Sakata Inx Corporation

Ryohei Miyake

Hiroyuki Konishi

Okinori Nakashima

Yoshiyuki Aoki

Jun Kinjyo

Yoichi Sato

Hirohito Maeda

Koki Ogasahara

Jun Kinjoh

Yuya Watanabe

An object is to provide a nonaqueous inkjet ink composition offering excellent solid filling property and anti-mottling property, as well as excellent ink stability, discharge stability, and scratch resistance, even when printed at high speed on printing targets whose printing face is constituted by a polyvinyl chloride, ethylene-vinyl acetate-based copolymer, or other vinyl-based polymer, etc. As a solution, a nonaqueous inkjet ink composition is provided that contains acrylic-based resin, organic coloring pigment and/or carbon black, alumina, pigment dispersant, and organic solvent, wherein the organic solvent comprises propylene carbonate, diethylene glycol dialkyl ether, and dipropylene glycol alkyl ether acetate, and alumina is contained by 5 to 30 parts by mass relative to 100 parts by mass representing the total of organic coloring pigment and carbon black.

Nonaqueous inkjet ink composition

A nonaqueous inkjet ink composition contains acrylic-based resin, pigment, pigment dispersant, and organic solvent, wherein the nonaqueous inkjet ink composition is characterized in that it contains propylene carbonate, diethylene glycol dialkyl ether, as well as tetraethylene glycol dialkyl ether, as the organic solvent, and is compounded in a manner that the propylene carbonate accounts for 1.0 to 20.0% by mass in the ink composition and the content of the diethylene glycol dialkyl ether relative to the propylene carbonate content, or 'diethylene glycol dialkyl ether/propylene carbonate,' falls between 9.0 and 20.0.

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 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.

Non-aqueous inkjet ink composition

A non-aqueous magenta ink composition for ink jet printing comprising a pigment, a pigment dispersant, a binder resin and an organic solvent, wherein the pigment comprises C.I. Pigment Red 254 and a red pigment having a quinacridone skeleton, and wherein a total amount of the C.I. Pigment Red 254 and the red pigment having a quinacridone skeleton is not less than 50% by mass in the pigment.

Nonaqueous ink-jet magenta ink composition

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

Ryohei Miyake