Abstract
This paper has had as purpose rendering of some researches related to extrusion velocities while obtaining multilayer films with superior barrier and antimicrobial properties, of five layers of polymer with ionomer content, including antimicrobial. An installation comprising five extruders has been used for trials and the working velocities have been determined for each layer, as well as the shear stress at the wall of the nozzle. The results thus obtained made possible to settle the optimum parameters for the extrusion process able to ensure a stable flow of the molten polymer, which resulted in a uniform multilayer, faultless structural film, with superior barrier and antimicrobial effects. Keywords: polyethylene, EVA, EVOH, extrusion, co-extrusion, multilayer film