SOUND ABSORBING MATERIAL, SOUND ABSORPTION PERFORMANCE IMPROVING MEMBER, AND VEHICLE MEMBER

A sound absorbing material which sequentially comprises a resin film, a first base material layer having a communicating pore, and a second base material layer having a communicating pore in this order, wherein the density of the first base material layer is lower than the density of the second base...

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Bibliographische Detailangaben
Hauptverfasser:	TAKAYASU Satoshi, YOKOKURA Ai, KOTAKE Tomohiko
Format:	Patent
Sprache:	eng ; fre ; jpn
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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Beschreibung
Zusammenfassung:	A sound absorbing material which sequentially comprises a resin film, a first base material layer having a communicating pore, and a second base material layer having a communicating pore in this order, wherein the density of the first base material layer is lower than the density of the second base material layer. L'invention concerne un matériau absorbant acoustique qui comprend séquentiellement un film de résine, une première couche de matériau de base ayant un pore de communication, et une seconde couche de matériau de base ayant un pore de communication dans cet ordre, la densité de la première couche de matériau de base étant inférieure à la densité de la seconde couche de matériau de base. 樹脂フィルムと、連通孔を有する第一基材層と、連通孔を有する第二基材層と、をこの順に備え、第一基材層の密度が、第二基材層の密度よりも低い、吸音材。