| 摘要 |
PURPOSE:To reduce the frictional resistance among ferromagnetic powder and between the ferromagnetic powder and a resin and to improve magnetic characteristics by adding a stearic acid metal salt to a composition wherein the main components are the ferromagnetic powder and a polyamide resin. CONSTITUTION:Ferromagnetic powder wherein the main components are the ferromagnetic powder and one or more polyamide resins selected from nylon-11, nylon-12 or nylon-612 and a stearic acid metal salt is added is orientated. In accordance with the increase of the quantity of the stearic acid metal salt, the contact resistance among the ferromagnetic powder is reduced but conversely, the mechanical strength of a formation is reduced and the formation becomes to be easily cracked so the quantity of the added material is desirable to be 0.1-0.2 weight % of the total quantity.
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