US 12,298,711 B2
Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, and image forming apparatus
Shinya Sakamoto, Kanagawa (JP); Daisuke Ishizuka, Kanagawa (JP); Keita Yamamoto, Kanagawa (JP); and Eiji Kawakami, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Mar. 28, 2022, as Appl. No. 17/705,721.
Claims priority of application No. 2021-157173 (JP), filed on Sep. 27, 2021.
Prior Publication US 2023/0095496 A1, Mar. 30, 2023
Int. Cl. G03G 9/087 (2006.01)
CPC G03G 9/08786 (2013.01) [G03G 9/08704 (2013.01); G03G 9/08711 (2013.01); G03G 9/08755 (2013.01); G03G 9/08797 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A toner for developing an electrostatic charge image, the toner comprising:
toner particles that contain binder resins including an amorphous polyester resin and a crystalline polyester resin, an ester-based release agent, and a polycondensate of a styrene-acrylic resin and a polyolefin resin, wherein:
the toner particles have a storage modulus G′T (70) at 70° C. of 1×104 Pa or more and 1×106 Pa or less and a storage modulus G′T (90) at 90° C. of 1×103 Pa or more and 1×105 Pa or less in dynamic rheometry; and
the polycondensate of styrene-acrylic and polyolefin resins has a storage modulus G′SP (70) at 70° C. of 1×104 Pa or more and 1×107 Pa or less and a storage modulus G′SP (90) at 90° C. of 1×103 Pa or more and 1×106 Pa or less in dynamic rheometry.