IP Library › Granted Patent US 9,335,647
Granted Patent B2
US 9,335,647 · App. 14/476,163 · Granted May 10, 2016

Electrostatic charge image developing toner, electrostatic charge image developer, toner cartridge, and process cartridge

Inventors: Daisuke Noguchi (Kanagawa, JP); Masaru Takahashi (Kanagawa, JP); Atsushi Sugitate (Kanagawa, JP); Shuji Sato (Kanagawa, JP)
Assignee: FUJI XEROX CO., LTD.
G03G9/0902G03G9/0819G03G9/0825G03G9/0827G03G9/08711G03G9/08728G03G9/08755G03G9/09733
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Quick Facts
Patent No.
US 9,335,647
App. No.
14/476,163
Granted
May 10, 2016
Kind
B2
Abstract

An electrostatic charge image developing toner includes toner particles containing a binder resin containing a polyester resin, a particle of at least one selected from a styrene-(meth)acrylic resin particle and an acrylic resin particle, and a brilliant pigment.

Claims (25)

1. An electrostatic charge image developing toner comprising:

toner particles containing

a binder resin containing a polyester resin;

particles of at least one selected from a styrene-(meth)acrylic resin particle and an acrylic resin particle; and

a brilliant pigment,

wherein the toner particles have a sea-island structure in which the binder resin represents a sea portion and the particles of at least one selected from a styrene-(meth)acrylic resin particle and an acrylic resin particle represents an island portion, and the particles of at least one selected from the styrene-(meth)acrylic resin particle and the acrylic resin particle are aggregated with the brilliant pigment such that the particles of the at least one selected from a styrene-(meth)acrylic resin particle and an acrylic resin particle are unevenly distributed around the brilliant pigment.

2. The electrostatic charge image developing toner according to claim 1 ,

wherein a content of the particles of at least one selected from the styrene-(meth) acrylic resin particle and the acrylic resin particle is from 3% by weight to 32% by weight with respect to the toner.

3. The electrostatic charge image developing toner according to claim 1 ,

wherein a number-average particle diameter of the particles of at least one selected from the styrene-(meth)acrylic resin particles and the acrylic resin particles is from 30 nm to 300 nm.

4. The electrostatic charge image developing toner according to claim 1 ,

wherein the brilliant pigment contains aluminum.

5. The electrostatic charge image developing toner according to claim 1 ,

wherein a content of the brilliant pigment is from 1% by weight to 50% by weight with respect to the toner.

6. The electrostatic charge image developing toner according to claim 1 ,

wherein a volume average particle diameter of the toner is from 5 μm to 20 μm.

7. The electrostatic charge image developing toner according to claim 1 ,

wherein the toner particles are flake shape particles.

8. The electrostatic charge image developing toner according to claim 1 ,

wherein a weight ratio of the particles of at least one selected from the styrene-(meth)acrylic resin particle and the acrylic resin particle and the brilliant pigment is in a range of 3:1 to 3:50.

9. An electrostatic charge image developer comprising the electrostatic charge image developing toner according to claim 1 .

10. A toner cartridge that accommodates the electrostatic charge image developing toner according to claim 1 , and is detachable from an image forming apparatus.

11. A process cartridge comprising:

a developing unit that accommodates the electrostatic charge image developer according to claim 9 , and develops an electrostatic charge image formed on a surface of an image holding member as a toner image with the electrostatic charge image developer,

wherein the process cartridge is detachable from an image forming apparatus.

Assignments (2)
CHANGE OF NAME Recorded Aug 12, 2021
From: FUJI XEROX CO., LTD.
To: FUJIFILM BUSINESS INNOVATION CORP.
Reel/Frame 058287/0056 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 3, 2014
From: NOGUCHI, DAISUKE; TAKAHASHI, MASARU; SUGITATE, ATSUSHI; SATO, SHUJI
To: FUJI XEROX CO., LTD.
Reel/Frame 033659/0541 →
Priority Claims (1)
JP 2014-002643 · Jan 9, 2014 · national
Continuity (1)
Related Publication 20150192872A1 · Jul 9, 2015