The invention relates to a visco-elastic plastic spacer intended to be incorporated between two glass sheets of glazing to provide said glazing with vibro-acoustic damping properties, the spacer comprising: - two outer layers made of standard PVB, - a first and second inner layer made of visco-elastic plastic based on polyvinyl acetal and plasticiser, with enhanced acoustic properties, - a central layer made of standard PVB, the first and second inner layers being arranged between the central layer and the first and second outer layers, respectively. By means of the invention it is possible to provide a visco-elastic plastic spacer intended to be incorporated between two glass sheets to form laminated glazing having vibro-acoustic damping properties, enabling an enhancement of the acoustic insulation properties, particularly in a frequency range between 1000 Hz and 5000 Hz, where the human ear is most sensitive.


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    Title :

    Visco-elastic plastic spacer for vibro-acoustic damping and glazing comprising such a spacer


    Contributors:

    Publication date :

    2019-01-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge / 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 / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES