| 发明名称 |
Toner, developer, image forming method and image forming apparatus |
| 摘要 |
A toner containing toner particles, each toner particle containing: a releasing agent; a colorant; and a binder resin containing at least a crystalline polyester resin and a non-crystalline polyester resin, wherein in the case where a volume average particle diameter of the toner is defined as Dv, the toner contains a group of the toner particles having 4/5 Dv, and a group of the toner particles having 6/5 Dv, and wherein an endothermic value A of the crystalline polyester resin at a first temperature increase in DSC of the toner, an endothermic value B of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particle having 4/5 Dv, and an endothermic value C of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particles having 6/5 Dv satisfy the relation represented by the following formulas:
50<(B/A)×100<90, and110<(C/A)×100<150. |
| 申请公布号 |
US8741521(B2) |
申请公布日期 |
2014.06.03 |
| 申请号 |
US201113232518 |
申请日期 |
2011.09.14 |
| 申请人 |
Ricoh Company, Ltd. |
发明人 |
Hozumi Mamoru;Sugimoto Tsuyoshi;Watanabe Naohiro;Satoh Tomoyuki;Hanatani Shinya;Uchinokura Osamu;Hirohara Kiwako |
| 分类号 |
G03G9/087 |
主分类号 |
G03G9/087 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A toner comprising:
toner particles, each toner particle comprising: a binder resin; a releasing agent; and a colorant, wherein the binder resin comprises at least a crystalline polyester resin and a non-crystalline polyester resin, wherein in the case where a volume average particle diameter of the toner is defined as Dv, the toner contains a group of the toner particles having the volume average particle diameter of 4/5 Dv, and a group of the toner particles having the volume average particle diameter of 6/5 Dv, and wherein an endothermic value A of the crystalline polyester resin at a first temperature increase in a differential scanning calorimetry of the toner, an endothermic value B of the crystalline polyester resin at a first temperature increase in a differential scanning calorimetry of the group of the toner particles having the volume average particle diameter of 4/5 Dv after classification, and an endothermic value C of the crystalline polyester resin at a first temperature increase in a differential scanning calorimetry of the group of the toner particles having the volume average particle diameter of 6/5 Dv after classification satisfy the relation represented by the following formulas:
50<(B/A)×100<90, and110<(C/A)×100<150.
|
| 地址 |
Tokyo JP |
