PLA‐Derived High‐Barrier Slow‐Release Antibacterial Film: Industrial‐Scale Preparation and Enhanced Preservation of Salmon

·24 h]) and robust mechanical properties (tensile strength: 27.32 ± 5.12 MPa; elongation at break: 72.15 ± 11.22%). The β-CD@CAR complex provided controlled CAR release, imparting strong antibacterial activity (reductions of 1.88 and 2.01 log CFU/g against Staphylococcus aureus [S. aureus] and Escherichia coli [E. coli], respectively). When applied to salmon preservation, the film effectively delayed microbial growth, pH increase, color deterioration, quality loss, and protein oxidation, extending shelf life by at least four days. This work demonstrates a scalable strategy for active packaging by integrating a multilayer barrier with a cyclodextrin-mediated release system, showing significant industrial potential for preserving perishable, high-fat foods. Notably, the film was fabricated via industrially viable melt-extrusion and thermal lamination. This scalable approach, combined with the tailored multilayer architecture, represents a significant advance towards practical active packaging.