| 摘要 |
The present invention provides a laminate structure for attenuating vibration and damping noise, and a method for manufacturing the same. The laminate structure includes first and second metallic constraining layers, and a viscoelastic layer disposed between and bonded to both constraining layers. The viscoelastic layer includes an amount of an external cross-linking agent, such as metal acetylacetonate, in excess of a stoichiometric quantity thereof. The laminate structure also includes a layer of 100% inorganic, hexavalent chrome free pretreatment, such as aqueous chromium (III) phosphate-silicate, disposed between and bonded to the viscoelastic layer and each constraining layer. The method includes: applying a layer of pretreatment to the first and second constraining layers; applying the viscoelastic layer to one or both constraining layers; and laminating the constraining layers, wherein each of the constraining layers has a concave up coil orientation disposed in opposing relation to one another prior to laminating. |
