| 摘要 |
PURPOSE:To enhance fixability and stability of an electrographic toner by forming a coating layer made of a resin having >=50 deg.C glass transition temp. on the surface of the toner having at least one component resin having <=20 deg.C glass transition temp. CONSTITUTION:An electrophotographic toner is composed of a toner material being a core part and a coating layer covering the surface. The resin used for this toner material is a PE resin, etc. having <=20 deg.C glass transition temp. for enabling pressure fixing, that is, high ductility and malleability. The coating resin to be used as a resin, such as acrylic or styrene resin, having >=50 deg.C glass transition temp. This coating resin insulates the toner material from the exterior by coating it at the time except that of fixing, but at the time of fixing, it needs to be broken by a prescribed pressure. Such an electrophotographic toner has fluidity in the core toner material at the fixing temp. but not in the coating layer, and hence, stability and fixability can be enhanced. |
