To provide a novel sound absorption material which can exhibit an excellent sound absorption characteristic even if the material is thin.SOLUTION: A sound absorption material includes: a perforated layer composed of an impermeable material; and a porous layer composed of a permeable material. The perforated layer includes a base having a plurality of pores. The perforated layer includes a composite material including rubber, a nonwoven fabric or foam. Rubber includes at least one selected from a group consisting of polyurethane rubber (PU), silicone rubber, natural rubber (NR), butyl rubber, styrene butadiene rubber (SBR), chloroprene rubber (CR), acrylonitrile butadiene rubber (NBR), ethylene propylene diene rubber (EPDM) and fluororubber (FKM). When a porous layer side is disposed toward an object member, a Helmholtz resonance box structure which resonates with sound incident from the pores is formed.SELECTED DRAWING: Figure 1

    【課題】薄厚であっても優れた吸音特性を発現することができる、新たな吸音材を提供すること。【解決手段】非通気性の材料から構成される多孔層と、通気性の材料から構成される多孔質層とを備え、多孔層が、複数の孔を有する基部を備え、多孔層が、ゴムと不織布又は発泡フォームとを含む複合材を含み、ゴムが、ウレタンゴム(PU)、シリコーンゴム、天然ゴム(NR)、ブチルゴム、スチレンブタジエンゴム(SBR)、クロロプレンゴム(CR)、アクリロニトリルブタジエンゴム(NBR)、エチレンプロピレンジエンゴム(EPDM)及びフッ素ゴム(FKM)からなる群より選択される少なくとも一種を含み、多孔質層側を対象部材に向けて配置した時に、孔から入射する音に共鳴するヘルムホルツ共鳴箱構造が形成される、吸音材。【選択図】図1


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    Title :

    SOUND ABSORPTION MATERIAL AND VEHICLE MEMBER


    Additional title:

    吸音材及び車両部材


    Contributors:

    Publication date :

    2023-10-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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