Toner for developing electrostatic charge image, electrostatic charge image developer, and toner cartridge
US10935900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2019 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Aug 6, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09733
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing an electrostatic charge image includes toner particles containing a binder resin; and an external additive containing silica particles, in which a coefficient of variation of a Si content is determined by determining the Si content in 0.5 μm×0.5 μm square regions in a surface of each of the toner particles after performing a process of dispersing the toner in water and drying the dispersed toner, and an amount of change between this coefficient of variation of the Si content and a coefficient of variation of a Si content before the process ((coefficient of variation of Si content after process)−(coefficient of variation of Si content before process)) is 0.05 or more and 0.60 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.