公开(公告)号：US20140220488A1

公开(公告)日：2014-08-07

申请号：US14159045

申请日：2014-01-20

Applicant: Konica Minolta, Inc.

Inventor： Yukio HOSOYA ,  Futoshi KADONOME ,  Kazue NAKAMURA ,  Saburou HIRAOKA ,  Yasuko UCHINO

IPC: G03G21/00

CPC classification number: G03G13/08 ,  G03G5/14704 ,  G03G5/14708 ,  G03G5/14734 ,  G03G9/09708 ,  G03G9/09733 ,  G03G9/09791

Abstract: Provided is an image forming method, in which excellent cleaning properties are obtained for a long period of time even when the process is employed to an image forming apparatus with a charging roller for charging a photoreceptor, and a favorable image can be formed while inhibiting occurrence of a black spots-like image defect even in a high temperature and high humidity environment. In the image forming method, charging of a photoreceptor in a charging step is performed by a charging roller. A toner for electrostatic image development includes toner base particles added with an external additive. The external additive contains at least first external additive particles composed of a polytetrafluoroethylene and second external additive particles composed of at least one selected from a fatty acid metal salt and an amide wax. The number average molecular weight of the polytetrafluoroethylene constituting the first external additive particles is 500 to 20,000, and the second external additive particles are added in a ratio of 0.01 to 0.5 parts by mass per 100 parts by mass of the toner base particles.

Abstract translation: 提供一种图像形成方法，其中即使在对具有用于充电感光体的充电辊的成像设备进行处理的情况下也可以获得优异的清洁性能，并且可以在抑制发生的同时形成良好的图像 即使在高温高湿环境下也会出现黑点状图像缺陷。 在图像形成方法中，通过充电辊进行充电步骤中的感光体的充电。 用于静电图像显影的调色剂包括添加有外部添加剂的调色剂基础颗粒。 外部添加剂至少含有由聚四氟乙烯构成的第一外部添加剂粒子和由选自脂肪酸金属盐和酰胺蜡中的至少一种构成的第二外部添加剂粒子。 构成第一外部添加剂颗粒的聚四氟乙烯的数均分子量为500〜20,000，第二外添剂粒子相对于调色剂母粒100质量份为0.01〜0.5质量份。