INKJET RECORDING APPARATUS AND INKJET RECORDING METHOD

摘要

An inkjet recording apparatus for forming an image by discharging an ink including an ink pigment and a polymerizable compound containing at least an N-vinyl lactam, in which the 90% diameter in cumulative volume distribution of the particle diameters of the ink pigment is equal to or less than 500 nm and the content of N-vinyl lactam is 3% to 24%, from nozzles of an inkjet head, which includes nozzle arrays having nozzles each of which discharges a curable ink cured by applied active energy and which are arranged in the first direction at a pitch P, the nozzle arrays being N (N≧4) nozzle arrays of every color, which respectively discharge thick inks of at least four colors and which nozzle arrays are arranged to be shifted by P/N away from each other in the first direction.

主权项

1. An inkjet recording apparatus comprising:
an inkjet head which has nozzle arrays having nozzles each of which discharges a curable ink cured by applied active energy and which are arranged in a first direction at a pitch P, the nozzle arrays being N nozzle arrays with N≧4 of every color, which respectively discharge thick inks of at least four colors including cyan, magenta, yellow, and black, and the nozzle arrays being arranged to be shifted by P/N away from each other in the first direction; an active energy imparting device configured to impart the active energy to ink droplets discharged from the nozzles and jetted on a recording surface of a recording medium; a retention device configured to dispose and retain the inkjet head and the active energy imparting device along a second direction that is orthogonal to the first direction; a scanning device configured to cause the retention device and the recording medium to relatively scan at a speed of equal to or more than 0.9 m/s in the second direction; a movement device configured to cause the retention device and the recording medium to relatively move in the first direction in every scanning action by the scanning device; and a control device configured to cause an image to be formed on the recording surface of the recording medium while causing the inkjet head and the active energy imparting device retained by the retention device to relatively scan each region of the recording medium plural times, wherein the curable ink includes an ink pigment and a polymerizable compound containing at least an N-vinyl lactam, the 90% diameter in cumulative volume distribution of the particle diameters of the ink pigment is equal to or less than 500 nm, and the content of N-vinyl lactam is 3% to 24%.