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 2.10 Pa over two respective temperature ranges tA and tB. The invention...

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Bibliographische Detailangaben
Hauptverfasser:	REHFELD MARC, CHARLIER JULIEN, GAUDRY ELOI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS TRANSPORTING
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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 2.10 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 '.