| 摘要 |
<p>PURPOSE:To obtain such a toner capable of being made into small particle size, excellent in reproducibility of color tone, electrification property, and environmental resistance and causes no deterioration in image qualities nor cleaning defect even when repeatedly used, by dissolving or dispersing a material containing a polyester resin and a coloring agent in a solvent, then granulating the obtd. liquid in a water medium containing inorg. dispersant and removing the solvent. CONSTITUTION:A polyester resin is used as a binder resin for the toner, and a coloring agent and other additives as required are added to the toner. These polyester resin, coloring agent and other additives are dissolved or dispersed in a solvent capable of dissolving the polyester resin. Then, the prepared liquid (toner base liquid) containing the polyester resin, coloring agent and other additives dissolved or dispersed in the solvent is granulated into a specified particle size in a water medium containing an inorg. dispersant. As for the water medium, water is generally used. Thus, the toner base liquid is granulated in the water medium and the solvent is removed. After the solvent is removed, the obtd. toner is preferably washed with hydrochloric acid or the like.</p> |
