US 12,292,713 B2
Toner and method for producing the same
Hisasuke Kajihara, Ibaraki (JP); Yuya Chimoto, Chiba (JP); Junichi Tamura, Ibaraki (JP); Kazuhisa Shirayama, Tokyo (JP); and Hayato Ida, Ibaraki (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 6, 2021, as Appl. No. 17/457,822.
Claims priority of application No. 2020-209734 (JP), filed on Dec. 17, 2020.
Prior Publication US 2022/0197163 A1, Jun. 23, 2022
Int. Cl. G03G 9/097 (2006.01); G03G 9/087 (2006.01)
CPC G03G 9/08755 (2013.01) 14 Claims
OG exemplary drawing
 
1. A toner, comprising:
a toner particle containing a binder resin, a crystalline polyester, and a calcium carbonate particle;
the crystalline polyester including a unit derived from an aliphatic diol and a unit derived from an aliphatic dicarboxylic acid, wherein
an ester group concentration Ec of the crystalline polyester is 27 to 50% by mass, and
Ma is 3 to 40% by mass, and Ma/Mc is 5 to 10 when Ma (% by mass) is a content of the calcium carbonate particle included in the toner particle, and Mc (% by mass) is a content of the crystalline polyester included in the toner particle.