Laminated paper machine clothing

Patent metadata

Field	Value
Publication number	US-2021269975-A1
Application number	US-201917250224-A
Country	US
Kind code	A1
Filing date	Jun 18, 2019
Priority date	Jun 20, 2018
Publication date	Sep 2, 2021
Grant date	—

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

1 . Clothing ( 10 ) for a machine for producing or refining a fibrous web, in particular a paper, cardboard, or tissue web, comprising a substrate ( 40 ) and a grid structure ( 20 , 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 , 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 ′) in such a way that 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.

2 . Clothing ( 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 ) preferably comprising a moisture-curing thermoplastic material or a reactive melt adhesive based on polyurethane or it is formed from this.

3 . Clothing, ( 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%, preferably at least 50%, further preferably at least 60% of the planar total dimensions of the grid structure ( 20 , 20 ′).

4 . Clothing ( 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 . Clothing ( 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%, preferably at least 30%, from a distance between the underside ( 32 ) and a top side ( 36 ) of the second elements ( 26 , 26 ′).

6 . Clothing ( 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 preferably 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 . Clothing ( 10 ) according to claim 1 , wherein the substrate ( 40 ) is a web consisting of warp threads and weft threads, preferably a single-ply web.

8 . Clothing ( 10 ) according to claim 1 , wherein
the grid structure comprises ( 20 , 20 ′) TPU material, preferably is formed therefrom.

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

10 . Method for producing a clothing ( 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 ′), preferably 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 ′), preferably to a temperature between 110° C. and 130° C.

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 ′), preferably between 45 g/m 2 and 55 g/m 2 .

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

Inventors

• Köckritz Uwe
• Kallenberg Jens
• Hack-Ueberall Petra

Classifications

• D21F1/0036 Primary

  Multi-layer screen-cloths · CPC title

• D21F1/0045 Primary

  Triple layer fabrics · CPC title

• D21F11/06

  of the cylinder type · CPC title