Acoustic glazing element
AssigneeSaint-Gobain Glass France
InventorsJean-Gerard Leconte, Marc Rehfeld, Pierre Chaussade
Life of this patent
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Abstract
The invention therefore provides glazing which, to ensure improved acoustic insulation properties, requires not only an acoustic polymeric interlayer but also a suitable distribution of the masses of the elements on either side of the interlayer.
Claims14
An acoustic glazing having enhanced acoustic insulation properties, comprising a first glass substrate, at least one polymeric interlayer, a second glass substrate, a plastic substrate and a third glass substrate, wherein:
- the polymeric interlayer comprises a material having enhanced acoustic damping properties at 20° C. and at 200 Hz, a loss factor tanδ of 0.6 or higher and a shear modulus G′ of less than 2×107 N/m2;
- and
- the weight of the first glass substrate placed on one side of the polymeric interlayer is not less than 20% of the total weight of the glazing and the weight of all of the other elements placed on the other side of the polymeric interlayer is also not less than 20% of the total weight of the glazing.
An acoustic glazing having enhanced acoustic insulation properties, comprising a first glass substrate, at least one polymeric interlayer, and an at least 15 mm thickness of various combined substrates of glass and plastic layers, wherein:
- the polymeric interlayer comprises a material having enhanced acoustic damping properties at 20° C. and at 200 Hz, a loss factor tanδ of 0.6 or higher and a shear modulus G′ of less than 2×107 N/m2;
- and
- the weight of the first glass substrate placed on one side of the polymeric interlayer is not less than 20% of the total weight of the glazing and the weight of all of the other elements placed on the other side of the polymeric interlayer is also not less than 20% of the total weight of the glazing.
Dependencies are inferred from the claim text.