| 摘要 |
PURPOSE:To provide a surface modified magnetic powder body which is formed by modifying a surface of a magnetic powder body by a polyamide, and a surface modified magnetic powder body which is formed by modifying a surface of a magnetic powder body by a coupling agent and by modifying a surface thereof by polyamide. CONSTITUTION:A modified magnetic powder body forms polyamide on a surface which does not dissolve in solvent which dissolves polyamide. Therefore, when polyamide is used for binder in manufacturing of a resin magnet, ideally high affinity is developed between the both. Therefore, in a synthetic resin magnet wherein polyamide is used for binder, high charging rate, that is, high magnetic force becomes possible. Furthermore, a magnetic powder-polyamide integral molding can be readily acquired, which is effective as a material especially for acquiring a synthetic resin magnet. |
