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    • 7. 发明专利
    • Ink
    • 墨水
    • JP2013155322A
    • 2013-08-15
    • JP2012017647
    • 2012-01-31
    • Ricoh Co Ltd株式会社リコー
    • KATO KEITAKUDO MAKINAKAGAWA TOMOHIROGOTO AKIHIKO
    • C09D11/00B41J2/01B41M5/00
    • C09D11/30C09D11/102
    • PROBLEM TO BE SOLVED: To provide an inkjet recording liquid in which aggregation of a colorant is prevented even when the inkjet recording liquid is locally dried at printer head nozzles, and whose jetting stability is excellent, in an ink including the colorant and a resin emulsion, and excellent in abrasion-resistance and lustrousness.SOLUTION: An inkjet recording liquid at least includes water, a water-soluble organic solvent, a colorant, and a resin emulsion, wherein the colorant includes a resin coating type coloring agent, and the resin emulsion is an anionic polyurethane resin emulsion, and a relation between an initial particle diameter (particle diameter D50(INI)) of particles included in a liquid composition and a particle diameter (D50(60%)) of particles included in the liquid composition which has been dried to a state having 60% by weight of the initial state satisfies following formula (1): 1.00≤D50(60%)/D50(INI)
    • 要解决的问题:为了提供喷墨记录液体,即使在喷墨记录液在打印头喷嘴局部干燥并且其喷射稳定性优异的情况下也能防止着色剂的聚集,在包含着色剂和树脂乳液的油墨中 ,耐磨性和光泽性优异。解决方案:喷墨记录液体至少包括水,水溶性有机溶剂,着色剂和树脂乳液,其中着色剂包括树脂涂布型着色剂,树脂 乳液是阴离子聚氨酯树脂乳液,并且包含在液体组合物中的颗粒的初始粒径(粒径D50(INI))与液体组合物中包含的颗粒的粒径(D50(60%))之间的关系,其中 已经干燥至初始状态的60重量%满足下式(1):1.00≤D50(60%)/ D50(INI)<1.30的状态。
    • 8. 发明专利
    • Inkjet ink set
    • INKJET INK SET
    • JP2013010823A
    • 2013-01-17
    • JP2011142964
    • 2011-06-28
    • Ricoh Co Ltd株式会社リコー
    • NAKAGAWA TOMOHIROFUJII ICHIROKUDO MAKIKATO KEITA
    • B41J2/01B41M5/00C09D11/00C09D11/322C09D11/324C09D11/328
    • PROBLEM TO BE SOLVED: To provide an inkjet ink set or the like, which is excellent in discharge stability and can prevent color bleeds or curls from occurring between black color and colors other than the black even if an image is formed on a paper.SOLUTION: A black ink comprises water, a water-soluble organic solvent A, a water-soluble organic solvent B, a water-soluble organic solvent C, and a colorant, wherein: the total content of the solvents A, B and C is 25 to 50 mass%; and the content of the solvent A is equal to or larger than the total content of the solvent B and C. Inks of colors other than the black contains the water, the solvent A, the solvent B, and the colorant, but does not contain the solvent C, wherein: the total content of the solvent A and the solvent B is 25 to 50 mass%; the total content of the solvent A is equal to or lower than the solvent B; the equilibrium water contents of the solvent A, solvent B, and solvent C at 23°C and at 80% relative humidity (RH) are 41 to 49 mass%, 35 to 39 mass%, and 11 to 24 mass%, respectively; and when the amount of evaporation of water is 30 mass%, the viscosity of the black ink is larger than those of color inks other than the black ink.
    • 要解决的问题:为了提供喷墨稳定性优异的喷墨油墨组合物,并且即使在黑色上形成图像也能够防止黑色和黑色以外的颜色发生或卷曲 纸。 解决方案:黑色油墨包括水,水溶性有机溶剂A,水溶性有机溶剂B,水溶性有机溶剂C和着色剂,其中溶剂A,B的总含量 C为25〜50质量%。 并且溶剂A的含量等于或大于溶剂B和C的总含量。除了黑色以外的颜色的墨水包含水,溶剂A,溶剂B和着色剂,但不包含 溶剂C,其中溶剂A和溶剂B的总含量为25〜50质量%。 溶剂A的总含量等于或低于溶剂B; 溶剂A,溶剂B和溶剂C在23℃和80%相对湿度(RH)下的平衡水含量分别为41〜49质量%,35〜39质量%,11〜24质量% 并且当水的蒸发量为30质量%时,黑色油墨的粘度比黑色油墨以外的其它颜色油墨的粘度大。 版权所有(C)2013,JPO&INPIT