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2. 发明专利

JP4188570B2 Electrophotographic developer, image forming method and image forming apparatus 有权
标题翻译：空值
公开(公告)号：JP4188570B2
公开(公告)日：2008-11-26
申请号：JP2001086168
申请日：2001-03-23
申请人：株式会社リコー
发明人：光輝加藤 , 昭宏小番 , 昌秀山下 , 陽一郎渡辺 , 豊志澤田 , 桂子白石 , 正則鈴木
IPC分类号： G03G9/08 , G03G9/113 , G03G15/08 , G03G21/10
摘要： PROBLEM TO BE SOLVED: To provide electrophotographic developer that substantially prevents a change in developer characteristic with time, retains a high quality image for a very long period of time, is capable of fixing with low fixing energy, retains a high quality image even in use of toner capable of being fixed with saved energy and has a very high function. SOLUTION: The electrophotographic developer comprises a mixture of toner and carrier. The toner is formed by adding two or more kinds of fine particles to a host toner particle composed of at least a coloring agent and a binding resin. In the added fine particles of the toner, the average primary particle diameter of the fine particles, which have the smallest average primary fine particle diameter, is 5 to 50 nm. The carrier particle is obtained in such a manner that a coat layer containing a resin layer is formed on the surface of a core material composed of at least a magnetic substance. The area where a height difference between an arbitrary projection and its adjacent recess of the surface of the carrier particle is 5 nm or less occupies 60% or more of the surface of the carrier particle.
摘要翻译：要解决的问题：为了提供基本上防止显影剂特性随时间变化的电子照相显影剂，可以在很长一段时间内保持高质量的图像，能够以低定影能力固定，即使在使用中也能保持高质量的图像的能够以节省能量固定的调色剂，并且具有非常高的功能。解决方案：电子照相显影剂包括调色剂和载体的混合物。通过将至少由着色剂和粘合树脂构成的主体调色剂颗粒中添加2种以上的微粒而形成调色剂。在添加的调色剂微粒中，平均初级细粒径最小的微粒的平均一次粒径为5〜50nm。以在至少由磁性物质构成的芯材的表面上形成含有树脂层的涂层的方式得到载体颗粒。任意突起与载体颗粒表面的相邻凹部之间的高度差为5nm以下的区域占载体颗粒表面的60％以上。

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