公开(公告)号：EP2439593B1

公开(公告)日：2016-08-24

申请号：EP10783459.0

申请日：2010-06-04

Applicant: Toda Kogyo Corporation

Inventor： IWAMI,Katsuji ,  HARADA,Shigenori ,  KURITA,Eiichi ,  KINOSHITA,Kaori

IPC: G03G9/107 ,  G03G9/113

CPC classification number: G03G9/1075 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/0918 ,  G03G9/107 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1136

Abstract: The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical magnetic composite particles comprising a phenol resin as a binder and ferromagnetic iron oxide particles bonded to each other through the phenol resin, wherein the spherical magnetic composite particles have a ten-point mean roughness Rz of 0.3 to 2.0 µm. The magnetic carrier for an electrophotographic developer according to the present invention exhibits an excellent durability against peeling-off and abrasion of coating resins formed thereon and a high stability to mechanical stress exerted onto the carrier, is free from occurrence of spent toner, can be stably held over a long period of time without occurrence of fogging and unevenness in density of toner images, and can keep high-quality images with an excellent gradation for a long period of time.

Abstract translation: 本发明涉及一种用于在电子照相显影剂包含含有酚树脂作为粘合剂，并通过苯酚树脂彼此结合强磁性氧化铁颗粒的球形磁性复合体颗粒，worin球状磁性复合颗粒的磁性载体具有十点平均 的0.3〜2.0微米的粗糙度Rz。 在电子照相显影剂雅丁到本发明表现出抗剥离和在其上形成的涂层树脂的磨损和较高的稳定性，以机械应力的耐久性优异的磁性载体施加到载体上，是从废调色剂的发生游离，能够稳定地 举行了的时间，而不在调色剂图像的密度灰雾和不均匀性的发生期长，并能保持高品质的图像与时间的长期优异的灰度。

公开(公告)号：EP2439593A1

公开(公告)日：2012-04-11

申请号：EP10783459.0

申请日：2010-06-04

Applicant: Toda Kogyo Corporation

Inventor： IWAMI,Katsuji ,  HARADA,Shigenori ,  KURITA,Eiichi ,  KINOSHITA,Kaori

IPC: G03G9/107 ,  G03G9/113

CPC classification number: G03G9/1075 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/0918 ,  G03G9/107 ,  G03G9/1131 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1136

Abstract: The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical magnetic composite particles comprising a phenol resin as a binder and ferromagnetic iron oxide particles bonded to each other through the phenol resin, wherein the spherical magnetic composite particles have a ten-point mean roughness Rz of 0.3 to 2.0 µm. The magnetic carrier for an electrophotographic developer according to the present invention exhibits an excellent durability against peeling-off and abrasion of coating resins formed thereon and a high stability to mechanical stress exerted onto the carrier, is free from occurrence of spent toner, can be stably held over a long period of time without occurrence of fogging and unevenness in density of toner images, and can keep high-quality images with an excellent gradation for a long period of time.