOI：
10.4325/seikeikakou.1.333
复制
发表时间：
1989
期刊：
影响因子：
--
通讯作者：
J. Shimizu
中科院分区：
文献类型：
--
作者：
T. Kikutani;Y. Kawahara;Takayuki Matsui;A. Takaku;J. Shimizu
在高速熔融纺丝工艺中，对沿纺丝线沿着的长丝温度的测量提供了关于运行的长丝的冷却行为和结晶行为的信息。通过同时测量红外辐射强度和灯丝直径来分析灯丝温度。所确定的经验公式的运行灯丝的冷却的评价预测一个更慢的冷却速率比从Kase和松尾方程得到的。当卷绕速度为6 km/min时，聚对苯二甲酸乙二酯纺丝线的直径分布在距纺丝线140- 150 cm处出现颈状变形，温度分布在变形结束后出现最大值。该温度增量反映了由分子取向引起的结晶热。根据温度和直径分布估算的纺丝线结晶速率，在温度约为100 ℃时。160°C和0.108的双折射率是各向同性状态的105倍。结果表明，在高速纺丝过程中，颈状变形结束后结晶迅速进行。
The measurement of the filament temperature along a spinline in a high speed melt spinning process provides information on the cooling behavior and crystallization behavior of running filament. The filament temperature was analyzed through simultaneous measurements of infrared radiation intensity and the diameter of the filament. The determined empirical formula for the evaluation of the cooling of the running filament predicts a slower cooling rate than that obtained from the Kase and Matsuo equation. The diameter profile for a poly (ethylene terephthalate) spinline at a take-up velocity of 6km/min showed a so-called neck-like deformation at 140-150cm down from the spinneret, and the temperature profile showed a maximum just after the end of the deformation. This temperature increment reflects the heat of crystallization induced by molecular orientation. The rate of crystallization in the spinline, which is estimated from the temperature and diameter profiles, at a temperature of ca. 160°C and birefringence of 0.108 is 105 times greater than that of the isotropic state. It is suggested that crystallization proceeds rapidly just after the end of the neck-like deformation in a high speed spinning process.