Toner

Patent metadata

Field	Value
Publication number	US-2022026821-A1
Application number	US-202117377495-A
Country	US
Kind code	A1
Filing date	Jul 16, 2021
Priority date	Jul 22, 2020
Publication date	Jan 27, 2022
Grant date	—

Abstract

Toner comprising a toner particle comprising a core particle comprising a binder resin and a shell formed on a surface of the core particle, wherein given YA (number %) as an abundance ratio of particles with a particle perimeter of less than 6.332 μm, in a dispersion of the toner treated under the following ultrasound condition A, given XB as an average aspect ratio of the toner and YB (number %) as an abundance ratio of particles with a particle perimeter of less than 6.332 μm, in a dispersion of the toner treated under the following ultrasound condition B, 0.75≤XB≤0.85 and 0.10≤YA−YB≤2.50 are satisfied: where ultrasound condition A: output frequency 30 kHz, output capacity 15 W, ultrasound intensity 100%, exposure time 300 s, and ultrasound condition B: output frequency 30 kHz, output capacity 15 W, ultrasound intensity 5%, exposure time 300 s.

First claim

What is claimed is:

1 . A toner comprising a toner particle comprising
a core particle comprising a binder resin and a shell formed on a surface of the core particle, wherein given YA (number %) as an abundance ratio of particles with a particle perimeter of less than 6.332 μm, as measured with a flow particle image measurement apparatus, in a dispersion of the toner treated under the following ultrasound condition A, and given XB as an average aspect ratio of the toner and YB (number %) as an abundance ratio of particles with a particle perimeter of less than 6.332 μm, as measured with a flow particle image measurement apparatus, in a dispersion of the toner treated under the following ultrasound condition B, formulae (1) and (2) below are satisfied:
0.75≤ XB≤ 0.85  (1)

0.10≤ YA−YB≤ 2.50  (2)

where
the ultrasound condition A: output frequency 30 kHz, output capacity 15 W, ultrasound intensity 100%, exposure time 300 s, and
the ultrasound condition B: output frequency 30 kHz, output capacity 15 W, ultrasound intensity 5%, exposure time 300 s.

2 . The toner according to claim 1 , wherein given XA as an average aspect ratio of the toner, as measured with a flow particle image measurement apparatus, in a dispersion of the toner treated under the ultrasound condition A, formula (3) below is satisfied:
0.75≤ XA≤ 0.85  (3).

3 . The toner according to claim 1 , wherein the YB is not more than 60.00 number %.

4 . The toner according to claim 2 , wherein the YB is not more than 60.00 number %.

5 . The toner according to claim 1 , wherein the toner particle comprises a surfactant.

6 . The toner according to claim 2 , wherein the toner particle comprises a surfactant.

7 . The toner according to claim 3 , wherein the toner particle comprises a surfactant.

8 . The toner according to claim 4 , wherein the toner particle comprises a surfactant.

9 . The toner according to claim 5 , wherein the surfactant is contained in the shell.

10 . The toner according to claim 6 , wherein the surfactant is contained in the shell.

11 . The toner according to claim 7 , wherein the surfactant is contained in the shell.

12 . The toner according to claim 8 , wherein the surfactant is contained in the shell.

13 . The toner according to claim 5 , wherein a ratio of the surfactant in the surface of the toner is 5 to 100 ppm as measured by time-of-flight second ion mass spectrometry (TOF-SIMS).

14 . The toner according to claim 6 , wherein a ratio of the surfactant in the surface of the toner is 5 to 100 ppm as measured by time-of-flight second ion mass spectrometry (TOF-SIMS).

15 . The toner according to claim 7 , wherein a ratio of the surfactant in the surface of the toner is 5 to 100 ppm as measured by time-of-flight second ion mass spectrometry (TOF-SIMS).

16 . The toner according to claim 8 , wherein a ratio of the surfactant in the surface of the toner is 5 to 100 ppm as measured by time-of-flight second ion mass spectrometry (TOF-SIMS).

17 . The toner according to claim 9 , wherein a ratio of the surfactant in the surface of the toner is 5 to 100 ppm as measured by time-of-flight second ion mass spectrometry (TOF-SIMS).

18 . The toner according to claim 10 , wherein a ratio of the surfactant in the surface of the toner is 5 to 100 ppm as measured by time-of-flight second ion mass spectrometry (TOF-SIMS).

19 . The toner according to claim 11 , wherein a ratio of the surfactant in the surface of the toner is 5 to 100 ppm as measured by time-of-flight second ion mass spectrometry (TOF-SIMS).

20 . The toner according to claim 12 , wherein a ratio of the surfactant in the surface of the toner is 5 to 100 ppm as measured by time-of-flight second ion mass spectrometry (TOF-SIMS).

Assignees

• Canon Kk

Inventors

• Amano Shota
• Tsujino Takeshi
• Asaoka Junya
• Sasano Yuu
• Terui Yuhei
• Inoue Koki
• Yamashita Shohei

Classifications

• G03G9/09307

  specified by the shell material · CPC title

• G03G9/09335

  Non-macromolecular organic compounds · CPC title

• G03G9/09392

  Preparation thereof · CPC title

• G03G9/0819 Primary

  characterised by the dimensions of the particles · CPC title