RESIN MAGNET MATERIAL

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PROBLEM TO BE SOLVED : To provide a resin magnet material which prevents rust in a formed product, also prevents a crack and stable in a dimensional profile at the time of an extrusion. SOLUTION : In the resin magnet material for the extrusion forming of a mixture containing mainly a ferromagnetic material powder and a resin binder. The maximum melting torque at a labolatory plastomill test (a usage consisting of 92% of a mixer capacity, 180°C of the resin temperature, a rotation 60 rpm) for a mixture which contains an isotropic spherical NdFeB rare earth magnetic powder having a mean particle diameter of 25 to 65 μm and an ethylene ethyl acrylate resin is ranging from 330 kg×cm to 430 kg×cm and for the torque after 10 minutes from 260 kg×cm to 320 kg×cm. COPYRIGHT : (C)2006, JPO&NCIPI