PROBLEM TO BE SOLVED: To provide a lightweight/thin complex nonwoven fabric for a sound absorption material excellent in sound absorption performance in a frequency region of 3,000-5,000 Hz, producible easily and inexpensively, and further excellent in flame resistance.SOLUTION: A complex nonwoven fabric for a sound absorption material includes a laminated structure formed by laminating a short fiber nonwoven fabric containing crimped hollow fibers and a sound absorption film layer comprising a synthetic resin film. The thickness of the short fiber nonwoven fabric is below 12 mm, and the thickness of the sound absorption film layer is 20-60 μm.
【課題】本発明は、3000〜5000Hzの周波数域における吸音性能に優れ、軽量・薄地であり、簡便でしかも安価に製造できる上、難燃性にも優れる吸音材用複合不織布を提供する。【解決手段】本発明に係る吸音材用複合不織布は、捲縮中空繊維を含む短繊維不織布と、合成樹脂フィルムからなる吸音フィルム層とが積層された積層構造を含み、前記短繊維不織布の厚さが12mm未満であり、前記吸音フィルム層の厚さが20〜60μmであることを特徴とする。【選択図】図1
COMPLEX NONWOVEN FABRIC FOR SOUND ABSORPTION MATERIAL
吸音材用複合不織布
2015-10-05
Patent
Electronic Resource
Japanese
IPC: | 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 / D04H Herstellen von flächigem Textilgut, z.B. aus Fasern oder fadenförmigem Material , MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL |
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