Method for manufacturing toner, toner and image forming method
US9176402B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2012 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Sep 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for manufacturing a toner, including at least: dissolving or dispersing a toner material including at least any one of a binder resin and a precursor of a binder resin in an organic solvent which is dispersed in a dispersant-including aqueous medium; forming particles by removing the organic solvent; washing the particles; forming voids in the particles by heating to a temperature T while or after dispersing the particles in an aqueous medium; forming toner base particles by adding a charge controlling agent; and adding an external additive to the toner base particles to obtain toner particles, wherein the T is between a glass transition temperature Tg of the toner particles and Tg+25° C., and the toner has a cross-sectional void fraction Sp/St of 0.1% to 15.0%, where St is a cross-sectional area of the toner particles, and Sp is a cross-sectional area of the voids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.