A sound attenuating material having a homogenous mixture of an organic man-made fiber, an inorganic man-made fiber, a binder, and a cellulose material wherein the organic man-made fiber is polyester, the inorganic man-made fiber is fiberglass, and the binder is a thermosetting resin. A sound attenuating composite is defined by the sound attenuating material and a ground EVA or a mixture of EVA and one or more recycled materials to define a gradient density sound attenuating composite material. Further, the gradient density composite may optionally include a polyfilm upon which the ground EVA or recycled materials may be disposed or two layers of polyfilm to surround the EVA or EVA mixture. The EVA may be pure EVA or may include a mineral fill.


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    Title :

    Gradient density sound attenuating composite and process for making


    Contributors:

    Publication date :

    2017-07-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / 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 / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR




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