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：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：US20220100114A1

公开(公告)日：2022-03-31

申请号：US17485038

申请日：2021-09-24

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masashi YAMASHITA

IPC: G03G9/113 ,  G03G9/08

Abstract: A carrier includes carrier particles. Each of the carrier particles includes a carrier core and a coating layer covering the surface of the carrier core. The coating layer contains a silicone resin and conductive particles. Each of the conductive particles includes a transparent conductive substrate composed of a transparent conductive material and a film covering a surface of the transparent conductive substrate. The film contains silica.

公开(公告)号：US20180217514A1

公开(公告)日：2018-08-02

申请号：US15874943

申请日：2018-01-19

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masashi YAMASHITA

IPC: G03G9/08 ,  G03G15/08

CPC classification number: G03G9/08 ,  G03G9/0819 ,  G03G9/09716 ,  G03G9/09725 ,  G03G9/09775 ,  G03G15/08 ,  G03G15/0808

Abstract: A toner has positive chargeability. Particles of the toner each include a toner mother particle and external additive particles adhering to a surface of the toner mother particle. The external additive particles include first external additive particles and second external additive particles. The first external additive particles have positive chargeability and are each a first silica particle having a surface treated with a positive chargeability imparting agent and a hydrophobing agent. The second external additive particles have negative chargeability and are each a second silica particle having a surface treated only with a silane compound. The silane compound is at least one alkylalkoxysilane represented by formula (I) shown below. In formula (I), R1 represents an alkyl group having a carbon number of at least 8 and no greater than 16. R2, R3, and R4 each represent, independently of one another, an optionally substituted hydrocarbon group.

公开(公告)号：US20150086918A1

公开(公告)日：2015-03-26

申请号：US14496323

申请日：2014-09-25

Applicant: KYOCERA Document Solutions Inc.

Inventor： Toshiki TAKEMORI ,  Masashi YAMASHITA ,  Hiroki UEMURA ,  Yukinori NAKAYAMA ,  Masaki OKITA

IPC: G03G9/08 ,  G03G9/087

CPC classification number: G03G9/0821 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09328 ,  G03G9/09371 ,  G03G9/09392

Abstract: An electrostatic latent image developing toner includes toner particles. Each of the toner particles includes a toner core containing a binder resin and a releasing agent, and a shell layer coating the toner core. The releasing agent has a melting point Mpr of no less than 50° C. and no greater than 100° C. The releasing agent has a number average dispersion diameter of no less than 30 nm and no greater than 500 nm. The shell layer is made from a resin including a unit derived from a monomer of a thermosetting resin. The thermosetting resin is one or more amino resins from among a melamine resin, a urea resin, and a glyoxal resin.

Abstract translation: 静电潜像显影调色剂包括调色剂颗粒。 每个调色剂颗粒包括含有粘合剂树脂和脱模剂的调色剂芯和涂覆调色剂芯的外壳层。 脱模剂的熔点Mpr为50℃以上且不大于100℃。脱模剂的数均分散直径为30nm以上且500nm以下。 壳层由包含来自热固性树脂的单体的单元的树脂制成。 热固性树脂是三聚氰胺树脂，脲醛树脂和乙二醛树脂中的一种或多种氨基树脂。