Electrostatic charge image developing toner, electrostatic charge image developer, and toner cartridge
US9910372B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2016 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | Oct 27, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0865
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic charge image developing toner includes: toner particles; first silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%; and second silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%, wherein, when an average primary particle diameter of the first silica particles is set as Da (nm) and an average primary particle diameter of the second silica particles is set as Db (nm), relationships of the following Expressions (A1) to (A3) are satisfied: Expression (A1): 80≦Da≦120, Expression (A2): 120≦Db≦200, and Expression (A3): 10≦Db−Da≦120.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.