Magnetic toner
US7678523B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2008 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Dec 9, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To provide a magnetic toner which has superior low-temperature fixing performance and pressure roller anti-staining properties even in various forms of use, has been kept from image defects such as image non-uniformity even during long-time image reproduction and can achieve high-level image quality. In a magnetic toner having toner particles containing at least a binder resin and a magnetic material, the activation energy Ea (kJ/mol) that is determined from a shift factor aT120 in a master curve of the toner, prepared when 120° C. is set as reference temperature, and the activation energy Eb (kJ/mol) that is determined from a shift factor aT150 in a master curve of the toner, prepared when 150° C. is set as reference temperature, satisfy Expression (1), and the Ea is 110 kJ/mol or less:1.00≦Ea/Eb<1.20 (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.