Patent ID: 8450225

Claim:
A cured or uncured structural composite material comprising a structural component in a form of a plurality of layers of textile that comprises structural fibers; a thermosetting resin component; and a viscoelastie interleaf positioned between a pair of adjacent layers of to tile, said viscoelastic interleaf comprising at least one thin layer of nonwoven material, which is comprised of thermoplastic elastomer fibers; wherein the viscoelastic interleaf and structural component are partially or completely impregnated with the thermosetting resin component; and wherein the resin component has a glass transition temperature T g that is higher than that of the viscoelastie interleaf, and wherein the thermoplastic elastomer fibers in said nonwoven material are made of at least on polymer selected from the group consisting of styrenic thermoplastic elastomers, and a blend thereof.