Rheology in Calendering of Thermoplastics

Calendering is a process involving a pair of corotating heated rolls which is fed with a thermoplastic melt for the production of sheet or film. Nearly all models proposed in the literature for this process are based on the simplification of the general equations for the conservation of mass, momentum and energy by making use of the lubrication approximation. Actually, most recent theoretical analyses are extensions of Gaskell’s model [1]. …