Toner, developer, toner container, process cartridge, and an image forming apparatus
US7413839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2005 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | May 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The object of the present invention is to provide a toner characterized in that the toner comprises a first binder resin and a second binder resin, the first binder resin is an amorphous resin and the second binder resin is a crystalline resin, and the glass-transition temperature of the toner (TgA) is lower than the glass-transition temperature expressed by the following equation (1) (TgC).In the above equation (1), “TgBi” represents the glass-transition temperature of the amorphous resin, “n” represents the number of amorphous resins, and “b” represents the content of the amorphous resin (part by mass). Examples of the preferred aspect of the present invention includes the one that at least a part of the amorphous resin and a part of the crystalline resin are compatible each other, and the one that the glass-transition temperature of the toner (TgA) is 10° C. or more lower than the glass-transition temperature (TgC).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.