公开(公告)号：US20050250031A1

公开(公告)日：2005-11-10

申请号：US11083934

申请日：2005-03-21

申请人： Maria Mc Dougall ,  Richard Veregin ,  Vladislav Skorokhod ,  Mary Mc Stravick ,  Deepak Maniar ,  Paul Morehouse ,  Rachael Mc Grath ,  Jackie Parker ,  Shigang Qui ,  Mary Schlitzer ,  Michael Thompson ,  Christopher Pattison ,  Thomas Dombroski

发明人： Maria Mc Dougall ,  Richard Veregin ,  Vladislav Skorokhod ,  Mary Mc Stravick ,  Deepak Maniar ,  Paul Morehouse ,  Rachael Mc Grath ,  Jackie Parker ,  Shigang Qui ,  Mary Schlitzer ,  Michael Thompson ,  Christopher Pattison ,  Thomas Dombroski

IPC分类号： G03G9/08 ,  C09D1/04 ,  G03G9/087 ,  G03G15/00

CPC分类号： G03G9/08708 ,  G03G9/0823 ,  G03G9/08782 ,  G03G9/09708 ,  G03G9/09725 ,  G03G9/1132

摘要： A developer includes black toner particles and carrier particles, the black toner particles including at least one binder, at least one black colorant and one or more external additives, wherein the toner particles comprise from about 7 to about 15 pph of the developer, and wherein the toner particles exhibit a triboelectric charge of from about −25 to about −50 μC/g at toner particle concentrations of about 7 to about 15 pph of the developer. The developer is ideally suited for use in a high speed (greater than 100 prints per minute) semiconductive magnetic brush development apparatus. Preferably, the black toner particles include a styrene acrylate binder, and the external additives include from about 1.3 to about 2.1% by weight of the toner particles of a first silica having an average particle size of from about 35 to about 45 nm, from about 0.5 to about 1.0% by weight of the toner particles of a second silica having an average particle size of from about 135 to about 160 nm, and from about 0.2 to about 0.5% by weight of the toner particles of a titania having an average particle size of from about 35 to about 45 nm, with an external additive toner surface area coverage of from about 25 to about 45%.

摘要翻译： 显影剂包括黑色调色剂颗粒和载体颗粒，黑色调色剂颗粒包括至少一种粘合剂，至少一种黑色着色剂和一种或多种外部添加剂，其中调色剂颗粒包含约7至约15pph的显影剂，其中 调色剂颗粒在约7至约15pph的显影剂的调色剂颗粒浓度下表现出约-25至约-50μC/ g的摩擦电荷。 该显影剂非常适用于高速（每分钟100印刷）半导电磁刷开发设备。 优选地，黑色调色剂颗粒包括苯乙烯丙烯酸酯粘合剂，并且外部添加剂包括约1.3至约2.1重量％的平均粒度为约35至约45nm的第一二氧化硅的调色剂颗粒，约 0.5至约1.0重量％的平均粒径为约135至约160nm的第二二氧化硅的调色剂颗粒和约0.2至约0.5重量％的具有平均颗粒的二氧化钛的调色剂颗粒 尺寸为约35至约45nm，外部添加剂调色剂的表面积覆盖率为约25至约45％。