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公开(公告)号：US20180267416A1
公开(公告)日：2018-09-20
申请号：US15916896
申请日：2018-03-09
Applicant: Konica Minolta, Inc.
Inventor： Satoshi UCHINO , Shinya OBARA , Futoshi KADONOME
CPC classification number: G03G9/0825 , C01F17/0012 , C01G23/003 , C01G23/006 , C01P2004/32 , C01P2004/64 , G03G9/0819 , G03G9/08711 , G03G9/08755 , G03G9/08795 , G03G9/08797 , G03G9/09321 , G03G9/09708
Abstract: A toner for developing electrostatic images, including toner particles containing an external additive on surfaces of toner matrix particles. The external additive contains at least a lanthanum-containing titanate compound.
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公开(公告)号：US20170123334A1
公开(公告)日：2017-05-04
申请号：US15282177
申请日：2016-09-30
Applicant: Konica Minolta, Inc.
Inventor： Noriyuki KIMPARA , Satoshi UCHINO , Shinya OBARA , Futoshi KADONOME , Ikuko SAKURADA , Takuya TAKAHASHI
CPC classification number: G03G9/08755 , G03G9/0819 , G03G9/08788 , G03G9/08797 , G03G9/09791
Abstract: An electrostatic latent image developing toner of the present invention includes toner base particles and particles containing a fatty acid metal salt. The toner base particles contain a crystalline resin containing a segment of a first resin and a segment of a second resin chemically bonded to each other and an amorphous resin containing at least the second resin. The crystalline resin is a hybrid crystalline polyester resin. The first resin is a crystalline polyester resin. The second resin is an amorphous resin. The volume-based median diameter (Da) of the toner base particles and the volume-based median diameter (Db) of the particles containing the fatty acid metal salt satisfy the relations represented by Expressions (1) and (2) below: 0.5 μm≦Db≦2.0 μm Expression (1) 0.1 Db/Da≦0.5. Expression (2)
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公开(公告)号：US20200292952A1
公开(公告)日：2020-09-17
申请号：US16793401
申请日：2020-02-18
Applicant: Konica Minolta, Inc.
Inventor： Kenshi MIYAJIMA , Shinya OBARA , Ikuko SAKURADA
Abstract: A toner for electrostatic charge image development is a toner for electrostatic charge image development including toner particles containing a binder resin and an external additive, wherein the binder resin contains a crystalline polyester resin and an amorphous polyester resin, the external additive includes Al—Si composite oxide particles, and a Si element content of the Al—Si composite oxide particles is in the range of 50 to 90 mass % and a Si element ratio on surfaces of the Al—Si composite oxide particles is in the range of 3 to 35 at %.
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公开(公告)号：US20170123332A1
公开(公告)日：2017-05-04
申请号：US15274304
申请日：2016-09-23
Applicant: Konica Minolta, Inc.
Inventor： Satoshi UCHINO , Shinya OBARA , Futoshi KADONOME , Noriyuki KIMPARA , Ikuko SAKURADA , Takuya TAKAHASHI
CPC classification number: G03G9/0827 , G03G9/0819 , G03G9/08711 , G03G9/08755 , G03G9/08795 , G03G9/08797 , G03G9/0918 , G03G9/09716 , G03G9/09725 , G03G9/09791
Abstract: The toner of the present invention contains: a toner base particle, and a silica particle and a fatty acid metal salt particle adhering to a surface of the toner base particle. The toner base particle contains a crystalline polyester resin and an amorphous polyester resin. The toner particle has an average circularity of 0.945 to 0.965. The silica particle has a volume average particle size of 70 to 300 nm, and has an average circularity of 0.5 to 0.9. The fatty acid metal salt particle has a median diameter based on a volume of 0.50 to 2.00 μm.
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公开(公告)号：US20160282742A1
公开(公告)日：2016-09-29
申请号：US15064040
申请日：2016-03-08
Applicant: Konica Minolta, Inc.
Inventor： Satoshi UCHINO , Shinya OBARA , Kosuke NAKAMURA
CPC classification number: G03G9/1133 , G03G9/0819 , G03G9/0821 , G03G9/0823 , G03G9/0827
Abstract: Provided is a two-component developer for developing an electrostatic latent image capable of stably printing a high-quality image.Disclosed is a two-component developer for developing an electrostatic latent image which contains toner particles and carrier particles having a core particle surface coated with a coating resin, in which a volume average particle size of the toner particles, an average magnetization of the core particle per one particle in an applied magnetic field of 1 kilooersted, a volume average particle size of the carrier particles, a volume resistivity, and an area ratio of the core particles exposed on the carrier particle surface are in a specific range.
Abstract translation: 公开了一种用于显影静电潜像的双组分显影剂，其包含调色剂颗粒和具有被涂覆树脂涂覆的核心颗粒表面的载体颗粒，其中调色剂颗粒的体积平均粒径，芯颗粒的平均磁化强度 在1千欧的施加磁场中的每一个颗粒，载体颗粒的体积平均粒径，体积电阻率和暴露在载体颗粒表面上的核心颗粒的面积比在特定范围内。
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Patent Agency Ranking
公开(公告)号：US20160266508A1
公开(公告)日：2016-09-15
申请号：US15060039
申请日：2016-03-03
Applicant: Konica Minolta, Inc.
Inventor： Shinya OBARA , Satoshi UCHINO , Kosuke NAKAMURA
IPC: G03G9/08
CPC classification number: G03G9/0819 , G03G9/0827
Abstract: A two-component developer of the present invention contains toner particles and carrier particles. The number-average particle diameter of the toner particles ranges from 3.5 to 5.0 μm. The volume-average particle diameter of the carrier particles MDc is within a specific range in accordance with the percentage of relatively large toner particles having relatively low circularity.
Abstract translation: 本发明的双组分显影剂含有调色剂颗粒和载体颗粒。 调色剂颗粒的数均粒径为3.5-5.0μm。 载体颗粒MDc的体积平均粒径根据具有较低圆形度的较大调色剂颗粒的百分比在特定范围内。
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公开(公告)号：US20220390873A1
公开(公告)日：2022-12-08
申请号：US17825127
申请日：2022-05-26
Applicant: Konica Minolta, Inc.
Inventor： Shinya OBARA , Koji SHIBATA , Ikuko SAKURADA
Abstract: Provided is a two-component developer for electrostatic charge image development including: toner particles containing toner base particles and an external additive disposed on a surface of the toner base particles; and carrier particles having a core material particle and a shell portion disposed on a surface of the core material particle, wherein the external additive contains inorganic particles surface-modified with a surface modifier represented by the following Formula (1); and a value of an iron element content (atomic %) measured by X-ray photoelectron spectroscopy (XPS) on a surface of the carrier particles satisfies the following Expression (1), (R1)4-n—Si—(X)n Formula (1): 4.0≤{AFe/(Ac+Ao+AFe)}×100≤15.0 Expression (1):
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公开(公告)号：US20200174388A1
公开(公告)日：2020-06-04
申请号：US16658912
申请日：2019-10-21
Applicant: Konica Minolta, Inc.
Inventor： Koji SHIBATA , Shinya OBARA , Junya UEDA , Takuya TAKAHASHI
Abstract: It is a two-component developer for electrostatic charge image development, which contains toner containing at least a binder resin and an external additive on a surface and a carrier containing a resin layer at least on a surface of a core material. The binder resin contains a crystalline polyester resin, the external additive contains alumina particles, and the resin layer contains a silicone resin.
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公开(公告)号：US20160209770A1
公开(公告)日：2016-07-21
申请号：US14991299
申请日：2016-01-08
Applicant: Konica Minolta, Inc.
Inventor： Kosuke NAKAMURA , Satoshi UCHINO , Shinya OBARA
CPC classification number: G03G9/1133 , G03G9/0819 , G03G9/0823 , G03G9/0825 , G03G9/0827 , G03G9/08755 , G03G9/09385 , G03G9/10 , G03G9/107 , G03G9/113 , G03G9/1132
Abstract: A two-component developer for electrostatic latent image development includes: toner particles obtained in such a manner that an external additive is attached to a surface of toner base particles containing at least a binder resin; and carrier particles obtained in such a manner that a surface of core particles is coated with a resin for coating, wherein the toner particles have a volume-average particle size of 3 μm or more and 5 μm or less, the core particles have porosity of 8% or less, and the carrier particles have a volume-average particle size of 15 μm or more and 30 μm or less, volume resistivity of 1×108 Ω·cm or more and 1×1010 Ω·cm or less, a true specific gravity of 4.25 g/cm3 or more and 5 g/cm3 or less, and a shape factor SF-1 of 105 or more and 125 or less.
Abstract translation: 用于静电潜像显影的双组分显影剂包括：以使外部添加剂附着到至少含有粘合剂树脂的调色剂基础颗粒的表面的方式获得的调色剂颗粒; 和以这样一种方式获得的载体颗粒，使得芯颗粒的表面涂覆有用于涂覆的树脂，其中调色剂颗粒的体积平均粒径为3μm以上且5μm以下，芯颗粒的孔隙率为 8％以下，载体颗粒的体积平均粒径为15μm以上30μm以下，体积电阻率为1×10 8Ω·cm·cm以上，1×10 10Ω·cm·cm以下， 真比重为4.25g / cm 3以上且5g / cm 3以下，形状因子SF-1为105以上且125以下。
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公开(公告)号：US20160202625A1
公开(公告)日：2016-07-14
申请号：US14990409
申请日：2016-01-07
Applicant: Konica Minolta, Inc.
Inventor： Shinya OBARA , Satoshi UCHINO , Kosuke NAKAMURA
CPC classification number: G03G9/1132 , G03G9/0819 , G03G9/0827
Abstract: Disclosed is a two-component developer containing toner particles and carrier particles. The number-average particle diameter of the toner particles MDt ranges from 3.5 to 5.0 μm. The MDt of the toner particles and the volume-average particle diameter of the carrier particles MDc are at a specific ratio, and spherical fine toner particles in the toner particles and fine carrier particles in the carrier particles exist at specific percentages.
Abstract translation: 公开了含有调色剂颗粒和载体颗粒的双组分显影剂。 调色剂颗粒MDt的数均粒径为3.5-5.0μm。 调色剂颗粒的MDt和载体颗粒MDc的体积平均粒径为特定比例，并且调色剂颗粒中的球形微调色剂颗粒和载体颗粒中的细载体颗粒以特定百分比存在。
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