Toner, method for producing the same, and image forming apparatus
US8852836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2012 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Aug 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09791
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner including: a base resin; and charge-controlling resin particles contained in the base resin, wherein the toner is in shape of particles, and the charge-controlling resin particles are present in a region of each toner particle which is 500 nm in depth from a surface of the toner particle and an average of amounts of the charge-controlling resin particles present in the regions of the toner particles is 20% by volume to 70% by volume, wherein an average of embedment rates of the charge-controlling resin particles in the toner particles is 90% or higher, where each embedment rate is an average of embedment rates of the charge-controlling resin particles in each toner particle, and wherein the charge-controlling resin particles have a charge amount of 60 μC/m2 or more as measured by a blow-off method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.