公开(公告)号：US20150212445A1

公开(公告)日：2015-07-30

申请号：US14606325

申请日：2015-01-27

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kohei TERASAKI

IPC: G03G9/093

CPC classification number: G03G9/09328 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/09392

Abstract: A capsule toner for developing an electrostatic charge image includes a plurality of toner particles. Each of the toner particles includes a core and a shell layer disposed over a surface of the core. The cores have a zeta potential at pH 4 of less than 0 V, and the toner particles have a zeta potential at pH 4 of greater than 0 V. The shell layers have a hardness of at least 1 N/m2 and less than 3 N/m2. The shell layers have a thickness of no greater than 20 nm. The toner particles have a roundness of at least 0.965 and less than 0.975.

Abstract translation: 用于显影静电荷图像的胶囊调色剂包括多个调色剂颗粒。 每个调色剂颗粒包括芯和设置在芯的表面上的壳层。 核心在pH4下的ζ电位小于0V，调色剂颗粒在pH4下的ζ电位大于0V。壳层的硬度至少为1N / m 2且小于3N / m2。 壳层的厚度不大于20nm。 调色剂颗粒的圆度至少为0.965且小于0.975。

公开(公告)号：US20240184227A1

公开(公告)日：2024-06-06

申请号：US18576301

申请日：2022-03-31

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kohei TERASAKI ,  Tamotsu SHIMIZU ,  Yusuke KURANO ,  Masashi YAMASHITA ,  Yuma UCHIHASHI

IPC: G03G9/113 ,  G03G9/08 ,  G03G9/097

CPC classification number: G03G9/1139 ,  G03G9/0819 ,  G03G9/09708 ,  G03G9/1135

Abstract: In a two-component developer, toner particles include toner mother particles and external additive particles including strontium titanate particles. A first percentage content being a percentage content of the strontium titanate particles to the mass of the toner mother particles is 0.30-0.90% by mass. The carrier particles include carrier cores and coat layers. The coat layers contain barium titanate particles and a coating resin including a silicone resin. The barium titanate particles have a number average primary particle diameter of 100-500 nm. A second percentage content being a percentage content of the coat layers to the mass of the carrier cores is 2.0-4.0% by mass. A third percentage content being a percentage content of the barium titanate to the mass of the coating resin satisfies formula (1) “(X×10)≤Z≤45.0”. In formula (1), X represents the first percentage content and Z represents the third percentage content.

公开(公告)号：US20200159140A1

公开(公告)日：2020-05-21

申请号：US16674185

申请日：2019-11-05

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kohei TERASAKI

IPC: G03G9/113

Abstract: A carrier includes carrier particles. The carrier particles include first carrier particles and second carrier particles. The first carrier particles each include a first carrier core and a first coat layer covering a surface of the first carrier core. The second carrier particles each include a second carrier core and a second coat layer covering a surface of the second carrier core. The first coat layers contain no fatty acid metal salt. The second coat layer contains a coat layer binder resin and a fatty acid metal salt. The second coat layers contain the fatty acid metal salt in a proportion of from 85 mass % to 95 mass % relative to a total mass of the second coat layers. The second carrier particles are contained in a proportion of from 7 mass % to 15 mass % relative to a total mass of the first carrier particles and the second carrier particles.

公开(公告)号：US20240329555A1

公开(公告)日：2024-10-03

申请号：US18576627

申请日：2022-03-31

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu SHIMIZU ,  Kohei TERASAKI ,  Yuma UCHIHASHI ,  Yusuke KURANO

IPC: G03G9/113 ,  G03G9/107

CPC classification number: G03G9/1139 ,  G03G9/1075 ,  G03G9/1131 ,  G03G9/1136

Abstract: In a two-component developer, external additive particles of toner particles include silica particles. The silica particles have a number average primary particle diameter of at least 30 nm and no greater than 120 nm. Coat layers of carrier particles contain a coating resin and barium titanate particles. The coating resin includes a silicone resin. The barium titanate particles have a number average primary particle diameter of at least 100 and no greater than 500 nm. The barium titanate particles have a content of at least 5 parts by mass and no greater than 45 parts by mass relative to 100 parts by mass of the coating resin. A rate of a mass of the coat layers to a mass of the carrier cores is at least 0.09% by mass and no greater than 4.90% by mass. A coverage rate of the carrier cores is at least 80.0% and less than 100.0%.

公开(公告)号：US20240069458A1

公开(公告)日：2024-02-29

申请号：US18458606

申请日：2023-08-30

Applicant: KYOCERA Document Solutions Inc.

Inventor： Asami SASAKI ,  Norio KUBO ,  Masashi FUJISHIMA ,  Kohei TERASAKI

IPC: G03G9/113 ,  G03G9/08 ,  G03G9/097 ,  G03G15/08

CPC classification number: G03G9/1139 ,  G03G9/0819 ,  G03G9/09725 ,  G03G9/1136 ,  G03G15/0894

Abstract: A developer set includes a first developer and a second developer. The first developer contains a first toner containing first toner particles and a first carrier containing first carrier particles. The second developer contains a second toner containing second toner particles and a second carrier containing second carrier particles. The first toner particles and the second toner particles each include a toner mother particle and external additive particles attached to the surface of the toner mother particle. The external additive particles include spacer particles. The spacer particles have a number average primary particle diameter of at least 32 nm and no greater than 145 nm. The first carrier particles each include a first carrier mother particle and strontium titanate particles attached to the surface of the first carrier mother particle.

公开(公告)号：US20240241461A1

公开(公告)日：2024-07-18

申请号：US18575982

申请日：2022-03-31

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu SHIMIZU ,  Kohei TERASAKI ,  Yuma UCHIHASHI ,  Eriko TAKEUCHI

IPC: G03G9/113 ,  G03G9/08 ,  G03G9/097

CPC classification number: G03G9/1136 ,  G03G9/0819 ,  G03G9/09733 ,  G03G9/1139

Abstract: In a two-component developer, external additive particles of toner particles include resin particles containing a thermoplastic resin. Coat layers of carrier particles contain a coating resin and barium titanate particles. The coating resin includes a silicone resin. The barium titanate particles have a number average primary particle diameter of 100-500 nm. The barium titanate particles have a content of 4-45 parts by mass relative to 100 parts by mass of the coating resin. The rate of the mass of the coat layers to the mass of the carrier cores is 0.10-4.90% by mass. The average of coverage rates of the carrier cores is at least 80.0% and less than 100.0%.

公开(公告)号：US20240319629A1

公开(公告)日：2024-09-26

申请号：US18575573

申请日：2022-03-31

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu SHIMIZU ,  Kohei TERASAKI ,  Yusuke KURANO ,  Masashi YAMASHITA ,  Eriko TAKEUCHI

IPC: G03G9/097 ,  G03G9/08 ,  G03G9/113

CPC classification number: G03G9/09733 ,  G03G9/0819 ,  G03G9/1136 ,  G03G9/1139

Abstract: In a two-component developer, external additive particles of toner particles include resin particles. The resin particles contain a crosslinked resin including a repeating unit derived from a crosslinking agent. Carrier particles each include a carrier core and a coat layer covering a surface of the carrier core. The coat layers contain a coating resin and barium titanate particles. The coating resin includes a silicone resin. The barium titanate particles have a number average primary particle diameter within a range of 100 nm to 500 nm. The barium titanate particles have a content within a range of 5 parts by mass to 45 parts by mass relative to 100 parts by mass of the coating resin. A rate of a mass of the coat layers to a mass of the carrier cores is greater than 0.0% by mass and no greater than 4.9% by mass. The carrier cores have a shape factor within a range of 34.0% to 85.0%.

公开(公告)号：US20240077810A1

公开(公告)日：2024-03-07

申请号：US18458713

申请日：2023-08-30

Applicant: KYOCERA Document Solutions Inc.

Inventor： Tamotsu SHIMIZU ,  Kohei TERASAKI ,  Akira MATAYOSHI ,  Yuji TOYOTA

IPC: G03G9/087 ,  G03G9/10 ,  G03G15/08

CPC classification number: G03G9/08773 ,  G03G9/10 ,  G03G15/0865

Abstract: A developer includes a toner containing toner particles and a carrier containing carrier particles. The toner particles each include a toner mother particle and external additive particles attached to a surface of the toner mother particle. The external additive particles include first silica particles and spacer particles. The first silica particles have a number average primary particle diameter of at least 10 nm and no greater than 30 nm. The spacer particles have a number average primary particle diameter of at least 32 nm and no greater than 145 nm. The spacer particles in the toner particles have a coverage ratio of at least 2.0% by area and no greater than 40.0% by area. The carrier particles each include a carrier mother particle and strontium titanate particles attached to a surface of the carrier mother particle.

公开(公告)号：US20240069456A1

公开(公告)日：2024-02-29

申请号：US18458982

申请日：2023-08-30

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kohei TERASAKI ,  Norio KUBO ,  Yuji TOYOTA ,  Akira MATAYOSHI

IPC: G03G9/083 ,  G03G9/09 ,  G03G9/113 ,  G03G15/08

CPC classification number: G03G9/0833 ,  G03G9/0904 ,  G03G9/1139 ,  G03G15/0867

Abstract: Toner particles in a developer include first strontium titanate particles attached to the surface of each toner mother particle thereof. The first strontium titanate particles have a content ratio of 0.3 to 0.9 parts by mass to 100.0 parts by mass of the toner mother particles. In the developer, coat layers of carrier mother particles of first carrier particles contain barium titanate particles and a coating resin including silicone resin. The barium titanate particles have a content ratio of 2 to 47 parts by mass to 100 parts by mass of the coating resin. Second strontium titanate particles attached to the surfaces of the carrier mother particles have a diameter of 15 to 85 nm.

公开(公告)号：US20150140488A1

公开(公告)日：2015-05-21

申请号：US14537021

申请日：2014-11-10

Applicant: KYOCERA Document Solutions Inc.

Inventor： Kohei TERASAKI

IPC: G03G9/08 ,  G03G9/093

CPC classification number: G03G9/09328 ,  G03G9/09371 ,  G03G9/09392

Abstract: An electrostatic charge image developing toner contains a plurality of toner particles. Each of the toner particles includes a toner core containing a binder resin and a shell layer coating the toner core. The shell layers contain a thermosetting resin. The toner cores have a negative zeta potential in an aqueous medium adjusted to pH 4. The toner particles have a positive zeta potential in an aqueous medium adjusted to pH 4. The shell layers have a film thickness of 1 nm or more and 20 nm or less.

Abstract translation: 静电荷图像显影调色剂含有多个调色剂颗粒。 每个调色剂颗粒包括含有粘合剂树脂的调色剂芯和涂覆调色剂芯的外壳层。 壳层含有热固性树脂。 调色剂核心在调节至pH 4的水性介质中具有负ζ电位。调色剂颗粒在调节至pH 4的水性介质中具有正ζ电位。壳层的膜厚度为1nm以上至20nm，或 减。