Adhesion of Liquid Electrographic Images with a Substrate in Flexible Packaging

Abstract

Dispersants for liquid immersed developers, obtaining strong peel force in soft packaging applications formed by laminating a film on a toner layer fused on a thin PET film, were investigated. It was estimated that commercially available high molecular dispersants with sufficient dispersion stability decrease the toner adhesion with a PET film due to their hydrophobic components for the dispersiblility in a nonpolar carrier solvent and amine components for the affinity with toner resin, which decrease the adhesion caused by the reaction with the isocyanate component of adhesive agents used for the lamination. A laminated application with sufficient peel force can be obtained by using the developer comprising the dispersant optimized both for the structure of amine component and the ratio of hydrophobic component.