| 摘要 |
<p>PURPOSE:To prevent the deterioration of toner performance such as the deterioration of image quality at the time of taking photograph by making a toner spherical without heat processing. CONSTITUTION:This producing method has a pulverizing process for a toner material containing a resin and a coloring agent, and the pulverized toner is surface ground by an impact grinder to make the toner spherical. That is, the pulverized toner obtained in the pulverizing process is introduced into the impact grinder having grinding zone 4 formed between the outside surface of a rotor 1 rotating around a rotary shaft 2 and the inside surface of a liner 6. The corners or projections of breakage surface of the toner particle, which are generated by the collision of the toner particle with each other or with the wall surface of the a pulverizer, are removed or buried into the toner main body by surface grinding to make the shape spherical. The outside surface of the rotor 1 and the inside surface of the liner 6 has corrugated acute angled grinding blades. As a result, the producing method simple in the process and free from the thermal damage of the toner is obtained.</p> |
