Modeling of non-isothermal film blowing process by using variational principles

Abstract

A recently proposed model of the film blowing process (Zatloukal and Vlcek [1]) was generalized and consequently applied to the case of high-stalk tubular film blowing of HMW-HDPE. It was found that the proposed model has a good capability to describe and predict the relevant experimental data. In the second part of the paper, a non-isothermal version of the film blowing model is developed and tested. Finally, a novel version of the generalized Newtonian model is proposed, which allows one to take into account the effect of extensional melt rhelogy.