Active packaging based on PLA and chitosan-caseinate enriched rosemary essential oil coating for fresh minced chicken breast application

•Poly lactic acid film was coated with chitosan or chitosan/sodium caseinate blend enriched with rosemary essential oil.•Addition of 2% rosemary essential oil in coating reduced the water vapor permeability by 25%.•Chitosan/sodium caseinate blend enriched with 2% of rosemary essential oil showed the greatest radical scavenging activity.•Active films reduced the malondialdehyde concentration of chicken meat by 50%.•Samples packed with active films had lower concentration of heptanal and ethanol.