Magnetic toner
US7935467B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2008 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Dec 1, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a magnetic toner which has magnetic toner base particles containing at least a binder resin and a magnetic material, and an inorganic fine powder, (i) the magnetic toner has an average circularity of from 0.950 or more to 1.000 or less, (ii) the magnetic toner has a compressibility of 30 or less, and (iii) the magnetic toner contains boron nitride particles having a median diameter (D50) of from 0.5 μm or more to 8.0 μm or less, as the inorganic fine powder in an amount of from 0.05 part by mass or more to 1.00 part by mass or less based on 100 parts by mass of the magnetic toner base particles. This provides a magnetic toner with which stable image density can be achieved without regard to service environment and which do not cause any image defects such as fog.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.