THREE-DIMENSIONAL SHAPED NONWOVEN STRUCTURES FOR ACOUSTIC INSULATION AND PRODUCTION METHOD THEREOF

A three-dimensional (3D) nonwoven structure is provided having fibers oriented in different directions and superficial shapes in predefined areas. The structure comprises at least three layers, a top layer, a bottom nonwoven layer and a randomly oriented fiber layer, connected with fibers in predefi...

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Bibliographische Detailangaben
Hauptverfasser:	CUNHA SOUTINHO, HELDER FILIPE, ESTEVES SOUSA FANGUEIRO, RAUL MANUEL
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR BRAIDING BUILDING CEILINGS COTTON-WOOL FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS FIXED CONSTRUCTIONS FLOORS GENERAL BUILDING CONSTRUCTIONS INSULATION OR OTHER PROTECTION OF BUILDINGS KNITTING LACE-MAKING 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 PHYSICS ROOFS SOUND-PRODUCING DEVICES TEXTILES TRIMMINGS WADDING WALLS, e.g. PARTITIONS
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Beschreibung
Zusammenfassung:	A three-dimensional (3D) nonwoven structure is provided having fibers oriented in different directions and superficial shapes in predefined areas. The structure comprises at least three layers, a top layer, a bottom nonwoven layer and a randomly oriented fiber layer, connected with fibers in predefined areas. The layers are connected using a special technique based on the needle board configuration of the needle-punching machine, and may be needled with different needle positions. A special needle loom feeding system to feed the different layers and to produce the product is also disclosed.