| abstract |
The present invention relates to a multilayer foam composite element having a total thickness of d, comprising at least three continuous foamed foams. At least one inner layer includes a recess, and the two outer layers do not have a recess. The composite element is characterized in that i) the volume of the recess is 20 to 70% by volume of the inner layer comprising the recess, and ii) the thickness of the layer comprising the recess is 20 to 80% of the total thickness d. .n n n Recess, foam, sound absorption, continuous bubble, multilayer foam |