US 12,306,576 B2
Electroconductive member, process cartridge, and device for forming electrophotographic image
Shota Segawa, Shizuoka (JP); Hirobumi Takahashi, Shizuoka (JP); Yasuhiro Fushimoto, Kanagawa (JP); and Syoji Inoue, Shizuoka (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 22, 2022, as Appl. No. 17/655,870.
Application 17/655,870 is a continuation of application No. PCT/JP2020/039033, filed on Oct. 16, 2020.
Claims priority of application No. 2019-191552 (JP), filed on Oct. 18, 2019.
Prior Publication US 2022/0229376 A1, Jul. 21, 2022
Int. Cl. G03G 5/10 (2006.01); C08K 3/04 (2006.01); C08K 3/22 (2006.01); C08K 5/098 (2006.01); C08L 9/06 (2006.01); G03G 15/00 (2006.01)
CPC G03G 5/104 (2013.01) [C08K 3/04 (2013.01); C08K 3/22 (2013.01); C08K 5/098 (2013.01); C08L 9/06 (2013.01); G03G 15/751 (2013.01); C08K 2003/2296 (2013.01); C08K 2201/001 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electrophotographic electroconductive member, comprising:
a support having an electroconductive outer surface; and
an electroconductive layer on the outer surface of the support;
the electroconductive layer comprising a matrix containing a crosslinked product of a first rubber, and domains dispersed in the matrix;
the domains each comprising a crosslinked product of a second rubber, and electroconductive particles;
the matrix having a volume resistivity R1 of more than 1.0×1012 Ω·cm, and the domains each having a volume resistivity R2 lower than the volume resistivity R1 of the matrix, wherein
the electroconductive layer further comprises a pore, an inner wall of the pore being constituted by a part of the matrix and a part of the domains, and
the domains constituting the inner wall protrude into the pore at sites on the inner wall.