| 摘要 |
<p>PURPOSE:To obtain a magnetic material dispersion type carrier with improved anti-spent property and shock resistance, and further improved magnetic brush into higher density, showing little deterioration of toner with which high picture quality is stably obtd. for a long time. CONSTITUTION:This carrier has a core material in which magnetic fine particles are dispersed in a binder resin and this core material is coated with resin coating layer. The magnetic fine particles contain strontium ferrite, barium ferrite or lead ferrite. These ferrites may contain the elements of groups IA, IIA, IIIA, IVA, VA, VIA, IB IIB, IVB, VB, VIB, VIIB, VIII in the periodical table and other elements by <1wt.%. The magnetic particles has >=300 Gauss coercive force in 10kOe magnetic field. The resin coating layer contains a graft-modified polyamide resin.</p> |
