Magnetic carrier, two-component developer, and replenishment developer
A magnetic carrier with a resin coating layer of specific silicon distribution and thickness addresses long-term stability issues in electrophotographic image forming, enhancing image density and reducing fogging and toner scattering.
JP7804452B2Active Publication Date: 2026-01-22CANON KK
Patent Information
- Application Number
- JP2021206050
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2021-01-28
- Filing Date
- 2021-12-20
- Publication Date
- 2026-01-22
- Estimated Expiration
- 2041-12-20
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Abstract
To provide a carrier which can obtain the high stability to the image density and developability in a long-term use and is excellent in suppression of fogging and toner scattering.SOLUTION: A magnetic carrier includes: a magnetic core; and a coating resin that coats a surface of the magnetic core, wherein the resin coating layer has a thickness of 50 nm or more, a coating resin, which forms the resin coating layer, contains a resin S having an organosilicon polymer moiety, and when a surface and a position at a depth of 20 nm from the surface of the magnetic carrier are analyzed by X-ray photoelectron spectroscopy, an amount of silicon element as determined by the analysis has a ratio within a specific range at respective positions.SELECTED DRAWING: None
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Citation Information
Patent Citations
Magnetic material dispersion type resin carrier, two- component developer and method for forming image
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