NON-WOVEN-FABRIC LAYERED BODY FOR SOUND-ABSORBING MATERIAL, AND SOUND-ABSORBING MATERIAL

An object of the present invention is to provide a non-woven fabric for a sound-absorbing material and a sound-absorbing material which are excellent in thickness recoverability and followability during molding and excellent in sound-absorbing performance. In order to solve such a problem, there is...

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Bibliographische Detailangaben
Hauptverfasser:	OMORI, Taira, NAKAHARA, Makoto
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR 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 METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS NON-WOVEN FABRICS PERFORMING OPERATIONS PHYSICS SOUND-PRODUCING DEVICES TEXTILES TRANSPORTING TRIMMINGS VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR WADDING
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Beschreibung
Zusammenfassung:	An object of the present invention is to provide a non-woven fabric for a sound-absorbing material and a sound-absorbing material which are excellent in thickness recoverability and followability during molding and excellent in sound-absorbing performance. In order to solve such a problem, there is provided a non-woven-fabric layered body for a sound-absorbing material in which a non-woven fabric layer α and a non-woven fabric layer β are layered, in which the non-woven fabric layer α contains short fibers A having a fineness of 0.4 to 3.8 dtex, short fibers B having a fineness of 4.0 to 22.0 dtex, and short fibers C1 containing a resin having a melting point of 135 to 190°C in an outer surface layer, a total content mass of the short fibers A and the short fibers B with respect to a total mass of the non-woven fabric layer α is 86 to 98% by mass, a content mass of the short fibers C1 with respect to the total mass of the non-woven fabric layer α is 2 to 14% by mass, and a content mass ratio of the short fibers A and the short fibers B (content mass of short fibers A/content mass of short fibers B) is 0.05 to 3.80, the non-woven fabric layer β contains short fibers C2 containing a resin having a melting point of 70 to 190°C in an outer surface layer, and a content mass of the short fiber C2 with respect to a total mass of the non-woven fabric layer β is 20 to 60% by mass, and the non-woven fabric layer α and the non-woven fabric layer β are partially fused.