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    Method for manufacturing toner for electrostatic charge image development
    2.
    发明授权
    Method for manufacturing toner for electrostatic charge image development 有权

    公开(公告)号：US12061440B2

    公开(公告)日：2024-08-13

    申请号：US17418941

    申请日：2019-12-26

    Applicant: ZEON CORPORATION

    Inventor： Kojiro Akazaki ,  Takeru Chiba ,  Takashi Iga

    IPC: G03G9/087 ,  G03G9/08

    CPC classification number: G03G9/081 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797

    Abstract: The present invention provides a method for producing a toner for electrostatic-image development comprising: a dispersing step of performing a dispersing treatment in which a cavitation effect is obtained on a color resin particle containing a binder resin, a colorant, a charge control agent, and a release agent in an aqueous dispersion medium so as to obtain a dispersion of the color resin particle; and a heating step of performing a heat treatment on the dispersion of the color resin particle at a temperature of equal to or more than a glass transition temperature of the color resin particle and 95° C. or less for a heating time of 5 minutes or more and 10 hours or less.

    ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
    3.
    发明公开
    ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD 审中-公开

    公开(公告)号：US20240192619A1

    公开(公告)日：2024-06-13

    申请号：US18325961

    申请日：2023-05-30

    Applicant: FUJIFILM Business Innovation Corp.

    Inventor： Daisuke ISHIZUKA ,  Erina SAITO ,  Tsutomu FURUTA ,  Daisuke NAKASHIMA

    IPC: G03G9/087 ,  G03G9/08

    CPC classification number: G03G9/08797 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/08795

    Abstract: An electrostatic charge image developing toner that contains toner particles containing a binder resin containing an amorphous resin and a crystalline resin, and satisfying the following condition (1) and condition (2),
    condition (1): in a case where differential scanning calorimetry is performed by the following thermal process (1), a total amount of heat generated at an exothermic peak in a temperature range of 30° C. or higher and 70° C. or lower during a reheating period is more than 0.5 J/g,
    condition (2): in a case where differential scanning calorimetry is performed by the following thermal process (2), a total amount of heat generated at an exothermic peak in a temperature range of 30° C. or higher and 70° C. or lower during a reheating period is 0.5 J/g or less,
    thermal process (1): heating to 150° C. from 0° C. at a rate of 10° C./min, then cooling to 0° C. from 150° C. at a rate of 50° C./min, followed by reheating to 150° C. from 0° C. at a rate of 10° C./min,
    thermal process (2): heating to 150° C. from 0° C. at a rate of 10° C./min, then cooling to 0° C. from 150° C. at a rate of 1° C./min, followed by reheating to 150° C. from 0° C. at a rate of 10° C./min.

    IMAGE FORMING APPARATUS
    7.
    发明申请
    IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：US20190086827A1

    公开(公告)日：2019-03-21

    申请号：US15943268

    申请日：2018-04-02

    Applicant: FUJI XEROX CO., LTD.

    Inventor： Takafumi KOIDE ,  Masataka KURIBAYASHI ,  Yusuke FUKUDA ,  Katsuyuki KITAJIMA ,  Teppei YAWADA ,  Shota OSHIMA ,  Masahiro UCHIDA

    IPC: G03G9/00 ,  G03G9/087 ,  G03G9/08

    CPC classification number: G03G9/08755 ,  G03G9/0821 ,  G03G9/0823 ,  G03G9/08795 ,  G03G9/08797 ,  G03G15/08 ,  G03G15/1605

    Abstract: An image forming apparatus includes an image holding member, a charging device that charges a surface of the image holding member, an electrostatic charge image forming device that forms an electrostatic charge image on the charged surface of the image holding member, a developing device that has an electrostatic charge image developer containing an electrostatic charge image developing toner and that develops the electrostatic charge image to form a toner image on the surface of the image holding member, and a transfer device that transfers the toner image onto a recording medium, wherein the transfer device includes a belt member and a transfer member, the belt member has an outer surface that contacts the image holding member, and the belt member is winding around the image holding member and the transfer member; and the toner has a binder resin containing an amorphous polyester resin.

    METHOD FOR PRODUCING BINDER RESIN
    8.
    发明申请
    METHOD FOR PRODUCING BINDER RESIN 审中-公开

    公开(公告)号：US20190072867A1

    公开(公告)日：2019-03-07

    申请号：US16114495

    申请日：2018-08-28

    Applicant: KAO CORPORATION

    Inventor： Norihiro FUKURI ,  Takashi Kubo

    IPC: G03G9/087

    CPC classification number: G03G9/08755 ,  C08G63/547 ,  C08G63/672 ,  G03G9/08795 ,  G03G9/08797

    Abstract: An embodiment of the present invention relates to a method for producing a binder resin, from which a toner having excellent low-temperature fusing property, roller release properties, and pulverization properties, is obtained, a binder resin, and a toner for development of electrostatic images including the binder resin.An embodiment of the present invention relates to a method for producing a binder resin including the following steps (1) and (2): step (1): mixing an aromatic alcohol including an alkylene oxide adduct of bisphenol A and fumaric acid; and step (2): further adding a carboxylic acid to the mixture obtained in the step (1) and mixing until a softening point of the binder resin in the system falls within the predetermined range, wherein in the molecular weight distribution measured by gel permeation chromatography, the binder resin includes 40% or more of components having a molecular weight of 10,000 or more and has a peak top of molecular weight distribution within a range of 7,500 or more and 10,000 or less.

    ELECTROSTATIC LATENT IMAGE DEVELOPING TONER
    9.
    发明申请
    ELECTROSTATIC LATENT IMAGE DEVELOPING TONER 审中-公开

    公开(公告)号：US20180348655A1

    公开(公告)日：2018-12-06

    申请号：US15989397

    申请日：2018-05-25

    Applicant: KYOCERA Document Solutions Inc.

    Inventor： Kohei YAMAUCHI ,  Toshiki TAKEMORI

    IPC: G03G9/087 ,  G03G9/08

    CPC classification number: G03G9/08755 ,  G03G9/0819 ,  G03G9/08711 ,  G03G9/08728 ,  G03G9/08782 ,  G03G9/08795 ,  G03G9/08797

    Abstract: Toner particles of a toner contain a non-crystalline polyester resin, a crystalline polyester resin, a styrene-acrylic acid-based resin, and an ester wax. The crystalline polyester resin has a repeating unit derived from an acrylic acid-based monomer and a repeating unit derived from a styrene-based monomer. The styrene-acrylic acid-based resin has a repeating unit derived from an acrylic acid-based monomer having an amino group and a repeating unit derived from a styrene-based monomer. An amino group ratio in the styrene-acrylic acid-based resin is at least 40% and no greater than 60%. The toner has a storage elastic modulus of at least 1.00×105 Pa and no greater than 5.00×105 Pa at 90° C. The ester wax has a melting point of at least 60° C. and no higher than 80° C. A dispersion diameter of the ester wax in the toner particles is at least 500 nm and no greater than 1,000 nm.

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