公开(公告)号：US20090311617A1

公开(公告)日：2009-12-17

申请号：US12484318

申请日：2009-06-15

申请人： Shinji Uemoto ,  Hiromitsu Misawa ,  Ryo Iwai ,  Naoki Uchida ,  Koso Aoki ,  Kazuya Fujita ,  Kaori Kinoshita ,  Kazushi Takama ,  Eiichi Kurita

发明人： Shinji Uemoto ,  Hiromitsu Misawa ,  Ryo Iwai ,  Naoki Uchida ,  Koso Aoki ,  Kazuya Fujita ,  Kaori Kinoshita ,  Kazushi Takama ,  Eiichi Kurita

IPC分类号： G03G9/083

CPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/1135 ,  G03G9/1136

摘要： The present invention relates to black magnetic iron oxide particles having an average particle diameter of 0.05 to 2.0 μm and an electric resistance value at an applied voltage of 100 V of not less than 1×108 Ω·m; and a magnetic carrier for electrophotographic developer comprising spherical magnetic composite particles obtained by dispersing black magnetic iron oxide particles in a binder resin, wherein the magnetic carrier has an electric resistance value R100 at an applied voltage of 100 V of 1×108 to 1×1014 Ω·m, and an electric resistance value R300 at an applied voltage of 300 V which satisfies the relationship represented by the formula: 0.1≦R300/R100≦1.

摘要翻译： 本发明涉及平均粒径为0.05〜2.0μm的黑色磁性氧化铁颗粒，100V的施加电压下的电阻值不小于1×10 8Ω·m。 和一种用于电子照相显影剂的磁性载体，其包含通过将黑色磁性氧化铁颗粒分散在粘合剂树脂中而获得的球形磁性复合颗粒，其中该磁性载体在100V的施加电压为1×10 8至1×10 14Ω·m的电阻值R100， 以及在300V的施加电压下的电阻值R300，其满足由下式表示的关系：0.1R300 / R100

公开(公告)号：US09285698B2

公开(公告)日：2016-03-15

申请号：US12484318

申请日：2009-06-15

申请人： Shinji Uemoto ,  Hiromitsu Misawa ,  Ryo Iwai ,  Naoki Uchida ,  Koso Aoki ,  Kazuya Fujita ,  Kaori Kinoshita ,  Kazushi Takama ,  Eiichi Kurita

发明人： Shinji Uemoto ,  Hiromitsu Misawa ,  Ryo Iwai ,  Naoki Uchida ,  Koso Aoki ,  Kazuya Fujita ,  Kaori Kinoshita ,  Kazushi Takama ,  Eiichi Kurita

IPC分类号： G03G9/083 ,  G03G9/107 ,  G03G9/113

CPC分类号： G03G9/107 ,  G03G9/113 ,  G03G9/1135 ,  G03G9/1136

摘要： Black magnetic iron oxide particles having an average particle diameter of 0.05 to 2.0 μm and an electric resistance value at an applied voltage of 100 V of not less than 1×108 Ω·cm. Also a magnetic carrier for electrophotographic developer having spherical magnetic composite particles obtained by dispersing black magnetic iron oxide particles in a binder resin. The magnetic carrier has an electric resistance value R100 at an applied voltage of 100 V of 1×108 to 1×1014 Ω·cm, and an electric resistance value R300 at an applied voltage of 300 V which satisfies the relationship represented by the formula: 0.1≦R300/R100≦1.

摘要翻译： 平均粒径为0.05〜2.0μm，施加电压为100V的电阻值为1×10 8Ω·cm·cm以上的黑色磁性氧化铁粒子。 还有一种用于电子照相显影剂的磁性载体，其具有通过将黑色磁性氧化铁颗粒分散在粘合剂树脂中而获得的球形磁性复合颗粒。 磁载体在100V的施加电压为1×108〜1×1014＆OHgr·cm时具有电阻值R100，在300V的施加电压下的电阻值R300满足式 ：0.1＆nlE; R300 / R100＆nlE; 1。

公开(公告)号：US08673529B2

公开(公告)日：2014-03-18

申请号：US13377904

申请日：2010-06-15

申请人： Kaori Kinoshita ,  Shinji Uemoto ,  Eiichi Kurita

发明人： Kaori Kinoshita ,  Shinji Uemoto ,  Eiichi Kurita

IPC分类号： G03G9/113

CPC分类号： G03G9/1131 ,  G03G9/107 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1137

摘要： The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical composite particles comprising spherical composite core particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin and having an average particle diameter of 1 to 100 μm, and a melamine resin coating layer formed on the respective core particles, wherein a ratio of R100 to R300 (R100/R300) in which R100 is an electric resistance value as measured when applying a voltage of 100 V to the magnetic carrier; and R300 is an electric resistance value as measured when applying a voltage of 300 V to the magnetic carrier, is controlled to lie within the range of 1 to 50. The magnetic carrier according to the present invention is capable of maintaining an adequate electric resistance value upon development, providing images having an excellent image quality, exhibiting a good durability, obtaining a good reproducibility of uniform solid image portions having a high image density, and keeping high quality images having an excellent gradation for a long period of time.

摘要翻译： 本发明涉及一种用于电子照相显影剂的磁性载体，其包含球形复合颗粒，该球形复合颗粒包含至少包含铁磁性氧化铁细颗粒和固化的酚醛树脂的平均粒径为1-100μm的球形复合芯颗粒和三聚氰胺树脂 形成在各个芯粒子上的涂层，其中R100与R300（R100 / R300）的比率，其中R100是当向磁性载体施加100V的电压时测量的电阻值; R300是向磁性载体施加300V的电压时测定的电阻值，被控制在1〜50的范围内。本发明的磁性载体能够保持足够的电阻值 在显影时，提供具有优异图像质量的图像，表现出良好的耐久性，获得具有高图像浓度的均匀立体图像部分的良好再现性，并且保持长时间具有优异灰度的高质量图像。

公开(公告)号：US20120115078A1

公开(公告)日：2012-05-10

申请号：US13377904

申请日：2010-06-15

申请人： Kaori Kinoshita ,  Shinji Uemoto ,  Eiichi Kurita

发明人： Kaori Kinoshita ,  Shinji Uemoto ,  Eiichi Kurita

IPC分类号： G03G9/113

CPC分类号： G03G9/1131 ,  G03G9/107 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1137

摘要： The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical composite particles comprising spherical composite core particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin and having an average particle diameter of 1 to 100 μm, and a melamine resin coating layer formed on the respective core particles, wherein a ratio of R100 to R300 (R100/R300) in which R100 is an electric resistance value as measured when applying a voltage of 100 V to the magnetic carrier; and R300 is an electric resistance value as measured when applying a voltage of 300 V to the magnetic carrier, is controlled to lie within the range of 1 to 50. The magnetic carrier according to the present invention is capable of maintaining an adequate electric resistance value upon development, providing images having an excellent image quality, exhibiting a good durability, obtaining a good reproducibility of uniform solid image portions having a high image density, and keeping high quality images having an excellent gradation for a long period of time.

摘要翻译： 本发明涉及一种用于电子照相显影剂的磁性载体，其包含球形复合颗粒，该球形复合颗粒包含至少包含铁磁性氧化铁细颗粒和固化酚醛树脂的平均粒径为1至100μm的球形复合芯颗粒和三聚氰胺树脂 形成在各个芯粒子上的涂层，其中R100与R300（R100 / R300）的比率，其中R100是当向磁性载体施加100V的电压时测量的电阻值; R300是向磁性载体施加300V的电压时测定的电阻值，被控制在1〜50的范围内。本发明的磁性载体能够保持足够的电阻值 在显影时，提供具有优异图像质量的图像，表现出良好的耐久性，获得具有高图像浓度的均匀立体图像部分的良好再现性，并且保持长时间具有优异灰度的高质量图像。

公开(公告)号：US09606467B2

公开(公告)日：2017-03-28

申请号：US13375581

申请日：2010-06-04

申请人： Katsuji Iwami ,  Shigenori Harada ,  Eiichi Kurita ,  Kaori Kinoshita

发明人： Katsuji Iwami ,  Shigenori Harada ,  Eiichi Kurita ,  Kaori Kinoshita

IPC分类号： G03G9/107 ,  G03G9/113

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

摘要： 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.

公开(公告)号：US20140065535A1

公开(公告)日：2014-03-06

申请号：US14111587

申请日：2012-04-12

申请人： Kaori Kinoshita ,  Eiichi Kurita

发明人： Kaori Kinoshita ,  Eiichi Kurita

IPC分类号： G03G9/107 ,  G03G9/08

CPC分类号： G03G9/107 ,  G03G9/0804 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1133 ,  G03G9/1135 ,  G03G9/1136

摘要： The present invention provides a magnetic carrier for an electrophotographic developer which has an excellent durability and a stable charging property and is free from occurrence of spent toner thereonto, and a two-component system developer comprising the magnetic carrier for an electrophotographic developer and a toner. The present invention relates to a core material of a magnetic carrier for an electrophotographic developer comprising spherical composite particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin and having an average particle diameter of 1 to 100 μm, a resin index of the spherical composite particles being within the range of 35 to 80%, and a magnetic carrier obtained by coating a surface of respective particles of the magnetic carrier core material with a resin.

摘要翻译： 本发明提供一种用于电子照相显影剂的磁性载体，其具有优异的耐久性和稳定的带电性，并且不会在其上发生废色调剂;以及包含用于电子照相显影剂的磁性载体和调色剂的双组分体系显影剂。 本发明涉及一种用于电子照相显影剂的磁性载体的芯材，其包含至少包含铁磁性氧化铁微粒和固化酚醛树脂的球形复合颗粒，其平均粒径为1-100μm，树脂指数为 球形复合颗粒在35至80％的范围内，以及通过用树脂涂覆磁性载体芯材的各个颗粒的表面而获得的磁性载体。

公开(公告)号：US09778586B2

公开(公告)日：2017-10-03

申请号：US14111587

申请日：2012-04-12

申请人： Kaori Kinoshita ,  Eiichi Kurita

发明人： Kaori Kinoshita ,  Eiichi Kurita

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

CPC分类号： G03G9/107 ,  G03G9/0804 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1133 ,  G03G9/1135 ,  G03G9/1136

摘要： The present invention provides a magnetic carrier for an electrophotographic developer which has an excellent durability and a stable charging property and is free from occurrence of spent toner thereonto, and a two-component system developer comprising the magnetic carrier for an electrophotographic developer and a toner. The present invention relates to a core material of a magnetic carrier for an electrophotographic developer comprising spherical composite particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin and having an average particle diameter of 1 to 100 μm, a resin index of the spherical composite particles being within the range of 35 to 80%, and a magnetic carrier obtained by coating a surface of respective particles of the magnetic carrier core material with a resin.

公开(公告)号：US20120129087A1

公开(公告)日：2012-05-24

申请号：US13375581

申请日：2010-06-04

申请人： Katsuji Iwami ,  Shigenori Harada ,  Eiichi Kurita ,  Kaori Kinoshita

发明人： Katsuji Iwami ,  Shigenori Harada ,  Eiichi Kurita ,  Kaori Kinoshita

IPC分类号： G03G9/107 ,  G03G9/113

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

摘要： 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.

摘要翻译： 本发明涉及一种电子照相显影剂用磁性载体，其包含作为粘合剂的酚醛树脂和通过酚醛树脂彼此结合的铁磁性氧化铁颗粒的球形磁性复合颗粒，其中球形磁性复合颗粒具有十点平均值 粗糙度Rz为0.3〜2.0μm。 根据本发明的电子照相显影剂的磁性载体显示出对其上形成的涂料树脂的剥离和磨损的耐久性以及施加在载体上的机械应力的高稳定性，不会发生废色调剂，可以稳定地 长时间保持，而不会发生调色剂图像的雾化和不均匀性，并且可以长时间保持具有优异灰度的高质量图像。

公开(公告)号：US06721048B2

公开(公告)日：2004-04-13

申请号：US09922845

申请日：2001-08-07

申请人： Kazumi Yokota ,  Kaori Kinoshita

发明人： Kazumi Yokota ,  Kaori Kinoshita

IPC分类号： G01J342

CPC分类号： G01J3/36 ,  G01J1/04 ,  G01J3/0254 ,  G01N2201/065

摘要： In a detector for spectrometry attached to an integrating sphere, a plurality of detection elements having different spectral sensitivity characteristics is arranged side by side in the same plane on a base, and a side cover is provided such that the detection elements receive light. Thus, the measurement light is directly irradiated to the respective detection elements. Accordingly, the detector for spectrometry has a fast response speed and is excellent in the sensitivity characteristics in a wide wavelength region in the near-infrared area.

摘要翻译： 在附着于积分球的光谱测定装置中，具有不同光谱灵敏度特性的多个检测元件并排设置在基座的同一平面上，并且设置侧盖，使得检测元件接收光。 因此，测量光直接照射到各个检测元件。 因此，用于光谱测定的检测器具有快速的响应速度，并且在近红外区域的宽波长区域中的灵敏度特性优异。