ACOUSTIC NONWOVEN CLOTH FOR PERFORATED CEILING ELEMENTS Russian patent published in 2012 - IPC E04B1/90 D04H1/42 D04H5/04 D06M11/71 E04B1/86 E04B1/84 E04C2/32 

FIELD: construction.

SUBSTANCE: material has weight referred to an area unit of less than 60 g/m², contains less than 15 g/m² of adhesive substance and less than 5 g/m² of the binder. The material also contains a layer with a weight referred to an area unit of not more than 45 g/m², including a mixture of fibres of more than 30 g/m² and not more than 10 g/m² of burning inhibitor. Application of structures is described, which contain the specified acoustic material and the perforated metal ceiling element and having, when measured in compliance with DIN EN 13823, the value of SMOGRA of not more than 30 m²/s² and the value of TSP(600 s) of not more than 50 m².

EFFECT: absence of problems in processing and production of least possible amount of smoke in case of fire.

9 cl, 1 dwg, 2 ex