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公开(公告)号：US11061343B2
公开(公告)日：2021-07-13
申请号：US16793039
申请日：2020-02-18
申请人： Yuka Mizoguchi , Ryota Inoue , Hiroshi Yamashita , Minoru Masuda , Daichi Hisakuni , Tomomi Harashima
发明人： Yuka Mizoguchi , Ryota Inoue , Hiroshi Yamashita , Minoru Masuda , Daichi Hisakuni , Tomomi Harashima
摘要： A toner including: a plate-shaped pigment containing a metal as a main component; and a binder resin containing polyester resin (A) that is insoluble in THF, wherein: a weight average molecular weight (Mw) of a tetrahydrofuran (THF)-soluble component of the toner as determined by gel permeation chromatography (GPC) is 5,000 or higher but 14,000 or lower; and a glass transition temperature (Tg) of a THF-insoluble component of the toner as determined from a differential scanning colorimetry (DSC) curve at first heating in DSC is −60° C. or higher but 10° C. or lower.
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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
申请人： Minoru Masuda , Hiroshi Yamashita , Ryota Inoue , Yuka Mizoguchi , Daichi Hisakuni , Tomomi Harashima
发明人： Minoru Masuda , Hiroshi Yamashita , Ryota Inoue , Yuka Mizoguchi , Daichi Hisakuni , Tomomi Harashima
摘要： 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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公开(公告)号：US20220057726A1
公开(公告)日：2022-02-24
申请号：US17407266
申请日：2021-08-20
摘要： 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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公开(公告)号：US12078961B2
公开(公告)日：2024-09-03
申请号：US17407266
申请日：2021-08-20
CPC分类号： G03G9/08755 , G03G9/0804 , G03G9/0821 , G03G9/08711 , G03G15/0813
摘要： 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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公开(公告)号：US20220197165A1
公开(公告)日：2022-06-23
申请号：US17557284
申请日：2021-12-21
摘要： Provided is a toner including toner base particles. Each toner base particle includes a crosslinked component. The crosslinked component includes a nonlinear polymer having 3 or more branches, terminals of which are metal ion crosslinked, and a glass transition temperature Tg of the nonlinear polymer as measured by differential scanning calorimetry is −60° C. or higher but lower than 0° C.
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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
申请人： Akinori SAITOH , Akio Takei , Toma Takebayashi , Masahiro Yukikawa , Tomomi Harashima , Hiroshi Yamada
发明人： Akinori SAITOH , Akio Takei , Toma Takebayashi , Masahiro Yukikawa , Tomomi Harashima , Hiroshi Yamada
摘要： 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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