公开(公告)号：US20230040461A1

公开(公告)日：2023-02-09

申请号：US17814644

申请日：2022-07-25

申请人： Daisuke Inoue ,  Mitsuaki Hirose ,  Yohichi Kitagawa ,  Tsukiko Takahashi ,  Kenji Komito ,  Akihiko Moki

发明人： Daisuke Inoue ,  Mitsuaki Hirose ,  Yohichi Kitagawa ,  Tsukiko Takahashi ,  Kenji Komito ,  Akihiko Moki

IPC分类号： G03G9/097 ,  G03G9/08 ,  G03G9/087 ,  G03G15/08

摘要： A toner includes: toner base particles including a binder resin, a colorant, an inorganic filler, and a release agent; and an external additive. An average circularity of the toner is 0.974 or more but 0.985 or less. A surface roughness parameter Sz of a surface of the toner is 200 nm or more but 500 nm or less, the surface roughness parameter Sz being measured with an atomic force microscope (AFM).

公开(公告)号：US20230185210A1

公开(公告)日：2023-06-15

申请号：US18079050

申请日：2022-12-12

申请人： Tsukiko TAKAHASHI ,  Kohsuke SATOH ,  Kazumi SUZUKI ,  Daichi HISAKUNI ,  Kazuoki FUWA

发明人： Tsukiko TAKAHASHI ,  Kohsuke SATOH ,  Kazumi SUZUKI ,  Daichi HISAKUNI ,  Kazuoki FUWA

IPC分类号： G03G9/093 ,  G03G9/08

CPC分类号： G03G9/09385 ,  G03G9/0821 ,  G03G9/09328

摘要： A glittering toner includes: a flat metallic pigment having a surface coated with a resin; a polyester-styrene acrylic composite resin; and a polyester resin. When a solubility parameter of the polyester-styrene acrylic composite resin is represented by SP1 (cal/cm3)1/2 and a solubility parameter of the polyester resin is represented by SP2 (cal/cm3)1/2, the SP1 and the SP2 satisfy a relational expression (1): [SP2−SP1>0.3] and the SP1 satisfies a relational expression (2): [10

公开(公告)号：US20230280670A1

公开(公告)日：2023-09-07

申请号：US18175757

申请日：2023-02-28

申请人： Tsukiko TAKAHASHI ,  Mitsuaki Hirose ,  Yohichi Kitagawa ,  Suzuka Karato ,  Hiroshi Yamada

发明人： Tsukiko TAKAHASHI ,  Mitsuaki Hirose ,  Yohichi Kitagawa ,  Suzuka Karato ,  Hiroshi Yamada

IPC分类号： G03G9/097 ,  G03G15/08 ,  G03G9/08 ,  C08G63/16 ,  G03G9/087

CPC分类号： G03G9/09716 ,  G03G15/0865 ,  G03G9/0825 ,  G03G9/09725 ,  C08G63/16 ,  G03G9/08755 ,  G03G9/09708

摘要： [Summary] An object of the present invention is to provide a toner that has both low-temperature fixability and heat-resistant storage stability, suppresses contamination of cleaning parts and photoconductors, and has excellent charging stability.
[Tasks] A toner includes toner based particles containing a binder resin, a colorant, and a wax; and fine resin particles and an inorganic external additive that are present on a surface of the toner based particles, wherein a coverage of the fine resin particles is in a range from 30% to 70%, and wherein the inorganic external additive covers a surface of oxide of a metal element with hydroxide of a metal element.

公开(公告)号：US20230161276A1

公开(公告)日：2023-05-25

申请号：US17991846

申请日：2022-11-22

申请人： Mitsuaki HIROSE ,  Daisuke INOUE ,  Yohichi KITAGAWA ,  Tsukiko TAKAHASHI ,  Kenji KOMITO ,  Akihiko MOKI

发明人： Mitsuaki HIROSE ,  Daisuke INOUE ,  Yohichi KITAGAWA ,  Tsukiko TAKAHASHI ,  Kenji KOMITO ,  Akihiko MOKI

IPC分类号： G03G9/08 ,  G03G9/087

CPC分类号： G03G9/0821 ,  G03G9/0804 ,  G03G9/0827 ,  G03G9/08728

摘要： Provided is a toner including toner particles. Each of the toner particles includes a toner base particle including a binder resin and a release agent. The toner particles have an average circularity of 0.974 or greater and 0.985 or less. An arithmetic mean height Sa of surfaces of the toner particles is 45 nm or greater. The toner particles have a BET specific surface area of 1.3 m2/g or greater and 2.5 m2/g or less.

公开(公告)号：US20240241458A1

公开(公告)日：2024-07-18

申请号：US18415077

申请日：2024-01-17

申请人： Tsukiko TAKAHASHI ,  Daisuke INOUE ,  Keiji MAKABE ,  Taishi YAMASHITA ,  Shuto SUNAGA

发明人： Tsukiko TAKAHASHI ,  Daisuke INOUE ,  Keiji MAKABE ,  Taishi YAMASHITA ,  Shuto SUNAGA

IPC分类号： G03G9/097 ,  G03G9/08 ,  G03G9/087

CPC分类号： G03G9/09708 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/09733 ,  G03G2215/0604

摘要： A toner contains a mother toner particle containing a resin, a colorant, and a wax and



an inorganic external additive on the surface of the mother toner particle, wherein the following relationships are satisfied:











20

公开(公告)号：US20220326632A1

公开(公告)日：2022-10-13

申请号：US17657471

申请日：2022-03-31

申请人： Keiji MAKABE ,  Akira Tanaka ,  Hidekazu Kakinuma ,  Tsukiko Takahashi

发明人： Keiji MAKABE ,  Akira Tanaka ,  Hidekazu Kakinuma ,  Tsukiko Takahashi

IPC分类号： G03G9/097 ,  G03G15/08 ,  G03G9/08

摘要： [Object] An object of the invention is to provide a toner that can both achieve a higher level of low temperature fixability and suppression of the toner scattering.
[Means of Achieving the Object]
The disclosure is to provide a toner, including base-particles, and an external-additive, wherein a glass-transition temperature obtained from a DSC-curve at a second-warming of a THF-insoluble component is −50° C. or higher and 10° C. or lower, wherein an average circularity of the toner is 0.975 or more and 0.985 or lower, wherein the toner satisfies the following formula: 1.5≤Bt−0.025−Ct≤3.0, wherein the Bt [m2/g] is a BET-specific-surface area of the toner-particles, and the Ct [%] is a coverage by the external-additive, and, at least a portion of a surface of the external-additive is coated with either an oxide of a metallic element, a hydroxide of the metallic element, or both.

公开(公告)号：US20210116830A1

公开(公告)日：2021-04-22

申请号：US17060289

申请日：2020-10-01

申请人： Akio TAKEI ,  Takahiro HONDA ,  Tsukiko TAKAHASHI ,  Tsuneyasu NAGATOMO

发明人： Akio TAKEI ,  Takahiro HONDA ,  Tsukiko TAKAHASHI ,  Tsuneyasu NAGATOMO

IPC分类号： G03G9/087 ,  G03G9/08 ,  G03G9/083

摘要： A toner is provided. The toner comprises colored particles and external additives present on surfaces of the colored particles. The colored particles each comprise a core and a shell layer. The core contains a crystalline resin, a non-crystalline resin, and a colorant. The shell layer contains a resin and has a thickness of from 30 to 130 nm. The external additives comprise a metal oxide and a silicon compound. An electronegativity X(A) of the metal oxide and an electronegativity X(Si) of the silicon compound satisfy a relation 0.5≤X(A)/X(Si)≤0.8. A proportion of an amount of the metal oxide directly adhered to the surfaces of the colored particles to a total amount of the metal oxide present on the colored particles is from 60% to 90% by mass.

公开(公告)号：US20240310746A1

公开(公告)日：2024-09-19

申请号：US18605957

申请日：2024-03-15

申请人： Daisuke INOUE ,  Keiji MAKABE ,  Tsukiko TAKAHASHI ,  Taishi YAMASHITA ,  Shuto SUNAGA

发明人： Daisuke INOUE ,  Keiji MAKABE ,  Tsukiko TAKAHASHI ,  Taishi YAMASHITA ,  Shuto SUNAGA

IPC分类号： G03G9/087 ,  G03G9/08 ,  G03G9/09 ,  G03G15/08

CPC分类号： G03G9/08755 ,  G03G9/0819 ,  G03G9/08782 ,  G03G9/09 ,  G03G15/08

摘要： Toner may comprise toner particles that comprise a binder resin; the toner particles have a volume average particle diameter from 4.0 μm to 6.0 μm, and the toner has a number content of coarse particle of 20 μm or more from 10 to 250 in 10 mg of the toner.

公开(公告)号：US20230195005A1

公开(公告)日：2023-06-22

申请号：US18084579

申请日：2022-12-20

申请人： Taishi YAMASHITA ,  Yohichi KITAGAWA ,  Tsukiko TAKAHASHI ,  Mitsuaki HIROSE ,  Daisuke INOUE

发明人： Taishi YAMASHITA ,  Yohichi KITAGAWA ,  Tsukiko TAKAHASHI ,  Mitsuaki HIROSE ,  Daisuke INOUE

IPC分类号： G03G9/097 ,  G03G9/087 ,  G03G9/08 ,  G03G15/08

CPC分类号： G03G9/09791 ,  G03G9/08711 ,  G03G9/0819 ,  G03G15/0865

摘要： Provided is a toner including toner particles. Each of the toner particles includes a toner base particle including a binder resin, resin particles covering the toner base particle, and zinc stearate particles serving as an external additive. In each of the toner particles, a coverage rate of the toner base particle with the resin particles is 30% or greater and 70% or less. The zinc stearate particles have a volume average particle diameter of 3 μm or greater and 20 μm or less.

公开(公告)号：US20230152724A1

公开(公告)日：2023-05-18

申请号：US17983408

申请日：2022-11-09

申请人： Suzuka KARATO ,  Mitsuaki HIROSE ,  Hiroshi YAMADA ,  Yohichi KITAGAWA ,  Tsukiko TAKAHASHI

发明人： Suzuka KARATO ,  Mitsuaki HIROSE ,  Hiroshi YAMADA ,  Yohichi KITAGAWA ,  Tsukiko TAKAHASHI

IPC分类号： G03G9/087 ,  G03G9/08

CPC分类号： G03G9/08711 ,  G03G9/0819 ,  G03G9/0825 ,  G03G2215/16

摘要： A toner includes toner base particles each including a binder resin and a releasing agent, resin particles, and an external additive. Resin particles, from among the resin particles in the toner, and the external additive are deposited on a surface of each of the toner base particles. A standard deviation of a distance between resin particles next to one another on the surface is less than 600 nm, the resin particles next to one another being from among the resin particles deposited on the surface. The external additive includes primary particles each standing alone and non-spherical cohesive particles each including cohered primary particles. A proportion of the primary particles each standing alone per 1,000 particles of the external additive is 30% or less, the particles of the external additive in the per 1,000 particles being the primary particles each standing alone and the cohesive particles.