Title:
METHOD FOR PRODUCING TONER PARTICLES
Document Type and Number:
Japanese Patent JP2020016714
Kind Code:
A
Abstract:
To provide a toner that is excellent in mechanical strength and charging property and has a small particle diameter with high production efficiency, in a concentration step of increasing a solid content ratio of the toner in an aqueous medium.SOLUTION: A method for producing toner particles includes a concentration step of increasing a solid content ratio of a toner in an aqueous medium with respect to a toner precursor containing a binder resin and a coloring agent and a toner precursor dispersion containing an aqueous medium, in which the concentration step is performed using a centrifugal separator, di- or higher metal ions are contained in the aqueous medium, a content concentration of the di- or higher metal ions contained in the aqueous medium is 4.0 mmol/L or more and 25.0 mmol/L or less, and when a ratio of the toner precursor in the toner precursor dispersion after the concentration step is represented by ratio A, the ratio A is 10 mass% or more and 60 mass% or less.SELECTED DRAWING: None
More Like This:
Inventors:
HASHIMOTO YASUHIRO
TSUJINO TAKESHI
ASAOKA JUNYA
SASANO MASARU
INOUE KOKI
KATAYAMA KENTA
TSUJINO TAKESHI
ASAOKA JUNYA
SASANO MASARU
INOUE KOKI
KATAYAMA KENTA
Application Number:
JP2018138168A
Publication Date:
January 30, 2020
Filing Date:
July 24, 2018
Export Citation:
Assignee:
CANON KK
International Classes:
G03G9/08; G03G9/087
Domestic Patent References:
| JP2004004652A | 2004-01-08 | |||
| JP2014155893A | 2014-08-28 | |||
| JP2007075679A | 2007-03-29 | |||
| JP2018060009A | 2018-04-12 |
Attorney, Agent or Firm:
Yoshihiro Yamaguchi
Keisuke Watanabe
Keisuke Watanabe