Carrier for electrophotography and developer using the same
US6828075B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 2002 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | May 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1136
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A carrier for electrophotographic developer comprising carrier particles, each carrier particle having at least one surface-coating layer by resin material, wherein the surface-coating layer containing an acrylic resin and a silicone resin, the acrylic resin is in an amount ranging 10 to 90 wt. % based on the total amount of resin coating ingredients. The carrier shows no accumulation of toner-spents, therefore can obtain a stable electric charge, and has no layer scraping in binder resin layer, therefore can obtain a stable electric resistance, hence occurs no deterioration of images reproduced, by using acrylic resin having high anti-abrasive and high surface energy, whereas it has strong adhesiveness and high fragility, in combination use of silicone resin having poor anti-abrasive and small adhesiveness but has low fragility, thus is hard to cause a toner spent and hard to integrate the spent constituents due to its low surface energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.