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AssigneeMiyagawa Kasei Industry Co., Ltd.
InventorsKenichi Noda, Yasumasa Kato, Haruo Kitamura, Masao Ogawa
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An electromagnetic wave absorber is formed by injection-molding a thermoplastic resin blended with approximately 20-60% by volume of soft magnetic material powder, and blended with a molding assistant and a kneading assistant. The electromagnetic wave absorber includes a unit cell having a bore extending from a top face to a bottom face. A portion of the bore located more adjacently to the bottom face than to the top face has a smaller cross-sectional area than the bore at the top face, and a height of the unit cell from the bottom face to the top face is approximately at least 1.2 times and approximately at most 10 times as large as the maximum width of the bore at the top face of the unit cell.
A composite body for absorbing an electromagnetic wave including a thermoplastic resin consisting of at least one of polypropylene and methylpentene polymer blended with 30-58% by volume of soft magnetic material powder having a scale-like shape and an aspect ratio of 3-20 and a mean particle diameter converted to spherical diameter of 5-50 μm, comprising a unit cell having a bore extending from a top face to a bottom face, wherein
A composite body for absorbing an electromagnetic wave comprising a thermoplastic resin blended with 20-60% by volume of soft magnetic material powder, having a bore) extending from a top face to a bottom face, and wall portions surrounding said bore, wherein
A method of manufacturing a composite body for absorbing an electromagnetic wave, comprising the steps of:
Dependencies are inferred from the claim text.