INK-JET PRINTING INK FOR ORGANIC ELECTROLUMINESCENT ELEMENT, AND PROCESS FOR PRODUCTION OF ORGANIC ELECTROLUMINESCENT ELEMENT

摘要

The problem is to provide such an ink-jet ink for organic EL devices that a jetted droplet trails no ligaments and wet-spreads well upon adhering. The solution is an ink-jet ink for organic electroluminescent device comprising water, a surfactant and an aqueous macromolecular material, wherein the ink has a static surface tension of 40 mN/m or less and a dynamic surface tension, measured by a maximum bubble pressure method at 100 Hz, of 55 mN/m or more.