公开(公告)号：US10955764B2

公开(公告)日：2021-03-23

申请号：US16337515

申请日：2017-09-20

Applicant: ZEON CORPORATION

Inventor： Kojiro Akazaki ,  Junichi Takashima

IPC: G03G9/097 ,  G03G9/08 ,  G03G9/087

Abstract: A toner which is less likely to cause toner leakage and which is less likely to cause aggregation after being left to stand under a high temperature condition. A toner for developing electrostatic images, comprising colored resin particles comprising a binder resin and a colorant, and an external additive, wherein a conditioned bulk density obtained by a powder flowability analyzing device is from 0.525 g/mL to 0.565 g/mL.

公开(公告)号：US20190227450A1

公开(公告)日：2019-07-25

申请号：US16337515

申请日：2017-09-20

Applicant: ZEON CORPORATION

Inventor： Kojiro Akazaki ,  Junichi Takashima

IPC: G03G9/087 ,  G03G9/08

Abstract: A toner which is less likely to cause toner leakage and which is less likely to cause aggregation after being left to stand under a high temperature condition. A toner for developing electrostatic images, comprising colored resin particles comprising a binder resin and a colorant, and an external additive, wherein a conditioned bulk density obtained by a powder flowability analyzing device is from 0.525 g/mL to 0.565 g/mL.

公开(公告)号：US10386739B2

公开(公告)日：2019-08-20

申请号：US15945145

申请日：2018-04-04

Applicant: ZEON CORPORATION

Inventor： Ryo Tsumura ,  Junichi Takashima ,  Fuminari Oyama

IPC: G03G9/08 ,  G03G9/09 ,  G03G9/087

Abstract: The present invention is to provide a toner production method configured to prevent scale formation, be resistant to pipe clogging, and realize stable and efficient toner production, even in the case of long-term continuous production. Disclosed is a toner production method comprising: a dispersing step for obtaining a colorant dispersion by, in a stirring tank, (a) dispersing or dissolving a colorant and a charge control agent in a polymerizable monomer, or (b) dispersing or dissolving a binder resin, a colorant and a charge control agent in an organic solvent, and a droplets forming step by suspending the colorant dispersion in an aqueous dispersion medium, wherein, in the dispersing step, the binder resin, colorant or charge control agent is added to the polymerizable monomer or organic solvent in the stirring tank, from a hopper, through a pipe heated by a heating device.

公开(公告)号：US20180292764A1

公开(公告)日：2018-10-11

申请号：US15945145

申请日：2018-04-04

Applicant: ZEON CORPORATION

Inventor： Ryo Tsumura ,  Junichi Takashima ,  Fuminari Oyama

IPC: G03G9/08 ,  G03G9/087 ,  G03G9/09

CPC classification number: G03G9/0806 ,  G03G9/0812 ,  G03G9/08728 ,  G03G9/08793 ,  G03G9/0918

Abstract: The present invention is to provide a toner production method configured to prevent scale formation, be resistant to pipe clogging, and realize stable and efficient toner production, even in the case of long-term continuous production. Disclosed is a toner production method comprising: a dispersing step for obtaining a colorant dispersion by, in a stirring tank, (a) dispersing or dissolving a colorant and a charge control agent in a polymerizable monomer, or (b) dispersing or dissolving a binder resin, a colorant and a charge control agent in an organic solvent, and a droplets forming step by suspending the colorant dispersion in an aqueous dispersion medium, wherein, in the dispersing step, the binder resin, colorant or charge control agent is added to the polymerizable monomer or organic solvent in the stirring tank, from a hopper, through a pipe heated by a heating device.