Electrostatic-image developing toner, electrostatic-image developer, toner cartridge, process cartridge, image forming apparatus, and image forming method
US11048183B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2020 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Feb 4, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G21/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic-image developing toner includes toner particles, aggregated silica particles A treated with an oil, and aggregated or non-aggregated silica particles B rendered hydrophobic with a hydrophobizing agent other than an oil. The average particle size Da of the aggregated silica particles A and the average particle size Db of the silica particles B satisfy Da≥Db. The electrostatic-image developing toner does not include any external additive other than the aggregated silica particles A or the silica particles B, or the electrostatic-image developing toner includes an external additive other than the aggregated silica particles A or the silica particles B, the other external additive having an average particle size smaller than the average particle size Da.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.