Optimization of PE/binder/PA extrusion blow‐molded films. II. Adhesion properties improvement using binder/EVA blends

The second part of this series shows that the incorporation of EVA in the tie layer of extrusion blow‐molded three‐layer (PE/binder/PA) improves the adhesion properties, while reducing the film cost by 6% and preserving the performances previously (Part I) obtained by addition of EVA in the PE layer only, such as optimal improved seal ability, optical properties, and satisfactory mechanical properties. The improvement of adhesion between the binder and the PA layers could be related to a modification of the type and the density of the intermolecular interactions between binder, PA, and EVA.