Multilayer Sheets Based on Double Coatings of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) on Paper Substrate for Sustainable Food Packaging Applications

This work reports on the development and performance evaluation of newly developed paper sheets coated, both sides, with thin films biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) for applications food packaging. For this, PHBV/paper/PHBV multilayers were first prepared by thermo-sealing technique, optimizing process variables temperature time. Thereafter, multilayer characterized in terms their morphological, optical, thermal, mechanical, barrier properties compared equivalent structures double coated high-barrier petrochemical polymers. The results indicated that coatings PHBV successfully improved mechanical resistance ductility, protected from moisture, also reduced aroma oxygen permeances paper, having a minimal effect its optical thermal properties. Finally, compostability resultant was analyzed, confirming presence slightly delayed aerobic biodegradation disintegration paper.