Toner for developing electrostatic images, method of producing toner for developing electrostatic images, electrostatic image developer
US6022662A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1998 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Apr 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0819
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is toner for developing an electrostatic image, which toner has a volume average particle size distribution index (GSDv) of 1.3 or less, and a ratio of the volume average particle size distribution index (GSDv) to a number average particle size distribution index (GSDp), i.e., (GSDv/GSDp), of 0.95 or more. A method suited for producing the toner for developing an electrostatic image comprises the steps of producing a dispersion liquid of flocculated particles by forming the flocculated particles in a dispersion liquid containing at least resin particles dispersed therein, forming adhered particles by admixing a liquid dispersion comprising fine particles dispersed therein with the dispersion liquid comprising the flocculated particles so that the fine particles adhere to the flocculated particles, and forming toner particles by fusing the adhered particles upon heating. This method for producing the toner for developing an electrostatic image provides the toner excellent in chargeability and having a long life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.