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首页> 外文期刊>Journal of Applied Polymer Science >Prediction and Experimental Verification of Bubble and Processing Characteristics in Blown-Film Extrusion
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Prediction and Experimental Verification of Bubble and Processing Characteristics in Blown-Film Extrusion

机译：吹膜挤出中气泡和加工特性的预测与实验验证

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摘要

Blown-film modeling is useful to the flexible packaging industry for predicting process and bubble characteristics, such as freeze line height (FLH), bubble diameter, and film thickness. The use of a suitable rheological equation to describe material properties is critical in simulating the blown-film process. In this article, we present an improved rheological constitutive equation, which incorporates more realistic parameters of stress and deformation properties of the materials by combining the Hookean model with the Phan-Thien Tanner (PTT) model. The proposed PTT-Hookean model is aimed at enhancing the viscoelastic behavior of the melt during biaxial stretching in the blown-film extrusion. Predictions of the blown-film bubble characteristics and FLH obtained with the PTT-Hookean model agreed well with the experimental data of this study and previous studies with different materials and different die geometries. The justification for combining the Hookean model with the PTT model in the blown-film Process is also reported here. (C) 2008 Wiley Periodicals, Inc. J Appl Polym Sci 111: 2657-2668, 2009
机译：吹膜建模对柔性包装行业很有用，可用于预测过程和气泡特征，例如冻结线高度（FLH），气泡直径和膜厚度。在模拟吹膜过程中，使用合适的流变方程描述材料性能至关重要。在本文中，我们提出了一种改进的流变本构方程，该方程通过将Hookean模型与Phan-Thien Tanner（PTT）模型相结合，结合了更逼真的材料应力和变形特性参数。提出的PTT-Hookean模型旨在在吹膜挤出中在双轴拉伸过程中增强熔体的粘弹性行为。通过PTT-Hookean模型获得的吹膜气泡特性和FLH的预测与本研究的实验数据以及以前使用不同材料和不同模具几何形状的研究的实验数据非常吻合。本文还报道了在吹膜工艺中将Hookean模型与PTT模型相结合的合理性。 （C）2008 Wiley Periodicals，Inc. J Appl Polym Sci 111：2657-2668，2009

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