US 12,189,335 B2
White toner, electrostatic charge image developer, and toner cartridge
Teppei Yawada, Kanagawa (JP); Asafumi Fujita, Kanagawa (JP); Kotaro Yoshihara, Kanagawa (JP); and Tsuyoshi Murakami, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Feb. 6, 2022, as Appl. No. 17/665,577.
Claims priority of application No. 2021-153563 (JP), filed on Sep. 21, 2021.
Prior Publication US 2023/0092262 A1, Mar. 23, 2023
Int. Cl. G03G 9/08 (2006.01); G03G 9/097 (2006.01); G03G 15/08 (2006.01)
CPC G03G 9/0825 (2013.01) [G03G 9/0819 (2013.01); G03G 9/09708 (2013.01); G03G 9/09733 (2013.01); G03G 15/0865 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A white toner comprising:
a toner particle that contains a binder resin, a release agent, and titanium oxide, at least a part of the titanium oxide being present in a release agent domain,
wherein in observation of a cross section of the toner particle, an average major axis length Dt of the toner particle, an average major axis length Dw of the release agent domain, and an average major axis length Dp of the titanium oxide in the release agent domain satisfy Expressions (1) and (2),
2×Dp≤Dw≤10×Dp, and  Expression (1):
0.1×Dt≤Dw≤0.5×Dt  Expression (2).