Method for producing a composite nonwoven fabric and device for producing a composite nonwoven fabric
AssigneeAndritz Kuesters GmbH
InventorsHenning Vomhof, Andreas Reiter, Dennis Latendorf
Life of this patent
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Abstract
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 includes attaching, 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. The headbox has a round flow or cross flow distributor with a rotating or static turbulence generator.
Claims24
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.
A device 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 device comprising a production line which comprises:
- at least one conveyor which is configured to transport at least the first layer in a conveying direction, the at least one conveyor comprising a first screen belt;
- a headbox which is arranged above the at least one conveyor, the headbox comprising a round flow or cross flow distributor, wherein the round flow or cross flow distributor comprises a rotating or static turbulence generator for applying the short fibers to the first layer so as to produce the second layer;
- a first water jet device which is configured to compress at least one of the first layer and the second layer downstream of the headbox;
- and
- a first hydroentanglement device which is configured to entangle the short fibers of the second layer with one another downstream of the headbox,
- wherein,
- a portion of the first screen belt extends below each of the headbox, the first water jet device, and the first hydroentanglement device.
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 downstream of the headbox in the conveying direction via a compression unit;
- and
- after the compressing, 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.
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
- after the compressing, 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.
Dependencies are inferred from the claim text.