US 12,460,329 B2
Method for producing a composite nonwoven fabric and device for producing a composite nonwoven fabric
Henning Vomhof, Cologne (DE); Andreas Reiter, Arnsberg (DE); and Dennis Latendorf, Krefeld (DE)
Assigned to ANDRITZ KUESTERS GMBH, Krefeld (DE)
Appl. No. 17/791,214
Filed by ANDRITZ KUESTERS GMBH, Krefeld (DE)
PCT Filed Dec. 8, 2020, PCT No. PCT/EP2020/085108
§ 371(c)(1), (2) Date Jul. 7, 2022,
PCT Pub. No. WO2021/139945, PCT Pub. Date Jul. 15, 2021.
Claims priority of application No. 10 2020 100 472.9 (DE), filed on Jan. 10, 2020.
Prior Publication US 2023/0340709 A1, Oct. 26, 2023
Int. Cl. D04H 1/498 (2012.01); D04H 1/4374 (2012.01); D04H 1/492 (2012.01); D04H 3/11 (2012.01); D04H 5/03 (2012.01); D04H 18/04 (2012.01)
CPC D04H 1/498 (2013.01) [D04H 1/4374 (2013.01); D04H 1/492 (2013.01); D04H 3/11 (2013.01); D04H 5/03 (2013.01); D04H 18/04 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for producing a composite nonwoven fabric having at least two layers, wherein a first layer is made of long fibers, and a second layer is made of short fibers, the method comprising:
applying, in a production line, the short fibers of the second layer to the long fibers of the first layer in a wet laid process via a headbox comprising a round flow or cross flow distributor, wherein the round flow or cross flow distributor comprises a rotating or static turbulence generator so as to provide the composite nonwoven fabric having the at least two layers;
compressing at least one of the first layer and the second layer with a water jet device downstream of the headbox in the conveying direction; and
performing a first hydroentangling of the short fibers of the second layer with at least one of with one another and with the long fibers of the first layer via a first hydroentanglement device,
wherein,
each of the applying, the compressing, and the first hydroentangling is performed on a same screen belt.