| abstract |
[Problem] To provide an ultraviolet-curable electroconductive ink composition which has favorable printability, print accuracy, and adhesiveness onto a base material, has been adapted to high-speed printing such as flexographic printing, and can exert stable electroconductive properties, so as to enable high-definition printing and to prevent transfer errors and rubbing, even with high-speed printing. [Solution] A photo-curable electroconductive ink composition containing: (A) an oligomer of a urethane acrylate; (B) at least three types of acrylate selected from a tetrafunctional acrylate, a trifunctional acrylate, a difunctional acrylate, and a monofunctional acrylate; (C) an electroconductive filler; (D) at least two types of photopolymerization initiator; and (E) a polymer dispersant; 77 to 85 mass% of the electroconductive filler (C) being blended with respect to the total mass of the photocurable electroconductive ink composition, and 80 mass% or more of the electroconductive filler (C) being scales, foil, or flakes of a silver powder having a particle size distribution such that 50% of the particles have diameters greater than 5 μm. |