10/16/2014

www.gupta-verlag.de/polyurethanes

Waterborne PUD adhesives for flexible packaging

The initial results of the research, conducted by the Packaging Division of the Department of Food, Environmental and Nutritional Sciences of the University of Milan, Italy, show new routes for the food packaging industry thanks to the increased sustainability combined with enhanced physical properties of the investigated solution. The project has investigated the possibility of laminating polyester CNC (cellulose nano-crystals) coated films to a polyolefinic layer by using special waterborne polyurethane adhesives from Sapici. According to the study, the laminates properties are directly related to the affinity between the laminating film, CNCs and the selected adhesive. The best results in terms of oxygen-barrier and mechanical properties have been obtained with the combination of PET coated (CNCs)/PE. Sapici waterborne specific polyurethane adhesives for flexible packaging have contributed to both the effectiveness and the sustainability values of the studied solutions. The final packaging (PET/CNC/waterborne PUD adhesive/PE) shows significantly improved gas and vapour barrier values, and is now opening new sustainabile routes for the food packaging industry, says Sapici.

www.gupta-verlag.de/polyurethanes