US 9,811,015 B2
Toner particle, electrophotographic toner, developing agent, toner cartridge and image forming apparatus, and manufacture method of toner particle
Takashi Urabe, Shizuoka (JP); Taishi Takano, Shizuoka (JP); Junichi Ishikawa, Shizuoka (JP); and Maiko Yoshida, Shizuoka (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Minato-ku, Tokyo (JP); and TOSHIBA TEC KABUSHIKI KAISHA, Shinagawa-ku, Tokyo (JP)
Filed on Nov. 23, 2015, as Appl. No. 14/948,580.
Prior Publication US 2017/0146918 A1, May 25, 2017
Int. Cl. G03G 9/08 (2006.01); G03G 9/093 (2006.01)
CPC G03G 9/093 (2013.01) [G03G 9/0821 (2013.01); G03G 9/09392 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A toner particle, including:
two or more glass transition temperatures, wherein
a first glass transition temperature for a core of the toner particle is in a first range from 5 degrees centigrade to equal to or less than 9 degrees centigrade;
a second glass transition temperature for a shell of the toner particle is in a second range from 50 degrees centigrade to 65 degrees centigrade, and
a difference between the first glass transition temperature and the second glass transition temperature is within a third range from 40 degrees centigrade to 50 degrees centigrade.