Conductive Layers on a Shrinkable PET Film by Flexographic Printing

Abstract

In this study, the extremely important and difficult topic of flexographic printing on a heat-shrinkable substrate was taken up. Six commercially available, electrically conductive inks based on silver, copper and graphite nanoparticles were selected and tested upon their applicability for printing on the temperature-sensitive PET material. As a printing substrate, the one-direction heat-shrinkable PET film, with a maximum shrinkage of 78%, was selected. All of the examined inks were subjected to the printing process throughout three different anilox line screens. The tested inks, along with the electric paths printed with them, were subjected to various tests. The main parameters were evaluated, such as printability combined with the rheology tests and ink adhesion to the examined PET substrate together with the electrical conductivity before and after the shrinkage.

Edible ink for food printing and packaging applications: a review

“…Currently, this printing method is used for more than 75% of packaging products. 63,64 Palo et al scrutinized the exographic printing method for printing on an edible substrate and considered it a potential technique for creating solid nanoparticulate systems with improved dissolution characteristics. Because of proper viscosity, the CMC-based edible ink for exographic printing demonstrated clear shear thinning behavior, and the choice of medium yield stress (2.994 Pa) rendered printing reasonably simpler than that using ink with larger yield stress that tends to block the anilox rollers.…”