Laminated paper machine clothing

Patent metadata

Field	Value
Publication number	US-11505898-B2
Application number	US-201917250224-A
Country	US
Kind code	B2
Filing date	Jun 18, 2019
Priority date	Jun 20, 2018
Publication date	Nov 22, 2022
Grant date	Nov 22, 2022

Abstract

The invention relates to a clothing (10) for a machine to manufacture or refine a fibrous web, in particular a paper, cardboard, or tissue web, comprising a substrate (40) and a grid structure (20) applied on the substrate (40), on which the fibrous web is transported when the clothing (10) is used as intended, wherein the grid structure (20′) comprises a plurality of first elements (24′), all of which aligned in a first direction, and a plurality of second elements (26′), all of which aligned in a second direction, which is different from the first direction, wherein the first elements (24′) penetrate the second elements (26′), forming the grid structure (20′), such that an underside of the first elements (24′) facing the substrate (40) and an underside of the second elements (26′) facing the substrate (40) are located in a common plane. In addition, the present invention relates to a method for producing such a clothing.

First claim

The invention claimed is:

1. Structured fabric ( 10 ) for a machine for producing or refining a fibrous web, comprising a substrate ( 40 ) and a grid structure ( 20 , 20 ′) applied on the substrate ( 40 ), on which the fibrous web is transported, wherein the grid structure ( 20 , 20 ′) comprises a plurality of first elements ( 24 , 24 ′), all of which are aligned in a first direction, and a plurality of second elements ( 26 , 26 ′), all of which are aligned in a second direction which differs from the first direction,
wherein the first elements ( 24 , 24 ′) penetrate the second elements ( 26 , 26 ′), forming a grid structure ( 20 , 20 ′), wherein an underside ( 30 ) facing the substrate ( 40 ) of the first elements ( 24 , 24 ′) and an underside ( 32 ) of the second elements ( 26 , 26 ′) facing the substrate ( 40 ) are in a common plane,
wherein the plurality of first elements extend continuously across the structured fabric in the first direction and the plurality of second elements extend continuously across the structured fabric in the second direction, and
wherein the entire top side, facing away from the substrate, of each first element is not in a common plane with the entire top side, facing away from the substrate, of each second element so as to form a pattern of parallel grooves across the structured fabric.

2. Structured fabric ( 10 ) according to claim 1 , wherein a bonding layer ( 38 ) is arranged between the substrate ( 40 ) and the grid structure ( 20 , 20 ′), which connects the substrate ( 40 ) with the grid structure ( 20 , 20 ′), with the adhesive layer ( 38 ) comprising a moisture-curing thermoplastic material or a reactive melt adhesive based on polyurethane or it is formed from this.

3. Structured fabric ( 10 ) according to claim 1 , wherein the first elements ( 24 , 24 ′) and the second elements ( 26 , 26 ′) are provided in the common plane, which is defined by the underside ( 30 ) of the first elements ( 24 , 24 ′) and the underside ( 32 ) of the second elements ( 26 , 26 ′), forming a contact area, which comprises at least 40% of the planar total dimensions of the grid structure ( 20 , 20 ′).

4. Structured fabric ( 10 ) according to claim 1 , wherein a top ( 34 ) of the first elements ( 24 , 24 ′) facing away from the substrate ( 40 ) and a top ( 36 ) of the second elements ( 26 , 26 ′) facing away from the substrate are not in a common plane.

5. Structured fabric ( 10 ) according to claim 1 , wherein a distance between the underside ( 30 ) and a top side ( 34 ) of the first elements ( 24 , 24 ′) differs by at least 20% from a distance between the underside ( 32 ) and a top side ( 36 ) of the second elements ( 26 , 26 ′).

6. Structured fabric ( 10 ) according to claim 1 , wherein the grid structure ( 20 , 20 ′) furthermore comprises at least a plurality of additional elements, all of which are aligned in a further direction, which is oriented differently in reference to the first direction and the second direction, wherein an underside of the further elements facing the substrate ( 40 ) is located in the common plane, which is defined by the underside ( 30 ) of the first elements ( 24 , 24 ′) and the underside ( 32 ) of the second elements ( 26 , 26 ′).

7. Structured fabric ( 10 ) according to claim 1 , wherein the substrate ( 40 ) is a web comprising warp threads and weft threads, and the web is a single-ply web.

8. Structured fabric ( 10 ) according to claim 1 , wherein the grid structure comprises ( 20 , 20 ′) TPU material.

9. Machine for producing or refining a fibrous web, comprising a structured fabric ( 10 ) according to claim 1 , wherein the structured fabric ( 10 ) is used as a structured TAD sieve in the machine.

10. Method for producing a structured fabric ( 10 ) according to claim 1 , wherein the substrate ( 40 ) and the grid structure ( 20 , 20 ′) are manufactured separately and then glued together.

11. Method according to claim 10 , wherein initially adhesive is applied on the grid structure ( 20 , 20 ′), on the underside ( 30 ) of the first elements ( 24 , 24 ′) facing the substrate ( 40 ), and the underside ( 32 ) of the second elements ( 26 , 26 ′) facing the substrate ( 40 ) of the grid structure ( 20 , 20 ′), before the grid structure ( 20 , 20 ′) is laminated to the substrate ( 40 ).

12. Method according to claim 11 , wherein the adhesive is heated to a temperature above 100° C. before applying it to the grid structure ( 20 , 20 ′.

13. Method according to claim 11 , wherein between 40 g/m 2 and 80 g/m 2 of the adhesive is applied to the grid structure ( 20 , 20 ′).

14. Method according to claim 11 , wherein the adhesive is first applied to a roller, which together with a counter roller forms a nip, through which the grid structure ( 20 , 20 ′) is guided for wetting with the adhesive.

15. Method according to claim 11 , wherein the adhesive is sprayed to the grid structure ( 20 , 20 ′) for wetting.

Assignees

• Voith Patent Gmbh
• First Quality Tissue Se Llc

Inventors

• Köckritz Uwe
• Kallenberg Jens
• Hack-Ueberall Petra
• Elliott Gregory Allen
• Hensler Thomas Anthony
• Sealy Ii James E
• Begin Marc Paul

Classifications

• D21F11/06

  of the cylinder type · CPC title

• D21F1/0036 Primary

  Multi-layer screen-cloths · CPC title

• D21F1/0045 Primary

  Triple layer fabrics · CPC title