ACOUSTIC LAMINATED GLAZING, ACOUSTIC INTERLAYER AND METHOD FOR SELECTING THE INTERLAYER FOR OPTIMAL ACOUSTIC DAMPING

The invention concerns a laminated glazing (2) comprising a viscoelastic plastic interlayer (3) including at least two damping films (30, 31) each having a loss factor tan d higher than 0,6 and a shear modulus G' less than 2.107 Pa over two respective temperature ranges tA and tB. The invention...

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Bibliographische Detailangaben
Hauptverfasser:	BOURE, JEAN-PHILIPPE, REHFELD, MARC, CHARLIER, JULIEN, GAUDRY, ELOI
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MINERAL OR SLAG WOOL MUSICAL INSTRUMENTS PERFORMING OPERATIONS PHYSICS SOUND-PRODUCING DEVICES SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TRANSPORTING VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Beschreibung
Zusammenfassung:	The invention concerns a laminated glazing (2) comprising a viscoelastic plastic interlayer (3) including at least two damping films (30, 31) each having a loss factor tan d higher than 0,6 and a shear modulus G' less than 2.107 Pa over two respective temperature ranges tA and tB. The invention is characterized in that the film which has at frequency 200 Hz the highest loss factor tan d over a given temperature range included in the temperature ranges tA or tB, has a shear modulus equivalent to G'eq less than the shear modulus (moduli) equivalent to the other film(s) with G' eq = G ' e Vitrage feuilleté (2) comportant un intercalaire plastique viscoélastique (3) com- prenant au moins deux films amortissants (30, 31) présentant chacun un facteur de perte tan dsupérieur à 0,6 et un module de cisaillement G' inférieur à 2.107 Pa sur deux gammes de températures respectives tA et tB, caractérisé en ce que le film qui présente à la fréquence de 200 Hz le facteur de perte tan d le plus élevé sur une plage donnée de températures incluse dans la gamme de températures tA ou tB, présente un module de cisaillement équivalent G'eq inférieur au(x) module(s) e tot de cisaillement équivalent(s) du ou des autres films, avec G ' eq = G ' e