CONSTRAINED LAYER, COMPOSITE, ACOUSTIC DAMPING MATERIAL

摘要

A constrained layer, composite structure for damping acoustic vibrations includes an extensional layer comprised of a first polymeric material, and a constraining layer of a second polymeric material. The modulus of elasticity of the constraining layer is greater than that of the extensional layer. In use, the structure is disposed on the surface of an article in which acoustic vibrations are to be damped so that the extension layer overlies the surface. Also disclosed are methods for preparing the structure, including automated methods.