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1.发明申请公开(公告)号：US20220373912A1
公开(公告)日：2022-11-24
申请号：US17874745
申请日：2022-07-27
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Daisuke TOMITA , Takahiro YAMASHITA , Yukiaki NAKAMURA , Takahisa TATEKAWA , Masaru TAKAHASHI
Abstract: A method for producing a resin fine particle includes dissolving or melting an oily mixture containing at least a polyester resin, a base, and a basic dye while applying a shearing force to the oily mixture, and emulsifying the dissolved or molten oily mixture by adding a surfactant and an aqueous medium while applying a shearing force to the dissolved or molten oily mixture to prepare a dispersion liquid of the resin fine particle. The resin fine particle includes the polyester resin and the basic dye, has a volume average particle diameter of 0.05 μm or more and 1 μm or less, and has a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle of 0.8 or more.
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公开(公告)号：US20220308484A1
公开(公告)日：2022-09-29
申请号：US17462292
申请日：2021-08-31
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Ryutaro KEMBO , Yukiaki NAKAMURA , Masaru TAKAHASHI
Abstract: A method for producing a toner for developing an electrostatic charge image includes: performing first aggregation that involves, in a dispersion containing first amorphous resin particles, aggregating at least the first amorphous resin particles; performing second aggregation that involves, in a dispersion that contains second amorphous resin particles and first aggregated particles obtained by aggregating the first amorphous resin particles, aggregating the second amorphous resin particles around the first aggregated particles; and heating a dispersion that contains second aggregated particles obtained by aggregating the second amorphous resin particles around the first aggregated particles so as to fuse and coalesce the second aggregated particles and form toner particles, in which a volume-average particle diameter DB of the second amorphous resin particles is smaller than a volume-average particle diameter DA of the first amorphous resin particles, and the first amorphous resin particles have a glass transition temperature of 50° C. or higher, and the second amorphous resin particles have a glass transition temperature of 50° C. or higher and 63° C. or lower.
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公开(公告)号：US20220373905A1
公开(公告)日：2022-11-24
申请号：US17404729
申请日：2021-08-17
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Yukiaki NAKAMURA , Daisuke NOGUCHI , Masaru TAKAHASHI , Kazuhiko NAKAMURA
Abstract: An electrostatic charge image developing toner includes a toner particle, and the toner particle includes: a core particle containing a large-diameter particle having a number average particle diameter of 1 μm or more; and a shell layer that includes at least two resin layers each containing an amorphous resin and covers a surface of the core particles, and an outermost layer of the at least two resin layers is a resin layer being made of the amorphous resin.
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公开(公告)号：US20210253750A1
公开(公告)日：2021-08-19
申请号：US16921885
申请日：2020-07-06
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Ryutaro KEMBO , Masaru TAKAHASHI , Yukiaki NAKAMURA , Tomoaki TANAKA , Satomi HARA
IPC: C08F12/08 , C08G65/34 , C08G63/672 , C08K5/3437 , C08K5/32
Abstract: A resin particle includes a fluorescent colorant and a color pigment. A hue angle of the resin particle and a hue angle of the fluorescent colorant are different from each other. When a fluorescence peak wavelength in a spectral reflectance of the fluorescent colorant is represented by A (nm), an integrated value of a spectral reflectance (%) of the color pigment in a wavelength range of from A−30 (nm) to A+30 (nm) is 2,500 or more.
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公开(公告)号：US20240329553A1
公开(公告)日：2024-10-03
申请号：US18586945
申请日：2024-02-26
Applicant: FUJIFILM BUSINESS INNOVATION CORP.
Inventor： Kohei MANABE , Yukiaki NAKAMURA , Takahisa TATEKAWA
CPC classification number: G03G9/0926 , G03G9/0819 , G03G15/0184
Abstract: A toner set includes two colors of fluorescent toners. A difference between wavelengths of fluorescent light emitted by the two colors of fluorescent toners is 50 nm or more, and at least one of the two colors of fluorescent toners includes only an aggregation-induced emission colorant serving as a fluorescent colorant.
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Patent Agency Ranking
公开(公告)号：US20240319627A1
公开(公告)日：2024-09-26
申请号：US18582078
申请日：2024-02-20
Applicant: FUJIFILM BUSINESS INNOVATION CORP.
Inventor： Takahisa TATEKAWA , Yukiaki NAKAMURA , Kohei MANABE
CPC classification number: G03G9/0926 , C09K11/06 , G03G9/08755 , G03G9/0918 , G03G9/0928 , G03G15/08 , C09K2211/10
Abstract: A fluorescent green toner includes toner particles including a fluorescent yellow dye Sy, a peak wavelength of a spectral reflectance of the fluorescent yellow dye Sy being at 500 nm or more and 550 nm or less, a yellow pigment Py, and at least one pigment Pgc selected from the group consisting of a green pigment and a cyan pigment, wherein CSy/(CPy+CPgc) is 0.01 or more and 0.3 or less, and (CSy+CPy)/CPgc is 0.3 or more and 1.5 or less, where CSy, CPy, and CPgc represent contents of the fluorescent yellow dye Sy, the yellow pigment Py, and the pigment Pgc in the toner particles, respectively.
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公开(公告)号：US20230384701A1
公开(公告)日：2023-11-30
申请号：US18155039
申请日：2023-01-16
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Kohei MANABE , Yukiaki NAKAMURA , Takahisa TATEKAWA
CPC classification number: G03G9/0926 , G03G15/0126 , G03G15/0865 , G03G9/0908 , G03G9/0924 , G03G9/0912 , G03G9/091
Abstract: An electrostatic charge image developing toner contains toner particles that contain an organic colorant and a binder resin, in which the organic colorant includes a non-fluorescent organic pigment and a fluorescent organic pigment, a total content of the organic colorant is 5% by mass or more and 20% by mass or less with respect to a total mass of the toner particles, and a specific gravity D1 of the non-fluorescent organic pigment and a specific gravity D2 of the fluorescent organic pigment satisfy both of Formulas (1) and (2).
D1≥2.0 Formula (1)
D1−D2≥0.6 Formula (2).-
公开(公告)号：US20230384700A1
公开(公告)日：2023-11-30
申请号：US18154049
申请日：2023-01-13
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Takahisa TATEKAWA , Yukiaki NAKAMURA , Kohei MANABE
CPC classification number: G03G9/0926 , G03G9/0918 , G03G9/08782 , G03G9/0935 , G03G9/09307 , G03G15/0105 , C09K11/06 , C09K2211/10
Abstract: A fluorescent green toner contains toner particles containing a binder resin, a release agent, a fluorescent pigment having a hydrophilic group, and a pigment having a halogen atom.
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公开(公告)号：US20220373918A1
公开(公告)日：2022-11-24
申请号：US17412458
申请日：2021-08-26
Applicant: FUJIFILM BUSINESS INNOVATION CORP.
Inventor： Asafumi FUJITA , Yukiaki NAKAMURA , Masaru TAKAHASHI
Abstract: A toner for developing an electrostatic charge image includes toner particles that include a binder resin, a releasing agent, a brilliant pigment, and an aminocarboxylic acid compound.
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公开(公告)号：US20220244663A1
公开(公告)日：2022-08-04
申请号：US17397232
申请日：2021-08-09
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Masato ONO , Masayuki SEKO , Tomoaki TANAKA , Yukiaki NAKAMURA , Ryutaro KEMBO
IPC: G03G15/16
Abstract: A unit includes: a developing device configured to develop an electrostatic charge image that is formed on a surface of an image carrier, as a toner image with a developer including a flat toner containing a flat pigment, the developer being accommodated in the developing device; and a transfer device including an intermediate transfer belt onto which the toner image formed on the surface of the image carrier is primarily transferred, a primary transfer device configured to primarily transfer the toner image formed on the surface of the image carrier to a surface of the intermediate transfer belt, and a secondary transfer device configured to secondarily transfer the toner image on the surface of the intermediate transfer belt to a surface of a recording medium, wherein the intermediate transfer belt contains a resin and conductive carbon particles, and after the flat toner adheres to an outer circumferential surface of the intermediate transfer belt in a loading amount of 3 g/cm2, in a case where air is blown to the outer circumferential surface from an upper side of the outer circumferential surface while increasing a blowing pressure, all the flat toner adhering to the outer circumferential surface is separated from the outer circumferential surface at a blowing pressure of 25 kPa or less.
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