Non-aqueous inkjet ink composition

Abstract

The present invention addresses the problem of providing a non-aqueous inkjet ink composition which can exhibit excellent fine print reproducibility, excellent solid filling properties and excellent anti-mottling properties when printed at a high speed onto an object having a printing surface made from a vinyl polymer, e.g., polyvinyl chloride and an ethylene-(vinyl acetate) copolymer, or the like, and which has excellent jetting stability and excellent dried coating film re-dissolvability. As the solution for the problem, a non-aqueous inkjet ink composition is provided, which comprises a pigment, a pigment dispersant and an organic solvent, wherein the organic solvent comprises a diethyleneglycol alkyl ether acetate and a diethyleneglycol dialkyl ether, the total content of the diethyleneglycol alkyl ether acetate and the diethyleneglycol dialkyl ether is 40 to 80 parts by mass in 100 parts by mass of the non-aqueous inkjet ink composition, and the diethyleneglycol alkyl ether acetate is blended with the diethyleneglycol dialkyl ether in such an amount that the following equation can be satisfied: (the diethyleneglycol alkyl ether acetate) / (the diethyleneglycol dialkyl ether) = 0.25 to 4.5.

Description

technical field [0001] The present invention relates to a non-aqueous inkjet ink composition suitable for producing large-format signboards and the like whose printing surfaces are mainly composed of vinyl chloride polymers or ethylene-vinyl acetate copolymers. Background technique [0002] In recent signage advertisements, in addition to vivid and refined logos and patterns, photo-style elements such as the appearance of products and faces of people are increasing. Furthermore, with regard to the size of the signboard, large format signboards are widely used in order to give the viewer a stronger impact. In the past, as a method of producing signboard advertisements, in the case of signs, it is common to cut colored sheets into the shape of characters and paste them, and it is common to use various printing machines when making them into photographic styles. Therefore, there are problems that a lot of time and effort are required for production, and large-scale equipment s...

AI Technical Summary

Problems solved by technology

[0009] However, in recent years, higher printing speeds have been demanded, and when printing is performed with conventional nonaqueous inkjet ink compositions (especially nonaqueous inkjet ink compositions using environmentally friendly organic solvents), blurring of fine print occurs. In addition, due to the long-term use of the printer, the ink attached to the maintenance parts of the printer dries and accumulates, resulting in maintenance problems such as clogging of the waste liquid tube, etc.

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