INVESTIGATION OF THE EXPANSION BEHAVIOR OF PE-LD FOAMED WITH CO_2

摘要

The combination of PE-LD and CO2 to extrude foamed semi-finished products is widely spread. Especially for the extrusion of foamed sheets the decrease in density and cell size leads to an effect, which reveals a wavy pattern transverse to the machine direction and is known as corrugation. Since this effect has not been investigated yet, it is systematically investigated in a research project at the IKV. The aim of the project is to determine the foaming, process and foam parameters which lead to corrugation and thereafter develop strategies to minimize the corrugation in foamed sheet extrusion.