Non-isothermal viscoelastic numerical model of the cast-film process

The cast-film process is widely used to produce synthetic (polymer) film for a large range of applications. Two geometrical defects contribute to decrease efficiency of this process: the width reduction (necking defect) and the inhomogeneous decrease of the thickness distribution (edge bead defect)....

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Bibliographic Details
Published in:Journal of non-Newtonian fluid mechanics 2006-10, Vol.138 (2), p.76-86
Main Authors: Sollogoub, C., Demay, Y., Agassant, J.F.
Format: Article
Language:English
Subjects:
Applied sciences
Cast-film process
Engineering Sciences
Exact sciences and technology
Machinery and processing
Materials
Miscellaneous
Numerical model
Plastics
Polymer films
Polymer industry, paints, wood
Technology of polymers
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Summary:The cast-film process is widely used to produce synthetic (polymer) film for a large range of applications. Two geometrical defects contribute to decrease efficiency of this process: the width reduction (necking defect) and the inhomogeneous decrease of the thickness distribution (edge bead defect). In this paper, a numerical simulation of the process is performed to predict these defects. A membrane approximation is used to reduce the equations to a 2D model. The polymer flow is non-isothermal (heat transfer coefficient is discussed) and a viscoelastic constitutive equation is accounted for.
ISSN:0377-0257
1873-2631
DOI:10.1016/j.jnnfm.2005.11.011