Patent ID: 11971669
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An electrophotographic belt comprising a cylindrical film as a base layer,
the cylindrical film comprising a crystalline polyester, an amorphous polyester and carbon black,
a content of the carbon black in the cylindrical film being 2.0% by mass or more; and
Fc1 being 0.30 or more, and Φc1 being −10° to +10°,
where Fc1 denotes an average degree of arrangement of the carbon black in a circumferential direction observed in a cross section in a direction along the circumferential direction of the cylindrical film, and Φc1 denotes an average arrangement angle of the carbon black in the circumferential direction observed in the cross section in the direction along the circumferential direction of the cylindrical film.