Abstract
Rheological properties of UV flexographic (flexo) inks were investigated. UV flexo suspensions of carbon black in liquid medium having various binding materials such as acylate pre-polymer, di-/multi-functional monomer, and diluents, were used as sample inks. Inks were characterized on a rheometer in terms of steady and dynamic behaviors.
In order to understand and to control the rheological property of UV flexo inks, we must determine the specific rheological properties of chemical and/or physical interactions of their components (pigments, functional monomers, and pre-polymers). In particular, we discuss the influence of multi-functional monomers (TMPTA, PO-TMPTA, and GPTA) and the relationship between the rheological property and transient networks formed by carbon black.
