To provide a laminated sound absorbing material having excellent sound absorption properties in a frequency range of 500 to 1000 Hz, which people feel unpleasant, despite small thickness and light weight.SOLUTION: The laminated sound absorbing material comprises at least one layer (A) and at least one layer (B), in which apparent density of the layer (A) is 0.15 to 1.5 g/cm3, air permeability (A1, unit: cm3/cm2/sec) of the layer (A) in accordance with JIS K6400 is 0 to 10 cm3/cm2/sec, total thickness (T1, unit: mm) of the layer (A) is 0.1 to 1.0 mm, the apparent density of the layer (B) is 0.005 to 0.080 g/cm3, the air permeability of the layer (B) in accordance with JIS K6400 is 0.1 to 250 cm3/cm2/sec, and the total thickness of the layer (B) is 10 to 65 mm.SELECTED DRAWING: None

    【課題】本発明厚みが小さく軽量であるにもかかわらず、人が不快に感じる500~1000Hzの周波数領域において優れた吸音性を有する積層吸音材を提供することを目的とする。【解決手段】本発明は、少なくとも1つの層(A)と、少なくとも1つの層(B)と、を含む積層吸音材であり、層(A)の見かけ密度は0.15~1.5g/cm3であり、層(A)のJIS K6400に準拠した通気度(A1、単位:cm3/cm2/sec)は0~10cm3/cm2/secであり、層(A)の合計の厚み(T1、単位:mm)は0.1~1.0mmであり、層(B)の見かけ密度は0.005~0.080g/cm3であり、層(B)のJIS K6400に準拠した通気度は0.1~250cm3/cm2/secであり、層(B)の合計の厚みは10~65mmである積層吸音材である。【選択図】なし


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    Title :

    LAMINATED SOUND ABSORBING MATERIAL


    Additional title:

    積層吸音材


    Contributors:
    NOSE KENTA (author) / SEKI TOMOYA (author) / KAWASAKI TAKASHI (author)

    Publication date :

    2024-03-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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



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