A viscoelastic plastic interlayer to be incorporated between two glass sheets forms a laminated glazing with vibro-acoustic damping properties. The interlayer includes at least one layer made of viscoelastic plastic with vibro-acoustic damping properties. The interlayer is tinted in the bulk at least on a part of its surface. The interlayer is such that the resonant frequency f2 of the second resonance mode of a laminated glazing bar with a surface area of 25 mm×300 mm composed of two glass sheets each 2.1 mm thick, between which is incorporated the interlayer, determined by measuring the mechanical impedance (MIM) at 20° C. according to standard ISO 16940, is between 760 Hz and 1000 Hz and the loss factor η2 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25.
VISCOELASTIC PLASTIC INTERLAYER FOR VIBRO-ACOUSTIC DAMPING AND GLAZING COMPRISING SUCH AN INTERLAYER
2017-07-27
Patent
Elektronische Ressource
Englisch
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 / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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