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Title:
TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, DEVELOPER, CONTAINER CONTAINING DEVELOPER, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
Document Type and Number:
Japanese Patent JP2012047990
Kind Code:
A
Abstract:

To provide a toner causing no filming and having stable low temperature fixability, high temperature offset resistance and heat-resistant storage property, and to provide a developer including the toner.

The toner for electrostatic charge image development contains at least a crystalline polyester and a non-crystalline polyester. The crystalline polyester has a melting point of 60 to 80°C. In differential scanning calorimetry of the toner, the toner satisfies (W1-W1')/W1<0.50, where W1 denotes a temperature width at 1/3 height of an endothermic peak of the crystalline polyester in the first temperature elevation period, and W1' denotes a temperature width at 1/3 height of an endothermic peak of the crystalline polyester after the toner is heated at 50°C for 24 hours.


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Inventors:
HOZUMI MAMORU
SUGIMOTO TSUTOMU
WATANABE SHINKO
SATO SATOYUKI
HANATANI SHINYA
UCHINOKURA OSAMU
Application Number:
JP2010190272A
Publication Date:
March 08, 2012
Filing Date:
August 27, 2010
Export Citation:
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Assignee:
RICOH CO LTD
International Classes:
G03G9/087
Domestic Patent References:
JP2008116613A2008-05-22
JP2004151535A2004-05-27
JP2006138919A2006-06-01
JP2009075586A2009-04-09
Attorney, Agent or Firm:
Masami Sakai
Norio Kagami



 
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