Adhesion Promotion for UV Coatings and Inks onto Difficult Plastic Substrates

摘要

Esuring proper adhesion between energy-curable coatings and nonabsorptive substrates has long been a significant challenge.Whether high shrinkage seen with the coating itself or low surface energy of the substrate,multiple factors can negatively influence the adhesion properties of a finished formulation.Past solutions to overcome these hurdles have included the use of pretreated substrates and the addition of solventborne adhesion promoters.However,escalating costs,increased processing times and regulatory concerns have forced formulators to start searching for alternative solutions.This paper discusses the incorporation of specialty co-binder resins to improve adhesion onto difficult plastic substrates.Because these novel adhesion promoters are solvent-free,low viscosity and widely compatible,formulators can tackle the industry's problem without compromising the performance of their energy-curable coatings.