PROBLEM TO BE SOLVED: To provide a vehicular sound absorbing material that has shape retention properties and maintains the soundproof performance.SOLUTION: The present invention provides a vehicular sound absorbing material made of resin and having a non-through hole, where the non-through hole has a Helmholtz resonance structure comprising an introduction passage that opens on the surface and a hollow part connected to outside through the introduction passage. The resin has a 50% deformation compression stress σ, measured in accordance with JIS K 7220 (2006), of 100-1000 kPa.SELECTED DRAWING: Figure 1
【課題】 形状保持性があり、防音性能が維持される車両用吸音材を提供すること。【解決手段】 非貫通孔を有する樹脂製の車両用吸音材であって、上記非貫通孔は、表面に開口する導入通路と上記導入通路を介して外部と接続される中空部からなるヘルムホルツ共鳴構造を有しており、上記樹脂のJIS K 7220(2006)に準拠して測定される50%変形圧縮応力σ50が100〜1000kPaであることを特徴とする車両吸音材。【選択図】 図1
VEHICULAR SOUND ABSORBING MATERIAL, VEHICULAR COMPONENT, AUTOMOBILE, AND PARTITION MEMBER FOR AUTOMOBILE
車両用吸音材、車両用部品、自動車及び自動車用仕切り部材
2018-10-11
Patent
Electronic Resource
Japanese
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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 |
SOUND ABSORBING MEMBER, VEHICLE COMPONENT, AND AUTOMOBILE
European Patent Office | 2019
|VEHICULAR INTERIOR PART INCLUDING SOUND ABSORBING MEMBER
European Patent Office | 2019
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