Developer carrying member, process cartridge, and electrophotographic apparatus
US10831125B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2020 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Mar 5, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/1814
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The developer carrying member, includes: an electroconductive substrate; and a surface layer containing a resin, on the substrate, in which a thickness of the surface layer is 1.0 μm or more and 100.0 μm or less, a Martens hardness at an indentation depth of 0.1 μm that is measured by infiltrating a Vickers indenter in a thickness direction of the surface layer from an outer surface of the surface layer is 50.0 N/mm2 or more and 100.0 N/mm2 or less, an Asker C hardness that is measured from the outer surface of the surface layer is 75° or more and 90° or less, and a value of a work function of the outer surface of the surface layer is 5.6 eV or more and 6.0 eV or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.