Flexible lightweight multi-layer panel for sound insulation application in construction
AssigneeNano and Advanced Materials Institute Limited
InventorsLiang Zhang, Bin Xiao, Pingjian Zhou, Chun Kwong Yeung, Jifan Li
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Abstract
The present invention provides a flexible lightweight sound insulation panel composed of multiple layers aligned in a sequence of high-density sound insulation layer, sound damping layer, medium-density sound reflection layer, low-density sound absorption layer, medium-density sound reflection layer, sound damping layer, and high-density sound insulation layer. The sound damping layer is composed of polyurethane foam. The flexible lightweight multi-layer panel has Sound Transmission Class (STC) of at least 40 dB according to ASTM E90.
Claims19
A flexible lightweight multi-layer panel for sound insulation applications in construction, comprising:
- at least two high-density sound insulation layers having a density of 2.0 g/cm3 to 2.3 g/cm3;
- at least two sound damping layers;
- at least two medium-density sound reflection layers having a density of 1.6 g/cm3 to 1.9 g/cm3;
- and
- at least one low-density sound absorption layer having a density of 0.3 g/cm3 to 0.6 g/cm3;
- wherein the flexible lightweight multi-layer panel has Sound Transmission Class (STC) of at least 40 dB according to ASTM E90;
- wherein the at least two high-density sound insulation layers, the at least two sound damping layers and the at least two medium-density sound reflection layers are symmetrically arranged about the low-density sound absorption layer, such that the low-density sound absorption layer is positioned at a center of the panel, and is sandwiched between the medium-density sound reflection layers, the sound damping layers, and the high-density sound insulation layers.
Dependencies are inferred from the claim text.