MOLDING MATERIAL AND MOLDED BODY

To provide a molding material capable of achieving both of high flowability during molding and suppression of bleeding of a resin, and good in magnetic property and less in molding failure.SOLUTION: The molding material 1 has a resin 2, and a magnetic body powder 3 containing an iron-based particle...

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Bibliographische Detailangaben
Hauptverfasser: NISHINO TETSUSHI, YAMASHITA KATSUSHI, OZAKI YUI, YOSHIDA MASATO, HATA YOKO
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a molding material capable of achieving both of high flowability during molding and suppression of bleeding of a resin, and good in magnetic property and less in molding failure.SOLUTION: The molding material 1 has a resin 2, and a magnetic body powder 3 containing an iron-based particle 3a exhibiting soft magnetism, and having percentage content of iron of 85 mass% or more, and a fine particle 3b exhibiting soft magnetism and having particle of 3 μm or less. The iron-based particle and the fine particle have preferably different composition of a constituting material each other. Volume fraction of the fine particle is preferably 3 to 25 vol.% of the iron-based particle. The iron-based particle preferably contains a first particle 31, and a second particle 32 with a composition of the constituting material different from the first particle.SELECTED DRAWING: Figure 1 【課題】成形時の高い流動性と樹脂の染み出しの抑制とを両立させ得る成形材料、および、磁気特性が良好で成形不良の少ない成形体を提供すること。【解決手段】本発明の成形材料1は、樹脂2と、軟磁性を示し鉄の含有率が85質量%以上である鉄基粒子3aと、軟磁性を示し粒径が3μm以下の微小粒子3bと、を含む磁性体粉末3と、を有する。また、前記鉄基粒子および前記微小粒子は、構成材料の組成が互いに異なることが好ましい。また、前記微小粒子の体積分率は、前記鉄基粒子の3〜25体積%であるのが好ましい。また、前記鉄基粒子は、第1粒子31と、構成材料の組成が前記第1粒子とは異なる第2粒子32と、を含むことが好ましい。【選択図】図1