US 11,720,036 B2
Toner
Takakuni Kobori, Ibaraki (JP); Kenta Mitsuiki, Ibaraki (JP); Hitoshi Sano, Chiba (JP); Wakiko Katsumata, Chiba (JP); Daisuke Yamashita, Chiba (JP); Yosuke Iwasaki, Tokyo (JP); Takeshi Ohtsu, Ibaraki (JP); Takaho Shibata, Tokyo (JP); Masaharu Miura, Ibaraki (JP); Koh Ishigami, Chiba (JP); and Yuichi Mizo, Ibaraki (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 10, 2021, as Appl. No. 17/344,544.
Claims priority of application No. 2020-106192 (JP), filed on Jun. 19, 2020.
Prior Publication US 2021/0397106 A1, Dec. 23, 2021
Int. Cl. G03G 9/087 (2006.01); C08F 212/08 (2006.01); G03G 9/08 (2006.01)
CPC G03G 9/08711 (2013.01) [C08F 212/08 (2013.01); G03G 9/0819 (2013.01); G03G 9/08755 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A toner comprising a toner particle, said toner particle comprising:
a binder resin comprising a polyester resin; and
a polyolefin resin having a sulfonic acid group, the polyolefin resin being a polymer in which a vinyl polymer is bonded to a polyolefin; and
a content ratio of a monomer unit containing a sulfonic acid group in the vinyl polymer being 1.0 to 20.0 mass %, wherein
when the toner is divided using an inertial classification system into a first group having a large particle size and a second group having a small particle size so that the number of toner particles in the first and second groups are substantially equal, 1.10≤(As/Bs)/(Al/Bl)≤2.00
where As is a ratio of an intensity of a maximum absorption peak in a range from 1130 to 1170 cm−1 assigned to a sulfonic acid group contained in the polyolefin resin with respect to an intensity of a maximum absorption peak in a range from 1713 to 1723 cm−1 assigned to carbonyl in the polyester resin in a FT-IR spectrum obtained by measuring the second group by an ATR method using Ge as an ATR crystal where an infrared light incidence angle is 45°,
Bs is a ratio of an intensity of a maximum absorption peak in a range from 1130 to 1170 cm−1 assigned to a sulfonic acid group contained in the polyolefin resin with respect to an intensity of a maximum absorption peak in a range from 1713 to 1723 cm−1 assigned to carbonyl in the polyester resin in a FT-IR spectrum obtained by measuring the second group by an ATR method using diamond as an ATR crystal where an infrared light incidence angle is set to 45°,
Al is a ratio of an intensity of a maximum absorption peak in a range from 1130 to 1170 cm−1 assigned to a sulfonic acid group contained in the polyolefin resin with respect to an intensity of a maximum absorption peak in a range from 1713 to 1723 cm−1 assigned to carbonyl in the polyester resin in a FT-IR spectrum obtained by measuring the first group by an ATR method using Ge as an ATR crystal where an infrared light incidence angle is set to 45°, and
Bl is a ratio of an intensity of a maximum absorption peak in a range from 1130 to 1170 cm−1 assigned to a sulfonic acid group contained in the polyolefin resin with respect to an intensity of a maximum absorption peak in a range from 1713 to 1723 cm−1 assigned to carbonyl in the polyester resin in a FT-IR spectrum obtained by measuring the first group in accordance with an ATR method using diamond as an ATR crystal where an infrared light incidence angle is set to 45°; and
the toner has a span value of 1.1 to 2.0 defined as (D90−D10)/D50
when D90 is a particle diameter of the toner at which a cumulative number of particles in increasing order of particle diameter is 90%, D10 is a particle diameter of the toner at which a cumulative number of particles in increasing order of particle diameter is 10%, and a number-basis median diameter D50 of the toner is 3.0 to 6.0 um.