PURPOSE: To impart excellent water repelling characteristics to the surface of a nozzle and make the lasting properties and durability of effect excellent by forming a water repelling layer composed of a uniform mixed layer of fluororesin and one or more kind of an acrylic resin, an epoxy resin or the like on the surface of the nozzle.
CONSTITUTION: A masking tape 13 is bonded to the rear of a nozzle plate 11. Next, the nozzle plate 11 is dipped in an aqueous solution containing a mixture consisting of a fluoroacrylate resin and a fluoromethacrylate resin and having polytetrafluoroethylene fine particles (5μm or less) dispersed therein and subjected to anodic electrolysis for 2min while voltage of 50V is applied using a stainless 304 material as a cathode to form a fluoroacrylate/ fluoromethacrylate mixed resin film 14 containing polytetrafluoroethylene on the surface of the nozzle plate 11. This nozzle plate 11 is heat-treated and, after the masking tape on the rear of the nozzle plate is peeled off, the nozzle plate is further heat-treated at 180°C for 30min to provide a water repelling layer with a thickness of about 10μm only on the surface part of the nozzle plate.
| WO/2019/013809 | PRINTING DEVICE HOUSED WITHIN STAND OF DISPLAY |
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KARASAWA YASUSHI
HAYASHI CHIEKO
