公开(公告)号：US08945805B2

公开(公告)日：2015-02-03

申请号：US12810725

申请日：2009-02-26

申请人： Yoshinobu Baba ,  Koh Ishigami ,  Naoki Okamoto ,  Tomoko Endo

发明人： Yoshinobu Baba ,  Koh Ishigami ,  Naoki Okamoto ,  Tomoko Endo

IPC分类号： G03G9/113 ,  G03G9/08

CPC分类号： G03G9/1133 ,  G03G9/0819 ,  G03G9/0827

摘要： The present invention provides an image of high image quality by using a magnetic carrier coated with a novel coating resin composition. Further, the present invention stably provides a good image which is hardly influenced by environmental fluctuation and long-term use and has a superior stability of a charging amount when left to stand especially under high temperature and high humidity environments. The present invention also provides a magnetic carrier characterized in that a carrier core surface is coated with a copolymer containing at least, as copolymerization components, an acrylic monomer having a specific structure and an acrylic macromonomer having a specific structure.

摘要翻译： 本发明通过使用涂覆有新型涂料树脂组合物的磁性载体提供高图像质量的图像。 此外，本发明稳定地提供了几乎不受环境波动和长期使用影响的良好图像，并且特别是在高温高湿环境下，具有优异的静置时的充电量的稳定性。 本发明还提供一种磁性载体，其特征在于载体芯表面涂覆有至少含有作为共聚组分的具有特定结构的丙烯酸单体和具有特定结构的丙烯酸类大分子单体的共聚物。

公开(公告)号：US20100310978A1

公开(公告)日：2010-12-09

申请号：US12864447

申请日：2009-03-10

申请人： Tomoko Endo ,  Koh Ishigami ,  Naoki Okamoto ,  Yoshinobu Baba

发明人： Tomoko Endo ,  Koh Ishigami ,  Naoki Okamoto ,  Yoshinobu Baba

IPC分类号： G03G9/083

CPC分类号： G03G9/107 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/10 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1133

摘要： Provided is a two-component developer containing: a magnetic carrier obtained by coating a magnetic core with a resin; and toner, in which: the magnetic core contains at least a ferrite component and at least one kind of an oxide selected from the group consisting of SiO2 and Al2O3; the content of the oxide is 4.0 mass % or more and 40.0 mass % or less with respect to the magnetic core; the magnetic core has a specific resistance of 5.0×104 Ω·cm or more and 5.0×108 Ω·cm or less at the time of the application of 1,000 V/cm; the magnetic carrier has an intensity of magnetization in 79.6 kA/m of 40.0 Am2/kg or more and 65.0 Am2/kg or less, and a residual magnetization after the application of an external magnetic field of 79.6 kA/m of 3.0 Am2/kg or less; and the toner has a weight-average particle diameter (D4) of 3.0 gin or more and 10.0 μm or less and an average circularity of 0.940 or more and 0.990 or less.

摘要翻译： 提供了一种双组分显影剂，其包含：通过用树脂涂覆磁芯获得的磁性载体; 和调色剂，其中：所述磁芯至少包含铁氧体组分和至少一种选自SiO 2和Al 2 O 3的氧化物; 相对于磁芯，氧化物的含量为4.0质量％以上且40质量％以下。 磁芯在施加1000V / cm时的电阻率为5.0×104＆OHgr··cm以上且5.0×108Ω·cm·cm以下。 磁性载体的强度为79.6kA / m，为40.0Am 2 / kg以上且65.0Am 2 / kg以下，在施加79.6kA / m 3的外部磁场后的剩余磁化强度为3.0Am 2 / kg 或更少; 调色剂的重均粒径（D4）为3.0gin以上且10.0μm以下，平均圆形度为0.940以上且0.990以下。

公开(公告)号：US20100273103A1

公开(公告)日：2010-10-28

申请号：US12810725

申请日：2009-02-26

申请人： Yoshinobu Baba ,  Koh Ishigami ,  Naoki Okamoto ,  Tomoko Endo

发明人： Yoshinobu Baba ,  Koh Ishigami ,  Naoki Okamoto ,  Tomoko Endo

IPC分类号： G03G9/113 ,  G03G9/107

CPC分类号： G03G9/1133 ,  G03G9/0819 ,  G03G9/0827

摘要： The present invention provides an image of high image quality by using a magnetic carrier coated with a novel coating resin composition. Further, the present invention stably provides a good image which is hardly influenced by environmental fluctuation and long-term use and has a superior stability of a charging amount when left to stand especially under high temperature and high humidity environments. The present invention also provides a magnetic carrier characterized in that a carrier core surface is coated with a copolymer containing at least, as copolymerization components, an acrylic monomer having a specific structure and an acrylic macromonomer having a specific structure.

摘要翻译： 本发明通过使用涂覆有新型涂料树脂组合物的磁性载体提供高图像质量的图像。 此外，本发明稳定地提供了几乎不受环境波动和长期使用影响的良好图像，并且特别是在高温高湿环境下，具有优异的静置时的充电量的稳定性。 本发明还提供一种磁性载体，其特征在于载体芯表面涂覆有至少含有作为共聚组分的具有特定结构的丙烯酸单体和具有特定结构的丙烯酸类大分子单体的共聚物。

公开(公告)号：US09034551B2

公开(公告)日：2015-05-19

申请号：US12864447

申请日：2009-03-10

申请人： Tomoko Endo ,  Koh Ishigami ,  Naoki Okamoto ,  Yoshinobu Baba

发明人： Tomoko Endo ,  Koh Ishigami ,  Naoki Okamoto ,  Yoshinobu Baba

IPC分类号： G03G9/107 ,  G03G9/08 ,  G03G9/10 ,  G03G9/113

CPC分类号： G03G9/107 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/10 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1133

摘要： Provided is a two-component developer containing: a magnetic carrier obtained by coating a magnetic core with a resin; and toner, in which: the magnetic core contains at least a ferrite component and at least one kind of an oxide selected from the group consisting of SiO2 and Al2O3; the content of the oxide is 4.0 mass % or more and 40.0 mass % or less with respect to the magnetic core; the magnetic core has a specific resistance of 5.0×104 Ω·cm or more and 5.0×108 Ω·cm or less at the time of the application of 1,000 V/cm; the magnetic carrier has an intensity of magnetization in 79.6 kA/m of 40.0 Am2/kg or more and 65.0 Am2/kg or less, and a residual magnetization after the application of an external magnetic field of 79.6 kA/m of 3.0 Am2/kg or less; and the toner has a weight-average particle diameter (D4) of 3.0 μm or more and 10.0 μm or less and an average circularity of 0.940 or more and 0.990 or less.

摘要翻译： 提供了一种双组分显影剂，其包含：通过用树脂涂覆磁芯获得的磁性载体; 和调色剂，其中：所述磁芯至少包含铁氧体组分和至少一种选自SiO 2和Al 2 O 3的氧化物; 相对于磁芯，氧化物的含量为4.0质量％以上且40质量％以下。 磁芯在施加1000V / cm时的电阻率为5.0×104＆OHgr·cm以上5.0×10 8Ω·cm·cm以下。 磁性载体的强度为79.6kA / m，为40.0Am 2 / kg以上且65.0Am 2 / kg以下，在施加79.6kA / m 3的外部磁场后的剩余磁化强度为3.0Am 2 / kg 或更少; 调色剂的重均粒径（D4）为3.0μm以上且10.0μm以下，平均圆形度为0.940以上且0.990以下。

公开(公告)号：US08298742B2

公开(公告)日：2012-10-30

申请号：US12741298

申请日：2008-12-18

申请人： Naoki Okamoto ,  Yoshinobu Baba ,  Koh Ishigami ,  Tomoko Endo

发明人： Naoki Okamoto ,  Yoshinobu Baba ,  Koh Ishigami ,  Tomoko Endo

IPC分类号： G03G9/10

CPC分类号： G03G9/1131 ,  G03G9/1075 ,  G03G9/1132

摘要： In a method for coating electrophotographic carrier core surfaces with a resin composition by rotating a rotator having a plurality of agitating blades on its surface in a casing; a coating treatment material that is introduced to a space defined between the rotator and the casing is in a packing of from 50% to 98% by volume; at the time of coating treatment, the electrophotographic carrier core surfaces are coat-treated with the resin composition while being put forward and put backward; and the electrophotographic carrier cores and the resin composition are, at the time of coating treatment, temperature-controlled at a specific temperature T (° C.) or below. This method enables the electrophotographic carrier core surfaces to be more uniformly coated with a coating resin.

摘要翻译： 在通过在壳体的表面上旋转具有多个搅拌叶片的旋转体的用树脂组合物涂布电子摄影载体芯表面的方法中， 引入到旋转体和壳体之间的空间的涂布处理材料的填充量为50体积％至98体积％ 在涂布处理时，将电子照相载体芯表面与树脂组合物进行涂布处理并向后放置; 并且电子照相载体芯和树脂组合物在涂布处理时在特定温度T（℃）或更低温度下进行温度控制。 该方法能够使电子照相载体芯表面更均匀地涂覆有涂覆树脂。

公开(公告)号：US20100279224A1

公开(公告)日：2010-11-04

申请号：US12741298

申请日：2008-12-18

申请人： Naoki Okamoto ,  Yoshinobu Baba ,  Koh Ishigami ,  Tomoko Endo

发明人： Naoki Okamoto ,  Yoshinobu Baba ,  Koh Ishigami ,  Tomoko Endo

IPC分类号： G03G9/10

CPC分类号： G03G9/1131 ,  G03G9/1075 ,  G03G9/1132

摘要： In a method for coating electrophotographic carrier core surfaces with a resin composition by rotating a rotator having a plurality of agitating blades on its surface in a casing; a coating treatment material that is introduced to a space defined between the rotator and the casing is in a packing of from 50% to 98% by volume; at the time of coating treatment, the electrophotographic carrier core surfaces are coat-treated with the resin composition while being put forward and put backward; and the electrophotographic carrier cores and the resin composition are, at the time of coating treatment, temperature-controlled at a specific temperature T (° C.) or below. This method enables the electrophotographic carrier core surfaces to be more uniformly coated with a coating resin.

摘要翻译： 在通过在壳体的表面上旋转具有多个搅拌叶片的旋转体的用树脂组合物涂布电子摄影载体芯表面的方法中， 引入到旋转体和壳体之间的空间的涂布处理材料的填充量为50体积％至98体积％ 在涂布处理时，将电子照相载体芯表面与树脂组合物进行涂布处理并向后放置; 并且电子照相载体芯和树脂组合物在涂布处理时在特定温度T（℃）或更低温度下进行温度控制。 该方法能够使电子照相载体芯表面更均匀地涂覆有涂覆树脂。

公开(公告)号：US07927775B2

公开(公告)日：2011-04-19

申请号：US12691057

申请日：2010-01-21

申请人： Nozomu Komatsu ,  Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Chika Inoue ,  Yoshinobu Baba ,  Takayuki Itakura ,  Tomoko Endo

发明人： Nozomu Komatsu ,  Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Chika Inoue ,  Yoshinobu Baba ,  Takayuki Itakura ,  Tomoko Endo

IPC分类号： G03G9/00

CPC分类号： G03G9/0821 ,  G03G9/0819 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1132 ,  G03G9/1136

摘要： Provided is a magnetic carrier giving a high quality image free of density variation without the occurrence of fogging or carrier adhesion and having excellent dot reproducibility even during long-term use. The magnetic carrier has magnetic carrier particles produced by filling pores of porous magnetic core particles with a resin. The magnetic carrier contains 80% by number or more of the magnetic carrier particles satisfying the specific conditions (a) and (b) when 18 straight lines passing through a reference point of a cross section of the magnetic carrier particle are drawn at intervals of 10° in a reflected electron image of the cross section of the magnetic carrier particle photographed by a scanning electron microscope.

摘要翻译： 本发明提供了一种磁性载体，其具有无密度变化的高质量图像，而不会发生起雾或载体粘附，并且即使在长期使用中也具有优异的点再现性。 磁性载体具有通过用树脂填充多孔磁性核颗粒的孔而产生的磁性载体颗粒。 磁性载体含有80个数量以上的满足特定条件（a）和（b）的磁性载体颗粒，当通过磁性载体颗粒的横截面的参考点的18条直线以10° 在通过扫描电子显微镜拍摄的磁性载体颗粒的横截面的反射电子图像中，

公开(公告)号：US20100119968A1

公开(公告)日：2010-05-13

申请号：US12691057

申请日：2010-01-21

申请人： Nozomu Komatsu ,  Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Chika Inoue ,  Yoshinobu Baba ,  Takayuki Itakura ,  Tomoko Endo

发明人： Nozomu Komatsu ,  Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Chika Inoue ,  Yoshinobu Baba ,  Takayuki Itakura ,  Tomoko Endo

IPC分类号： G03G9/107

CPC分类号： G03G9/0821 ,  G03G9/0819 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1132 ,  G03G9/1136

摘要： Provided is a magnetic carrier giving a high quality image free of density variation without the occurrence of fogging or carrier adhesion and having excellent dot reproducibility even during long-term use. The magnetic carrier has magnetic carrier particles produced by filling pores of porous magnetic core particles with a resin. The magnetic carrier contains 80% by number or more of the magnetic carrier particles satisfying the specific conditions (a) and (b) when 18 straight lines passing through a reference point of a cross section of the magnetic carrier particle are drawn at intervals of 10° in a reflected electron image of the cross section of the magnetic carrier particle photographed by a scanning electron microscope.

摘要翻译： 本发明提供了一种磁性载体，其具有无密度变化的高质量图像，而不会发生起雾或载体粘附，并且即使在长期使用中也具有优异的点再现性。 磁性载体具有通过用树脂填充多孔磁性核颗粒的孔而产生的磁性载体颗粒。 磁性载体含有80个数量以上的满足特定条件（a）和（b）的磁性载体颗粒，当通过磁性载体颗粒的横截面的参考点的18条直线以10° 在通过扫描电子显微镜拍摄的磁性载体颗粒的横截面的反射电子图像中，

公开(公告)号：US07939233B2

公开(公告)日：2011-05-10

申请号：US12691033

申请日：2010-01-21

申请人： Chika Inoue ,  Hiroyuki Fujikawa ,  Koh Ishigami ,  Kunihiko Nakamura ,  Nozomu Komatsu ,  Tomoko Endo ,  Yoshinobu Baba ,  Takayuki Itakura

发明人： Chika Inoue ,  Hiroyuki Fujikawa ,  Koh Ishigami ,  Kunihiko Nakamura ,  Nozomu Komatsu ,  Tomoko Endo ,  Yoshinobu Baba ,  Takayuki Itakura

IPC分类号： G03G9/00

CPC分类号： G03G9/1075 ,  G03G9/0821 ,  G03G9/0827 ,  G03G9/107 ,  G03G9/113 ,  G03G9/1131 ,  G03G9/1132

摘要： A magnetic carrier and a two-component developer are provided which have remedied blank areas, fog after leaving, carrier sticking during running, and image density variations before and after running. The magnetic carrier has magnetic carrier particles having at least porous magnetic core particles and a resin. The magnetic carrier particles satisfying the specific conditions (a), (b) and (c) where, in a reflected electron image of cross sections of the magnetic carrier particles as photographed with a scanning electron microscope, straight lines that divide a cross section of a magnetic carrier particle into 72 at intervals of 5° are drawn from a reference point of the cross section thereof toward the surface of the magnetic carrier particle; the magnetic carrier particles being contained in an amount of 60% by number or more.

摘要翻译： 提供了一种磁性载体和双组分显影剂，其具有空白区域，离开后的雾，运行期间的载体粘附和运行前后的图像密度变化。 磁性载体具有至少具有多孔磁性核颗粒和树脂的磁性载体颗粒。 满足特定条件（a），（b）和（c）的磁性载体颗粒，其中在用扫描电子显微镜拍摄的磁性载体颗粒的横截面的反射电子图像中，分割横截面的直线 以5°的间隔将磁性载体颗粒从其横截面的参考点拉向磁性载体颗粒的表面; 磁性载体颗粒的含量为60％以上。

公开(公告)号：US20100136473A1

公开(公告)日：2010-06-03

申请号：US12691040

申请日：2010-01-21

申请人： Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Nozomu Komatsu ,  Chika Inoue ,  Tomoko Endo ,  Yoshinobu Baba ,  Takayuki Itakura

发明人： Koh Ishigami ,  Hiroyuki Fujikawa ,  Kunihiko Nakamura ,  Nozomu Komatsu ,  Chika Inoue ,  Tomoko Endo ,  Yoshinobu Baba ,  Takayuki Itakura

IPC分类号： G03G9/083

CPC分类号： G03G9/107 ,  G03G9/1075 ,  G03G9/1131 ,  G03G9/1136 ,  G03G9/1139

摘要： A magnetic carrier which has magnetic carrier particles each having at least porous magnetic core particles and a resin, in which, in a backscattered electron image of the magnetic carrier particles, photographed with a scanning electron microscope as taken at an accelerating voltage of 2.0 kV, magnetic carrier particles having area proportion S1 found from a specific expression (1) of from 0.5 area % or more to 8.0 area % or less are in a proportion of 80% by number or more in the magnetic carrier, an average proportion Av1 of the total area of portions having a high luminance which come from a metal oxide on the magnetic carrier particles to the total projected area of the magnetic carrier particles is from 0.5 area % or more to 8.0 area % or less, and an average proportion Av2 found from a specific expression (2) is 10.0 area % or less.

摘要翻译： 具有至少具有多孔磁性核颗粒和树脂的磁性载体颗粒的磁性载体，其中在以2.0kV的加速电压下拍摄的用磁性载体颗粒的背散射电子图像拍摄的扫描电子显微镜， 从磁性载体的0.5面积％以上至8.0面积％以下的特定表达式（1）得到的面积比例S1的磁性载体颗粒的比例为80％以上，平均比例Av1为 来自磁性载体颗粒上的金属氧化物的具有高亮度的部分的总面积相对于磁性载体颗粒的总投影面积为0.5面积％以上至8.0面积％以下，平均比例Av2为 具体表达式（2）为10.0面积％以下。