Method for producing toner for developing images of electrostatic charge, toner for developing images of electrostatic charge, developer for images of electrostatic charge and method for forming images
US5910389A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Nov 3, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
According to the present invention, the method for producing toner for developing an image of electrostatic charge comprises the steps of producing a dispersion liquid of flocculated particles by forming the flocculated particles in a dispersion liquid comprising at least dispersed resin particles, forming combined particles by dispersing a liquid dispersion comprising dispersed fine resin particles into the dispersion liquid of flocculated particles so that the fine resin particles adhere to the flocculated particles and forming toner particles by fusing the combined particles by heating, wherein the molecular weight distribution curve of the resin in the toner particles by a gel permeation chromatography has at least two peaks or shoulders. According to the present invention, it is possible to produce toner for developing an image of electrostatic charge which is particularly superior in chargeability and the stability of the chargeability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.