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公开(公告)号：US12078961B2
公开(公告)日：2024-09-03
申请号：US17407266
申请日：2021-08-20
Applicant: Yuka Mizoguchi , Hiroshi Yamashita , Junichi Watanabe , Tomomi Harashima
Inventor： Yuka Mizoguchi , Hiroshi Yamashita , Junichi Watanabe , Tomomi Harashima
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0821 , G03G9/08711 , G03G15/0813
Abstract: A toner includes a crystalline polyester resin and an amorphous polyester resin. A ratio of the storage modulus of the toner G′ (To) at a temperature To to the storage modulus of the toner G′ (To+3) at a temperature To+3 is greater than or equal to 10, in a case where the temperature To is within a range from 50° C. to 65° C.
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2.发明公开公开(公告)号：US20230288829A1
公开(公告)日：2023-09-14
申请号：US18115779
申请日：2023-03-01
Applicant: Kazuoki FUWA , Yuka MIZOGUCHI , Junichi WATANABE , Toshihiko SUGIYAMA , Natsuko MATSUSHITA
Inventor： Kazuoki FUWA , Yuka MIZOGUCHI , Junichi WATANABE , Toshihiko SUGIYAMA , Natsuko MATSUSHITA
CPC classification number: G03G9/0906 , G03G9/08755 , G03G9/08782 , G03G15/0865
Abstract: [Summary] To provide resin particles with high weather resistance even when a plant-derived resin and PET are used as binder resins.
[Tasks] The Resin particles includes a binder resin and a colorant, wherein the binder resin contains polyethylene terephthalate and a plant-derived resin, wherein the colorant contains an isoindoline pigment, and wherein a radioisotope 14C concentration in the resin particles is 5.4 pMC or higher.-
3.发明公开公开(公告)号：US20230273537A1
公开(公告)日：2023-08-31
申请号：US18109285
申请日：2023-02-14
Applicant: Yuka MIZOGUCHI , Junichi WATANABE , Kazuoki FUWA , Toshihiko SUGIYAMA , Natsuko MATSUSHITA
Inventor： Yuka MIZOGUCHI , Junichi WATANABE , Kazuoki FUWA , Toshihiko SUGIYAMA , Natsuko MATSUSHITA
CPC classification number: G03G9/08755 , G03G15/0865
Abstract: [Summary] The invention is to provide resin particles capable of forming images with reduced environmental load, excellent low-temperature fixability, and chargeability characteristics, and excellent image quality can be obtained even when plant-derived resins are used.
[Tasks] Resin particles includes polyethylene terephthalate or polybutylene terephthalate, wherein a concentration of radioactive carbon isotope 14C in the resin particles is 10.8 pMC or more, and wherein the resin particles contain 0.05% by mass or more and 1% by mass or less of a divalent metal element excluding an external additive.-
公开(公告)号：US20230266688A1
公开(公告)日：2023-08-24
申请号：US18168726
申请日：2023-02-14
Applicant: Junichi WATANABE , Kazuoki Fuwa , Yuka Mizoguchi , Toshihiko Sugiyama , Natsuko Matsushita
Inventor： Junichi WATANABE , Kazuoki Fuwa , Yuka Mizoguchi , Toshihiko Sugiyama , Natsuko Matsushita
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0825 , G03G15/0105
Abstract: Resin particles each include a binder resin. The binder resin includes an amorphous polyester resin and a crystalline resin. The amorphous polyester resin includes alcohol monomers as one of constituent components. The alcohol monomers include propylene glycol. Abundance of the crystalline resin in a region from an outermost surface of each of the resin particles to a depth of 150 nm from the outermost surface is 4% or less relative to an amount of the crystalline resin in an entire region of each of the resin particles. A radiocarbon 14C content of the resin particles is 5.4 pMC or greater.
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公开(公告)号：US10895816B2
公开(公告)日：2021-01-19
申请号：US16569279
申请日：2019-09-12
Applicant: Minoru Masuda , Hiroshi Yamashita , Ryota Inoue , Yuka Mizoguchi , Daichi Hisakuni , Tomomi Harashima
Inventor： Minoru Masuda , Hiroshi Yamashita , Ryota Inoue , Yuka Mizoguchi , Daichi Hisakuni , Tomomi Harashima
Abstract: An image forming apparatus is provided that includes: first and second electrostatic latent image bearers; first and second electrostatic latent image forming devices; first and second developing devices configured to develop first and second electrostatic latent images with a colored toner and a special-color toner to form a colored toner image and a special-color toner image, respectively; a primary transfer device configured to transfer the colored toner image and the special-color toner image onto an intermediate image bearer in an overlapping manner to form a composite toner image; a secondary transfer device configured to transfer the composite toner image onto a recording medium; and a fixing device configured to fix the composite toner image thereon. The special-color toner comprises plate-like and/or film-like pigments. An absolute difference in volume resistivity between the special-color toner and the colored toner is 0.30 log Ω cm or less.
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Patent Agency Ranking
公开(公告)号：US10545421B2
公开(公告)日：2020-01-28
申请号：US15904551
申请日：2018-02-26
Applicant: Yuka Mizoguchi , Hiroshi Yamashita , Ryota Inoue , Taichi Nemoto , Shizuka Hashida
Inventor： Yuka Mizoguchi , Hiroshi Yamashita , Ryota Inoue , Taichi Nemoto , Shizuka Hashida
Abstract: Provided is a toner including at least: a non-crystalline polyester resin; and a crystalline polyester resin, wherein when a cross-section of the toner is observed, the crystalline polyester resin has a maximum length of 100 nm or greater but less than 500 nm, and a ratio Dv/Dn of a volume average diameter Dv of the crystalline polyester resin to a number average diameter Dn of the crystalline polyester resin is less than 1.20.
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公开(公告)号：US20180267420A1
公开(公告)日：2018-09-20
申请号：US15919256
申请日：2018-03-13
Applicant: Hiroshi YAMASHITA , Suzuka KARATO , Yuka MIZOGUCHI , Shizuka HASHIDA
Inventor： Hiroshi YAMASHITA , Suzuka KARATO , Yuka MIZOGUCHI , Shizuka HASHIDA
Abstract: A toner is provided. The toner includes toner particles each comprising a binder resin and plate-like pigment particles. In a cross-section of the toner, the plate-like pigment particles have an average thickness D of 1.0 μm or less and a maximum length L of 5.0 μm or more. In a fixed toner image formed with the toner, the plate-like pigment particles have a maximum width W of 3.0 μm or more. The toner has a circularity of from 0.950 to 0.985.
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公开(公告)号：US09921503B2
公开(公告)日：2018-03-20
申请号：US15122087
申请日：2015-01-06
Applicant: Hiroshi Yamada , Tsuyoshi Sugimoto , Susumu Chiba , Shinsuke Nagai , Kohsuke Nagata , Shinya Nakayama , Yuka Mizoguchi , Suzuka Amemori
Inventor： Hiroshi Yamada , Tsuyoshi Sugimoto , Susumu Chiba , Shinsuke Nagai , Kohsuke Nagata , Shinya Nakayama , Yuka Mizoguchi , Suzuka Amemori
CPC classification number: G03G9/08755 , G03G9/0806 , G03G9/08793 , G03G9/08795 , G03G9/08797 , G03G9/0904 , G03G15/08
Abstract: A toner including: a pigment; polyester resin A that is insoluble in tetrahydrofuran (THF); and polyester resin B that is soluble in THF, wherein the toner satisfies requirements (1) to (3) below: (1) the polyester resin A includes one or more aliphatic diols including from 3 through 10 carbon atoms, as a component constituting the polyester resin A; (2) the polyester resin B includes at least an alkylene glycol in an amount of 40 mol % or more, as a component constituting the polyester resin B; and (3) a glass transition temperature (Tg1st) of the toner at first heating in differential scanning calorimetry (DSC) of the toner is from 20° C. through 50° C.
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公开(公告)号：US09618864B2
公开(公告)日：2017-04-11
申请号：US14330109
申请日：2014-07-14
Applicant: Hideki Sugiura , Yuka Mizoguchi , Mio Kumai
Inventor： Hideki Sugiura , Yuka Mizoguchi , Mio Kumai
CPC classification number: G03G9/08755 , G03G9/0806 , G03G9/0819 , G03G9/0825 , G03G9/0827 , G03G9/08795 , G03G9/08797 , G03G9/093 , G03G9/09392
Abstract: A toner comprised of mother toner particles each including a colorant, a resin A capable of forming a crystalline structure, and a resin B incapable of forming a crystalline structure is provided. The resin A is dispersed in the resin B in the state of phase separation. The long axis of each dispersed particle of the resin A has a length of from 30 to 200 nm and the length ratio of the long axis to the short axis is from 2 to 15. The DSC endothermic quantity attributable to the resin A is from 8 to 20 J/g.
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公开(公告)号：US20170017175A1
公开(公告)日：2017-01-19
申请号：US15122087
申请日：2015-01-06
Applicant: Hiroshi YAMADA , Tsuyoshi SUGIMOTO , Susumu CHIBA , Shinsuke NAGAI , Kohsuke NAGATA , Shinya NAKAYAMA , Yuka MIZOGUCHI , Suzuka AMEMORI
Inventor： Hiroshi YAMADA , Tsuyoshi SUGIMOTO , Susumu CHIBA , Shinsuke NAGAI , Kohsuke NAGATA , Shinya NAKAYAMA , Yuka MIZOGUCHI , Suzuka AMEMORI
IPC: G03G9/00
CPC classification number: G03G9/08755 , G03G9/0806 , G03G9/08793 , G03G9/08795 , G03G9/08797 , G03G9/0904 , G03G15/08
Abstract: A toner including: a pigment; polyester resin A that is insoluble in tetrahydrofuran (THF); and polyester resin B that is soluble in THF, wherein the toner satisfies requirements (1) to (3) below:(1) the polyester resin A includes one or more aliphatic diols including from 3 through 10 carbon atoms, as a component constituting the polyester resin A; (2) the polyester resin B includes at least an alkylene glycol in an amount of 40 mol % or more, as a component constituting the polyester resin B; and (3) a glass transition temperature (Tg1st) of the toner at first heating in differential scanning calorimetry (DSC) of the toner is from 20° C. through 50° C.
Abstract translation: 一种调色剂，包括：颜料; 不溶于四氢呋喃（THF）的聚酯树脂A; 和可溶于THF的聚酯树脂B，其中调色剂满足以下要求（1）至（3）：（1）聚酯树脂A包括一种或多种包含3至10个碳原子的脂族二醇作为构成 聚酯树脂A; （2）作为构成聚酯树脂B的成分，聚酯树脂B至少含有40摩尔％以上的亚烷基二醇， 和（3）调色剂的差示扫描量热法（DSC）中第一次加热时调色剂的玻璃化转变温度（Tglst）为20℃至50℃。
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