公开(公告)号：US20170369672A1

公开(公告)日：2017-12-28

申请号：US15544358

申请日：2016-01-26

Applicant: POWDERTECH CO., LTD.

Inventor： Koji AGA ,  Takao SUGIURA

IPC: C08K3/22 ,  C01G49/00 ,  H01F1/11 ,  C08K9/04

CPC classification number: C08K3/22 ,  C01G49/00 ,  C01G49/0072 ,  C08K9/04 ,  C08K2003/2241 ,  C08K2003/2275 ,  C08L101/00 ,  H01F1/112 ,  H01F1/36 ,  H01F1/37

Abstract: An object is to provide a magnetic filler composed of the ferrite particles having a low apparent density, capable of maintaining various properties in a controllable state and a specified volume is filled with a small weight, and a resin molded product made using the magnetic filler. To achieve the object, a magnetic filler composed of the ferrite particles having an outer shell structure containing a Ti oxide and a resin laminate made using the magnetic filler are employed.

公开(公告)号：US20160216643A1

公开(公告)日：2016-07-28

申请号：US15007415

申请日：2016-01-27

Applicant: POWDERTECH CO., LTD.

Inventor： Hiroki SAWAMOTO ,  Tetsuya UEMURA

IPC: G03G9/00

CPC classification number: G03G15/0928 ,  G03G9/10 ,  G03G9/1075 ,  G03G9/1131 ,  G03G9/1132 ,  G03G9/1138

Abstract: An object of the present invention is to provide a carrier in which decrease in specific gravity is achieved and a volatile organic compound (VOC) is reduced and to provide an electrophotographic developer using the carrier. There is provided a carrier including a core material coated with a resin, the core material including a magnetic component and a nonmagnetic component, wherein the sum total of volatile organic compounds is 1 ppb or more and 1.5 ppm or less. There is also provided an electrophotographic developer using the carrier.

Abstract translation: 本发明的目的是提供一种其中实现比重降低并且挥发性有机化合物（VOC）减少并使用载体提供电子照相显影剂的载体。 提供了一种载体，其包括涂覆有树脂的芯材，该芯材包括磁性组分和非磁性组分，其中挥发性有机化合物的总和为1ppb以上且1.5ppm以下。 还提供了使用载体的电子照相显影剂。

公开(公告)号：US09201329B2

公开(公告)日：2015-12-01

申请号：US13738324

申请日：2013-01-10

Applicant: Powdertech Co., Ltd.

Inventor： Koji Aga ,  Makoto Ishikawa ,  Masashi Aoki

IPC: G03G9/10 ,  G03G9/107

CPC classification number: G03G9/1075 ,  G03G9/107

Abstract: A porous ferrite core material for an electrophotographic developer wherein the apparent density thereof is 1.5 to 1.9 g/cm3, the shape factor SF-2 thereof is 101 to 110 and the magnetization as measured with a VSM at 1K·1000/4π·A/m is 40 to 60 Am2/kg, a resin-coated ferrite carrier for an electrophotographic developer obtained by coating the surface of the porous ferrite core material with a resin, and an electrophotographic developer using the ferrite carrier.

Abstract translation: 一种用于电子照相显影剂的多孔铁氧体芯材料，其表观密度为1.5至1.9g / cm 3，其形状系数SF-2为101至110，并且以1K·1000/4＆amp; / m为40〜60Am 2 / kg，通过用树脂涂布多孔铁素体芯材的表面而得到的电子照相显影剂用树脂被覆铁氧体载体和使用该铁氧体载体的电子照相显影剂。

公开(公告)号：US09201328B2

公开(公告)日：2015-12-01

申请号：US14219162

申请日：2014-03-19

Applicant: POWDERTECH CO., LTD.

Inventor： Hiroki Sawamoto ,  Takao Sugiura

IPC: G03G9/00 ,  G03G9/10 ,  G03G9/113 ,  G03G9/107

CPC classification number: G03G9/10 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1132

Abstract: Disclosed are a resin-filled ferrite carrier core material for an electrophotographic developer, including a porous ferrite particle having an average compression strength of 100 mN or more and a coefficient of variation of the compression strength of 50% or less, a ferrite carrier obtained by filling a resin in the voids of the ferrite carrier core material, and an electrophotographic developer using the ferrite carrier.

Abstract translation: 公开了一种用于电子照相显影剂的树脂填充铁氧体载体芯材，包括平均抗压强度为100mN以上，压缩强度变化系数为50％以下的多孔铁氧体颗粒，通过 在铁氧体载体芯材料的空隙中填充树脂，以及使用铁素体载体的电子照相显影剂。

公开(公告)号：US20150277255A1

公开(公告)日：2015-10-01

申请号：US14673557

申请日：2015-03-30

Applicant: POWDERTECH CO., LTD.

Inventor： Hiroki SAWAMOTO ,  Takao SUGIURA

IPC: G03G9/10

CPC classification number: G03G9/10 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1131 ,  G03G9/1136 ,  G03G9/1138

Abstract: There is provided a resin-filled ferrite carrier for an electrophotographic developer, in which a void of a porous ferrite particle used as a ferrite carrier core material is filled with silicone resin, wherein a true specific gravity (Y) of the porous ferrite particle filled with the silicone resin and a Si/Fe value (X) measured by fluorescent X-ray elemental analysis satisfy the following inequality (1): −350X≦Y−4.83≦−100X  (1).

Abstract translation: 提供一种用于电子照相显影剂的树脂填充铁氧体载体，其中用作铁氧体载体芯材料的多孔铁氧体颗粒的空隙填充有硅树脂，其中填充的多孔铁氧体颗粒的真比重（Y） 与硅酮树脂和通过荧光X射线元素分析测量的Si / Fe值（X）满足以下不等式（1）：-350X＆lt; 1lE; Y-4.83＆nlE; -100X（1）。

公开(公告)号：US20140295342A1

公开(公告)日：2014-10-02

申请号：US14227564

申请日：2014-03-27

Applicant: POWDERTECH CO., LTD.

Inventor： Makoto ISHIKAWA ,  Tetsuya UEMURA ,  Masashi AOKI

IPC: G03G9/113

CPC classification number: G03G9/1132 ,  G03G9/1075 ,  G03G9/1133 ,  G03G9/1134 ,  G03G9/1135 ,  G03G9/1136

Abstract: Provided is a resin-coated carrier for an electrophotographic developer, wherein the surface of a magnetic particle is coated with a mixed resin composed of two resins, and when the two resins are denoted by the resin 1 and the resin 2, respectively, the relative difference between the respective adsorbed moisture amounts of the resin 1 and the resin 2 at a temperature of 30° C. and a relative humidity of 80% satisfies the following formula (1): 1≦|ax−b(100−x)|≦10  (1) a: the adsorbed moisture content (% by weight) of the resin 1 b: the adsorbed moisture content (% by weight) of the resin 2 x: the content percentage of the resin 1 (0

Abstract translation: 提供一种用于电子照相显影剂的树脂涂覆载体，其中磁性颗粒的表面涂覆有由两种树脂组成的混合树脂，并且当两种树脂分别由树脂1和树脂2表示时，相对 在30℃，相对湿度80％的树脂1和树脂2的各吸附水分量之间的差别满足下式（1）：1＆nlE; | ax-b（100-x）| ＆lt; nlE; 10（1）a：树脂1b的吸附水分含量（重量％）b：树脂吸附的水分含量（重量％）2 x：树脂1的含量百分比（0

公开(公告)号：US20140287355A1

公开(公告)日：2014-09-25

申请号：US14219162

申请日：2014-03-19

Applicant: POWDERTECH CO., LTD.

Inventor： Hiroki SAWAMOTO ,  Takao SUGIURA

IPC: G03G9/10 ,  G03G9/113

CPC classification number: G03G9/10 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1132

Abstract: Disclosed are a resin-filled ferrite carrier core material for an electrophotographic developer, including a porous ferrite particle having an average compression strength of 100 mN or more and a coefficient of variation of the compression strength of 50% or less, a ferrite carrier obtained by filling a resin in the voids of the ferrite carrier core material, and an electrophotographic developer using the ferrite carrier.

Abstract translation: 公开了一种用于电子照相显影剂的树脂填充铁氧体载体芯材，包括平均抗压强度为100mN以上，压缩强度变化系数为50％以下的多孔铁氧体颗粒，通过 在铁氧体载体芯材料的空隙中填充树脂，以及使用铁素体载体的电子照相显影剂。

公开(公告)号：US20020172884A1

公开(公告)日：2002-11-21

申请号：US10045010

申请日：2002-01-15

Applicant: POWDERTECH CO., LTD.

Inventor： Kanao Kayamoto ,  Issei Shinmura ,  Yuji Sato

IPC: G03G009/107

CPC classification number: G03G9/10 ,  G03G9/107 ,  G03G9/1075 ,  G03G9/1132

Abstract: A carrier for an electrophotographic developer comprising spherical magnetic core particles which have a volume average particle size of 25 to 45 nullm, an average void size of 10 to 20 nullm, a volume based particle size distribution having less than 1% of 22 nullm or smaller particles, a magnetization of 67 to 88 emu/g in a magnetic field of 1 kOe, and a difference of 10 emu/g or smaller in magnetization in a magnetic field of 1 kOe between scattered particles and remaining particles.

Abstract translation: 一种电子照相显影剂用载体，其包含体积平均粒径为25〜45μm，平均孔径为10〜20μm的球状磁性核颗粒，体积基准粒径分布小于22μm或更小的1％ 颗粒，在1kOe的磁场中的磁化强度为67至88emu / g，散射颗粒与剩余颗粒之间在1kOe的磁场中的磁化强度为10emu / g或更小。

公开(公告)号：US20020006570A1

公开(公告)日：2002-01-17

申请号：US09780519

申请日：2001-02-12

Applicant: POWDERTECH, CO., LTD.

Inventor： Kanao Kayamoto ,  Kazunori Takagi ,  Yuji Sato

IPC: G03G009/113

CPC classification number: G03G9/1139 ,  G03G9/1075

Abstract: A carrier for an electrophotographic developer which comprises a carrier core and a resin coat having a conducting agent dispersed therein, the resin coat having an inner layer on the carrier core side and an outer layer coating the inner layer, wherein the inner layer contains 7 to 20% by weight of a conducting agent based on the resinous solid content of the inner layer, the outer layer contains 3 to 15% by weight of a conducting agent based on the resinous solid content of the outer layer, and the conducting agent content of the inner layer is greater than that of the outer layer.

Abstract translation: 一种用于电子照相显影剂的载体，其包含载体芯和其中分散有导电剂的树脂涂层，所述树脂涂层在载体芯侧具有内层，涂覆有所述内层的外层，其中所述内层包含7〜 20重量％的导电剂，基于内层的树脂固体成分，外层含有3〜15重量％的导电剂，基于外层的树脂固含量，导电剂含量 内层大于外层的内层。