Experimental studies on the development of a cast film
Experimental studies on the development of a cast film
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流延薄膜开发的实验研究
DOI：
10.1002/pen.20291
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发表时间：
2005
影响因子：
3.2
通讯作者：
C. D. Carlson
中科院分区：
文献类型：
--
作者：
B. Seyfzadeh;G. Harrison;C. D. Carlson
演员阵容电影制作过程具有重大的工业意义。这项工作提供了定量的实验结果，以表征在模具出口和激冷辊之间的区域的薄膜浇注操作。所使用的聚合物熔体是一种商用聚酯样品，具有剪切和拉伸主导流动的特征。在模头和激冷辊之间的整个区域内逐点测量油膜温度和局部速度。虽然应变率随着聚合物从口模移动到冷轧辊而降低，但缝隙中的速度是增加的。对于特定的轴向位置，速度在薄膜边缘附近显著降低。模具和冷轧辊之间的温度有小幅下降(∼20°C)，最大的变化再次发生在薄膜边缘附近。实验结果由实验装置的温度场、速度场和几何形状之间的耦合来解释。波兰姆。英语。SCI。45：443-450,2005.©2005塑料工程师学会。
The cast film process is of significant industrial interest. This work presents quantitative experimental results for the characterization of a film casting operation in the region between the die exit and the chill roll. The polymer melt employed is a commercial PET sample that has been characterized in both shear and extension-dominated flows. Pointwise measurements of both the film temperature and the local velocity are made over the entire region between the die and the chill roll. The velocity increases in the gap, although the strain rate decreases as the polymer moves from the die to the chill roll. For a particular axial position, the velocity decreases significantly near the edges of the film. There are modest (∼20 °C) decreases in the temperature between the die and the chill roll, with the greatest variations again occurring near the edges of the film. The experimental results are explained by the coupling between the temperature, velocity fields, and geometry of the experimental apparatus. POLYM. ENG. SCI. 45:443–450, 2005. © 2005 Society of Plastics Engineers.