The present invention addresses the problem of providing a sound-absorbing material that has excellent sound absorption in the low-frequency range, the middle-frequency range, the high-frequency range, and the ultra-high-frequency range. A laminate sound-absorbing material that includes a porous layer and a base material layer. The porous layer is a fiber layer or comprises a microporous film. Themean flow pore diameter of the porous layer is 0.1-30 [mu]m. The basis weight of the porous layer is 0.1-200 g/m2. The average sound transmission loss of the base material layer between 1,000 Hz and12,500 Hz is at least 2 dB. The base material layer is arranged on a sound incidence side, and the porous layer is arranged a sound transmission side.
本发明的课题在于提供一种在低频区域、中频区域、高频区域及超高频区域的所有区域中具有优异的吸音性的吸音材料。一种层叠吸音材料,包含多孔质层与基材层,且所述多孔质层是纤维层或包含微多孔膜的层,所述多孔质层的平均流量细孔径为0.1μm~30μm,单位面积重量为0.1g/m2~200g/m2,所述基材层在1000Hz至12500Hz下的平均音响透过损失为2dB以上,所述基材层配置在声音的入射侧,所述多孔质层配置在声音的透过侧。
LAMINATE SOUND-ABSORBING MATERIAL
层叠吸音材料
2020-12-22
Patent
Electronic Resource
Chinese
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 / E04B Allgemeine Baukonstruktionen , GENERAL BUILDING CONSTRUCTIONS |
SOUND WAVES ABSORBING LAMINATE COMPOSITE MATERIAL STRUCTURE
European Patent Office | 2021
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