| 摘要 |
PURPOSE:To improve an orientation degree of ferromagnetic powder by blending polyamid resin with phenol resin and mixing and kneading them with ferromagnetic powder to be molded in a magnetic field while lowering melting viscosity of a molding material. CONSTITUTION:Polyamid resin and ferromagnetic powder are mixed and kneaded to obtain a molding material for a resin magnet. The polyamid resin is blended with a phenol resin. The polyamid resin can be pellet shaped. However, it is desirable to be powder-shaped in consideration of uniformity of dispersion, or the like. The ferromagnetic powder is of hard ferrite, such as barium ferrite and strontium ferrite, and rare earth cobalt magnetic power, such as samarium and cobalt. Thereby, melting viscosity of the molding material at the time of molding in a magnetic field is lowered and the orientation degree of the ferromagnetic powder is improved. |
