Toner using small-particle size magnetic iron oxide
US9703216B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2014 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Jul 8, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0838
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a magnetic toner which exhibits a high degree of blackness and high tinting strength, and in which scraping of a toner carrying member surface by the magnetic toner is not caused, and image defects such as fogging and tailing are suppressed. A magnetic toner comprising a magnetic toner particle that contains a binder resin and a magnetic iron oxide particle, wherein, the number-average particle diameter of the magnetic iron oxide particle ranges from 0.05 μm to 0.15 μm, and a relationship between the number-average particle diameter (μm) of the magnetic iron oxide particle and the specific surface area (m2/g) of the magnetic iron oxide particle satisfies Expression (1) below.[Number−average particle diameter]×[specific surface area]≦1.10 (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.