THEORETICAL ANALYSIS OF T-DIE EXTRUSION

Abstract

The melt behavior of T-die extrusion between the die exit and the chill roll was predicted by using theoretical equations and numerical analysis under various process conditions.
As a result of the theoretical analysis, the take-up stress increased in a linear manner with viscosity, and the activation energy affected the velocity profile and take-up stress. The resins, of which the viscosity decreases with increasing elongational rate were deformed near the roll.
By use of dimensionless analysis, we found a scale-up rule that may set conditions which make the stress constant.