| 发明名称 | Toner and image forming apparatus | ||
| 摘要 | To provide a toner, which contains: toner base particles each containing a binder resin and a colorant; and an external additive containing inorganic particles and fatty acid metal salt particles, wherein the inorganic particles contain at least hydrophobic silica particles, wherein a liberation ratio Ya of the hydrophobic silica particles from the toner is 1% by mass to 20% by mass, and wherein a libration ratio Yb of the fatty acid metal salt particles from the toner is 30% by mass to 90% by mass. | ||
| 申请公布号 | US8795938(B2) | 申请公布日期 | 2014.08.05 |
| 申请号 | US201313743528 | 申请日期 | 2013.01.17 |
| 申请人 | Ricoh Company, Ltd. | 发明人 | Uchinokura Osamu;Satoh Tomoyuki;Honda Takahiro;Inoue Daisuke;Hozumi Mamoru |
| 分类号 | G03G9/08;G03G15/08;G03G9/097 | 主分类号 | G03G9/08 |
| 代理机构 | Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. | 代理人 | Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. |
| 主权项 | 1. A toner, comprising: toner base particles each comprising a binder resin and a colorant; and an external additive comprising inorganic particles and fatty acid metal salt particles, wherein the inorganic particles comprise at least hydrophobic silica particles, wherein a liberation ratio Ya of the hydrophobic silica particles from the toner is 1% by mass to 20% by mass, and wherein a libration ratio Yb of the fatty acid metal salt particles from the toner is 30% by mass to 90% by mass. | ||
| 地址 | Tokyo JP | ||