| 摘要 |
Provided are a combined material with a high sound absorption for traffic acoustic barriers and a preparation method therefor. The combined material with high sound absorption comprises a porous sound absorption material layer (1) and a cladding layer (2) sealing and cladding the porous sound absorption material layer (1). The cladding layer (2) is a microporous film layer of expanded polytetrafluoroethylene, or a modified film layer of microporous film of expanded polytetrafluoroethylene. The preparation method for the combined material layer with high sound absorption comprises the following steps: 1. preparing a porous sound absorption material and a microporous film of expanded polytetrafluoroethylene or a modified microporous film of expanded polytetrafluoroethylene; 2. tailoring the porous sound absorption material; 3. cladding the microporous film of expanded polytetrafluoroethylene or the modified microporous film of expanded polytetrafluoroethylene over the surface of the porous sound absorption material; 4. sealing the connections at the cladding and joints; and 5. packaging the material after quality inspection. The combined material with high sound absorption has not only an acoustic insulation function but also a sound absorption function, thus being capable of notably reducing noises, having advantages of a long life span, environmental protection, flame retardance and a moisture-proofing property. |
