Abstract
Some kind of inkjet printers use water-based ink and it is known that the moisture contained in the ink causes paper curl. Especially high-density image printing, the paper becomes excessively curled and large paper curl lead to messy paper stack on the paper tray and it prone to smearing that may be caused the tip of the curled paper touched inkjet head. On the other hand, it is also known that the paper curl decreases when a curled paper is held in the paper path. However, a prediction method for these phenomena, which is appropriate for the efficient development of products, has not been developed. In this paper, we proposed a prediction method of curvature in such paper curl phenomena. The proposed method includes some mathematical models of paper that are the extension and the stress relaxation of the paper after ink printing. Whole coefficient related these mathematical models are decided experimentally. Then, the calculation of curvature after ink printing is carried out. The proposed prediction method is verified experimentally and the results indicate that it provides appropriate precision for paper curl of an inkjet printer with water-based ink.
