| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a carrier which possesses a multiplicity of performance including a flow property in order to solve the problems with the conventional dry process two-component based developing resin coated carriers that the carriers lack above all in the flow property in the required performance and consequently the long-term stability of the resultant images do not heretofore exist at a satisfactory level. SOLUTION: The coating resin layers of the dry process two-component based developing resin coated carrier formed by the coating resin layers on the surfaces of core materials contain a fluororesin, a binder resin and dispersed silica particles of 80 to 230 m2/g in BET specific surface area and 10 to 20 nm in average grain size of their primary particles. The flow property and spent resistance are improved by the silica particles having such specific surface area and specific grain size and the grade of the images may be maintained high for a long period.</p> |
