Sakata Inx Corporation

Jun Kinjyo

Okinori Nakashima

Yoshiyuki Aoki

Ryohei Miyake

Yoichi Sato

Takuya Okamoto

An object of the invention is to provide a yellow ink composition for nonaqueous inkjet that achieves excellent density and weather resistance on printed matters whose printing surface is constituted by a polyvinyl chloride polymer, ethylene-vinyl acetate copolymer, or other vinyl polymer or the like, while also ensuring excellent discharge stability, even in a high-speed printing mode. To this end, a yellow ink composition for nonaqueous inkjet is provided that contains, as the pigment, C. I. Pigment Yellow 150 and C. I. Pigment Yellow 83 at a ratio by mass, calculated by 'C. I. Pigment Yellow 150/C. I. Pigment Yellow 83,' of 5/5 to 9/1, and further contains a pigment dispersant, a resin, and an organic solvent.

Yellow ink composition for nonaqueous inkjet

An object is to provide a non-aqueous inkjet ink composition offering excellent wettability, fixing property, solid-fill property, anti-mottling property, as well as discharge stability, even when printed at high speed on a matter to be printed whose printing side is constituted by a polyvinyl chloride or ethylene-vinyl acetate copolymer or other vinyl polymer, etc. As means for achieving the object, a non-aqueous inkjet ink composition containing an acrylic resin, a pigment, a pigment dispersant, and an organic solvent, is provided, wherein such non-aqueous inkjet ink composition is characterized by containing, as the organic solvent, a propylene carbonate and a diethylene glycol dialkyl ether, wherein the propylene carbonate is compounded by 5 to 25 percent by mass in the ink composition, while the diethylene glycol dialkyl ether is compounded in a manner providing a ratio of diethylene glycol dialkyl ether/propylene carbonate falls in a range of 3 to 8.

Non-aqueous inkjet ink composition

An object is to provide a non-aqueous inkjet ink composition which offers excellent fine print reproducibility, solid fill property, and anti-mottling property on printed matters, even when it is printed, at high speed, on materials whose printing surface is constituted by a polyvinyl chloride polymer, ethylene-vinyl acetate copolymer, or other vinyl polymer, etc., and which also offers excellent rub resistance, solvent resistance, discharge stability, and resolubility of dried coating film, and has a high flash point. To achieve the object, a non-aqueous inkjet ink composition is provided which contains an acrylic resin, a ketone resin, a pigment, and a pigment dispersant, as well as propylene carbonate and diethylene glycol alkyl ether as an organic solvent.

A non-aqueous inkjet orange ink composition includes a pigment, a pigment dispersant, and an organic solvent, wherein the pigment contains C.I. Pigment Orange 36 and at least one type of pigment selected from C.I. Pigment Red 242, C.I. Pigment Red 254, and C.I. Pigment Orange 71. The non-aqueous inkjet orange ink composition can offer high weather resistance, good color development property, and excellent dispersion stability, as well as an ink set using such ink composition.

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Osaka, Japan

Jun Kinjyo