To provide a sound absorbing material having excellent sound absorbing properties from a low frequency region to a high frequency region and also having excellent morphological retention.SOLUTION: In a sound absorbing material having a multilayer structure, a layer A containing short fibers a having a single fiber diameter of 10.0 μm or less and a layer B containing short fibers b having a single fiber diameter larger than the short fibers a are included.SELECTED DRAWING: None
【課題】低周波数領域から高周波数領域まで優れた吸音性を有し、形態保持性にも優れた吸音材を提供する。【解決手段】多層構造を有する吸音材において、単繊維径が10.0μm以下の短繊維aを含む層Aと、単繊維径が前記短繊維aよりも大きい短繊維bを含む層Bとを含ませる。【選択図】なし
SOUND ABSORBING MATERIAL
吸音材
2021-08-05
Patent
Electronic Resource
Japanese
IPC: | G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / 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 / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
European Patent Office | 2018
|SOUND-ABSORBING OUTER COVERING MATERIAL AND SOUND-ABSORBING MATERIAL
European Patent Office | 2018
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