COMPLEX NONWOVEN FABRIC FOR SOUND ABSORPTION MATERIAL

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 f...

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Bibliographische Detailangaben
1. Verfasser:	TANAKA KAZUMITSU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BRAIDING COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS KNITTING LACE-MAKING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL NON-WOVEN FABRICS PERFORMING OPERATIONS TEXTILES TRANSPORTING TRIMMINGS VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR WADDING
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Zusammenfassung:	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