US 10,890,869 B2
Fixing member, heat fixing apparatus, and image forming apparatus
Yasuhiro Miyahara, Tokyo (JP); Naoki Akiyama, Moriya (JP); Hiroto Sugimoto, Toride (JP); Hiroki Muramatsu, Tokyo (JP); Akeshi Asaka, Kashiwa (JP); Noriaki Kobayashi, Toride (JP); Matsutaka Maeda, Kawasaki (JP); and Yuji Kitano, Fujisawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on May 20, 2020, as Appl. No. 16/879,351.
Claims priority of application No. 2019-096549 (JP), filed on May 23, 2019.
Prior Publication US 2020/0371460 A1, Nov. 26, 2020
Int. Cl. G03G 15/20 (2006.01)
CPC G03G 15/2057 (2013.01) [G03G 2215/2016 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electrophotographic fixing member comprising:
a substrate; and
an elastic layer on an outer circumference of the substrate,
the elastic layer containing fillers each of which contains an inorganic oxide, wherein
(1) when a binarized image on a first cross-section in a thickness-circumferential direction of the elastic layer, and a binarized image on a second cross-section in a thickness-axial direction of the elastic layer are obtained, and when a shape of each of the fillers observed in the respective binarized images is approximated to an ellipse,
among the fillers,
an area proportion of a first fillers each having a major axis/minor axis of smaller than 1.5 is represented by A, and
an area proportion of a second fillers each having a major axis/minor axis of 1.5 or larger is represented by B,
A and B satisfy the following relation
1.0≤(A/B)≤2.0 and 0.40≤(A+B)≤0.50 are satisfied; and
(2) an average orientation angle of the second fillers with respect to a thickness direction of the elastic layer is defined as θAve, θAve is 50° or more and 90° or less.