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Instability Phenomena in Film Casting Process
Experimental and Numerical Approaches
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P. Barq
Veröffentlicht/Copyright:
27. Mai 2013
Abstract
This paper deals with instability phenomena in PET film casting. An experimental investigation makes it possible to confirm the occurrence of draw-resonance above a critical draw ratio, and to show interesting coupling effects between thickness and width fluctuations. A theoretical model is developed on the basis of some important assumptions: constant width, vertical film, isothermal regime and Newtonian behavior. It allows to calculate the response to a sudden increase of the chill roll velocity and to predict the critical draw ratio (DR = 20.3). Other types of perturbations of the roll velocity (sinusoidal oscillation, random fluctuations) are also treated using this model.
Published Online: 2013-05-27
Published in Print: 1990-12-01
© 1990, Carl Hanser Verlag, Munich
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Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Innovative Extrusion Systems for Advanced Fiber and Film Extrusion
- Influence of Melting Zone and Melt Homogeneity on Extrusion and Injection Molding Processes
- Further Considerations of Simulation of Flow in Pin Barrel Extruders and in Screw Extruders with Sliced Flights
- Deformation Fields and Residence Time Distributions in Polymer Melt Flows
- Flow History – Morphology Development in Crystallizable Polymer Melts
- Rheological Studies on Solutions of Poly-p-phenylene Terephthalamide in H2SO4
- Instability Phenomena in Film Casting Process
- Influence of Stretching and Cooling Conditions in Cast Film Extrusion of PP Films
- Melt Strength Behavior of PE and its Relation to Bubble Stability in Film Blowing**
- Dynamics of Double Bubble Tabular Film Process for Producing Biaxially oriented Nylon 6 Film
- A Finite Difference Study of Roll Design in Calendering Processing
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- Innovative Extrusion Systems for Advanced Fiber and Film Extrusion
- Influence of Melting Zone and Melt Homogeneity on Extrusion and Injection Molding Processes
- Further Considerations of Simulation of Flow in Pin Barrel Extruders and in Screw Extruders with Sliced Flights
- Deformation Fields and Residence Time Distributions in Polymer Melt Flows
- Flow History – Morphology Development in Crystallizable Polymer Melts
- Rheological Studies on Solutions of Poly-p-phenylene Terephthalamide in H2SO4
- Instability Phenomena in Film Casting Process
- Influence of Stretching and Cooling Conditions in Cast Film Extrusion of PP Films
- Melt Strength Behavior of PE and its Relation to Bubble Stability in Film Blowing**
- Dynamics of Double Bubble Tabular Film Process for Producing Biaxially oriented Nylon 6 Film
- A Finite Difference Study of Roll Design in Calendering Processing
