公开(公告)号：US10258970B2

公开(公告)日：2019-04-16

申请号：US15544665

申请日：2016-01-26

Applicant: POWDERTECH CO., LTD.

Inventor： Koji Aga ,  Takao Sugiura

IPC: B01J23/00 ,  B01J23/745 ,  B01J23/889 ,  B01J23/89 ,  B01J32/00 ,  B01J35/00 ,  C01G23/047 ,  C01G49/00 ,  G03G9/107 ,  G03G9/113 ,  B01J35/02 ,  B01J37/08 ,  B01J37/16 ,  B01J37/00 ,  B01J37/02

Abstract: An object of the present invention is to provide ferrite particles for supporting a catalyst having a small apparent density, various properties are maintained in a controllable state and a specified volume is filled with a small weight, and a catalyst using the ferrite particles for supporting a catalyst. To achieve the object, ferrite particles for supporting a catalyst provided with an outer shell structure containing Ti oxide, a catalyst using the ferrite particles for supporting a catalyst are employed.

公开(公告)号：US10248039B2

公开(公告)日：2019-04-02

申请号：US15696698

申请日：2017-09-06

Applicant: POWDERTECH CO., LTD.

Inventor： Hiroki Sawamoto ,  Hajime Akiba ,  Tetsuya Uemura

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

Abstract: An object of the present invention is to provide a carrier low in specific gravity and less in both environmental fluctuation and change of the charge amount after aging, an electrophotographic developer using the carrier, and a method of manufacturing the carrier. To achieve the object, the carrier is manufactured by coating a core material composed of a magnetic component and a non-magnetic component with a resin, and the carrier is characterized in that water content is 200 ppm or less and cyclic siloxane content is 100 ppb or less. Further, an electrophotographic developer containing the carrier is provided.

公开(公告)号：US09372426B2

公开(公告)日：2016-06-21

申请号：US14785676

申请日：2015-01-16

Applicant: POWDERTECH CO., LTD.

Inventor： Koji Aga

IPC: G03G9/00 ,  G03G9/107 ,  G03G9/08 ,  G03G9/113

CPC classification number: G03G9/1075 ,  C01G49/0036 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/42 ,  G03G9/0819 ,  G03G9/107 ,  G03G9/1131

Abstract: It is an object of the present invention to provide a ferrite particle having a low apparent density, and being capable of maintaining various properties thereof in controllable states and filling a fixed volume in a small weight thereof, a ferrite carrier core material and a ferrite carrier for an electrophotographic developer using the ferrite particle, and the like. In order to achieve the object, there are employed the ferrite particle having a porous structure in the interior thereof and an outer shell structure on the outer periphery thereof, the ferrite carrier core material and the ferrite carrier for an electrophotographic developer using the ferrite particle, and an electrophotographic developer using the ferrite carrier.

Abstract translation: 本发明的目的是提供一种表观密度低的铁氧体颗粒，并且能够将其各种性能保持在可控状态并以小重量填充固定体积，铁氧体载体芯材和铁氧体载体 对于使用铁氧体颗粒的电子照相显影剂等。 为了实现该目的，在其内部使用具有多孔结构的铁氧体颗粒和其外周上的外壳结构，铁氧体载体芯材和使用铁氧体颗粒的电子照相显影剂的铁氧体载体， 和使用该铁氧体载体的电子照相显影剂。

公开(公告)号：US09329515B2

公开(公告)日：2016-05-03

申请号：US14227564

申请日：2014-03-27

Applicant: POWDERTECH CO., LTD.

Inventor： Makoto Ishikawa ,  Tetsuya Uemura ,  Masashi Aoki

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

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：US20160044838A1

公开(公告)日：2016-02-11

申请号：US14780715

申请日：2014-03-18

Applicant: POWDERTECH CO., LTD.

Inventor： Koji AGA ,  Tetsuya IGARASHI

IPC: H05K9/00 ,  H01F1/20 ,  H01F1/147 ,  B22F1/00

CPC classification number: H05K9/0075 ,  B22F1/0003 ,  B22F1/02 ,  C22C2202/02 ,  H01F1/14766 ,  H01F1/20 ,  H01F1/26

Abstract: The object is to provide a composite magnetic powder for noise suppression to give a noise suppressor having ability to suppress the noise in a wide range from a low frequency through a high frequency while suppressing heat generation by reducing a dielectric constant loss on the high frequency side, and in order to attain the object, there is employed a composite magnetic powder for noise suppression in which the surface of a metallic powder is coated with a fine particle having a high dielectric constant and a binder resin or the like. By using this composite magnetic powder for noise suppression, there can be provided a noise suppressor excellent in ability to suppress the noise in a wide frequency region.

Abstract translation: 本发明的目的是提供一种用于噪声抑制的复合磁粉，以提供具有从低频到高频抑制宽范围内的噪声的噪声抑制器，同时通过降低高频侧的介电常数损失来抑制发热 为了达到上述目的，采用了用金属粉末的表面涂布高介电常数的微粒和粘结剂树脂等的噪声抑制用复合磁粉。 通过使用该复合磁粉进行噪声抑制，可以提供在宽频率区域抑制噪声的能力优异的噪声抑制器。

公开(公告)号：US20150277256A1

公开(公告)日：2015-10-01

申请号：US14671710

申请日：2015-03-27

Applicant: POWDERTECH CO., LTD.

Inventor： Hiroki SAWAMOTO ,  Hiromichi KOBAYASHI

IPC: G03G9/113 ,  C01G49/00 ,  H01F1/01 ,  G03G9/10

CPC classification number: H01F1/01 ,  C01G49/0072 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/42 ,  G03G9/107 ,  G03G9/1075 ,  H01F1/36 ,  Y10T428/2982

Abstract: There is provided a ferrite carrier core material for an electrophotographic developer, which includes ferrite particles. A volume average particle diameter of the ferrite particles is from 10 μm to less than 20 μm. Also, there is provided a ferrite core which includes the ferrite carrier core material, and a resin coating a surface of the ferrite carrier core material. Further, there is provided an electrophotographic developer which includes the ferrite carrier; and a toner, wherein a concentration of the toner is from 15 to 35 wt %.

Abstract translation: 提供了一种用于电子照相显影剂的铁氧体载体芯材料，其包括铁氧体颗粒。 铁氧体颗粒的体积平均粒径为10μm至小于20μm。 此外，还提供了一种铁氧体磁芯，其包括铁氧体载体芯材，以及涂覆铁氧体载体芯材表面的树脂。 此外，提供了包括铁氧体载体的电子照相显影剂; 和调色剂的浓度为15〜35重量％的调色剂。

公开(公告)号：US20130183614A1

公开(公告)日：2013-07-18

申请号：US13738324

申请日：2013-01-10

Applicant: Powdertech Co., Ltd.

Inventor： Koji AGA ,  Makoto ISHIKAWA ,  Masashi AOKI

IPC: 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，其形状因子SF-2为101至110，并且以1K·1000 / 4pi·A / 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：US20040248015A1

公开(公告)日：2004-12-09

申请号：US10861083

申请日：2004-06-04

Applicant: MITSUI MINING & SMELTING CO., LTD. ,  POWDERTECH CO., LTD.

Inventor： Yoichi Kamikoriyama ,  Kenji Suzuoka ,  Takashi Nakashima ,  Kazuya Kinoshita ,  Yuji Sato ,  Hiromichi Kobayashi ,  Takeshi Gondo ,  Takashi Hikichi

IPC: G03F009/00

CPC classification number: G03G9/107 ,  G03G9/1131 ,  G03G9/1132 ,  G03G9/1135 ,  G03G9/1136 ,  G03G9/1137 ,  G03G9/1139

Abstract: Provided are a carrier for electrophotography developers prepared with generating a slight amount of byproducts such as water, alcohol, etc, which carrier is free from release of a magnetic powder, has excellent mechanical strength and durability, and good environmental stability, and further can restrain occurrence of toner spent condition and has favorable fluidity and excellent capability of imparting charging to a toner, a two-component developer comprising the carrier and a method for forming an image using the developer. The carrier for electrophotography developers of the invention comprises a magnetic powder dispersed binder resin, the binder resin material comprises (A) a polysiloxane compound having an epoxy group as a functional group and (B) a polysiloxane compound having a group capable of ring-opening addition reaction with the epoxy group of the polysiloxane compound (A), and the binder resin is a silicone resin prepared by curing with ring-opening addition reaction of the epoxy resin. The developer of the invention comprises the carrier for electrophotography developers and the toner particle. The method for forming an image according to the invention comprises developing a static latent image by the developer with an alternating electric field.

Abstract translation: 提供了一种电子照相显影剂的载体，其制备了少量副产物如水，醇等，该载体不含磁性粉末的释放，具有优异的机械强度和耐久性，以及良好的环境稳定性，并且还可以抑制 调色剂消耗状况的发生，并且具有良好的流动性和对调色剂充电的优异能力，包含载体的双组分显影剂和使用显影剂形成图像的方法。 本发明的电子照相显影剂载体包括磁粉分散的粘合剂树脂，粘合剂树脂材料包含（A）具有环氧基作为官能团的聚硅氧烷化合物和（B）具有开环基团的聚硅氧烷化合物 与聚硅氧烷化合物（A）的环氧基的加成反应，粘合剂树脂是通过环氧树脂的开环加成反应固化而制备的硅树脂。 本发明的显影剂包括用于电子照相显影剂的载体和调色剂颗粒。 根据本发明的形成图像的方法包括用交变电场显影显影剂的静电潜像。

公开(公告)号：US20020177061A1

公开(公告)日：2002-11-28

申请号：US10059004

申请日：2002-01-30

Applicant: POWDERTECH CO., LTD.

Inventor： Hiromichi Kobayashi ,  Tsuyoshi Itagoshi ,  Yasuhiko Kataoka ,  Yuji Sato

IPC: G03G009/113

CPC classification number: G03G9/107 ,  G03G9/1075 ,  G03G9/1131 ,  G03G9/1136

Abstract: A carrier for an electrophotographic developer which has a flowability index F1, represented by formula (1), of 63 to 75 sec/(50nullcm3) and a flowability index F2, represented by formula (2), of 30 to 100 Oenullg/cm3:F1nullADnullFRnullnull(1)F2nullADnullHcnullnull(2)wherein AD is an apparent density (g/cm3); FR is a flow rate (sec/50 g); and Hc is a coercive force (Oe).

Abstract translation: 具有由式（1）表示的流动指数F1为63〜75秒/（50.cm 3）的电子照相显影剂载体和由式（2）表示的流动指数F2为30〜100Oe。 g / cm3：<段落lvl =“0”> F1 = ADxFR（1） <段落lvl =“0”> F2 = ADxHc（2）其中AD为表观密度（g / cm3）; FR为流速（sec / 50g）; Hc是矫顽力（Oe）。

公开(公告)号：US12204280B2

公开(公告)日：2025-01-21

申请号：US17430440

申请日：2020-02-13

Applicant: POWDERTECH CO., LTD.

Inventor： Aya Sakuta ,  Makoto Ishikawa ,  Hiroki Sawamoto ,  Tetsuya Uemura

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

Abstract: The present invention relates to a carrier including: a magnetic core material; and a resin coating layer coating a surface of the magnetic core material, in which the resin coating layer contains a binder resin, and fluorine element-containing resin particles dispersed in the binder resin, the resin coating layer has a coefficient of variation of a film thickness of 25% or less, and the resin coating layer has an average value of the number of the fluorine element-containing resin particles being 3 particles/μm2 or more and 350 particles/μm2 or less per unit area in a cross section of the resin coating layer, and has a coefficient of variation thereof being 20% or less.