摘要:
A demand or impulse ink jet (14) ejects droplets (24) of hot melt ink. The hot melt ink is heated from a solid state to a liquid state in the jet prior to the ejection of droplets on demand. The ink is then cooled on striking the target. The ink may contain a wax.
摘要:
A hot melt ink jet ink comprises a dispersed solid pigment which is formulated in a wax, or high molecular weight fatty acid or alcohol vehicle to form a hot melt ink which is solid at room temperature but liquid at above 80°C, that is under the usual conditions of use. In a preferred embodiment, dispersed graphite in a non-evaporative oil carrier, such as mineral oil, is formulated with candelilla wax, stearic acid and/or behenic acid.
摘要:
A hot melt impulse ink jet ink is disclosed which comprises a C 20 -C 24 acid or alcohol containing vehicle, preferably behenic acid, and a suitable coloring agent. One preferred ink comprises about 80% natural behenic acid, 15% of a ketone (such as stearone), 3% coloring agent, and 2% of a plasticizer intended to improve print quality. The inks are jettable at relatively high temperatures (80°-90°C) using impulse ink jet devices.