Influence of surface free energy of biodegradable films on optical density of ink coated fields of prints

摘要

The paper presents the results of studies on the effect of surface free energy of polymeric biodegradable films, intended for manufacture of packages, on optical density of fields fully coated with printing ink in printing by flexographic technique. The surface free energy of biodegradable films was determined by the Owens-Wendt method. Both polar and dispersive components of surface free energy of the films tested were calculated. It has been found the value of surface free energy of the film and its polar and dispersive components have a substantial impact on optical density of fields coated with printing ink on printed films.