COMPOSITE NON-WOVEN FABRIC FOR SOUND ABSORBING MATERIAL

PROBLEM TO BE SOLVED: To provide a sound absorbing material which has excellent sound-absorption characteristics for sound with a frequency of approximately 1500-3000 Hz, is superior to flame resisting performance, is lightweight but rigid, and can be manufactured easily.SOLUTION: In a composite non...

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Bibliographische Detailangaben
1. Verfasser:	TANAKA KAZUMITSU
Format:	Patent
Sprache:	eng
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 WADDING
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a sound absorbing material which has excellent sound-absorption characteristics for sound with a frequency of approximately 1500-3000 Hz, is superior to flame resisting performance, is lightweight but rigid, and can be manufactured easily.SOLUTION: In a composite non-woven fabric for sound absorbing material, staple fiber non-woven fabrics containing crimp hollow fiber and sound absorption films are laminated. The apparent density of the staple fiber non-woven fabric is 0.013-0.017 g/cm, the thickness of the staple fiber non-woven fabric is 12-21 mm, and the thickness of the sound absorption film is 20-60 μm.