DOI 10.3390/polym14010084 KEYWORDS Kinetic migration; CIELAB parameters; supercritical impregnation; olive leaf extract; UV barrier; impregnation mode ABSTRACT A supercritical solvent impregnation (SSI) technique was employed to incorporate, by batch- and semicontinuous-modes, bioactive olive leaf extract (OLE) into a food-grade multilayer polyethylene terephthalate/polypropylene (PET/PP) film for active food packaging applications. The inclusion of OLE in the polymer surfaces significantly modified the […]