Toner for electrophotography
US8546054B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2008 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | May 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0604
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic toner includes a binder resin, a colorant, and a releasing agent, wherein the electrophotographic toner has a complex viscosity (η) of 4e2 Pa·s to 8e3 Pa·s at a temperature range of 120 to 160° C. and an angular velocity range of 1.6 to 10 rad/s, a rate of change of the complex viscosity of 165 to 185 Pa·s/° C. at 1.6 rad/s, and 70 to 80 Pa·s/° C. at 10 rad/s within the temperature range, a stress relaxation of 1.0 e3 to 4.5 e4 Pa at a relaxation time of 0.05 to 0.3 seconds under a temperature range of 120 to 160° C., and a rate of change of the stress relaxation (ΔG/ΔT) of 785 to 1000 Pa/° C. at 0.05 seconds and 190 to 215 Pa/° C. at 0.3 seconds within the temperature range above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.