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1.发明申请公开(公告)号：US20190227449A1
公开(公告)日：2019-07-25
申请号：US16238566
申请日：2019-01-03
Applicant: Taichi Nemoto , Toma Takebayashi
Inventor： Taichi Nemoto , Toma Takebayashi
CPC classification number: G03G9/0821 , G03G9/0825 , G03G9/08755 , G03G9/08795 , G03G9/08797 , G03G15/0865
Abstract: A toner comprising a binder resin is provided. When the toner is observed with an atomic force microscope in tapping mode to obtain a phase image and the phase image is binarized with an intermediate value between maximum and minimum phase difference values in the phase image to obtain a binarized image, the binarized image consists of first phase-contrast portions having a large phase difference and second phase-contrast portions having a small phase difference, where the first phase-contrast portions are dispersed in the second phase-contrast portions and a dispersion diameter of the first phase-contrast portions is in a range of from 150 to 500 nm. The toner has at least two glass transition temperatures (Tg) in respective ranges of from 40° C. to 65° C. and from −30° C. to 20° C., determined from a DSC curve obtained at a first temperature rise in a differential scanning calorimetric measurement by a midpoint method.
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2.发明申请公开(公告)号：US20180364600A1
公开(公告)日：2018-12-20
申请号：US16009462
申请日：2018-06-15
Applicant: Kazuoki FUWA , Hiroshi Yamashita , Yuka Mizoguchi , Shizuka Hashida , Toma Takebayashi , Junko Yamaguchi , Maia Kamei , Keisuke Ohta
Inventor： Kazuoki FUWA , Hiroshi Yamashita , Yuka Mizoguchi , Shizuka Hashida , Toma Takebayashi , Junko Yamaguchi , Maia Kamei , Keisuke Ohta
CPC classification number: G03G9/0902 , G03G9/0906 , G03G9/0912 , G03G9/0924 , G03G9/0926 , G03G15/08 , G03G2215/0604
Abstract: A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.
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公开(公告)号：US20220137525A1
公开(公告)日：2022-05-05
申请号：US17517359
申请日：2021-11-02
Applicant: Ryuuta Yoshida , Toma Takebayashi , Akio Takei , Yasuo Kamada
Inventor： Ryuuta Yoshida , Toma Takebayashi , Akio Takei , Yasuo Kamada
Abstract: The present disclosure provides a toner having excellent low-temperature fixing, heat-resistant-storage property, cleaning performance, and filming resistance. A toner containing toner base particles having a crystalline polyester resin and an amorphous polyester resin includes a plurality of organic particles disposed at least partially embedded in a surface of the toner base particles. A percentage of the crystalline polyester resin occupying the surface of the toner base particles is 4% to 20%, a volume average particle size of the organic particles is 10 nm to 40 nm, and a standard deviation of a distance between adjacent particles of the organic particles that are not in contact is 500 nm or less.
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公开(公告)号：US10429756B2
公开(公告)日：2019-10-01
申请号：US16009462
申请日：2018-06-15
Applicant: Kazuoki Fuwa , Hiroshi Yamashita , Yuka Mizoguchi , Shizuka Hashida , Toma Takebayashi , Junko Yamaguchi , Maia Kamei , Keisuke Ohta
Inventor： Kazuoki Fuwa , Hiroshi Yamashita , Yuka Mizoguchi , Shizuka Hashida , Toma Takebayashi , Junko Yamaguchi , Maia Kamei , Keisuke Ohta
Abstract: A toner is provided. The toner comprises a glittering pigment and a coloring pigment. The glittering pigment is disposed inside the toner. The coloring pigment comprises a yellow pigment comprising an isoindoline pigment.
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公开(公告)号：US12204277B2
公开(公告)日：2025-01-21
申请号：US17678125
申请日：2022-02-23
Applicant: Yasuo Kamada , Hiroshi Yamada , Toma Takebayashi , Akio Takei
Inventor： Yasuo Kamada , Hiroshi Yamada , Toma Takebayashi , Akio Takei
Abstract: Provided is a toner including toner base particles and resin particles. Each toner base particle includes a binder resin, a colorant, and wax. Each resin particle e has a core-shell structure including a core and a shell, where a glass transition temperature TgA of the shell is higher than a glass transition temperature TgB of the core. A surface of each toner base particle is covered with the resin particles. A storage elastic modulus G′1 of the toner at 70° C. during heating is 1.0×105 Pa or greater but 1.0×103 Pa or less, and a storage elastic modulus G′2 of the toner at 100° C. during heating is 1.0×104 Pa or greater but 5.0×104 Pa or less, as the toner is measured by a rheometer.
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Patent Agency Ranking
公开(公告)号：US20220291602A1
公开(公告)日：2022-09-15
申请号：US17678125
申请日：2022-02-23
Applicant: Yasuo KAMADA , Hiroshi Yamada , Toma Takebayashi , Akio Takei
Inventor： Yasuo KAMADA , Hiroshi Yamada , Toma Takebayashi , Akio Takei
Abstract: Provided is a toner including toner base particles and resin particles. Each toner base particle includes a binder resin, a colorant, and wax. Each resin particle e has a core-shell structure including a core and a shell, where a glass transition temperature TgA of the shell is higher than a glass transition temperature TgB of the core. A surface of each toner base particle is covered with the resin particles. A storage elastic modulus G′1 of the toner at 70° C. during heating is 1.0×105 Pa or greater but 1.0×103 Pa or less, and a storage elastic modulus G′2 of the toner at 100° C. during heating is 1.0×104 Pa or greater but 5.0×104 Pa or less, as the toner is measured by a rheometer.
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公开(公告)号：US10884350B2
公开(公告)日：2021-01-05
申请号：US16452789
申请日：2019-06-26
Applicant: Toma Takebayashi , Taichi Nemoto
Inventor： Toma Takebayashi , Taichi Nemoto
Abstract: A toner is provided. The toner comprises a binder resin, a colorant, and a release agent. The binder resin comprises a polyester resin comprising a crystalline polyester resin. The crystalline polyester resin forms domains having a number average long diameter of from 0 to 50 nm in a cross-section of the toner. The toner satisfies the following relation: G′(50)/G′(90)≥6.0×102 where G′(50) and G′(90) represent storage elastic modulus of the toner at 50 degrees C. and 90 degrees C., respectively.
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公开(公告)号：US20200012206A1
公开(公告)日：2020-01-09
申请号：US16452789
申请日：2019-06-26
Applicant: Toma TAKEBAYASHI , Taichi Nemoto
Inventor： Toma TAKEBAYASHI , Taichi Nemoto
Abstract: A toner is provided. The toner comprises a binder resin, a colorant, and a release agent. The binder resin comprises a polyester resin comprising a crystalline polyester resin. The crystalline polyester resin forms domains having a number average long diameter of from 0 to 50 nm in a cross-section of the toner. The toner satisfies the following relation: G′(50)/G′(90)≥6.0×102 where G′(50) and G′(90) represent storage elastic modulus of the toner at 50 degrees C. and 90 degrees C., respectively.
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公开(公告)号：US20230147363A1
公开(公告)日：2023-05-11
申请号：US17982521
申请日：2022-11-08
Applicant: Ryuuta YOSHIDA , Akio TAKEI , Ryohei YAMAGUCHI , Toma TAKEBAYASHI
Inventor： Ryuuta YOSHIDA , Akio TAKEI , Ryohei YAMAGUCHI , Toma TAKEBAYASHI
CPC classification number: G03G9/0825 , G03G9/08755 , G03G9/0806 , G03G9/0821 , G03G9/0827
Abstract: A toner includes: toner base particles each containing a binder resin; and resin particles on a surface of each of the toner base particles. A glass transition temperature (Tg) of the toner at the first heating in differential scanning calorimetry (DSC) is 20° C. or higher and 50° C. or lower. A glass transition temperature of a tetrahydrofuran (THF)-insoluble component of the toner at the first heating in DSC is −40° C. or higher and 10° C. or lower. An average circularity of the toner is 0.970 or more and 0.985 or less. A standard deviation of the average circularity is 0.020 or less.
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公开(公告)号：US20230014605A1
公开(公告)日：2023-01-19
申请号：US17811054
申请日：2022-07-06
Applicant: Akinori SAITOH , Akio Takei , Toma Takebayashi , Masahiro Yukikawa , Tomomi Harashima , Hiroshi Yamada
Inventor： Akinori SAITOH , Akio Takei , Toma Takebayashi , Masahiro Yukikawa , Tomomi Harashima , Hiroshi Yamada
Abstract: A toner includes toner base particles and external additives deposited on a surface of the toner base particle. The toner base particle includes an amorphous polyester resin, a crystalline polyester resin, a release agent, and resin particles. An abundance ratio of the crystalline polyester resin in the surface of the toner base particle as observed by TEM is 2.5% or greater but 25% or less. The resin particles are deposited at the surface of the toner base particle as observed by SEM. A ratio of aggregates of the resin particles occupying the surface of the toner base particle is 1% or greater but 70% or less, where R is a major axis of the minimum particle of the resin particles, and the resin particle having a major axis of 3R or greater is determined as the aggregate.
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