| 摘要 |
A laminated structure appropriate for use in constructing walls, floors, ceilings or doors, has a selected area and in one embodiment comprises two external layers of one or more materials such as, but not limited to, gypsum, at least one internal constraining layer having less than said selected area, and two or more internal layers of a viscoelastic glue separated by said at least one internal constraining layer, wherein each of said layers of viscoelastic glue is patterned to cover a selected percentage, but not all, of said area of said laminated structure thereby to allow moisture to pass through said structure. |
