Research On Water-Based UV Ink For Ink Jet Printing

Water-based UV ink for ink jet printing with environmental protection, solvent-free evaporation and good rheological properties occupied more and more obvious advantages in ink-jet printing market.But most of the current ink has the problem of high viscosity and low curing rate,So Water-based UV ink with low viscosity and high curing rate is obtained by orthogonal experiment and single factor optimization method in this paper .The composition and the UV curing principle of water -based UV ink were studied , and the type and dosage range of water-based UV ink for ink-jet printing were determined by the photo chemical reaction mechanism and the basic theory of ink. In the experiment of prepolymer ratio, according to the principle of physical blending, the experimental scheme was designed ,obtained the optimal formula of prepolymer.The single factor selection method was used to determine the optimal interval of the main components of the ink. In the ink formulation experiment, the four-factor three-level orthogonal experiment scheme was designed. The main performance of the water-based UV ink was tested,used method for data for processing. The trend graph was drawn by the comprehensive equilibrium method. Obtained the best water-based UV ink formulation.Experimental results show that:When the prepolymer is polyvinyl alcohol(0588) :waterborne polyurethane acrylate is 3:1,it is good in viscosity and solid content. The addition ofphoto-activator can significantly improve the curing rate of ink.When the prepolymer is 75% ,Dye 7%, photo initiator is 5% and photo activator is 3.5%. The water-based UV ink is excellent in curing rate and color strength, and in terms of viscosity, water resistance, adhesion and surface tension are in line with water-based UV ink of the national standard requirements'for ink-jet printing, the quality of print is improved.