Layered Sound Absorptive Non-Woven Fabric

Abstract

The invention relates to the layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer ( 1, 3 ) of the fibrous material at which the resonance membrane is created by a layer ( 2 ) of nanofibres having diameter to 600 nanometers and of surface weight 0.1 to 5 g/m 2 , at the same time the resonance membrane together with at least one layer ( 1, 3 ) of fibrous material is formed by cross laying to the required thickness and surface weight.

1 . The layered sound absorptive non-woven textile containing the resonance membrane and at least one another layer of fibrous material, characterised by that the resonance membrane is created by a layer ( 2 ) of nanofibres of diameter to 600 nanometers and of surface weight 0.1 to 5 g/m 2 . 
     
     
         2 . The layered sound absorptive fabric according to the  claim 1 , characterised by that the layer ( 2 ) of nanofibres is created through electrostatic spinning of polymer solution. 
     
     
         3 . The layered sound absorptive fabric according to the  claim 2 , characterised by that the layer ( 2 ) of nanofibres is joined together with at least one layer ( 1 ,  3 ) of carded fibrous web composed of fibres having diameter of 10 to 45 micrometers and of the surface weight 5 to 100 g/m 2 . 
     
     
         4 . The layered sound absorptive fabric according to the  claim 3 , characterised by that the layer ( 2 ) of nanofibres is joined on its each side with a layer ( 1 ,  3 ) of carded fibrous web created by fibres having diameter of 10 to 45 micrometers and of surface weight 5 to 100 g/m 2 . 
     
     
         5 . The layered sound absorptive non-woven textile according to any of the previous claims, characterised by that the resonance membrane together with another at least one layer ( 1 ,  3 ) of fibrous material is formed by means of cross laying into the system of layers having the required thickness and/or surface weight.