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1.发明授权公开(公告)号：US12130586B2
公开(公告)日：2024-10-29
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
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0819 , G03G9/0904
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：US12204276B2
公开(公告)日：2025-01-21
申请号：US17406271
申请日：2021-08-19
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Takahisa Tatekawa , Daisuke Tomita , Daisuke Noguchi , Kazuhiko Nakamura , Yuji Isshiki
IPC: G03G9/08
Abstract: A preparing method of an electrostatic charge image developing toner includes: aggregating binder resin particles in a dispersion containing the binder resin particles to form aggregated particles; and coalescing the aggregated particles by heating a dispersion containing the aggregated particles to form toner particles. The aggregating includes stirring the dispersion in the aggregating at a required stirring power of 1.0 kW/m3 or more and 6.0 kW/m3 or less per unit volume, and the preparing method satisfies the following Requirement (1), in which Requirement (1): a viscosity of the dispersion during the stirring is 5 Pa·s or more and 50 Pa·s or less at a shear rate of 1/s, where the viscosity of the dispersion is measured at a sample temperature of 25° C. using a part of the dispersion as a sample.
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公开(公告)号：US20230384699A1
公开(公告)日：2023-11-30
申请号：US18154048
申请日：2023-01-13
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Yukiaki NAKAMURA , Takahisa Tatekawa , Kohei Manabe
CPC classification number: G03G9/091 , G03G9/08728 , G03G13/0133 , G03G2215/066 , G03G2221/183
Abstract: An electrostatic charge image developing green toner contains green toner particles containing a binder resin, an azomethine fluorescent pigment having an emission peak in a wavelength region of 500 nm or more and 550 nm or less in an emission spectrum, and a non-fluorescent pigment having a reflection peak in a wavelength region of 480 nm or more and 540 nm or less in a reflection spectrum, in which a mass-based ratio M2/M1 of a content M2 of the non-fluorescent pigment to a content M1 of the azomethine fluorescent pigment is 0.05 or more and 1.5 or less, and a total content of the azomethine fluorescent pigment and the non-fluorescent pigment with respect to a total amount of the green toner particles is 5% by mass or more and 15% by mass or less.
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4.发明授权公开(公告)号：US12025950B2
公开(公告)日：2024-07-02
申请号：US16985688
申请日：2020-08-05
Applicant: FUJIFILM BUSINESS INNOVATION CORP.
Inventor： Daisuke Tomita , Takahiro Yamashita , Yukiaki Nakamura , Takahisa Tatekawa , Masaru Takahashi
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0819 , G03G9/0904
Abstract: A resin fine particle includes a polyester resin; and a basic dye, in which a volume average particle diameter of the resin fine particle is 0.05 μm or more and 1 μm or less, and 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 is 0.8 or more.
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