EXPERIMENTAL AND NUMERICAL STUDY OF THE POST-EXTRUSION CONDITIONS IN RIBBON EXTRUSION PROCESS

摘要

The effect of post-extrusion conditions on ribbon deformation was numerically and experimentally studied for the system polystyrene/high density polyethylene (PS/HDPE). A thermomechanical model was used to predict uniaxial deformation under different cooling lengths (X) and draw ratios (DR). The results show that both factors influence substantially the final dimensions of the ribbon. Experimentally, the drawing force was measure online using a system based on a torquemeter principle. For blends, the minor phase deformation was measured using quantitative image analysis. A comparison between the numerical and experimental results produced excellent agreement for our system.