| 摘要 |
PURPOSE:To enhance compatibility with a resin, conveyability in a developing device, and durability, by incorporating delta-FeOOH in a toner used for developing an electric or magnetic latent image. CONSTITUTION:The toner contains at least delta-FeOOH as a ferromagnetic fine powder. This delta-FeOOH is a ferromagnetic fine powder having ferrimagnetism, and has a crystal form of a hexagonal flat plate. It is formed by rapidly oxidizing iron (II) hydroxide with hydrogen peroxide. When it is used as a ferromagnetic fine powder for manufacture of a one-component type toner, it can be used by mixing it with conventional magnetite or ferrite preferably by >=5% delta-FeOOH. It can be used in 0.1-1mum average particle diameter. It has high compatibility with resins, when it is mixed with other ferromagnetic fine powder, it serves as a dispersion aid, and it can enhance durability of the toner. |
