Toner for developing electrostatic latent image, and image forming apparatus and process cartridge using the toner
US8029960B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2008 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Feb 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09725
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner, including a parent particulate material including a colorant and a binder resin, and an external additive including particles having an average primary particle diameter from 80 to less than 150 nm in an amount of from 0.03 to 2% by number, particles having an average primary particle diameter from 5 nm to less than 15 nm in an amount of from 50 to 95% by number, and particles having an average primary particle diameter from 15 to less than 40 nm in an amount of from 5 to 40% by number, and the particles having an average primary particle diameter from 80 to less than 150 nm include particles having an average primary particle diameter not less than 200 nm in an amount of from 10 to 30% by number, and have a weight reduction rate not greater than 3.00% when heated from 30 to 250° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.