Investigation of film blowing process stability for metallocene based LLDPE with different level of long chain branching

Abstract

The effect of processing conditions, die design and material characteristics on the stability of the film blowing process has been investigated theoretically by the recently proposed Zatloukal-Vlcek model [Zatloukal M., Vlcek J., J. Non-Newtonian Fluid Mech. 123, p. 201-213, 2004; Zatloukal M., Vlcek J.: J. Non-Newtonian Fluid Mech. 133, p. 63-72,2006] and the theoretical predictions were compared with the corresponding experimental data. It has been found that the model predictions are in good correspondence with the experimental reality.