Toner, toner stored unit, and image forming apparatus
US10451989B2 · kind B2 · utility
0Cited by
3References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Aug 31, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0865
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a toner including toner base particles and an external additive, wherein each of the toner base particles includes a binder resin, a release agent, and silica, an average abundance ratio (Xsurf) of the silica on a region adjacent to a surface of the toner base particle is from 70% through 90%, and a projected area average value S(180) per particle of the toner when the toner is heated to 180° C. and a projected area average value S(30) per particle of the toner when the toner is 30° C. satisfy Formula (1) below, 1.4≤S(180)/S(30)≤1.7 Formula (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.