The present invention provides a structure that improves sound absorption coefficient.The present invention provides a structure comprising: a foam resin layer formed of a foam material having a foaming ratio of 1.1 to 1.8 times; and a sound absorbing layer formed of a foam material having a foaming ratio of 10 to 30 times, the sound absorbing layer laminated on the foam resin layer.
STRUCTURE FOR VEHICLES AND AIR CONDITIONING DUCT FOR VEHICLES
STRUKTUR FÜR FAHRZEUGE UND KLIMAANLAGENLEITUNG FÜR FAHRZEUGE
STRUCTURE POUR VÉHICULES ET CONDUIT DE CLIMATISATION POUR VÉHICULES
2022-02-23
Patent
Electronic Resource
English
IPC: | B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
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