Process and an apparatus for the production of a voluminous nonwoven fabric

Abstract

An apparatus for producing a nonwoven fabric, including a spinneret for extruding a plurality of filaments, and a device for collecting the filaments and forming a nonwoven fabric, at least one thermal treatment device, at least one bonding device, wherein the at least one thermal treatment device includes at least one heating device configured to direct gas against said nonwoven fabric at a temperature between 80 and 190° C.

1 . An apparatus for producing a nonwoven fabric, comprising a spinneret for extruding a plurality of filaments, and means for collecting the filaments and forming a nonwoven fabric, at least one thermal treatment device, at least one bonding device, wherein said at least one thermal treatment device comprises at least one heating device configured to direct gas against said nonwoven fabric at a temperature between 80 and 190° C. 
     
     
         2 . The apparatus according to  claim 1 , comprising a pre-heating device configured to direct the gas (G 1 ) against said nonwoven fabric at a temperature between 70 and 185° C. 
     
     
         3 . The apparatus according to  claim 1 , further comprising a device for entangling said filaments to each other is arranged upstream of said heating device and also said pre-heating device, the entangling device including a couple of rollers, a needle loom or an ultrasound device. 
     
     
         4 . The apparatus according to  claim 2 , further comprising a device for entangling said filaments to each other is arranged upstream of said heating device and also said pre-heating device, the entangling device including a couple of rollers, a needle loom or an ultrasound device. 
     
     
         5 . The apparatus according to  claim 1 , further comprising cooling means comprising at least one among:
 a cooling device configured to direct a flow of gas against said nonwoven fabric at a temperature between 30 and 140° C.;   a suctioning roller;   a cooled conveyor belt; and   a suctioning roller.