A molded ceiling material for vehicles having a substrate layer containing a porous core layer, a surface member and a ventilation control mechanism to control the ventilation volume that is vented from a cabin side of the surface member to the substrate layer. Sound generated in the vehicle cabin is absorbed by the substrate layer through the ventilation control mechanism. That is, the molded ceiling material is equipped with sound-absorption performance for sound from the cabin side of the vehicle. If the sound-absorption rate is increased, the ventilation volume to the substrate layer is increased. If the sound-absorption rate is decreased, the ventilation volume to the substrate layer is reduced. The sound-absorption rate of the molded ceiling material can be controlled regardless of the thickness of the substrate layer. Consequently, the molded ceiling materials for vehicles can be provided with sound-absorption performance corresponding to the sound-absorption characteristics of the vehicle.


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    Title :

    MOLDED CEILING MATERIAL FOR VEHICLE


    Contributors:

    Publication date :

    2024-10-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    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 / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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