Viscoelastic plastic sandwiches for vibration and sound damping and glass windows including such sandwiches

摘要

The invention relates to a viscoelastic plastic sandwich, which is used for sandwiching between two glass plates to form a laminated glass with vibration-resistant acoustic damping. The sandwich comprises at least one (3) layer made of viscoelastic plastic material. UE has a Vibration-Acoustic damping property, in which INCOR is the second mode of F2 resonance frequency of 25mm *300mm laminated glass windows with two glass plates of 2.1mm thickness. Penetrating poreAccording to ISO 16940's 20 degree C mechanical impedance (MIM) measurement, the loss factor is between 760 Hz and 1000 Hz. In the second resonance mode of the same line determined by MIM under the same conditions, 2 is greater than or equal to 0.25. The invention can reduce the thickness of the glass plate without reducing the vibration and noise damping performance.