发明公开
EP1260874A1 Carrier for electrophotography and developer using the same
有权
Trägerteilchenund Entwicklerfürdie Elektrophotographie
- 专利标题: Carrier for electrophotography and developer using the same
- 专利标题(中): Trägerteilchenund Entwicklerfürdie Elektrophotographie
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申请号: EP02011465.8申请日: 2002-05-24
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公开(公告)号: EP1260874A1公开(公告)日: 2002-11-27
- 发明人: Suzuki, Kousuke , Mochizuki, Satoshi , Asahina, Yasuo , Umemura, Kazuhiko , Sugiura, Hideki , Masuda, Minoru , Tamura, Tomomi
- 申请人: Ricoh Company
- 申请人地址: 3-6, Nakamagome 1-chome, Ohta-ku Tokyo 143-8555 JP
- 专利权人: Ricoh Company
- 当前专利权人: Ricoh Company
- 当前专利权人地址: 3-6, Nakamagome 1-chome, Ohta-ku Tokyo 143-8555 JP
- 代理机构: Barz, Peter, Dr.
- 优先权: JP2001156091 20010524; JP2001290267 20010921; JP2002147082 20020522
- 主分类号: G03G9/113
- IPC分类号: G03G9/113
摘要:
A carrier for electrophotographic developer comprising carrier particles, each carrier particle having at least one surface-coating layer of resin material, characterized by the surface-coating layer containing an acrylic resin and a silicone resin, the acrylic resin being in an amount of from 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 with use of a 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.
公开/授权文献
- EP1260874B1 Carrier for electrophotography and developer using the same 公开/授权日:2008-03-26
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