发明授权
- 专利标题: Two-component type developer and image forming method
- 专利标题(中): 双组分型显影剂和成像方法
-
申请号: US09434401申请日: 1999-11-05
-
公开(公告)号: US06312862B1公开(公告)日: 2001-11-06
- 发明人: Kenji Okado , Ryoichi Fujita , Yushi Mikuriya , Shinya Yachi , Kazumi Yoshizaki
- 申请人: Kenji Okado , Ryoichi Fujita , Yushi Mikuriya , Shinya Yachi , Kazumi Yoshizaki
- 优先权: JP10-315229 19981106; JP10-315230 19981106; JP10-315234 19981106
- 主分类号: G03G9113
- IPC分类号: G03G9113
摘要:
A two-component type developer has a negatively chargeable toner having toner particles and an external additive and a magnetic-fine-particle-dispersed resin carrier. The magnetic-fine-particle-dispersed resin carrier has composite particles containing at least inorganic compound particles and a binder resin. The inorganic compound particles have been surface-treated with a lipophilic-treating agent having at least one type of functional group (A) selected from the group consisting of an epoxy group, an amino group, a mercapto group, an organic acid group, an ester group, a ketone group, an alkyl halide group and an aldehyde group, or a mixture of the agent. The composite particles have been surface-coated with at least one type of coupling agent having at least one type of functional group (B) different from the functional group (A) the lipophilic-treating agent. The functional group (B) the coupling agent has being a functional group or groups selected from the group consisting of an epoxy group, an amino group and a mercapto group. The negatively chargeable toner has a weight-average particle diameter of from 3 &mgr;m to 9 &mgr;m.