EP2199458A1 - Toile de formage - Google Patents

Toile de formage Download PDF

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Publication number
EP2199458A1
EP2199458A1 EP08022241A EP08022241A EP2199458A1 EP 2199458 A1 EP2199458 A1 EP 2199458A1 EP 08022241 A EP08022241 A EP 08022241A EP 08022241 A EP08022241 A EP 08022241A EP 2199458 A1 EP2199458 A1 EP 2199458A1
Authority
EP
European Patent Office
Prior art keywords
carrier web
transverse threads
threads
forming fabric
fabric according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08022241A
Other languages
German (de)
English (en)
Other versions
EP2199458B1 (fr
Inventor
Walter Dr. Best
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Helmbach & Cokg GmbH
Heimbach GmbH and Co KG
Original Assignee
Helmbach & Cokg GmbH
Heimbach GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Helmbach & Cokg GmbH, Heimbach GmbH and Co KG filed Critical Helmbach & Cokg GmbH
Priority to ES08022241T priority Critical patent/ES2360568T3/es
Priority to AT08022241T priority patent/ATE504692T1/de
Priority to EP08022241A priority patent/EP2199458B1/fr
Priority to DE502008003137T priority patent/DE502008003137D1/de
Publication of EP2199458A1 publication Critical patent/EP2199458A1/fr
Application granted granted Critical
Publication of EP2199458B1 publication Critical patent/EP2199458B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths

Definitions

  • the invention relates to a forming fabric for dewatering a paper web in the sheet forming area of a paper machine, with a carrier web of a fabric, wire link belt and / or knitted fabric, placed on the paper web intended for the construction of the paper web transverse to the intended direction extending transverse threads at least partially spaced and without Incorporation are attached to the carrier web to her, the transverse threads between them drainage areas, which are continuous along the extension of the transverse threads in the plane thereof.
  • Forming screens are used in the sheet forming area of a paper machine. It is about 10m long and several meters wide, endless belts that are guided over rollers such that they form paper-side substantially flat surfaces.
  • a fiber pulp is applied to this surface or, in the case of a twin-wire former, a fiber pulp is injected between the two wires.
  • the sieve Under the influence of gravity and suction devices is dehydrated by the sieve (s), wherein the fibers formed by wire filaments form gradually to the paper web.
  • the then still very sensitive paper web is taken over by a press belt and then the press section for further drainage and finally the drying section supplied for thermal drying.
  • WO 2004/094719 A1 and WO 2005/001197 A1 remove.
  • knitted fabrics or wire-link belts can also be used as carriers (see FIG WO 99/41447 ) or combinations of woven, knitted fabric and / or wire link band.
  • a generic papermachine clothing which should also find use as a forming fabric. It has a carrier web which may be formed as a film, fine fabric or non-woven or combinations thereof. In one embodiment ( FIG. 1 ) are on the paper web side transverse threads and machine side longitudinal threads placed on the carrier web formed as a film and fixed to the carrier web by fusing, gluing or positive connection.
  • the additional thread layer layers formed thereby are intended to create a reinforcing structure with the aim of improving the dimensional stability of the carrier web.
  • filaments with a relatively large cross section between 0.5 and 10 mm in width are proposed for the filament scrims.
  • the distance between the longitudinal and transverse threads of the scrim is a multiple of the width. This is apparently done with the intent of the properties of the carrier web in particular with regard to fiber retention and drainage performance to disturb as little as possible by the additional threads.
  • Forming fabrics made of yarns have not become relevant in practice. Tissues are still used in which the best possible compromise between fiber retention on the one hand and drainage performance on the other hand is sought through variations in tissue structure.
  • the invention has for its object to provide a forming fabric that holds considerable improvements in terms of these two properties.
  • the basic idea of the invention is to arrange a transverse thread layer with relatively thin transverse threads on the paper side of the carrier web, but in such a high number that a pronounced transverse thread structure with small distances between the individual transverse threads results on the paper side.
  • a transverse thread width on the one hand and the high coverage of the carrier web on the other hand results in a cross-thread density, as they would not be reached by means of a fabric or knit, certainly not in a wire link belt. This causes an extremely good fiber retention.
  • a significant advantage of the invention is that in the construction of the carrier web no compromise must be made, since the fiber retention is taken over solely by the attached transverse threads.
  • the carrier web can therefore be optimized to achieve the highest possible dewatering performance, i.
  • the fabric structure can be made relatively simple and very open, which can also save costs. Accordingly, with the forming fabric according to the invention a clear separation of functions between the carrier web as a constituent element and the transverse thread layer as a fiber-supporting element is produced.
  • the transverse threads extend over the entire width of the carrier web, but at least across the width of the headbox.
  • the transverse threads may extend parallel to each other to obtain a uniform surface texture.
  • all transverse threads can be spaced from each other, preferably with a distance of at least 0.001 mm.
  • the transverse threads can run straight. However, this does not exclude other courses, for example a wave-shaped course. It is expedient that the transverse threads extend parallel to each other.
  • transverse threads need not extend at right angles to the direction of the Formieriebes, even if this is appropriate. You can also extend at an angle of 60 ° to 120 °, preferably from 85 ° to 95 ° to the direction of the Formiersiebes.
  • the distances between the transverse threads should be equal to one another.
  • the invention opens up the possibility of alternating groups of transverse threads with different distances and / or widths and / or cross-sectional geometries while observing the above boundary conditions. For example, threads with different diameters may follow alternately, but it is also possible for a certain number of threads with a first diameter, then a certain number of threads with a second diameter to follow one another in groups, the numbers also being the same or different could be. In that regard, the respective requirements can be taken into account as optimally as possible.
  • the width of the transverse threads should be at least 0.05 mm.
  • the upper limit of 0.49 mm should not be fully utilized, i. the width of the transverse threads is suitably in the range of 0.08 to 0.3 mm, preferably 0.08 to 0.15 mm.
  • the coverage of the carrier web by the transverse threads is advantageously more than 60%, preferably more than 2/3 of the total area of the carrier web, more preferably at least 75%. In order to obtain good drainage properties, it is expedient that the coverage is not greater than 90% of the total area of the carrier web.
  • the advantage of the forming fabric according to the invention in the design of the carrier web to be relatively free, can be used to give the paper side of the carrier web a longitudinal yarn structure, ie with the proportion of longitudinal yarns of the carrier web extending in the plane of the paper side of the carrier web , in the projection perpendicular to the plane of the carrier web, a surface coverage between 40% and 90%, preferably 50% to 70%, better still cause 60% to 65% of the total surface of the carrier web.
  • the attachment of the transverse threads on the carrier web should be punctiform, preferably only on longitudinal threads of the carrier web be to disturb as little as possible the drainage of the paper web by fixing the transverse threads.
  • the welding and the bonding both types of attachment can also be combined with each other.
  • Particularly advantageous is the welding by means of a laser beam, as has already been used in dry screens, consisting of pure thread layers, applied (see. EP 1 359 251 A1 ).
  • the transverse threads should have the property of absorbing laser energy and being able to be brought to melting temperature by absorbed laser energy at least at the surface. In this way, the transverse threads with the carrier web can be selectively welded under the action of a laser beam.
  • the laser-absorbing property of the transverse threads can be effected by a suitable additive which is incorporated into the transverse threads, be it distributed over the cross-section or only in the region of the lateral surface (cf. EP 1 359 251 A1 ).
  • a selective connection of the transverse threads on the carrier web can also take place using a preferably elastic adhesive. In this case, so little adhesive should be applied that there is no impairment of the drainage performance.
  • the carrier web consists of a single-layer or multi-layered woven and / or knitted fabric and / or of a wire link band which consists of a multiplicity of wire spirals which extend side by side transversely to the running direction and which are hingedly connected to one another via coupling wires (cf. EP 0 524 478 B1 ; DE 24 19 751 A1 ).
  • a wire link band which consists of a multiplicity of wire spirals which extend side by side transversely to the running direction and which are hingedly connected to one another via coupling wires (cf. EP 0 524 478 B1 ; DE 24 19 751 A1 ).
  • no further scrim is to be present except for the paper-side transverse thread layer.
  • the carrier web can be manufactured as an endless tube, either round woven or formed from narrow strips.
  • the drainage properties in the seam area are no different than the rest Area. Therefore, should also extend over the seam at least one transverse thread, if necessary, several transverse threads. If necessary, the transverse threads should also be made wider than the other transverse threads in order to achieve a permeability which is constant over the surface.
  • the transverse threads may have any cross section, expediently a round, but also a non-circular cross section. In the latter case, they may for example be oval, rectangular, square, hexagonal or star-shaped, with rounded edges, or have a different geometric cross-sectional shape.
  • the transverse threads are preferably monofilaments, but may also be twines or combinations thereof. As monofilaments also hollow monofilaments can be used, which can be adapted by pressure and heat in the form. The same applies to the threads of the carrier web.
  • monofilaments, multifilaments, threads or other thread forms, such as stranded or braided threads or combinations thereof may be used.
  • the above-mentioned cross-sectional shapes are also in question.
  • the plastic materials commonly used for forming fabrics are proposed, in particular PET, PBT, PA, PP, PPS or mixtures thereof.
  • This in FIG. 1 forming fabric 1 shown consists of a web formed as a web 2 and a force applied to the paper side 3 transverse thread layer 4th
  • the underlying four further longitudinal threads 11, 12, 13, 14 have a different course. They bind an upper transverse thread 7 on the paper side 3, pass through the interior of the carrier web 2 between a pair of adjacent transverse threads 7, 8 and tie the subsequent transverse thread 8 on the machine side of the carrier web 2 at the bottom before then again through the interior of the Carrier web 2 between an adjacent pair of transverse threads 7, 8 go and incorporate a subsequent upper transverse thread 7 at the top. In this way, the transverse thread layers 5, 6 are connected to each other. Two adjacent of these longitudinal threads 11, 12, 13, 14 are offset in the longitudinal direction (arrow A) of the forming fabric 1 by a respective transverse thread 7, 8.
  • the transverse thread layer 4 consists of a multiplicity of transverse threads-denoted by 15 by way of example-in this case a round cross-section which runs parallel to one another over the entire width of the carrier web 2 and has the same distances from each other.
  • the diameter corresponds to the width B of the transverse threads 15 in the projection perpendicular to the plane of the carrier web 2.
  • the distances are smaller than the diameter of the transverse threads 15, so that the cover of the carrier web 2 by the transverse threads 15 is higher than 50%.
  • the transverse threads 15 are formed as monofilaments and are straight and at right angles to the direction of the Formieriebes 1.
  • the attachment of the transverse threads 15 to the carrier web 2 is selectively at the floats on the paper side 3 longitudinal threads 9, 10 by welding or by adhesive.
  • FIG. 2 shows a further embodiment of a forming fabric 21 according to the invention.
  • the forming fabric 21 also consists of a carrier web 22, on the paper side 23, a transverse thread layer 24 is placed.
  • the carrier web 2 is formed as a double-layered fabric, which has an upper layer 25 with transverse threads - designated 26 by way of example - and a lower layer 27 with transverse threads - designated by way of example with 28 - has.
  • the transverse threads 26, 28 are monofilaments.
  • the transverse threads 26, 28 are bound by longitudinal threads 29, 30, 31, 32 of which only two longitudinal threads 29, 30 and 31, 32 are shown here on each side.
  • the carrier web 22 ends in end edges. At both end edges forms - viewed perpendicular to the plane of the drawing - each have a longitudinal thread 29 and 31 seam loops 36 and 37, while the respective underlying longitudinal threads 30, 32 form tight loops 38, 39 to an additional filling thread 40 and 41. All longitudinal threads 29, 30, 31, 32 are after training The seam loops 36, 37 and the tight loops 38, 39 weaved back into the fabric of the carrier web 2 and meet there - which is not shown here - on shortened ends of the respective adjacent longitudinal thread.
  • the seam loops 36, 37 serve to produce a plug wire seam. For this they are - as shown - brought into meshing overlap, so that a channel 42 is formed parallel to the end edges of the carrier web 22, through which a pintle 43 is inserted as a coupling. This results in an endless Formiersieb 21. By pulling the plug wire 43 from the channel 42, the connection of the end edges can be solved again. Regarding further details of this seam is on the EP 0 262 764 B1 Referenced.
  • transverse threads 45 are also present in the seam area.
  • the transverse thread 45 located perpendicularly above the pintle wire 43 is expediently connected only to the seam loops 36 on the left-hand end edge. In this way, the seam can be closed and also released again, without said transverse thread 45 being a hindrance.

Landscapes

  • Paper (AREA)
  • Knitting Of Fabric (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Medicinal Preparation (AREA)
EP08022241A 2008-12-22 2008-12-22 Toile de formage Not-in-force EP2199458B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES08022241T ES2360568T3 (es) 2008-12-22 2008-12-22 Tamiz de formación.
AT08022241T ATE504692T1 (de) 2008-12-22 2008-12-22 Formiersieb
EP08022241A EP2199458B1 (fr) 2008-12-22 2008-12-22 Toile de formage
DE502008003137T DE502008003137D1 (de) 2008-12-22 2008-12-22 Formiersieb

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08022241A EP2199458B1 (fr) 2008-12-22 2008-12-22 Toile de formage

Publications (2)

Publication Number Publication Date
EP2199458A1 true EP2199458A1 (fr) 2010-06-23
EP2199458B1 EP2199458B1 (fr) 2011-04-06

Family

ID=40459745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08022241A Not-in-force EP2199458B1 (fr) 2008-12-22 2008-12-22 Toile de formage

Country Status (4)

Country Link
EP (1) EP2199458B1 (fr)
AT (1) ATE504692T1 (fr)
DE (1) DE502008003137D1 (fr)
ES (1) ES2360568T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013104888U1 (de) 2013-10-31 2015-02-02 Heimbach Gmbh & Co. Kg Durchströmbare Bespannung für Papier- oder Zellstoffentwässerungsmaschinen sowie deren Verwendung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012100695U1 (de) 2012-02-29 2013-03-07 Heimbach Gmbh & Co. Kg Technisches Textilband

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1224629A (en) 1967-06-30 1971-03-10 Manfred Schoeller An endless screen for a paper-making machine
DE2419751A1 (de) 1974-04-24 1975-12-04 Kerber Hella Flaechige gebilde als drahtgliedergurt
EP0011977B1 (fr) 1978-11-30 1983-02-16 Albany International Corp. Procédé de fabrication d'un tissu et, à partir de celui-ci, d'une bande sans fin destinée à une machine à fabriquer du papier
EP0108733B1 (fr) 1982-11-02 1988-03-23 Nordiskafilt Ab Feutre comportant une jonction à boucle, à l'usage de la section de presse des machines à papier, et son procédé de fabrication
EP0262467B1 (fr) 1986-10-01 1990-07-04 Thomas Josef Heimbach GmbH & Co. Toile pour machine, en particulier feutre ou tamis pour papeterie
EP0262724B1 (fr) 1986-09-24 1993-09-01 Picanol N.V. Méthode pour détecter des fils de chaîne adhérés et métier à tisser utilisant cette méthode
EP0524478B1 (fr) 1991-07-10 1995-11-22 Thomas Josef Heimbach GmbH & Co. Tissu en hélices combinées
WO1999041447A1 (fr) 1998-02-14 1999-08-19 Scapa Group Plc Courroie poreuse ou toile filtrante
EP1209283A1 (fr) 2000-11-23 2002-05-29 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung Tissu, en particulier un tissu pour machine à papier
EP0925394B1 (fr) 1997-05-16 2003-03-19 Albany International Corp. Conception de couture pour toile secheuse
EP1357223A1 (fr) 2002-04-25 2003-10-29 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Toile pour machine à papier et son procédé de fabrication
EP1359251A1 (fr) 2002-04-25 2003-11-05 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Habillage de machine à papier et procédé de sa production
WO2004094719A1 (fr) 2003-04-18 2004-11-04 Albany International Corp. Tissu multicouche a deux systemes de chaine lies conjointement avec un triplet de fils de liage
WO2005001197A1 (fr) 2003-06-30 2005-01-06 Tamfelt Oyj Abp Tissu pour machine a papier
EP1362142B1 (fr) 2001-02-22 2006-06-07 Tamfelt Oyj Abp Toile synthetique de machine a papier
EP1719834A1 (fr) 2005-05-06 2006-11-08 Voith Patent GmbH Toile pour machine à papier

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1224629A (en) 1967-06-30 1971-03-10 Manfred Schoeller An endless screen for a paper-making machine
DE2419751A1 (de) 1974-04-24 1975-12-04 Kerber Hella Flaechige gebilde als drahtgliedergurt
EP0011977B1 (fr) 1978-11-30 1983-02-16 Albany International Corp. Procédé de fabrication d'un tissu et, à partir de celui-ci, d'une bande sans fin destinée à une machine à fabriquer du papier
EP0108733B1 (fr) 1982-11-02 1988-03-23 Nordiskafilt Ab Feutre comportant une jonction à boucle, à l'usage de la section de presse des machines à papier, et son procédé de fabrication
EP0262724B1 (fr) 1986-09-24 1993-09-01 Picanol N.V. Méthode pour détecter des fils de chaîne adhérés et métier à tisser utilisant cette méthode
EP0262467B1 (fr) 1986-10-01 1990-07-04 Thomas Josef Heimbach GmbH & Co. Toile pour machine, en particulier feutre ou tamis pour papeterie
EP0524478B1 (fr) 1991-07-10 1995-11-22 Thomas Josef Heimbach GmbH & Co. Tissu en hélices combinées
EP0925394B1 (fr) 1997-05-16 2003-03-19 Albany International Corp. Conception de couture pour toile secheuse
WO1999041447A1 (fr) 1998-02-14 1999-08-19 Scapa Group Plc Courroie poreuse ou toile filtrante
EP1209283A1 (fr) 2000-11-23 2002-05-29 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung Tissu, en particulier un tissu pour machine à papier
EP1362142B1 (fr) 2001-02-22 2006-06-07 Tamfelt Oyj Abp Toile synthetique de machine a papier
EP1357223A1 (fr) 2002-04-25 2003-10-29 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Toile pour machine à papier et son procédé de fabrication
EP1359251A1 (fr) 2002-04-25 2003-11-05 Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. Habillage de machine à papier et procédé de sa production
WO2004094719A1 (fr) 2003-04-18 2004-11-04 Albany International Corp. Tissu multicouche a deux systemes de chaine lies conjointement avec un triplet de fils de liage
WO2005001197A1 (fr) 2003-06-30 2005-01-06 Tamfelt Oyj Abp Tissu pour machine a papier
EP1719834A1 (fr) 2005-05-06 2006-11-08 Voith Patent GmbH Toile pour machine à papier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013104888U1 (de) 2013-10-31 2015-02-02 Heimbach Gmbh & Co. Kg Durchströmbare Bespannung für Papier- oder Zellstoffentwässerungsmaschinen sowie deren Verwendung

Also Published As

Publication number Publication date
ES2360568T3 (es) 2011-06-07
ATE504692T1 (de) 2011-04-15
DE502008003137D1 (de) 2011-05-19
EP2199458B1 (fr) 2011-04-06

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