Toner
US9128400B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2011 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Dec 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09783
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
To provide a toner that can keep its melt-sticking to sleeve from occurring and, even in double-sided printing, can keep high-temperature offset from occurring and obtain high-quality images on both the surface and the back. The toner comprises toner particles each of which contains a binder resin containing a resin formed by the reaction of i) a resin (A) having a softening point TA (° C.) of 70° C. to 105° C. and having a peak top of endothermic peaks at 55° C. to 120° C. with ii) a resin (B) having a softening point TB (° C.) of 120° C. to 160° C. and having a peak top of endothermic peaks at 55° C. to 120° C., and, in its viscoelasticity characteristics, has a storage elastic modulus at temperature 180° C. (G′180) of 3.0×103 Pa to 3.0×104 Pa, where the loss tangent tan δ has at least one peak having a peak top within the range of 50° C. to 70° C. and, when peak top temperature of the peak is represented by T(° C.), the loss tangent at T+10(° C.) [tan δ(T+10)] is 1.0 to 1.5 and the ratio of tan δ(T+10)/tan δ(110) is 0.8 to 1.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.