Active energy ray-curable ink composition

Abstract

Disclosed is an energy ray-curable ink composition containing a coloring agent, a monomer and a photopolymerization initiator. As the monomer, 10-90% by weight of an acrylamide derivative is contained relative to the total weight of the ink composition, and the viscosity of the ink composition as a whole is 3-35 mPas at 25 DEG C. This ink composition has low viscosity without being diluted with a diluent, while exhibiting good storage stability and good pigment dispersibility in cases where the coloring agent is composed of a pigment. The ink composition further has excellent stability in continuous discharge to a recording medium, and exhibits good curability even when the energy is low and the integrated amount of light is not more than 150 mJ / cm2. Furthermore, the ink composition enables to obtain good print quality on a non-absorptive recording medium, and in particular, it exhibits excellent adhesion to a recording medium base.

Description

technical field

[0001] The present invention relates to an energy ray curable ink composition, an ink composition mainly printed by an inkjet recording method and cured by irradiating energy ray, especially an ultraviolet curable ink composition. Background technique

[0002] The inkjet recording method uses pressure, heat, electric field, etc. as a driving source, and prints by ejecting liquid ink from a nozzle to a recording medium. This recording method is low in running costs, can obtain high-quality printed matter, and can use various inks such as water-based inks and oil-based inks, so the market has been expanding in recent years.

[0003] Recently, since the image forming method of the inkjet method can obtain the same quality image quality as that of the silver halide photography method at a very low cost, it is economically more economical for applications that require frequent replacement, such as large posters that require a large image area. big advantage. [...