PLA trays with improved barrier properties in MAP packaging for sensitive foods

News_The PLA4MAP project is developing a bio-based, recyclable packaging system that comprises a deep-drawn PLA (polylactic acid) container and a PLA sealing film. For innovative modified atmosphere packaging (MAP), specific oxygen and water vapor permeabilities must not be exceeded.

Any shortcoming regarding the water vapor permeability of the PLA containers can be remedied by applying an additional coating of non-polar materials, such as plant oils and waxes, and by crosslinking the PLA via electron beam (e-beam) treatment. In order to protect oxygen-sensitive foods, there is an integrated oxygen barrier consisting of a bio-based protein layer which is in principle recyclable.

The lid consists of PLA with a transparent inorganic barrier layer which does not hinder recycling of the material. On top of that there is a second laminated PLA film

14may2025

https://www.ivv.fraunhofer.de

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