To provide a vehicle soundproof material and a soundproof mechanism, which are light-weight and thin and have high soundproof performance against sound in a frequency band which is particularly problematic in recent vehicles.SOLUTION: A vehicle soundproof material has a configuration in which a polyurethane foam layer 2 and an elastomer layer 3 are laminated. A storage shear elastic modulus G' at a temperature of 25°C and a frequency of 1 Hz to 2,000 Hz is 5.0×103 Pa or more and 1.0×105 Pa or less, and a loss tangent tan δ at a temperature of 25°C and a frequency of 1 Hz to 2,000 Hz is 0.01 or more and 0.3 or less in the polyurethane foam layer 2, and a density of the elastomer layer 3 is 1,000 kg/m3 or more and 2,000 kg/m3 or less, a thickness of the polyurethane foam layer 2 is 15 mm or less, a thickness of the elastomer layer 3 is 3 mm or less. These layers are arranged on a vehicle panel 5 constituting a part of a vehicle body.SELECTED DRAWING: Figure 1

    【課題】軽量かつ薄型であって、近年の自動車において特に問題になる周波数帯の音に対する高い遮音性を有する、自動車用の防音材および防音機構を提供する。【解決手段】自動車用の防音材が、ポリウレタンフォーム層2とエラストマー層3とが積層された構成であり、ポリウレタンフォーム層2の、温度25℃で周波数1Hz~2000Hzにおける貯蔵せん断弾性率G’は5.0×103Pa以上1.0×105Pa以下であり、温度25℃で周波数1Hz~2000Hzにおける損失正接tanδは0.01以上0.3以下であり、エラストマー層3の密度は1000kg/m3以上2000kg/m3以下であり、ポリウレタンフォーム層2の厚さは15mm以下で、エラストマー層3の厚さは3mm以下であり、自動車の車体の一部を構成する車両用パネル5上に配置される。【選択図】図1


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    Title :

    VEHICLE SOUNDPROOF MATERIAL AND SOUNDPROOF MECHANISM


    Additional title:

    自動車用の防音材および防音機構


    Contributors:

    Publication date :

    2023-04-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / 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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