Patent ID: 9114421
Filing Date: 2015-08-25
Classification: B05D,C09D,Y10T

Abstract:
1. A method of formulating a solvent-based flexographic or rotogravure ink to provide good pin-holing performance at high-speed printing conditions comprising combining the ink ingredients such that the Maron-Pierce MPF (Maximum Packing Fraction) of the resulting ink is below 42 volume percent at a shear of either 10 reciprocal seconds or 2100 reciprocal seconds; wherein the MPF is determined by testing the ink at a series of stages of drying as the solids content is increasing, and the MPF is a linear relationship between the inverse square root of viscosity and the solids content; and wherein the MPF is calculated using Equation (10): wherein: η is the intrinsic viscosity of the suspension; η φ is the volume fraction of the solids; and φ