Title:
静電荷像現像用トナー、現像剤、画像形成方法および画像形成装置
Document Type and Number:
Japanese Patent JP4003877
Kind Code:
B2
Abstract:
Spherical toners having excellent fusibility are disclosed. The toners are fusible at low temperatures and are excellent in preservability and therefore charge properties, flowability, and transferability do not deteriorate. The toners contain a colorant and a nitrogen-containing polyester resin, in which the concentration of nitrogen at the surface of toner particles is higher than the concentration of nitrogen of the entire particles. The ratio of the surface concentration to the overall concentration is from 1.2 to 10. Additionally, the nitrogen-containing resin is preferably a polyester resin modified by urea bonds. Also, it is preferred that the toner particles are substantially spherical having an average sphericity E of from 0.90 to 0.99.
Inventors:
Hideki Sugiura
Ken Mochizuki
Yasutaka Iwamoto
Kazuhiko Umemura
Yasuo Asahina
Shinya Nakayama
Ken Mochizuki
Yasutaka Iwamoto
Kazuhiko Umemura
Yasuo Asahina
Shinya Nakayama
Application Number:
JP2003013349A
Publication Date:
November 07, 2007
Filing Date:
January 22, 2003
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03G9/087; G03G9/08; G03G9/093; G03G9/10
Domestic Patent References:
| JP8015901A | ||||
| JP8030026A | ||||
| JP11149181A | ||||
| JP5297622A | ||||
| JP2000298376A | ||||
| JP2000250265A | ||||
| JP10319636A | ||||
| JP6130713A | ||||
| JP2002284881A |
Attorney, Agent or Firm:
Masami Sakai
Norio Kagami
Hidetake Komatsu
Norio Kagami
Hidetake Komatsu