Voluminous fiber laminates and their production

Abstract

A voluminous fiber laminate is described, which contains one or more layers of an absorbent fibrous material, which is compacted through water needling, between at least two carrier nonwoven materials, it having areas having higher needling density and areas having lower needling density over the entire area of the fiber laminate to form a quilted structure. A device cited for this purpose is distinguished in that the water needling unit also has, in addition to nozzle strips having a large number of nozzles per unit area, nozzle strips having a lower number of nozzles, or one or more nozzle strips are dispensed with completely.

1 . A voluminous fiber laminate containing one or more layers of an absorbent fibrous material, which is compacted through water needling, between at least two carrier nonwoven materials, characterized in that it has areas having higher needling density and areas having lower needling density over the entire area of the fiber laminate to form a quilted structure.  
     
     
         2 . A cleaning or wiping cloth comprising a voluminous fiber laminate according to  claim 1 .  
     
     
         3 . A device for producing a voluminous fiber laminate according to  claim 1 , comprising 
 one or more spin bonding or carding unit(s),    one or more air compaction or calender unit(s),    a possibly directly adjoining unit for applying absorbent fibrous material to the precompacted fibrous nonwoven material and    a water needling unit, characterized in that the water needling unit also has, in addition to nozzle strips having a large number of nozzles per unit area, nozzle strips having a lower number of nozzles, or a water beam is dispensed with completely.    
     
     
         4 . A method for producing a voluminous fiber laminate made of composite nonwoven materials, in which one more layers of an absorbent fibrous material are compacted through waterjet needling between the carrier nonwoven materials, characterized in that areas having higher needling density and areas having lower needling density are generated over the entire area of the composite nonwoven material to form quilted structures.