Multilayer packaging was developed in the mid-20th century to overcome the performance limits of single-layer materials.[3] An early example is the aseptic carton introduced byTetra Pak in the 1960s, combining paperboard, polyethylene, and aluminium foil.[3] In the 1970s and 1980s, multilayer films were adopted for vacuum pouches and heat-stable bags. By the 1990s, advances in lamination and coextrusion made them widely used in the food and pharmaceutical industries.[4]
Example of multilayer food package with barrier layers
Multilayer systems are widely used forfood preservation because they block oxygen, light, and moisture. EVOH is often used as an oxygen barrier, while polyolefins provide moisture resistance.[6] Another application ismodified atmosphere packaging (MAP), which replaces air with controlled gases such as nitrogen or carbon dioxide to slow microbial growth.[7]
Multilayer packaging is difficult to recycle because of its mixed-material structure. As of 2018 less than 5% was recycled at scale, with most waste incinerated or landfilled.[9] Possible approach include solvent-based separation, compatibilizers, and enzymatic depolymerization of PET.[10]
^Tamizhdurai, P.; Mangesh, V. L.; Santhosh, S.; Vedavalli, R. (2024-04-01). "A state-of-the-art review of multilayer packaging recycling: Challenges, alternatives, and outlook".Journal of Cleaner Production.447 141403.Bibcode:2024JCPro.44741403T.doi:10.1016/j.jclepro.2024.141403.
^Alreshidi, Maha Awjan; Yadav, Krishna Kumar (2025-07-01). "Advancements in the production methods and recycling of multilayer plastics with sustainable applications: A comprehensive review".Chemical Engineering Journal.515 163633.Bibcode:2025ChEnJ.51563633A.doi:10.1016/j.cej.2025.163633.
