| 摘要 |
The method involves applying a non-wetting coating material (50), to the discharge surface (18). It has lower surface energy than the phase change ink composition. The discharge surface is exposed to a hydrogen environment then the material is applied with a meniscus coating system (70) so that the large, unbroken molecular chains of material give a smooth surface. Gas pressure is applied in the ink jet head during coating to prevent the material from flowing into the nozzle (20). The coated area is cured at a higher temperature than recommended by the manufacturer to decompose the coating material in the jet nozzle and increase adherence. The coating material is pref. a fluorinated polymer, esp. pref. an amorphous perfluorodioxole copolymer. The surface energy difference increases the ink contact angle between the coated discharge surface and ink so the ink drop is more likely to be completely ejected. Hence less ink is left on the discharge surface to start the wetting process. |
