EP2067895B1 - Forming fabric for use in a paper making machine - Google Patents

Forming fabric for use in a paper making machine Download PDF

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Publication number
EP2067895B1
EP2067895B1 EP07023458A EP07023458A EP2067895B1 EP 2067895 B1 EP2067895 B1 EP 2067895B1 EP 07023458 A EP07023458 A EP 07023458A EP 07023458 A EP07023458 A EP 07023458A EP 2067895 B1 EP2067895 B1 EP 2067895B1
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EP
European Patent Office
Prior art keywords
threads
longitudinal
forming screen
screen according
thread layer
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EP07023458A
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German (de)
French (fr)
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EP2067895A1 (en
Inventor
Rob Howarth
Ged Leigh
Derek Chaplin
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Heimbach GmbH and Co KG
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Heimbach GmbH and Co KG
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Application filed by Heimbach GmbH and Co KG filed Critical Heimbach GmbH and Co KG
Priority to PL07023458T priority Critical patent/PL2067895T3/en
Priority to AT07023458T priority patent/ATE507346T1/en
Priority to EP07023458A priority patent/EP2067895B1/en
Priority to DE502007007082T priority patent/DE502007007082D1/en
Priority to ES07023458T priority patent/ES2360823T3/en
Priority to ZA200810217A priority patent/ZA200810217B/en
Priority to RU2008147760/12A priority patent/RU2384662C1/en
Priority to CA2645700A priority patent/CA2645700C/en
Priority to KR1020080121750A priority patent/KR101150790B1/en
Priority to US12/328,025 priority patent/US20090139679A1/en
Priority to CN2008101788806A priority patent/CN101451316B/en
Publication of EP2067895A1 publication Critical patent/EP2067895A1/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
    • D21H23/06—Controlling the addition
    • D21H23/14—Controlling the addition by selecting point of addition or time of contact between components
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper

Definitions

  • the invention relates to a forming fabric for use in the forming of a paper machine with a paper and a machine side and extending in the intended direction longitudinal yarns and transverse to extending transverse yarns, wherein the longitudinal yarns in the number-of-yarn ratio of 1: 1 in a machine-side longitudinal yarn layer and a paper-side longitudinal thread layer are divided and embed the binding cross threads in both longitudinal thread layers.
  • Forming screens are used in the sheet forming area of a paper machine. It is about several tens of meters long and several meters wide, endless fabric belts that are guided over rollers such that they form a substantially flat surface on top. On this surface, a fiber pulp is fed to the beginning of the running path, which is dewatered down through the forming fabric, while the fibers attach to the top of the forming fabric and thus form a paper web. At the end of the Formiersiebes is then still very sensitive Paper web taken from a press belt and then fed to the press section for further drainage and the Trockepartie purposes of thermal drying.
  • the present invention relates to a type of fabric in which the longitudinal threads are warp threads and are arranged in two longitudinal thread layers with the thread count ratio 1: 1 arranged one above the other longitudinal threads.
  • Such Formiersiebe are for example from the EP 1 362 142 B1 , of the WO 2004/094719 A1 and the WO 2005/001197 A1 known.
  • the connection of the longitudinal thread layers is done via binding cross threads, which integrate both in the machine side and in the paper-side longitudinal thread layer.
  • binding cross threads which integrate both in the machine side and in the paper-side longitudinal thread layer.
  • other transverse threads may be present, which incorporate exclusively in the paper-side longitudinal thread layer and / or exclusively in the machine-side longitudinal thread layer.
  • the aforementioned type of fabric is characterized by a good compromise between the conflicting demands for on the one hand good fiber support - in the EP 1 362 142 B1
  • an FSI value of 185 or 188 is specified - and on the other hand, high drainage performance.
  • WO 2006/034576 A1 WO 01/27385 A1 ; EP 0 998 607 B1 ; WO 2004/013410 A1
  • even lower length fill levels are specified (cf. US 4,314,589 ; EP 0010 311 ; US 4,379,735 ), although this type of tissue is not comparable with the generic type of tissue in this respect.
  • non-generic types of tissue air permeabilities between 7 500 to 10 500 m 3 / m 2 / h (WO 2004/013410 A1) and 3 500 to 8 200 m 3 / m m / h (see. WO 01/27385 A1 ) achieved.
  • the invention is therefore based on the object, a forming fabric in such a way that at the end of the forming fabric, a paper web is obtained, which has a higher strength and a lower degree of moisture.
  • this object is achieved by a forming fabric which has a fiber subservience index (FSI) which is in the range from 230 to 250 and has an air permeability which, measured at 100 Pa in each case, lies in the range from 5700 to 10,600 m 3 / m 2 / h (corresponding to 350-650 cfm, measured at 127 Pa), preferably in the range 6500 to 8200 m 3 / m 2 / h (corresponding to 400-500 cfm, measured at 127 Pa).
  • FSI fiber subservience index
  • the basic idea of the invention is therefore to design the fabric structure of the forming fabric in such a way that excellent fiber support is achieved while maintaining strength and despite very high air permeability and thus dewatering effect, so that only a small proportion of fibers is lost during dewatering and one over the Surface uniform paper web relatively good strength forms. It should be noted that not only the number of longitudinal and transverse threads per cm is included in the calculation of the fiber support index, but also two coefficients, which depend on the type of integration of the longitudinal and transverse threads and their contribution to the fiber support, ie the fiber support index indirectly also says something about the fabric construction of the forming fabric.
  • coefficients a and b depend on the weave and can be taken from a table included in the pre-cited document.
  • Air permeability is also measured as indicated in the document cited using differential pressures of 100 and 127 Pa, respectively (see above).
  • the distribution of longitudinal and transverse threads is such that there are on the paper side between 1200 and 1600 flow openings per cm of surface of the forming fabric.
  • the course of the thread and the structure of the thread should be such that the through-openings have a rectangular shape with a ratio of the extent in the longitudinal direction to the extension in the transverse direction of 1: 1.8 to 1: 3.4. In this way, there is a good drainage effect with high fiber retention.
  • the degree of filling of the longitudinal threads in the paper-side longitudinal thread layer is at most 32% in order to achieve a high degree of openness in this longitudinal thread layer.
  • the degree of filling of the longitudinal threads should be a maximum of 90%, preferably a maximum of 85% and thus significantly lower than in the prior art forming fabrics of this genus.
  • the diameter of the longitudinal threads at least in the paper-side longitudinal thread layer is in the range of 0.08 to 0.12 mm, preferably 0.11 mm, and the diameter of the longitudinal threads in the machine-side longitudinal thread layer preferably in Range of 0.15 or 0.25 mm. Because of this comparatively small diameter of the longitudinal threads, in particular in the paper-side length of the thread layer, a low degree of fullness can nevertheless be achieved realize specific number of threads, ie you get a relatively open, but still providing a good fiber retention tissue.
  • the longitudinal threads should be made of a high-strength plastic, for example PET (polyethylene terephthalate) having an intrinsic viscosity (IV) of at least 0.8 dl / g and a modulus of elasticity of at least 10 N / mm 2 and / or PEN (polyethylene naphthalate).
  • PET polyethylene terephthalate
  • IV intrinsic viscosity
  • PEN polyethylene naphthalate
  • a good compromise between dewatering effect on the one hand and fiber retention on the other hand is achieved when the number of longitudinal threads in the range of 50 to 60 threads per cm in the transverse direction. in terms of the number of transverse threads, it should be in the range of 100 to 110 threads per cm in the longitudinal direction.
  • a forming fabric according to the invention as far as the transverse yarns are concerned - can be realized solely with transverse binding yarns, that is to say with (first) transverse yarns which integrate into both longitudinal yarn layers and thus establish a connection between these layers.
  • the fiber retention can be improved if, in addition, second transverse threads are present, which are exclusively incorporated into the paper-side longitudinal thread layer and expediently alternate with the binding transverse threads in a specific regular mode.
  • the second transverse threads should be taken alone Create plain weave with the longitudinal threads of the paper-side longitudinal thread layer.
  • the binding transverse threads are arranged side by side in groups of at least two binding transverse threads, wherein one of the binding transverse threads binds into the machine-side longitudinal thread layer if the other binding transverse thread or the other binding transverse threads binds or bind in the paper-side longitudinal thread layer.
  • the binding cross threads should therefore be offset in the transverse direction of the forming fabric. However, they each have the same repeat, so bind in the same way both in the machine side and in the paper-side longitudinal thread position.
  • the respectively adjacent binding transverse threads with their repeat should be inserted into the paper-side longitudinal thread layer in such a way that their binding patterns in the transverse direction - ie along their extent - complement each other completely, preferably in such a way that the complementary embeddings result in a pattern on the paper side corresponding to that of the optionally existing second transverse threads corresponds, for example, also give a kind of plain weave.
  • the binding transverse threads bind in the machine-side longitudinal thread layer within a repeat with fewer longitudinal threads than in the paper-side longitudinal thread layers, preferably incorporate with no more than two longitudinal threads in the machine-side longitudinal thread layer.
  • the binding transverse threads within a repeat suitably bind with more than three longitudinal threads.
  • third transverse threads are present, which integrate exclusively into the machine-side longitudinal thread layer. They are intended in particular to provide wear volume on the machine side of the forming fabric in favor of the protection of the longitudinal yarns in the machine-side longitudinal yarn layer.
  • the third transverse threads float on the outside of the machine-side longitudinal thread layer over a plurality of longitudinal threads, wherein in each case the number of these longitudinal threads is greater than the number of longitudinal threads with which integrate the third transverse threads between two floats.
  • the floats should go over at least three, more preferably at least five longitudinal threads. Between the floats an integration with a single longitudinal thread of the machine-side longitudinal thread layer is sufficient.
  • the forming fabric 1 is a double-layered fabric with an upper, paper-side longitudinal thread layer 2 and a lower, machine-side longitudinal thread layer 3.
  • Both longitudinal thread layers 2, 3 are of longitudinal or warp threads - by way of example denoted by 4 or 5 - in the thread number ratio of 1: 1, wherein in each case one longitudinal thread 4 of the paper-side longitudinal thread layer 2 is arranged exactly above a longitudinal thread 5 in the machine-side longitudinal thread layer 3, the longitudinal threads 4, 5 are thus in pairs above one another.
  • the diameter of the longitudinal threads 4 in the paper-side longitudinal thread layer 2 is 0.11 mm and the diameter of the longitudinal threads 5 in the machine-side longitudinal thread layer 3 0.18 mm. They consist of PEN. The number of longitudinal threads is 58 per cm in the transverse direction.
  • second transverse threads 6, 7 are integrated with the longitudinal threads 4 of this longitudinal thread layer 2 to form a plain weave. Perpendicular to the drawing plane each adjacent second transverse threads 6, 7 follow each other.
  • the second Cross threads 6, 7 are made of PET, and they have a diameter of 0.11 mm.
  • the third transverse threads 8 each form over five longitudinal threads 5 going floats - exemplified with 9 - on the machine side of the forming fabric 1 and then bind each with a single longitudinal thread 5 a.
  • the floats 9 represent abrasion material for the protection of the machine-side longitudinal thread layer 3, which is highly stressed by tension.
  • the diameter of the third longitudinal threads is 0.22 mm.
  • the material can be PET and / or PAM.
  • the longitudinal thread layers 2, 3 are joined by pairs of two binding transverse threads 10, 11, each adjacent to one another in the longitudinal direction. They have a diameter of 0.11 mm and are made of PET. They bind in the paper-side longitudinal thread layer 2 successively alternately above and below with longitudinal threads 4, then extend between the two longitudinal thread layers 2, 3 over three longitudinal threads 4 and 5 and then tie with a single longitudinal thread 5 in the machine-side longitudinal thread layer 3, before then float them again between the two longitudinal thread layers 2 and 3. They each have the same binding repeat, but are shifted to each other in the transverse direction - ie in the longitudinal direction - that the Binding pattern in the paper-side longitudinal thread layer 2 complement so that they together form a canvas pattern analogous to the second transverse threads 6, 7. In this way arises on the paper side of the forming fabric 1, a nearly uniform canvas pattern that provides a high fiber retention.
  • the degree of filling of the paper-side longitudinal thread layer 2 is 31%, the total degree of filling of the longitudinal threads 4, 5 82%.
  • the number of transverse threads is 108 per cm in the longitudinal direction of the forming wire 1. This results in a high openness and thus a good drainage effect despite high fiber retention.

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  • Paper (AREA)
  • Making Paper Articles (AREA)
  • Woven Fabrics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The screen (1) has longitudinal threads (4, 5) divided in the ratio of number of threads in a longitudinal thread layer (3) on a machine side and a thread layer (2) on a paper side. Binding cross threads (10, 11) are bound in the thread layers (2, 3). Fiber support index (FSI) of the screen ranges between 230 to 250, and rectangular shaped flow-through openings are formed on the paper side. Diameter of the threads in the longitudinal thread layer on the machine side ranges between 0.15 to 0.25 millimeter. A part of the threads consists of polyethylene terephthalate (PET) material. Air permeability of the screen ranges between 5700 to 10600 meter cube or meter square/hour. The total fill degree of the longitudinal threads is 85 percent.

Description

Die Erfindung betrifft ein Formiersieb für den Einsatz im Formierbereich einer Papiermaschine mit einer Papier- und einer Maschinenseite sowie mit sich in der vorgesehenen Laufrichtung erstreckenden Längsfäden und mit sich quer dazu erstreckenden Querfäden, wobei die Längsfäden im Fadenanzahlverhältnis von 1:1 in eine maschinenseitige Längsfadenlage und eine papierseitige Längsfadenlage aufgeteilt sind und die Bindequerfäden in beide Längsfadenlagen einbinden.The invention relates to a forming fabric for use in the forming of a paper machine with a paper and a machine side and extending in the intended direction longitudinal yarns and transverse to extending transverse yarns, wherein the longitudinal yarns in the number-of-yarn ratio of 1: 1 in a machine-side longitudinal yarn layer and a paper-side longitudinal thread layer are divided and embed the binding cross threads in both longitudinal thread layers.

Formiersiebe werden im Blattbildungsbereich einer Papiermaschine eingesetzt. Es handelt sich um mehrere Zehn-Meter lange und mehrere Meter breite, endlose Gewebebänder, die über Walzen derart geführt werden, dass sie obenseitig eine im wesentlichen ebene Fläche ausbilden. Auf diese Fläche wird zum Beginn des Laufweges eine Faserpulpe aufgegeben, die durch das Formiersieb nach unten entwässert wird, während die Fasern an der Oberseite des Formiersiebes anlagern und so eine Papierbahn formen. Am Ende des Formiersiebes wird die dann noch sehr empfindliche Papierbahn von einem Pressenband übernommen und dann der Pressenpartie zwecks weiterer Entwässerung und der Trockepartie zwecke thermischer Trocknung zugeführt.Forming screens are used in the sheet forming area of a paper machine. It is about several tens of meters long and several meters wide, endless fabric belts that are guided over rollers such that they form a substantially flat surface on top. On this surface, a fiber pulp is fed to the beginning of the running path, which is dewatered down through the forming fabric, while the fibers attach to the top of the forming fabric and thus form a paper web. At the end of the Formiersiebes is then still very sensitive Paper web taken from a press belt and then fed to the press section for further drainage and the Trockepartie purposes of thermal drying.

Für den Gewebeaufbau von Formiersieben sind eine Vielzahl verschiedenartiger Gewebekonstruktionen vorgeschlagen worden. Die vorliegende Erfindung betrifft einen Gewebetyp, bei dem die Längsfäden Kettfäden sind und in zwei Längsfadenlagen mit im Fadenanzahlverhältnis 1:1 übereinander angeordneten Längsfäden angeordnet sind. Solche Formiersiebe sind beispielsweise aus der EP 1 362 142 B1 , der WO 2004/094719 A1 und der WO 2005/001197 A1 bekannt. Die Verbindung der Längsfadenlagen geschieht über Bindequerfäden, die sowohl in die maschinenseitige als auch in die papierseitige Längsfadenlage einbinden. Neben diesen Bindequerfäden können auch weitere Querfäden vorhanden sein, die ausschließlich in die papierseitige Längsfadenlage und/oder ausschließlich in die maschinenseitige Längsfadenlage einbinden. Der vorgenannte Gewebetyp zeichnet sich durch einen guten Kompromiss zwischen den sich einander widersprechenden Forderungen nach einerseits guter Faserunterstützung - in der EP 1 362 142 B1 wird hierzu ein FSI-Wert von 185 bzw. 188 angegeben - und andererseits hoher Entwässerungsleistung aus.For fabric construction of forming fabrics, a variety of different fabric constructions have been proposed. The present invention relates to a type of fabric in which the longitudinal threads are warp threads and are arranged in two longitudinal thread layers with the thread count ratio 1: 1 arranged one above the other longitudinal threads. Such Formiersiebe are for example from the EP 1 362 142 B1 , of the WO 2004/094719 A1 and the WO 2005/001197 A1 known. The connection of the longitudinal thread layers is done via binding cross threads, which integrate both in the machine side and in the paper-side longitudinal thread layer. In addition to these Bindequerfäden also other transverse threads may be present, which incorporate exclusively in the paper-side longitudinal thread layer and / or exclusively in the machine-side longitudinal thread layer. The aforementioned type of fabric is characterized by a good compromise between the conflicting demands for on the one hand good fiber support - in the EP 1 362 142 B1 For this purpose, an FSI value of 185 or 188 is specified - and on the other hand, high drainage performance.

Grundsätzlich werden Formiersiebe heutzutage aus als Monofilamente ausgebildeten Kunststofffäden hergestellt. Dabei setzen sich immer mehr hochfeste Kunststoffe durch, um bei gleicher Festigkeit insbesondere in der Längsrichtung geringere Fadendurchmesser und damit einen niedrigeren Längsfadenfüllgrad und folglich eine höhere Durchlässigkeit verwirklichen zu können (vgl. WO 03/046277 A1 bei einem gattungsfremden Formiersieb mit zwei Querfadenlagen und Bindekettfäden). Bei diesem Gewebetyp liegt der Längsfadenfüllgrad in der Regel bei mindestens 100%, teilweise weit darüber (vgl. WO 2006/034576 A1 ; WO 01/27385 A1 ; EP 0 998 607 B1 ; WO 2004/013410 A1 ), und zwar trotz Verwendung hochfester Längs- bzw. Kettfäden. Teilweise werden auch geringere Längefandenfüllgrade angegebenen (vgl. US 4 314 589 ; EP 0010 311 ; US 4 379 735 ), wobei allerdings diese Gewebeart mit der gattungsgemäßen Gewebeart insoweit nicht vergleichbar ist. Bei den gattungsfremden Gewebearten werden Luftdurchlässigkeiten zwischen 7 500 bis 10 500 m3/m2/h (WO 2004/013410 A1) bzw. 3 500 bis 8 200 m3/mm/h (vgl. WO 01/27385 A1 ) erzielt.Basically, forming fabrics today are made from plastic filaments formed as monofilaments. In the process, more and more high-strength plastics are gaining acceptance in order to achieve the same strength, especially in the longitudinal direction smaller thread diameter and thus a lower Längsfadenfüllgrad and consequently a higher permeability to be able to realize (see. WO 03/046277 A1 in a non-generic forming fabric with two transverse thread layers and binding warp threads). In this type of fabric, the Längsfadenfüllgrad is usually at least 100%, sometimes far above (see. WO 2006/034576 A1 ; WO 01/27385 A1 ; EP 0 998 607 B1 ; WO 2004/013410 A1 ), despite the use of high-strength longitudinal or warp threads. In some cases, even lower length fill levels are specified (cf. US 4,314,589 ; EP 0010 311 ; US 4,379,735 ), although this type of tissue is not comparable with the generic type of tissue in this respect. In the non-generic types of tissue air permeabilities between 7 500 to 10 500 m 3 / m 2 / h (WO 2004/013410 A1) and 3 500 to 8 200 m 3 / m m / h (see. WO 01/27385 A1 ) achieved.

Trotz der zwischenzeitlich erreichten Fortschritte besteht nach wie vor Verbesserungsbedarf, um den Wirkungsgrad von Formiersieben in Bezug auf deren Faserunterstützungseigenschaft einerseits und Entwässerungsleistung andererseits zu erhöhen und damit am Ende des Formiersiebes eine Papierbahn zu erhalten, die einen geringen Feuchtegrad und eine hohe Faserdichte und damit Festigkeit hat. Solche Verbesserungen haben zur Folge, dass die nachfolgenden Sektionen der Papiermaschine entlastet oder hohe Trockengrade erzielt und Papierabrisse vermieden werden. Der Erfindung liegt folglich die Aufgabe zugrunde, ein Formiersieb derart auszubilden, dass am Ende des Formiersiebes eine Papierbahn erhalten wird, die eine höhere Festigkeit und einen geringeren Feuchtegrad hat.Despite the progress achieved in the meantime, there is still room for improvement in order to increase the efficiency of forming fabrics in terms of their fiber support property on the one hand and dewatering performance on the other and thus to obtain a paper web at the end of the forming fabric which has a low moisture content and high fiber density and thus strength , Such improvements have the consequence that the subsequent sections of the paper machine relieved or high dryness achieved and paper breaks are avoided. The invention is therefore based on the object, a forming fabric in such a way that at the end of the forming fabric, a paper web is obtained, which has a higher strength and a lower degree of moisture.

Diese Aufgabe wird erfingdungsgemäß durch ein Formiersieb gelöst, das einen Faserunteretützungsindex (FSI) aufweist, der im Bereich von 230 bis 250 liegt, und eine Luftdurchlässigkeit hat, die - jeweils bei 100 Pa gemessen - im Bereich von 5700 bis 10600 m3/m2/h (entsprechend 350 - 650 cfm, gemessen bei 127 Pa), vorzugsweise im Bereich 6500 bis 8200 m3/m2/h (entsprechend 400 - 500 cfm, gemessen bei 127 Pa) liegt. Grundgedanke der Erfindung ist es also, den Gewebeaufbau des Formiersiebes derart zu gestalten, dass bei gleichbleibender Festigkeit und trotz sehr hoher Luftdurchlässigkeit und damit Entwässerungswirkung eine hervorragende Faserunterstützung erzielt wird, so dass bei der Entwässerung nur ein geringer Anteil von Fasern verlorengeht und sich eine über die Fläche gleichmäßige Papierbahn relativ guter Festigkeit ausbildet. Dabei ist zu berücksichtigen, dass in die Berechnung des Faserunterstüzungsindexes nicht nur die Anzahl der Längs- und Querfäden pro cm eingeht, sondern auch zwei Koeffizienten, die von der Art der Einbindung der Längs- und Querfäden und ihrer Beiträge zur Faserunterstützung abhängen, d.h. der Faserunterstützungsindex besagt mittelbar auch etwas über den gewebetechnischen Aufbau des Formiersiebes.According to the invention, this object is achieved by a forming fabric which has a fiber subservience index (FSI) which is in the range from 230 to 250 and has an air permeability which, measured at 100 Pa in each case, lies in the range from 5700 to 10,600 m 3 / m 2 / h (corresponding to 350-650 cfm, measured at 127 Pa), preferably in the range 6500 to 8200 m 3 / m 2 / h (corresponding to 400-500 cfm, measured at 127 Pa). The basic idea of the invention is therefore to design the fabric structure of the forming fabric in such a way that excellent fiber support is achieved while maintaining strength and despite very high air permeability and thus dewatering effect, so that only a small proportion of fibers is lost during dewatering and one over the Surface uniform paper web relatively good strength forms. It should be noted that not only the number of longitudinal and transverse threads per cm is included in the calculation of the fiber support index, but also two coefficients, which depend on the type of integration of the longitudinal and transverse threads and their contribution to the fiber support, ie the fiber support index indirectly also says something about the fabric construction of the forming fabric.

Der Faserunterstützungsindex berechnet sich entsprechend der Veröffentlichung "Approved Standard Meaeuring Method" der Papier-machine Clothing Association, 19, rue de la République, 45000 Orléans/France, vom Juni 2004 nach folgender Formel: FSI = 1 , 693 a x Nm + 2 x b x Nc ,

Figure imgb0001

wobei
a - Koeffizient für den Unterstützungsbeitrag der Längsfäden;
Nm = Anzahl der Längsfäden pro cm in Querrichtung auf der Papierseite des Formiersiebes;
b = Koeffizient für den Unterstützungebeitrag der Querfäden;
Nc = Anzahl der Querfäden pro cm in Längsrichtung auf der Papierseite des Formiersiebes.The fiber support index is calculated according to the publication "Approved Standard Meauring Method" of the Papier-Machine Clothing Association, 19, rue de la République, 45000 Orléans / France, June 2004 according to the following formula: FSI = 1 . 693 ax Nm + 2 xbx Nc .
Figure imgb0001
in which
a - coefficient for the contribution of longitudinal yarns;
Nm = number of longitudinal threads per cm in the transverse direction on the paper side of the forming fabric;
b = coefficient for the contribution of the transverse threads;
Nc = number of transverse threads per cm in the longitudinal direction on the paper side of the forming fabric.

Die Koeffizienten a und b hängen von der Webart ab und können einer Tabelle entnommen werden, die in dem vorzitierten Dokument enthalten ist.The coefficients a and b depend on the weave and can be taken from a table included in the pre-cited document.

Die Luftdurchlässigkeit wird ebenfalls nach den Angaben in dem vorzitierten Dokument unter Anwendung eines Differentialdrucke von 100 bzw. 127 Pa gemessen (s.o.).Air permeability is also measured as indicated in the document cited using differential pressures of 100 and 127 Pa, respectively (see above).

In Ausbildung der Erfindung ist vorgesehen, dass die Verteilung von Längs- und Querfäden so beschaffen ist, dass auf der Papierseite 1200 bis 1600 Durchflussöffnungen pro cm Fläche des Formiersiebes vorhanden sind. Fadenverlauf und Fadenstruktur sollten dabei so sein, dass die Durchflussöffnungen Rechteckform mit jeweils einem Verhältnis der Erstreckung in Längsrichtung zur Erstreckung in Querrichtung von 1:1,8 bis 1:3,4 haben. Auf diese Weise ergibt sich eine gute Entwässerungswirkung bei hoher Faserretention.In an embodiment of the invention, it is provided that the distribution of longitudinal and transverse threads is such that there are on the paper side between 1200 and 1600 flow openings per cm of surface of the forming fabric. The course of the thread and the structure of the thread should be such that the through-openings have a rectangular shape with a ratio of the extent in the longitudinal direction to the extension in the transverse direction of 1: 1.8 to 1: 3.4. In this way, there is a good drainage effect with high fiber retention.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, dass der Füllgrad der Längsfäden in der papierseitigen Längsfadenlage maximal 32% beträgt, um in dieser Längsfadenlage eine hohe Offenheit zu erreichen. Insgesamt sollte der Füllgrad der Längsfäden maximal 90%, vorzugsweise maximal 85% betragen und damit deutlich niedriger liegen als bei den vorbekannten Formiersieben dieser Gattung.According to a further feature of the invention, it is provided that the degree of filling of the longitudinal threads in the paper-side longitudinal thread layer is at most 32% in order to achieve a high degree of openness in this longitudinal thread layer. Overall, the degree of filling of the longitudinal threads should be a maximum of 90%, preferably a maximum of 85% and thus significantly lower than in the prior art forming fabrics of this genus.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, dass der Durchmesser der Längsfäden zumindest in der papierseitigen Längsfadenlage im Bereich von 0,08 bis 0,12 mm liegt, vorzugsweise 0,11 mm beträgt, und der Durchmesser der Längsfäden in der maschinenseitigen Längsfadenlage vorzugsweise im Bereich von 0,15 bzw. 0,25 mm liegt. Aufgrund dieser vergleichsweise geringen Durchmesser der Längsfäden insbesondere in der papierseitigen Längefadenlage lässt sich ein geringer Fullgrad bei gleichwohl hoher spezifischer Fadenanzahl verwirklichen, d.h. man erhält ein relativ offenes, jedoch immer noch eine gute Faserretention bereitstellendes Gewebe. Um trotz der geringen Durchmesser hohen Festigkeitsanforderungen genügen zu können, sollten die Längsfäden aus einem hochfesten Kunststoff bestehen, beispielsweise aus PET (Polyethylenterephthalat) mit einer Grenzviskosität (IV) von mindestens 0,8 dl/g und einem Elastizitätsmodul von wenigstens 10 N/mm2 und/oder aus PEN (Polyethylennaphthalat) bestehen.According to a further feature of the invention, it is provided that the diameter of the longitudinal threads at least in the paper-side longitudinal thread layer is in the range of 0.08 to 0.12 mm, preferably 0.11 mm, and the diameter of the longitudinal threads in the machine-side longitudinal thread layer preferably in Range of 0.15 or 0.25 mm. Because of this comparatively small diameter of the longitudinal threads, in particular in the paper-side length of the thread layer, a low degree of fullness can nevertheless be achieved realize specific number of threads, ie you get a relatively open, but still providing a good fiber retention tissue. In order to satisfy high strength requirements despite the small diameter, the longitudinal threads should be made of a high-strength plastic, for example PET (polyethylene terephthalate) having an intrinsic viscosity (IV) of at least 0.8 dl / g and a modulus of elasticity of at least 10 N / mm 2 and / or PEN (polyethylene naphthalate).

Ein guter Kompromiss zwischen Entwässerungswirkung einerseits und Faserretention andererseits wird dann erzielt, wenn die Anzahl der Längsfäden im Bereich von 50 bis 60 Fäden pro cm in Querrichtung liegt. was die Anzahl der Querfäden betrifft, sollte sie im Bereich von 100 bis 110 Fäden pro cm in Längsrichtung liegen.A good compromise between dewatering effect on the one hand and fiber retention on the other hand is achieved when the number of longitudinal threads in the range of 50 to 60 threads per cm in the transverse direction. in terms of the number of transverse threads, it should be in the range of 100 to 110 threads per cm in the longitudinal direction.

Grundsätzlich kann ein erfindungsgemäßes Formiersieb - was die Querfäden betrifft - allein mit Bindequerfäden verwirklicht werden, also mit solchen (ersten) Querfäden, die in beide Längsfadenlagen einbinden und so eine verbindung zwischen diesen Lagen herstellen. Die Faserretention lässt sich jedoch verbessern, wenn zusätzlich zweite Querfäden vorhanden sind, die ausschließlich in die papierseitige Längsfadenlage eingebunden sind und sich zweckmäßigerweise mit den Bindequerfäden in einem bestimmten regelmäßigen Modus abwechseln. Vorzugsweise sollten die zweiten Querfäden für sich genommen eine Leinwandbindung mit den Längsfäden der papierseitigen Längsfadenlage bilden.In principle, a forming fabric according to the invention - as far as the transverse yarns are concerned - can be realized solely with transverse binding yarns, that is to say with (first) transverse yarns which integrate into both longitudinal yarn layers and thus establish a connection between these layers. However, the fiber retention can be improved if, in addition, second transverse threads are present, which are exclusively incorporated into the paper-side longitudinal thread layer and expediently alternate with the binding transverse threads in a specific regular mode. Preferably, the second transverse threads should be taken alone Create plain weave with the longitudinal threads of the paper-side longitudinal thread layer.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, dass die Bindequerfäden zu Gruppen von wenigstens zwei Bindequerfäden nebeneinander angeordnet sind, wobei einer der Bindequerfäden in die maschinenseitige Längsfadenlage einbindet, wenn der andere Bindequerfaden bzw. die anderen Bindequerfäden in der papierseitigen Längsfadenlage einbindet bzw. einbinden. Innerhalb der Gruppen von nebeneinander liegenden Bindequerfäden sollen die BindeQuerfäden also in Querrichtung des Formiersiebes gegeneinander versetzt verlaufen. Sie haben jedoch jeweils den gleichen Rapport, binden also in gleicher Weise sowohl in die maschinenseitige als auch in die papierseitige Längsfadenlage ein. Vorzugsweise sollten die jeweils benachbarten Bindequerfäden mit ihrem Rapport derart verschoben in die papierseitige Längsfadenlage einbinden, dass sich ihre Bindemuster in Querrichtung - also längs ihrer Erstreckung - lückenlos ergänzen, vorzugsweise so, dass die sich ergänzenden Einbindungen ein Muster auf der Papierseite ergeben, das dem der gegebenenfalls vorhandenen zweiten Querfäden entspricht, beispielsweise ebenfalls eine Art Leinwandbindung ergeben.According to a further feature of the invention, it is provided that the binding transverse threads are arranged side by side in groups of at least two binding transverse threads, wherein one of the binding transverse threads binds into the machine-side longitudinal thread layer if the other binding transverse thread or the other binding transverse threads binds or bind in the paper-side longitudinal thread layer. Within the groups of juxtaposed binding transverse threads, the binding cross threads should therefore be offset in the transverse direction of the forming fabric. However, they each have the same repeat, so bind in the same way both in the machine side and in the paper-side longitudinal thread position. Preferably, the respectively adjacent binding transverse threads with their repeat should be inserted into the paper-side longitudinal thread layer in such a way that their binding patterns in the transverse direction - ie along their extent - complement each other completely, preferably in such a way that the complementary embeddings result in a pattern on the paper side corresponding to that of the optionally existing second transverse threads corresponds, for example, also give a kind of plain weave.

Für die Faserunterstützung ist es ebenfalls von Vorteil, wenn die Bindequerfäden in die maschinenseitige Längsfadenlage innerhalb eines Rapports mit weniger Längsfäden binden als in der papierseitige Längsfadenlagen, vorzugsweise mit nicht mehr als zwei Längsfäden in die maschinenseitigen Längsfadenlage einbinden. In der papierseitigen Längsfadenlage binden die Bindequerfäden innerhalb eines Rapports zweckmäßigerweise mit mehr als drei Längsfäden.It is also advantageous for the fiber support if the binding transverse threads bind in the machine-side longitudinal thread layer within a repeat with fewer longitudinal threads than in the paper-side longitudinal thread layers, preferably incorporate with no more than two longitudinal threads in the machine-side longitudinal thread layer. In the paper-side longitudinal thread layer, the binding transverse threads within a repeat suitably bind with more than three longitudinal threads.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, dass dritte Querfäden vorhanden sind, die ausschließlich in die maschinenseitige Längsfadenlage einbinden. Sie sollen insbesondere dazu dienen, an der Maschinenseite des Formiersiebes verschleißvolumen zu Gunsten der Schonung der zugbeanspruchten Längsfäden in der maschinenseitigen Längsfadenlage zur Verfügung zu stellen. Hierzu ist es zweckmäßig, wenn die dritten Querfäden auf der Außenseite der maschinenseitigen Längsfadenlage über mehrere Längsfäden flottieren, wobei jeweils die Anzahl dieser Längsfäden größer ist als die Anzahl der Längsfäden, mit denen die dritten Querfäden zwischen zwei Flottierungen einbinden. Vorzugsweise sollten die Flottierungen über zumindest drei, besser noch zumindest fünf Längsfäden gehen. Zwischen den Flottierungen reicht eine Einbindung mit einem einzigen Längsfaden der maschinenseitigen Längsfadenlage.According to a further feature of the invention, it is provided that third transverse threads are present, which integrate exclusively into the machine-side longitudinal thread layer. They are intended in particular to provide wear volume on the machine side of the forming fabric in favor of the protection of the longitudinal yarns in the machine-side longitudinal yarn layer. For this purpose, it is expedient if the third transverse threads float on the outside of the machine-side longitudinal thread layer over a plurality of longitudinal threads, wherein in each case the number of these longitudinal threads is greater than the number of longitudinal threads with which integrate the third transverse threads between two floats. Preferably, the floats should go over at least three, more preferably at least five longitudinal threads. Between the floats an integration with a single longitudinal thread of the machine-side longitudinal thread layer is sufficient.

Mit sämtlichen Bereichsangaben sowohl in der Beschreibung als auch in den Ansprüchen sind auch diejenigen werte gemeint und damit offenbart, die zwischen den jeweils angegebenen Grenzwerten für die Bereiche liegen. Sie werden deshalb nicht explizit genannt.With all range indications both in the description and in the claims, those values are meant and thus disclosed which lie between the respectively specified limit values for the ranges. They are therefore not explicitly mentioned.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispiels näher veranschaulicht. Sie zeigt in einem Querschnitt - also quer zur vorgesehenen Laufrichtung - einen Ausschnitt des erfindungsgemäßen Formiersiebes 1.In the drawing, the invention with reference to an embodiment is illustrated in more detail. It shows a section of the forming fabric 1 according to the invention in a cross section, ie transversely to the intended running direction.

Bei dem Formiersieb 1 handelt es sich um ein doppellagiges Gewebe mit einer oberen, papierseitigen Längsfadenlage 2 und einer unteren, maschinenseitigen Längsfadenlage 3. Beide Längsfadenlagen 2, 3 werden von Längs- bzw. Kettfäden - beispielhaft mit 4 bzw. 5 bezeichnet - im Fadenanzahlverhältnis von 1:1 gebildet, wobei jeweils ein Längsfaden 4 der papierseitigen Längsfadenlage 2 genau oberhalb eines Längsfadens 5 in der maschinenseitigen Längsfadenlage 3 angeordnet ist, die Längsfäden 4, 5 also jeweils paarweise Ubereinander liegen.The forming fabric 1 is a double-layered fabric with an upper, paper-side longitudinal thread layer 2 and a lower, machine-side longitudinal thread layer 3. Both longitudinal thread layers 2, 3 are of longitudinal or warp threads - by way of example denoted by 4 or 5 - in the thread number ratio of 1: 1, wherein in each case one longitudinal thread 4 of the paper-side longitudinal thread layer 2 is arranged exactly above a longitudinal thread 5 in the machine-side longitudinal thread layer 3, the longitudinal threads 4, 5 are thus in pairs above one another.

Der Durchmesser der Längsfäden 4 in der papierseitigen Längsfadenlage 2 beträgt 0,11 mm und der Durchmesser der Längsfäden 5 in der maschinenseitigen Längsfadenlage 3 0,18 mm. Sie bestehen aus PEN. Die Längsfadenanzahl beträgt 58 pro cm in Querrichtung.The diameter of the longitudinal threads 4 in the paper-side longitudinal thread layer 2 is 0.11 mm and the diameter of the longitudinal threads 5 in the machine-side longitudinal thread layer 3 0.18 mm. They consist of PEN. The number of longitudinal threads is 58 per cm in the transverse direction.

In die papierseitige Längsfadenlage 2 sind zweite Querfäden 6, 7 unter Bildung einer Leinwandbindung mit den Längsfäden 4 dieser Längsfadenlage 2 eingebunden. Senkrecht zur zeichnungsebene folgen jeweils nebeneinanderliegende zweite Querfäden 6, 7 aufeinander. Die zweiten Querfäden 6, 7 bestehen aus PET, und sie haben einen Durchmesser von 0,11 mm.In the paper-side longitudinal thread layer 2, second transverse threads 6, 7 are integrated with the longitudinal threads 4 of this longitudinal thread layer 2 to form a plain weave. Perpendicular to the drawing plane each adjacent second transverse threads 6, 7 follow each other. The second Cross threads 6, 7 are made of PET, and they have a diameter of 0.11 mm.

Ausschließlich in die maschinenseitige Längsfadenlage 3 sind dritte Querfäden eingebunden, von denen hier nur einer zu sehen ist. Die dritten Querfäden 8 bilden jeweils über fünf Längsfäden 5 gehende Flottierungen - beispielhaft mit 9 bezeichnet - an der Maschinenseite des Formiersiebes 1 und binden dann jeweils mit einem einzigen Längsfaden 5 ein. Die Flottierungen 9 stellen Abriebmaterial zur Schonung der stark auf Zug beanspruchten maschinenseitigen Längsfadenlage 3 dar. Der Durchmesser der dritten Längsfäden beträgt 0,22 mm. Das Material kann PET und/oder PAM sein.Only in the machine-side longitudinal thread layer 3 third transverse threads are involved, of which only one can be seen here. The third transverse threads 8 each form over five longitudinal threads 5 going floats - exemplified with 9 - on the machine side of the forming fabric 1 and then bind each with a single longitudinal thread 5 a. The floats 9 represent abrasion material for the protection of the machine-side longitudinal thread layer 3, which is highly stressed by tension. The diameter of the third longitudinal threads is 0.22 mm. The material can be PET and / or PAM.

Die Längsfadenlagen 2, 3 werden durch Paare von zwei jeweils in Längsrichtung nebeneinander liegenden Bindequerfäden 10, 11 verbunden. Sie haben einen Durchmesser von 0,11 mm und bestehen aus PET. Sie binden in der papierseitigen Längsfadenlage 2 nacheinander abwechselnd oben- und untenseitig mit Längsfäden 4 ein, verlaufen dann zwischen den beiden Längsfadenlagen 2, 3 über drei Längsfäden 4 bzw. 5 und binden dann mit einem einzigen Längsfaden 5 in der maschinenseitigen Längsfadenlage 3 ein, bevor sie dann wieder zwischen den beiden Längsfadenlagen 2 und 3 flottieren. Sie haben jeweils den gleichen Bindungsrapport, sind jedoch zueinander so in Querrichtung - d.h. in deren Längsrichtung - verschoben, dass sich die Bindungsmuster in der papierseitigen Längsfadenlage 2 ergänzen, so dass sie dort zusammen ein Leinwandmuster analog zu den zweiten Querfäden 6, 7 ausbilden. Auf diese weise entsteht auf der Papierseite des Formiersiebes 1 ein nahezu uniformes Leinwandmuster, das eine hohe Faserretention bereitstellt.The longitudinal thread layers 2, 3 are joined by pairs of two binding transverse threads 10, 11, each adjacent to one another in the longitudinal direction. They have a diameter of 0.11 mm and are made of PET. They bind in the paper-side longitudinal thread layer 2 successively alternately above and below with longitudinal threads 4, then extend between the two longitudinal thread layers 2, 3 over three longitudinal threads 4 and 5 and then tie with a single longitudinal thread 5 in the machine-side longitudinal thread layer 3, before then float them again between the two longitudinal thread layers 2 and 3. They each have the same binding repeat, but are shifted to each other in the transverse direction - ie in the longitudinal direction - that the Binding pattern in the paper-side longitudinal thread layer 2 complement so that they together form a canvas pattern analogous to the second transverse threads 6, 7. In this way arises on the paper side of the forming fabric 1, a nearly uniform canvas pattern that provides a high fiber retention.

Der Füllgrad der papierseitigen Längsfadenlage 2 beträgt 31%, der Gesamtfüllgrad der Längsfäden 4, 5 82%. Die Querfadenanzahl ist 108 pro cm in Längsrichtung des Formersiebes 1. Hierdurch entsteht eine hohe Offenheit und damit eine gute Entwässerungswirkung trotz hoher Faserretention. The degree of filling of the paper-side longitudinal thread layer 2 is 31%, the total degree of filling of the longitudinal threads 4, 5 82%. The number of transverse threads is 108 per cm in the longitudinal direction of the forming wire 1. This results in a high openness and thus a good drainage effect despite high fiber retention.

Claims (21)

  1. A forming screen (1) for use in the forming section of a paper machine, comprising a paper and a machine side as well as longitudinal threads (4, 5) extending in the intended running direction and binding cross threads (10, 11) extending transversely thereto, wherein the longitudinal threads (4, 5) are divided in the ratio of the number of threads of 1:1 in a longitudinal thread layer (3) on the machine side and a longitudinal thread layer (2) on the paper side, and the binding cross threads (10, 11) bind in both longitudinal thread layers (2, 3), characterized in that the forming screen (1) has a fiber support index (FSI) which is in the range of 230 to 250 and an air permeability which is in the range of 5700 to 10600 m3/m2/h.
  2. The forming screen according to claim 1, characterized in that the air permeability is in the range of 6500 to 8200 m3/m2/h.
  3. The forming screen according to claim 1, characterized in that the forming screen (1) on the paper side has 1200 to 1600 flow-through openings per cm2 surface of the forming screen (1).
  4. The forming screen according to claim 1, characterized in that the flow-through openings are rectangular in shape with a ratio of the extension in running direction to the extension in transverse direction of 1:1,8 to 1:3,4.
  5. The forming screen according to claim 1, characterized in that the fill degree of the longitudinal threads (4) in the longitudinal thread layer (2) on the paper side is maximum 32%.
  6. The forming screen according to claim 1, characterized in that the total fill degree of all longitudinal threads (4, 5) is maximum 90%, preferably maximum 85%.
  7. The forming screen according to claim 1, characterized in that the diameter of the longitudinal threads (4, 5), at least in the longitudinal thread layer (2) on the paper side, is in the range of 0.08 to 0.12 mm.
  8. The forming screen according to claim 1, characterized in that the diameter of the longitudinal threads (5) in the longitudinal thread layer (3) on the machine side is in the range of 0.15 to 0.25 mm.
  9. The forming screen according to claim 1, characterized in that at least a part of the longitudinal threads (4, 5) consist of PET with an intrinsic viscosity of at least 0.8 dl/g and an elasticity module of at least 10 N/mm2.
  10. The forming screen according to claim 1, characterized in that at least a part of the longitudinal threads (4, 5) consist of PEN.
  11. The forming screen according to claim 1, characterized in that the number of longitudinal threads (4, 5) are in the range of 50 to 66 threads per cm in transverse direction.
  12. The forming screen according to claim 1, characterized in that the number of cross threads (6, 7, 9, 10, 11) are in the range of 100 to 110 threads per cm in longitudinal direction.
  13. The forming screen according to claim 1, characterized in that there are second cross threads (6, 7) which are only bound in the longitudinal thread layer (2) on the paper side.
  14. The forming screen according to claim 13, characterized in that the second cross threads (6, 7), taken alone, form a plain weave with the longitudinal thread layer (2) on the paper side.
  15. The forming screen according to claim 1, characterized in that the binding cross threads (10, 11) are arranged adjacent to one another to form groups of at least two binding cross threads (10, 11) each, whereby one of the binding cross threads (10, 11) binds in the longitudinal thread layer on the machine side when the other binding cross thread (11, 10) or the other binding cross threads bind in the longitudinal thread layer (2) on the paper side.
  16. The forming screen according to claim 15, characterized in that the respectively adjacent binding cross threads (10, 11) bind in the longitudinal thread layer (2) on the paper side with their repeating staggered vis-à-vis one another in such a way that their binding patterns complement one another in transverse direction without a gap.
  17. The forming screen according to claim 15, characterized in that the binding cross threads (10, 11) bind in the longitudinal thread layer (3) on the machine side within a repeating with less longitudinal threads (5) than in the longitudinal thread layer (2) on the paper side.
  18. The forming screen according to claim 17, characterized in that the binding cross threads (10, 11) bind in the longitudinal thread layer (3) on the machine side within a repeating with not more than two longitudinal threads (5).
  19. The forming screen according to claim 1, characterized in that there are third cross threads (8) which only bind in the longitudinal thread layer (3) on the machine side.
  20. The forming screen according to claim 19, characterized in that the third cross threads (8) float on the outer side of the longitudinal thread layer (3) on the machine side over several longitudinal threads (5), wherein the number of these longitudinal threads (5) is always greater than the number of the longitudinal threads (5) with which the third cross threads (8) bind between two floatings (9).
  21. The forming screen according to claim 20, characterized in that the third cross threads (8) float over more than three longitudinal threads (5) on the outside and, in between, only bind with one longitudinal thread (5).
EP07023458A 2007-12-04 2007-12-04 Forming fabric for use in a paper making machine Active EP2067895B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
PL07023458T PL2067895T3 (en) 2007-12-04 2007-12-04 Forming fabric for use in a paper making machine
AT07023458T ATE507346T1 (en) 2007-12-04 2007-12-04 FORMING SCREEN FOR USE IN A PAPER MACHINE
EP07023458A EP2067895B1 (en) 2007-12-04 2007-12-04 Forming fabric for use in a paper making machine
DE502007007082T DE502007007082D1 (en) 2007-12-04 2007-12-04 Forming screen for use in a paper machine
ES07023458T ES2360823T3 (en) 2007-12-04 2007-12-04 TRAINING SIZE FOR EMPLOYMENT IN A PAPER MANUFACTURING MACHINE.
ZA200810217A ZA200810217B (en) 2007-12-04 2008-12-02 Forming screen for use in a paper machine
RU2008147760/12A RU2384662C1 (en) 2007-12-04 2008-12-03 Shaping wire of papermaking machine
CA2645700A CA2645700C (en) 2007-12-04 2008-12-03 Forming screen for use in a paper machine
KR1020080121750A KR101150790B1 (en) 2007-12-04 2008-12-03 Forming screen for use in a paper machine
US12/328,025 US20090139679A1 (en) 2007-12-04 2008-12-04 Forming screen for use in a paper machine
CN2008101788806A CN101451316B (en) 2007-12-04 2008-12-04 Forming screen for use in a paper machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07023458A EP2067895B1 (en) 2007-12-04 2007-12-04 Forming fabric for use in a paper making machine

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EP2067895A1 EP2067895A1 (en) 2009-06-10
EP2067895B1 true EP2067895B1 (en) 2011-04-27

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EP07023458A Active EP2067895B1 (en) 2007-12-04 2007-12-04 Forming fabric for use in a paper making machine

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US (1) US20090139679A1 (en)
EP (1) EP2067895B1 (en)
KR (1) KR101150790B1 (en)
CN (1) CN101451316B (en)
AT (1) ATE507346T1 (en)
CA (1) CA2645700C (en)
DE (1) DE502007007082D1 (en)
ES (1) ES2360823T3 (en)
PL (1) PL2067895T3 (en)
RU (1) RU2384662C1 (en)
ZA (1) ZA200810217B (en)

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DE202018103522U1 (en) 2018-06-21 2018-09-14 Heimbach Gmbh & Co. Kg Covering for paper machines or pulp dewatering machines and use of such

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FI124585B (en) * 2012-02-10 2014-10-31 Valmet Fabrics Oy Textile tape, process for making this and use
DE102013106327B4 (en) * 2013-06-18 2015-01-08 Andritz Technology And Asset Management Gmbh papermaker
ES2563193T3 (en) * 2014-01-28 2016-03-11 Heimbach Gmbh & Co. Kg Paper machine fabric

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US4314589A (en) * 1978-10-23 1982-02-09 Jwi Ltd. Duplex forming fabric
US4379735A (en) * 1981-08-06 1983-04-12 Jwi Ltd. Three-layer forming fabric
US5169711A (en) * 1988-08-05 1992-12-08 Jwi Ltd. Paper makers forming fabric
GB9604602D0 (en) * 1996-03-04 1996-05-01 Jwi Ltd Composite papermaking fabric with paired weft binder yarns
US6103067A (en) * 1998-04-07 2000-08-15 The Procter & Gamble Company Papermaking belt providing improved drying efficiency for cellulosic fibrous structures
FI110131B (en) * 2001-02-22 2002-11-29 Tamfelt Oyj Abp A paper machine fabric
GB2391557A (en) * 2002-08-06 2004-02-11 Richard Stone Forming fabric for papermaking
US6854488B2 (en) * 2002-12-24 2005-02-15 Voith Fabrics Heidenheim Gmbh & Co., Kg Fabrics with paired, interchanging yarns having discontinuous weave pattern
US6905574B2 (en) * 2003-04-18 2005-06-14 Albany International Corp. Multi-layer forming fabric with two warp systems bound together with a triplet of binder yarns
US6902652B2 (en) * 2003-05-09 2005-06-07 Albany International Corp. Multi-layer papermaker's fabrics with packing yarns
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DE202018103522U1 (en) 2018-06-21 2018-09-14 Heimbach Gmbh & Co. Kg Covering for paper machines or pulp dewatering machines and use of such

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EP2067895A1 (en) 2009-06-10
CA2645700C (en) 2011-11-29
PL2067895T3 (en) 2011-09-30
US20090139679A1 (en) 2009-06-04
CA2645700A1 (en) 2009-06-04
RU2384662C1 (en) 2010-03-20
ZA200810217B (en) 2010-09-29
CN101451316B (en) 2011-07-13
ATE507346T1 (en) 2011-05-15
CN101451316A (en) 2009-06-10
ES2360823T3 (en) 2011-06-09
KR101150790B1 (en) 2012-06-14
KR20090058463A (en) 2009-06-09
DE502007007082D1 (en) 2011-06-09

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