Technological solutions to reduce the geometrical defects during the cast film processReport as inadecuate




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1 CEMEF - Centre de Mise en Forme des Matériaux 2 Laboratoire des Matériaux Industriels Polymères

Abstract : The polymer cast film process induces some geometrical defects : the width reduction neck-in defect and the inhomogeneous decrease of the thickness distribution edge bead defect. These defects prevent from predicting the film final dimensions and thus from a high industrial productivity. In this paper, a numerical model developed by the authors is used to test and optimize two technological solutions, aimed at reducing the geometrical defects : a localized air cooling on the edges of the film at the die exit and an -encapsulation die- which enables the extrusion of a high melt strength polymer along the outer edge of a core polymer. Numerical results are confronted with experimental investigations





Author: Cyrille Sollogoub - Yves Demay - Jean-François Agassant -

Source: https://hal.archives-ouvertes.fr/



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