Toner and two-component developer
US8288069B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2010 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Nov 5, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/107
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is a toner including: toner particles each containing at least a binder resin and a wax; and an external additive, in which surfaces of the toner particles have an average surface roughness (Ra) measured with a scanning probe microscope of 1.0 nm or more and 30.0 nm or less; and the toner has a surface tension index I for a 45-vol % aqueous solution of methanol measured by a capillary suction time method and calculated from the following equation (1) of 5.0×10−3 N/m or more and 1.0×10−1 N/m or less:I=Pα/(A×B×106) Eq. (1)where I represents the surface tension index (N/m) of the toner, Pα represents a capillary pressure (N/m2) of the toner for the 45-vol % aqueous solution of methanol, A represents a specific surface area (m2/g) of the toner, and B represents a true density (g/cm3) of the toner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.