The coating compositions were selected based on their efficient processability and repulpablity.
Starch was applied as the main matrix responsible for the plasticity and hydrophilicity of the coatings.
We were able to show that a range of functionalities, such as grease barrier and mineral oil barrier, can be obtained by using renewable and sustainable coating materials.
These materials have the potential to significantly improve the safety of food packaging materials that include recycled fibers in their composition.
the improvements in the barrier coatings will contribute to enabling the industry to safely increase the amounts of recycled fibers used, even in primary food packaging applications.
Additionally, a positive environmental impact will be achieved by decreasing the use
of traditional oil-based barrier coatings and further boosting the industry’s transition toward circular economy and sustainability in production.
In conclusion, these starch-based coatings greatly improved the applicability of paperboard for food packaging and also enhanced packaging safety.