Invention Grant
- Patent Title: Electro-conductive member, manufacturing method thereof, process cartridge, and electrophotographic image forming apparatus
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Application No.: US17658755Application Date: 2022-04-11
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Publication No.: US11619890B2Publication Date: 2023-04-04
- Inventor: Atsushi Uematsu , Takumi Furukawa , Takashi Hiramatsu
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Venable LLP
- Priority: JPJP2019-191553 20191018
- Main IPC: G03G15/02
- IPC: G03G15/02

Abstract:
The electro-conductive member has an electro-conductive support, and an electro-conductive layer, in which the electro-conductive layer has a matrix including a first rubber cross-linked product and domains dispersed in the matrix, each of the domains includes a second rubber cross-linked product and electro-conductive particles, an outer surface of the electro-conductive member has concave portions, a surface of at least a part of the domains is exposed to the outer surface of the electro-conductive member at bottom portions of the concave portions, a volume resistivity of the matrix is greater than 1×1012 Ωcm, a volume resistivity of the electro-conductive layer is 1×105 Ωcm to 1×108 Ωcm, and A2 is 20 times or more of A1.
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