US 12,169,389 B2
Photoluminescent toner, electrostatic charge image developer, and toner cartridge
Kotaro Yoshihara, Kanagawa (JP); Tsuyoshi Murakami, Kanagawa (JP); Asafumi Fujita, Kanagawa (JP); and Teppei Yawada, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Jan. 28, 2022, as Appl. No. 17/586,790.
Claims priority of application No. 2021-153562 (JP), filed on Sep. 21, 2021.
Prior Publication US 2023/0090120 A1, Mar. 23, 2023
Int. Cl. G03G 9/097 (2006.01); G03G 9/08 (2006.01); G03G 15/08 (2006.01)
CPC G03G 9/09716 (2013.01) [G03G 9/0819 (2013.01); G03G 9/0821 (2013.01); G03G 9/09725 (2013.01); G03G 15/0865 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A photoluminescent toner comprising:
a photoluminescent toner particle that contains a binder resin, a release agent, and a photoluminescent pigment and has a release agent domain; and
a silicone oil-treated silica particle that is externally added to the photoluminescent toner particle,
wherein in observation of a cross section of the photoluminescent toner particle, an average major axis length Dw of the release agent domain and an average major axis length Dp of the photoluminescent pigment satisfy Expression (1),
0.3≤Dw/Dp≤1.0.  Expression (1):