Reversibly allochroic toner, method of producing the same, toner cartridge, and image forming apparatus
US9519236B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2014 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Aug 20, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1136
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reversibly allochroic toner contains a binder resin and a colorant. The colorant reversibly switches between first and second color states in response to temperature changes. The colorant exhibits a hysteresis in a temperature-color state curve thereof in which the following relationships are satisfied.Tr<TL2<TL1<TH1<TH2<TgTH2≦50° C.20° C.≦Tr≦30° C.where, TH1 is a temperature at which the colorant starts to change from the first color state to the second color state, TH2 is a temperature at which the colorant completely changes to the second color state, TL1 is a temperature at which the colorant starts to change from the second color state to the first color state, TL2 is a temperature at which the colorant completely changes to the first color state, and Tg is a glass transition temperature of the binder resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.