Member for electrophotography, process cartridge, and electrophotographic image forming apparatus
US9482986B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2016 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Feb 17, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0808
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a member for electrophotography that can achieve both an improvement in toner-conveying force under high temperature and high humidity, and excellent charge-providing performance for a toner, at high levels. The member for electrophotography includes a substrate, an electro-conductive elastic layer on the substrate, and a plurality of electrically insulating domains formed in a partial region on the electro-conductive elastic layer. The electro-conductive elastic layer has a Martens hardness of 0.10 N/mm2 or more and 3.00 N/mm2 or less. In the surface of the member for electrophotography, the exposure ratio of the electro-conductive elastic layer per the area of a square 300 μm on a side is 50% to 90%, and the average of the areas of the portions of the respective plurality of electrically insulating domains to be brought into contact with the electro-conductive elastic layer is 300 μm2 or more and 10,000 μm2 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.