INKJET RECORDING INK, INKJET RECORDING METHOD, INKJET RECORDING HEAD AND INKJET RECORDING DEVICE

PROBLEM TO BE SOLVED: To provide inkjet recording technology that allows formation of an image showing good fixability and excellent scratch resistance without heating or irradiation of UV rays when the image is printed with a pigment ink comprising resin particles and a resin dispersion pigment.SOLUTION: An inkjet recording ink is provided, comprising a resin dispersion pigment, water, acrylic resin particles and a water-soluble compound. The acrylic resin particles have a Tg of 60°C or higher and an acid value of 50 to 150 mgKOH/g, in which a particle diameter (d50) representing 50% cumulative volume in the whole volume of the particles set to 100% when the particles are counted continuously from a smaller particle diameter, is 1.2 or more times and 3.5 times or less with respect to a particle diameter (D50) of the resin dispersion pigment; and the content of the acrylic resin particles is 0.1 to 1.6 mass ratio with respect to the resin dispersion pigment. The content of the water-soluble compound is 3 to 40 mass% with respect to the whole amount of the ink. An inkjet recording method using the above ink, a recording head storing the ink, and an inkjet recording device provided with the recording head are also disclosed.SELECTED DRAWING: None 【課題】樹脂粒子と樹脂分散顔料とを有する顔料インクで印刷した際に、加熱や、紫外線の照射無しで、良好な定着性を示し、耐擦過性に優れる画像形成を可能にするインクジェット記録技術の提案。【解決手段】樹脂分散顔料、水、アクリル系樹脂粒子と水溶性化合物を含有し、前記アクリル系樹脂粒子が、Ｔｇが６０℃以上、酸価が５０〜１５０ｍｇＫＯＨ／ｇ、その全体積を１００％としたときに小粒径方向から連続した累積体積が５０％となる粒子径（ｄ５０）が、前記樹脂分散顔料の該粒子径（Ｄ５０）に対して１．２倍以上、３．５倍以下であり、その含有量が、樹脂分散顔料に対して質量比で０．１〜１．６であり、かつ、前記水溶性化合物の含有量が、インク全量に対して３〜４０質量％であるインクジェット記録用インク、該インクを用いたインクジェット記録方法、該インクを収納した記録ヘッド、該記録ヘッドを設けたインクジェット記録装置。【選択図】なし