To provide: a soundproof body that has a two-layer laminate structure of at least a polyurethane foam layer and a non-breathable layer, and that demonstrates good soundproof performance for noise that has a frequency common to the multiple different thickness portions that make up the two-layer laminated structure within a wide frequency band, by demonstrating good sound insulation performance for each of the thicknesses portions; a manufacturing method of the soundproof body; and silencers for automobiles.SOLUTION: A soundproof body is formed by a two-layer laminate structure of a polyurethane foam layer 60 and a film layer 70. The polyurethane foam layer 60 is formed with multiple different thickness portions, and the multiple different thickness portions have a volume density within a range that can demonstrate good sound insulation performance over predetermined multiple different thickness portions.SELECTED DRAWING: Figure 4

    【課題】本発明は、少なくとも発泡ポリウレタン層と非通気層との2層積層構造を有して、広い周波数帯域以内にて当該2層積層構造を構成する複数の異なる厚さ部位にとって共通な周波数を有する騒音に対し、当該各厚さ部位が共に良好な遮音性能を発揮することで、良好な防音性能を発揮するようにした防音体、その製造方法及び自動車用サイレンサーを提供することを目的とする。【解決手段】防音体は、発泡ポリウレタン層60とフィルム層70との2層積層構成でもって形成されている。発泡ポリウレタン層60は複数の異なる厚さ部位でもって形成されており、当該複数の異なる厚さ部位は、共に、所定の複数の異なる厚さ部位に亘り良好な遮音性能を発揮し得る範囲以内の体積密度を有する。【選択図】図4


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    Title :

    SOUNDPROOF BODY, MANUFACTURING METHOD THEREOF AND SILENCER FOR AUTOMOBILES


    Additional title:

    防音体、その製造方法及び自動車用サイレンサー


    Contributors:
    UEDA KOSUKE (author) / KATO DAISUKE (author)

    Publication date :

    2024-11-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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