公开(公告)号：US20240192620A1

公开(公告)日：2024-06-13

申请号：US18518001

申请日：2023-11-22

Applicant: Yuka Mizoguchi ,  Akio Takei ,  Junichi Watanabe ,  Akinori Saitoh ,  Masahiro Yukikawa

Inventor： Yuka Mizoguchi ,  Akio Takei ,  Junichi Watanabe ,  Akinori Saitoh ,  Masahiro Yukikawa

IPC: G03G9/093 ,  G03G9/08

CPC classification number: G03G9/09371 ,  G03G9/0819

Abstract: A resin particle contains an amorphous resin, a crystalline resin C containing a biomass-derived resin, and at least one of polyethylene terephthalate or polybutylene terephthalate, wherein the resin particle has a core-shell structure comprising a core resin and a shell resin, the core resin comprises the crystalline resin C, and the proportion of the total mass of the biomass-derived resin, the polyethylene terephthalate, and the polybutylene terephthalate to the resin particle at 100 percent by mass is 30 or more percent by mass.

公开(公告)号：US12204277B2

公开(公告)日：2025-01-21

申请号：US17678125

申请日：2022-02-23

Applicant: Yasuo Kamada ,  Hiroshi Yamada ,  Toma Takebayashi ,  Akio Takei

Inventor： Yasuo Kamada ,  Hiroshi Yamada ,  Toma Takebayashi ,  Akio Takei

IPC: G03G9/08 ,  G03G9/087 ,  G03G15/02

Abstract: Provided is a toner including toner base particles and resin particles. Each toner base particle includes a binder resin, a colorant, and wax. Each resin particle e has a core-shell structure including a core and a shell, where a glass transition temperature TgA of the shell is higher than a glass transition temperature TgB of the core. A surface of each toner base particle is covered with the resin particles. A storage elastic modulus G′1 of the toner at 70° C. during heating is 1.0×105 Pa or greater but 1.0×103 Pa or less, and a storage elastic modulus G′2 of the toner at 100° C. during heating is 1.0×104 Pa or greater but 5.0×104 Pa or less, as the toner is measured by a rheometer.

公开(公告)号：US20220291602A1

公开(公告)日：2022-09-15

申请号：US17678125

申请日：2022-02-23

Applicant: Yasuo KAMADA ,  Hiroshi Yamada ,  Toma Takebayashi ,  Akio Takei

Inventor： Yasuo KAMADA ,  Hiroshi Yamada ,  Toma Takebayashi ,  Akio Takei

IPC: G03G9/08 ,  G03G9/087 ,  G03G15/02

Abstract: Provided is a toner including toner base particles and resin particles. Each toner base particle includes a binder resin, a colorant, and wax. Each resin particle e has a core-shell structure including a core and a shell, where a glass transition temperature TgA of the shell is higher than a glass transition temperature TgB of the core. A surface of each toner base particle is covered with the resin particles. A storage elastic modulus G′1 of the toner at 70° C. during heating is 1.0×105 Pa or greater but 1.0×103 Pa or less, and a storage elastic modulus G′2 of the toner at 100° C. during heating is 1.0×104 Pa or greater but 5.0×104 Pa or less, as the toner is measured by a rheometer.

公开(公告)号：US10571834B2

公开(公告)日：2020-02-25

申请号：US16266149

申请日：2019-02-04

Applicant: Ryohei Matsuda ,  Takamasa Hase ,  Daisuke Inoue ,  Teppei Kawata ,  Akio Takei

Inventor： Ryohei Matsuda ,  Takamasa Hase ,  Daisuke Inoue ,  Teppei Kawata ,  Akio Takei

IPC: G03G15/20 ,  G03G9/08 ,  G03G9/087

Abstract: A fixing method is provided including the step of fixing a toner on a recording medium with a fixing device. The toner has a binder resin, a colorant, and a release agent, and has a release agent amount indicator of from 0.01 to 0.20. The release agent amount indicator is represented by a ratio (P2850/P828) of an intensity (P2850) at a wave number of 2,850 cm−1 to an intensity (P828) at a wave number of 828 cm−1 of the toner measured by a Fourier transform infrared spectroscopy attenuated total reflection method. The fixing device includes a fixing rotator driven to rotate by a driving source, a pressure rotator driven to rotate by rotation of the fixing rotator, a fixing belt interposed between the fixing rotator and the pressure rotator, and a heater to heat the fixing belt.

公开(公告)号：US09989869B2

公开(公告)日：2018-06-05

申请号：US15541053

申请日：2016-01-05

Applicant: Daisuke Inoue ,  Naohiro Watanabe ,  Ryota Inoue ,  Masana Shiba ,  Junichi Awamura ,  Shingo Sakashita ,  Tomoki Murayama ,  Yoshitsugu Kimura ,  Rintaro Takahashi ,  Akio Takei

Inventor： Daisuke Inoue ,  Naohiro Watanabe ,  Ryota Inoue ,  Masana Shiba ,  Junichi Awamura ,  Shingo Sakashita ,  Tomoki Murayama ,  Yoshitsugu Kimura ,  Rintaro Takahashi ,  Akio Takei

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/093

CPC classification number: G03G9/0821 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08793 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09392

Abstract: A toner comprising a binder resin and a release agent, wherein the toner has a difference of 30 or less between a maximum value and a minimum value among peak intensities in a range of Molecular weight M±300 where Molecular weight M is a molecular weight selected from a range of from 300 through 5,000 in a molecular weight distribution of tetrahydrofuran (THF)-soluble components in the toner as measured by gel permeation chromatography (GPC), and wherein the peak intensities are defined as relative values assuming a maximum peak value in molecular weights of 20,000 or less is 100, in a molecular weight distribution curve taking an intensity as a vertical axis and a molecular weight as a horizontal axis as measured by GPC.

公开(公告)号：US20230147363A1

公开(公告)日：2023-05-11

申请号：US17982521

申请日：2022-11-08

Applicant: Ryuuta YOSHIDA ,  Akio TAKEI ,  Ryohei YAMAGUCHI ,  Toma TAKEBAYASHI

Inventor： Ryuuta YOSHIDA ,  Akio TAKEI ,  Ryohei YAMAGUCHI ,  Toma TAKEBAYASHI

IPC: G03G9/08 ,  G03G9/087

CPC classification number: G03G9/0825 ,  G03G9/08755 ,  G03G9/0806 ,  G03G9/0821 ,  G03G9/0827

Abstract: A toner includes: toner base particles each containing a binder resin; and resin particles on a surface of each of the toner base particles. A glass transition temperature (Tg) of the toner at the first heating in differential scanning calorimetry (DSC) is 20° C. or higher and 50° C. or lower. A glass transition temperature of a tetrahydrofuran (THF)-insoluble component of the toner at the first heating in DSC is −40° C. or higher and 10° C. or lower. An average circularity of the toner is 0.970 or more and 0.985 or less. A standard deviation of the average circularity is 0.020 or less.

公开(公告)号：US20230014605A1

公开(公告)日：2023-01-19

申请号：US17811054

申请日：2022-07-06

Applicant: Akinori SAITOH ,  Akio Takei ,  Toma Takebayashi ,  Masahiro Yukikawa ,  Tomomi Harashima ,  Hiroshi Yamada

Inventor： Akinori SAITOH ,  Akio Takei ,  Toma Takebayashi ,  Masahiro Yukikawa ,  Tomomi Harashima ,  Hiroshi Yamada

IPC: G03G9/087 ,  G03G9/08 ,  G03G9/093

Abstract: 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.

公开(公告)号：US20250013163A1

公开(公告)日：2025-01-09

申请号：US18762222

申请日：2024-07-02

Applicant: Suzuka Karato ,  Yuka Mizoguchi ,  Akio Takei ,  Junichi Watanabe ,  Shinya Nakayama

Inventor： Suzuka Karato ,  Yuka Mizoguchi ,  Akio Takei ,  Junichi Watanabe ,  Shinya Nakayama

IPC: G03G9/087 ,  G03G15/08 ,  G03G15/20

Abstract: A resin particle contains a resin B containing a component derived from at least one of polyethylene terephthalate or polybutylene terephthalate and a biomass-derived resin C containing a linear aliphatic alcohol with 2 to 4 carbon atoms and a linear aliphatic acid with 10 to 12 carbon atoms, wherein the resin particle has a core shell structure of a core resin and a shell resin, the core resin contains a crystalline resin, and the proportion of the sum of the resin B and the resin C to 100 percent by mass of the resin particle is 30 or greater percent by mass.

公开(公告)号：US20240392064A1

公开(公告)日：2024-11-28

申请号：US18669614

申请日：2024-05-21

Applicant: Shinya Nakayama ,  Junichi Watanabe ,  Akinori Saitoh ,  Masahiro Yukikawa ,  akio Takei

Inventor： Shinya Nakayama ,  Junichi Watanabe ,  Akinori Saitoh ,  Masahiro Yukikawa ,  akio Takei

IPC: C08G63/181 ,  C08J3/07 ,  C08L67/02 ,  G03G9/093

Abstract: A polyester resin emulsion contains resin particles(S), each containing a polyester resin (A) obtained by polycondensation of an alcohol component and a carboxylic acid component, and an aqueous medium in which the resin particles(S) are dispersed, wherein the alcohol component contains tri- or tetra-alcohol having a backbone of a linear or branched saturated fatty acid with a carbon number of 4 to 6, and the ratio (OHV/AV) of a hydroxyl value (OHV) of the polyester resin (A) to an acid value (AV) of the polyester resin (A) is from 0.20 to 0.60.

公开(公告)号：US20240210845A1

公开(公告)日：2024-06-27

申请号：US18543008

申请日：2023-12-18

Applicant: Junichi WATANABE ,  Akinori SAITOH ,  Masahiro YUKIKAWA ,  Akio TAKEI ,  Yuka MIZOGUCHI

Inventor： Junichi WATANABE ,  Akinori SAITOH ,  Masahiro YUKIKAWA ,  Akio TAKEI ,  Yuka MIZOGUCHI

IPC: G03G9/08 ,  G03G9/125 ,  G03G9/13

CPC classification number: G03G9/0804 ,  G03G9/125 ,  G03G9/13

Abstract: An amorphous polyester resin includes an environmentally friendly component. An environmentally friendly component content of the amorphous polyester resin is 40% by mass or greater and 80% by mass or less. The amorphous polyester resin is a sulfo group-containing amorphous polyester resin. A sulfo group content of the sulfo group-containing amorphous polyester resin is 2 mol % or greater and 10 mol % or less.