发明名称 |
DEVELOPING ROLLER, DEVELOPING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS |
摘要 |
A developing roller, including: a shaft containing a metal; an elastic layer on a circumference of the shaft; and a surface layer on a circumferential surface of the elastic layer, wherein the surface layer contains: a polyurethane which is a reaction product between a fluoroethylene vinyl ether copolymer and an isocyanurate form of an isocyanate; and particles having an average primary particle diameter of 5 nm to 30 nm, and wherein the polyurethane has a peak intensity ratio of a NCO group to a hydroxyl group of 5.6 to 8.8 in an infrared absorption spectrum obtained by an attenuated total reflection method. |
申请公布号 |
EP2796934(B1) |
申请公布日期 |
2016.05.18 |
申请号 |
EP20140165861 |
申请日期 |
2014.04.24 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
YASUNAGA, HIDEAKI;JURI, KEIICHIRO;TAKEUCHI, YUTA;NOKAKI, TSUYOSHI;ISHIKAWA, YOSHIMICHI;MIKI, TOMOHARU |
分类号 |
G03G21/18;G03G15/08 |
主分类号 |
G03G21/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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