PHOTOPOLYMERIZABLE INKJET INK, INK CARTRIDGE, METHOD FOR FORMING IMAGE OR CURED PRODUCT, AND APPARATUS FOR FORMING IMAGE OR CURED PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide a method for forming an image or a cured product by using a photopolymerizable inkjet ink which can give a cured product having sufficient hardness, stretching property, and adhesiveness to a substrate and developing no tackiness, and which has a low viscosity at room temperature and a static surface tension suitable for discharging in an inkjet system.SOLUTION: The method for forming an image or a cured product includes at least an ink discharging step and a curing step. A photopolymerizable inkjet ink used for the method comprises a polymerizable compound and silica. The polymerizable compound comprises a first polymerizable compound showing a glass transition temperature of 90°C or higher in a single polymer of the first polymerizable compound, and a second polymerizable compound that can dissolve a substrate. The content of the first polymerizable compound is 50 mass% or more with respect to the whole amount of the polymerizable compound and the silica; the content of the second polymerizable compound is 30 mass% or more with respect to the whole amount of the polymerizable compound and the silica; and the content of the silica is from 5 mass% to 10 mass% with respect to the whole amount of the polymerizable compound and the silica.