SOUND-ABSORBING LAMINATED MATERIAL Russian patent published in 2014 - IPC B32B7/10 E04B1/84 

FIELD: construction.

SUBSTANCE: sound-absorbing laminated material includes a base, a polymer layer, an additional layer in the form of foil and an anti-adhesive layer. The base is a non-woven web. The polymer layer is a self-adhesive coating based on butyl rubber, at one side of which there is an anti-adhesive layer, and at the other one - an additional layer from foil connected by means of an adhesive layer with the base. On the outer side of the base there is a face coating made of foil connected to it by means of an adhesive layer with the appropriate ratio of layer thickness. The face coating may be made in the form of a metallised polyethylene terephthalate film.

EFFECT: invention makes it possible to increase efficiency of sound-absorbing properties in a wide range of frequencies, to expand temperature of material operation, to improve vibration damping properties, to simplify assembly of a material on different coatings.

2 cl, 1 dwg, 1 tbl