| 发明名称 | Toner, method for producing the same, and image forming apparatus | ||
| 摘要 | A toner including: a base resin; and charge-controlling resin particles contained in the base resin, wherein the toner is in shape of particles, and the charge-controlling resin particles are present in a region of each toner particle which is 500 nm in depth from a surface of the toner particle and an average of amounts of the charge-controlling resin particles present in the regions of the toner particles is 20% by volume to 70% by volume, wherein an average of embedment rates of the charge-controlling resin particles in the toner particles is 90% or higher, where each embedment rate is an average of embedment rates of the charge-controlling resin particles in each toner particle, and wherein the charge-controlling resin particles have a charge amount of 60 μC/m2 or more as measured by a blow-off method. | ||
| 申请公布号 | US8852836(B2) | 申请公布日期 | 2014.10.07 |
| 申请号 | US201213525685 | 申请日期 | 2012.06.18 |
| 申请人 | Ricoh Company, Ltd. | 发明人 | Seki Masahiro;Sekiguchi Yoshitaka;Inoue Ryota;Fuwa Kazuoki |
| 分类号 | G03G9/08;G03G9/087;G03G9/097;G03G5/147 | 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: a base resin; and charge-controlling resin particles contained in the base resin, wherein the toner is in shape of particles, and the charge-controlling resin particles are present in a region of each toner particle which is 500 nm in depth from a surface of the toner particle and an average of amounts of the charge-controlling resin particles present in the regions of the toner particles, which is obtained from cross-sectional images of the toner particles under a transmission electron microscope, is 20% by area to 70% by area, wherein an average of embedment rates of the charge-controlling resin particles in the toner particles is 90% or higher, where each embedment rate is an average of embedment rates of the charge-controlling resin particles in each toner particle, and wherein the charge-controlling resin particles have a charge amount of 60μC/m2 or more as measured by a blow-off method, and wherein the charge-controlling resin particles each contain a charge-controlling agent which is at least one selected from the group consisting of a salicylic acid zinc complex, a salicylic acid zirconium complex and an organic boron complex. | ||
| 地址 | Tokyo JP | ||