US 12,366,816 B2
Electrophotographic member, process cartridge, and electrophotographic image forming apparatus
Ayumi Sasaki, Shizuoka (JP); and Kazuaki Nagaoka, Shizuoka (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 6, 2023, as Appl. No. 18/329,775.
Claims priority of application No. 2023-087072 (JP), filed on May 26, 2023.
Prior Publication US 2024/0004326 A1, Jan. 4, 2024
Int. Cl. G03G 15/08 (2006.01); G03G 21/18 (2006.01)
CPC G03G 15/0818 (2013.01) [G03G 15/0808 (2013.01); G03G 21/1814 (2013.01); G03G 2215/0861 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electrophotographic member, comprising:
an electroconductive substrate; and
an elastic layer on the substrate, the elastic layer being a single layer and containing a silicone rubber having a dimethylsiloxane structure, wherein
when a side of the elastic layer facing the substrate is defined as a second surface, and a surface of the elastic layer opposite the second surface is defined as a first surface, and a peak top temperature of an ion thermogram is derived from the dimethylsiloxane structure, T1>T2 when T1 (° C.) is an ion thermogram measured from a first sample sampled from a first region having a thickness of 0.5 μm from the first surface toward the second surface, the first sample containing a polymer that is an epoxy resin, and T2 (° C.) is an ion thermogram measured from a second sample sampled from a second region corresponding to a thickness of 1.0 to 1.5 μm from the second surface of the elastic layer toward the first surface, the second sample not containing the polymer, and
when a peak top temperature of an ion thermogram is derived from the polymer, C1>C2 when C1 (° C.) is an ion thermogram measured from the first sample, and C2 (° C.) is an ion thermogram measured from a third sample obtained by decomposing the silicone rubber in the first sample.