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Title	Feasibility of incorporating recycled multilayer LDPE/EVOH films into flexible packaging
ID_Doc	17976
Authors	Barros, C; Carneiro, OS; Machado, AV
Title	Feasibility of incorporating recycled multilayer LDPE/EVOH films into flexible packaging
Year	2024
Published	Polymer Engineering And Science, 64, 8
Abstract	Multilayer films are widely used in the food industry because they allow the combination of properties of different materials to increase product shelf life without sacrificing product value. Despite the associated benefits, these films are difficult to recycle due to material immiscibility and difficult layer separation. Thus, the purpose of this research is to investigate the feasibility of incorporating recycled plastic material from the multi-material film industry into extruded films for food packaging. To simulate the thermomechanical recycling, two different post-industrial polymeric wastes of low-density polyethylene (LDPE) (with linear low-density polyethylene (LLDPE) or with ethylene vinyl alcohol (EVOH)), were reprocessed four times in a single-screw extruder. Moreover, these polymeric wastes were blended with virgin LDPE to improve the extrusion process control and to assess their effect on the blend properties. The extrusion experiments demonstrate that reprocessing of multilayer films and processing of their blends with virgin LDPE is feasible. Moreover, the mechanical and thermal properties of the corresponding films are not negatively affected when compared with those of virgin LDPE films. Nevertheless, the optical properties of recycled EVOH films, were lower than those of virgin LDPE or recycled LLDPE, with high haze and low gloss.
PDF	https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/pen.26779

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