US 12,420,532 B2
Electrophotographic member and electrophotographic image forming apparatus
Atsushi Hori, Chiba (JP); Haruki Mori, Chiba (JP); Shota Inoue, Ibaraki (JP); Kaoru Okamoto, Chiba (JP); Masayuki Onuma, Chiba (JP); Yusuke Baba, Kanagawa (JP); and Takeshi Suzuki, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Feb. 22, 2024, as Appl. No. 18/584,040.
Claims priority of application No. 2023-032913 (JP), filed on Mar. 3, 2023.
Prior Publication US 2024/0302770 A1, Sep. 12, 2024
Int. Cl. B32B 25/20 (2006.01); B32B 7/02 (2019.01); B32B 25/04 (2006.01); B32B 25/14 (2006.01)
CPC B32B 25/20 (2013.01) [B32B 7/02 (2013.01); B32B 25/042 (2013.01); B32B 25/14 (2013.01); B32B 2250/03 (2013.01); B32B 2250/248 (2013.01); B32B 2307/536 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electrophotographic member comprising:
a base material;
an elastic layer on the base material; and
a surface layer on the elastic layer, wherein
the elastic layer comprises silicone rubber,
the surface layer comprises fluoro rubber,
a thickness of the surface layer is 3 μm or more,
an elastic deformation power ηIT calculated from a load displacement curve, obtained with a nanoindentation test according to ISO 14577 by bringing a Vickers indenter into contact with an outer surface of the surface layer and setting a test load at 120 μN, is 30 to 50%, and
a Martens hardness determined by the nanoindentation test at the outer surface of the surface layer is 12.0 to 18.0 N/mm2.