To provide a nonwoven fabric for a sound absorbing material excellent in sound absorbing performance in low and high frequency areas, and excellent in productivity and quality, and to provide a manufacturing method of the sound absorbing material and the nonwoven fabric.SOLUTION: A nonwoven fabric for a sound absorbing material contains 30 to 80 mass% of a staple fiber A having a fineness of 0.4 to 0.9 dtex and 2 mass% or more of a staple fiber B having a fineness of 0.0005-0.3 dtex, and a transmission coefficient of the staple fiber A represented by the following expression (1) is in a range of 15 to 260: transmission coefficient=(fineness×strength×√elongation×√number of crimps×√degree of crimp)/(fiber length)--(1), where the fineness is expressed by dtex, the strength is expressed by cN/dtex, the elongation is expressed by %, the number of crimps is expressed by the number of ridges/25 mm, the degree of crimp is expressed by %, and the fiber length is expressed by cm.SELECTED DRAWING: None

    【課題】本発明は、低周波領域と高周波域の吸音性能に優れ、生産性に優れるとともに、品位にも優れた吸音材用不織布、吸音材および吸音材用不織布の製造方法を提供することを課題とする。【解決手段】本発明の吸音材用不織布は、繊度が0.4~0.9dtexの短繊維Aを30~80質量%含有し、繊度が0.0005~0.3dtexの短繊維Bを2質量%以上含有し、前記短繊維Aの下記の式(1)に示す通過係数は15~260の範囲内である。通過係数=(繊度×強度×√伸度×√捲縮数×√捲縮度)/(繊維長) (1)<繊度(dtex)、強度(cN/dtex)、伸度(%)、捲縮数(山/25mm)、捲縮度(%)、繊維長(cm)>【選択図】なし


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    Titel :

    NONWOVEN FABRIC FOR SOUND ABSORBING MATERIAL, SOUND ABSORBING MATERIAL, AND MANUFACTURING METHOD OF NONWOVEN FABRIC


    Weitere Titelangaben:

    吸音材用不織布、吸音材、および吸音材用不織布の製造方法


    Beteiligte:

    Erscheinungsdatum :

    16.02.2022


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    D04H Herstellen von flächigem Textilgut, z.B. aus Fasern oder fadenförmigem Material , MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL / 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 / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES



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