Carton closure hot-melt packaging adhesives using ethylene vinyl acetate (EVA) polymer systems have been used for decades due to their availability, formulation latitude and performance attributes.1 Packaging adhesive formulations typically contain polymer, tackifier resin and wax.
Packaging adhesives using EVA can be formulated using a variety of tackifier systems, including rosin esters, hydrocarbon resins (C5, C9, C5/C9), terpene resins and hydrogenated hydrocarbon resins.2-7 However, for premium packaging adhesive applications where clarity, thermal stability and temperature resistance are critical, EVA-based packaging adhesives are often formulated with hydrogenated hydrocarbon tackifiers.