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METHOD FOR SELECTING AN INTERLAYER FOR VIBROACOUSTIC DAMPING, INTERLAYER FOR VIBROACOUSTIC DAMPING, AND GLAZING UNIT COMPRISING SUCH AN INTERLAYER
METHOD FOR SELECTING AN INTERLAYER FOR VIBROACOUSTIC DAMPING, INTERLAYER FOR VIBROACOUSTIC DAMPING, AND GLAZING UNIT COMPRISING SUCH AN INTERLAYER
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机译:选择用于振动阻尼的中间层的方法,用于振动阻尼的中间层以及包括这种中间层的玻璃单元
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摘要
pThe invention relates to a method for selecting a viscoelastic plastic interlayer comprising two outer layers and a central layer and intended to be incorporated between two glass sheets of a glazing unit, the method comprising the following steps: first and second components intended to constitute respectively the central layer and the outer layers are provided; the shear modulus G′ of the first and second components is measured; the material of the second component is selected only if G′≧3×107 Pa at 20° C. and between 100 Hz and 240 Hz; and the thickness h of the first component is set so that h≰0.3 mm and so that g=G′/h is between 8×108 Pa/m and 2.67×109 Pa/m at 20° C. and between 100 Hz and 240 Hz. The invention makes it possible to optimize the damping of the second and third natural frequencies of a vehicle windshield without weighing down the windshield./p [US2010295331A1]
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