EP1977037B1 - Papermachine fabric - Google Patents

Papermachine fabric Download PDF

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Publication number
EP1977037B1
EP1977037B1 EP06818942A EP06818942A EP1977037B1 EP 1977037 B1 EP1977037 B1 EP 1977037B1 EP 06818942 A EP06818942 A EP 06818942A EP 06818942 A EP06818942 A EP 06818942A EP 1977037 B1 EP1977037 B1 EP 1977037B1
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EP
European Patent Office
Prior art keywords
yarns
longitudinal
type
paper
transverse
Prior art date
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EP06818942A
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German (de)
French (fr)
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EP1977037A1 (en
Inventor
Wolfgang Heger
Klaus Fichter
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Andritz Technology and Asset Management GmbH
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Andritz Technology and Asset Management GmbH
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Priority to PL06818942T priority Critical patent/PL1977037T3/en
Priority to SI200631054T priority patent/SI1977037T1/en
Publication of EP1977037A1 publication Critical patent/EP1977037A1/en
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    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/90—Papermaking press felts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/902—Woven fabric for papermaking drier section

Definitions

  • the invention relates to a papermaking wire according to the preamble of claim 1.
  • Pulp suspension refers to a mixture of wood or pulp fibers, fillers, chemical auxiliaries and predominantly water. This filtration process, which is often called sheet formation, takes place in the sheet forming part of the wet end of the paper machine.
  • a fabric or papermaking fabric which meets these requirements as far as possible, is in the DE 100 30 650 C1 described.
  • the object of the present invention is to further improve the known papermachine fabric from its functional properties.
  • a pertinent task solves a papermaking machine with the features of claim 1 in its entirety.
  • the longitudinal threads on the running side within the running side Bindungsrapportes each incorporate two transverse threads of the second type, there is an improved distribution of change or intersection points for the longitudinal threads, so that marks in the paper to be produced are largely avoided.
  • the pertinent integration for the said transverse threads by means of the longitudinal threads is done without these changing between the pairs of embedded transverse threads on the paper side.
  • the claimed shot ratio of the thread system on the paper side to the thread system on the running side leads to a largely self-contained lower or running side with good drainage performance and disturbing operating noise and wear due to increased abrasion of the running side transverse threads is avoided in such a way.
  • the solution according to the invention it is also possible to reduce the transverse threads on the running side in diameter, so that it can not come to the formation of so-called Wasserschleppen; a phenomenon that is caused when the screen after leaving the forming zone by the dewatering elements can not be emptied or insufficient and the residual water is thrown on a deflection roller of the paper machine by the centrifugal forces arising from the tissue.
  • Wasserschleppen a phenomenon that is caused when the screen after leaving the forming zone by the dewatering elements can not be emptied or insufficient and the residual water is thrown on a deflection roller of the paper machine by the centrifugal forces arising from the tissue.
  • the fabric according to the invention is particularly suitable for very fast-moving paper machines and for paper production in the graphic field, which requires very high production qualities.
  • the marking tendency of the upper fabric is preferably further reduced by reducing the number of alternating or crossing points for the longitudinal threads in relation to the number of upper shots used in the form of the transverse threads of the first type or the number of upper shots is increased in the form of transverse threads of the first kind between adjacent warp alternating points. Furthermore, there is the possibility of reducing the tendency to mark when the fabric is being carried out, to further remove the position of the warp change points between two adjacent pairs of warps.
  • slightly thinner running side transverse threads of the second type are introduced within a repeat by the changed shot ratio. This can also reduce the sieve thickness, which reduces the risk of unwanted water drag.
  • the claimed sieve also allows an increase in the permeability and thus the drainage performance at a comparable number of shots on the top or the paper side of the screen, due to the special arrangement of the integration of the running side shots in the form of transverse threads of the second type.
  • FIG. 3 a complete binding repeat of the embodiment according to the invention in the form of Kettverierin or courses of MD threads shown.
  • the cuts of FIGS. 3a to 3h lie along each Kettfadenploes in Fig. 4 starting from the left next to each other.
  • Fig. 3a Incidentally, the illustration corresponds to the Fig. 2 ,
  • Fig. 4 the paper side of the fabric according to the invention is shown.
  • the upper fabric is as in the solution in the prior art according to the Fig. 1 from a plain weave, which is formed alternately by two warp threads (longitudinal threads 41 to 56).
  • the change points under the shots 2, 5, 8, 11, 14, 17, 20 and 23 always two upper shots 1, 3, 4, 6, 7, 9, 10, etc., under which there is never a change.
  • the Fig. 5 further shows the lower fabric in the top view, so a section along the line AA in Fig. 2 .
  • the special design of the Unterschusseinitatien which is designed so that the two outer warp threads of two pairs of warp tie together two sub-shots and in turn two shots are not involved. This ensures that the warp threads located in the lower fabric are pulled under the warp threads located in the upper fabric and thus open areas for a good drainage performance.
  • the warp threads 41 and 42 so far form a pair of longitudinal threads for creating the paper side (see. Fig. 3a ). When the warp thread 41 binds on the running side, the warp thread 42 is on the overlying paper side and vice versa.
  • the adjacent pair of warp threads 43 and 44 fulfills the same task, but seen to the right in the line of sight.
  • the warp thread 41 is always located to the left of the warp thread 42 and the warp thread 43 always left of the warp thread 44.
  • the outer warp threads within these two pairs are then the threads 41 and 44th

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  • Paper (AREA)
  • Materials For Medical Uses (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Gloves (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

A papermaking screen, especially for the sheet forming zone, has one paper side and one machine side with a first type of transverse yarns of the paper side and a second type of transverse yarns ( 25 to 40 ) of the machine side. The transverse yarns are woven with at least one type of longitudinal yarns ( 41 to 56 ). The longitudinal yarns ( 41 to 56 ) on the machine side within the machine-side pattern repeat bind two respective transverse yarns of the second type ( 25, 28; 31, 34; 37, 40 ). The division of the intersections for the longitudinal yarns is then improved, so that marks in the paper to be produced are prevented to the greatest extent possible.

Description

Die Erfindung betrifft ein Papiermaschinensieb gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a papermaking wire according to the preamble of claim 1.

Die Entwässerung der Faserstoffsuspension durch Filtration ist innerhalb des Verfahrens der Papierherstellung ein wesentlicher Prozess. Als Faserstoffsuspension bezeichnet man ein Gemisch aus Holz- oder Zellstofffasern, Füllstoffen, chemischen Hilfsstoffen und überwiegend Wasser. Dieser Filtrationsprozess der oftmals auch Blattbildung genannt wird, erfolgt im Blattbildungsteil der Nasspartie der Papiermaschine.The dewatering of the pulp suspension by filtration is an essential process within the papermaking process. Pulp suspension refers to a mixture of wood or pulp fibers, fillers, chemical auxiliaries and predominantly water. This filtration process, which is often called sheet formation, takes place in the sheet forming part of the wet end of the paper machine.

Um ein möglichst gleichmäßiges Papierblatt herstellen zu können, ist es erforderlich, die Wassermenge innerhalb der Faserstoffsuspension unmittelbar vor der Blattbildung auf etwa 99 % zu erhöhen. Während des Blattbildungsprozesses wird dieser Anteil durch Filtration auf ca. 80 % reduziert. Die Papierfasern sowie die Füll- und Hilfsstoffe bleiben als Faservlies auf dem Papiermaschinensieb zurück.In order to be able to produce as uniform a paper sheet as possible, it is necessary to increase the amount of water within the pulp suspension to approximately 99% immediately before sheet formation. During the sheet formation process, this fraction is reduced by filtration to about 80%. The paper fibers as well as the fillers and auxiliaries remain as a nonwoven on the paper machine screen.

Während früher die Entwässerung hauptsächlich durch ein Papiermaschinensieb auf Langsiebmaschinen erfolgte, kommen heute immer häufiger Doppelsiebmaschinen, vorzugsweise so genannte Gap- oder Spaltformer zum Einsatz. Letztere zeichnen sich dadurch aus, dass die Faserstoffsuspension in einen Spalt gespritzt wird, der durch zwei Papiermaschinensiebe gebildet ist. Die Entwässerung hierbei erfolgt zeitgleich durch beide Siebe, wodurch der Filtrationsprozess und damit auch die Produktionsgeschwindigkeit der Papiermaschine erheblich beschleunigt werden konnte. Heute existieren Papiermaschinen für den Hygienepapierbereich mit Geschwindigkeiten von mehr als 2.000 m/min.Whereas in the past drainage was mainly done by a paper machine screen on a wire-screening machine, nowadays double-screen machines, preferably so-called gap or gap formers, are increasingly being used. The latter are characterized in that the pulp suspension is injected into a gap which is formed by two paper machine sieves. The dewatering takes place at the same time through both screens, whereby the filtration process and thus the production speed of the paper machine could be significantly accelerated. Today, there are paper machines for the tissue sector with speeds of more than 2,000 m / min.

Diese extremen Bedingungen in der Papiermaschine erfordern speziell dafür ausgelegte Blattbildungssiebe, die eine hohe Faserunterstützung bei trotzdem noch hoher Stabilität und Offenheit bieten. Speziell für den Bereich der grafischen Papiere ist zusätzlich eine geringe Markierneigung des Gewebes, also eine hohe Gewebegleichmäßigkeit erforderlich.These extreme conditions in the paper machine require specially designed sheet forming screens that provide high fiber support while still providing high stability and openness. In addition, for the area of graphic papers, a slight tendency to marrow of the tissue, ie a high degree of tissue uniformity, is additionally required.

Ein Gewebe oder Papiermaschinensieb, das weitestgehend diesen Anforderungen gerecht wird, ist in der DE 100 30 650 C1 beschrieben.A fabric or papermaking fabric, which meets these requirements as far as possible, is in the DE 100 30 650 C1 described.

Aufgabe der vorliegenden Erfindung ist es, das bekannte Papiermaschinensieb von seinen Funktionseigenschaften noch weiter zu verbessern. Eine dahingehende Aufgabe löst ein Papiermaschinensieb mit den Merkmalen des Patentanspruches 1 in seiner Gesamtheit.The object of the present invention is to further improve the known papermachine fabric from its functional properties. A pertinent task solves a papermaking machine with the features of claim 1 in its entirety.

Dadurch, dass gemäß dem kennzeichnenden Teil des Patentanspruches 1 die Längsfäden auf der Laufseite innerhalb des laufseitigen Bindungsrapportes jeweils zwei Querfäden der zweiten Art einbinden, ergibt sich eine verbesserte Aufteilung der Wechsel- oder Kreuzungsstellen für die Längsfäden, sodass Markierungen im herzustellenden Papier weitestgehend vermieden sind. Die dahingehende Einbindung für die genannten Querfäden mittels der Längsfäden geschieht, ohne dass diese zwischen den Paaren an eingebundenen Querfäden auf die Papierseite wechseln. Das beanspruchte Schussverhältnis des Fadensystems auf der Papierseite zu dem Fadensystem auf der Laufseite führt zu einer weitgehend in sich geschlossenen Unter- oder Laufseite mit dennoch guter Entwässerungsleistung und störende Betriebsgeräusche sowie Verschleiß durch einen verstärkten Abrieb der laufseitigen Querfäden ist dergestalt vermieden.Characterized in that according to the characterizing part of claim 1, the longitudinal threads on the running side within the running side Bindungsrapportes each incorporate two transverse threads of the second type, there is an improved distribution of change or intersection points for the longitudinal threads, so that marks in the paper to be produced are largely avoided. The pertinent integration for the said transverse threads by means of the longitudinal threads is done without these changing between the pairs of embedded transverse threads on the paper side. The claimed shot ratio of the thread system on the paper side to the thread system on the running side leads to a largely self-contained lower or running side with good drainage performance and disturbing operating noise and wear due to increased abrasion of the running side transverse threads is avoided in such a way.

Durch die erfindungsgemäße Lösung ist es des Weiteren möglich, die Querfäden auf der Laufseite im Durchmesser zu verringern, sodass es nicht zur Bildung von so genannten Wasserschleppen kommen kann; eine Erscheinung die hervorgerufen wird, wenn das Sieb nach Verlassen der Blattbildungszone durch die Entwässerungselemente nicht oder nicht ausreichend entleert werden kann und das Restwasser an einer Umlenkwalze der Papiermaschine durch die entstehenden Fliehkräfte aus dem Gewebe geschleudert wird. Neben einer unangenehmen Nebelbildung kann es im Extremfall auch dazu kommen, dass die verschleppten Wassertropfen zurück auf die Papierbahn fallen und dort zur Löcherbildung führen, was dann zu unbrauchbaren Papierqualitäten führt. Das erfindungsgemäße Gewebe eignet sich insbesondere für sehr schnell laufende Papiermaschinen und für die Papierherstellung im grafischen Bereich, die sehr hohe Fertigungsqualitäten voraussetzt.By the solution according to the invention, it is also possible to reduce the transverse threads on the running side in diameter, so that it can not come to the formation of so-called Wasserschleppen; a phenomenon that is caused when the screen after leaving the forming zone by the dewatering elements can not be emptied or insufficient and the residual water is thrown on a deflection roller of the paper machine by the centrifugal forces arising from the tissue. In addition to an unpleasant mist formation it can also happen in extreme cases that the dragged drops of water fall back onto the paper web and lead there to the formation of holes, which then unusable paper grades. The fabric according to the invention is particularly suitable for very fast-moving paper machines and for paper production in the graphic field, which requires very high production qualities.

Die Markierungsneigung des Obergewebes, also der Papierseite des Siebes, wird vorzugsweise dadurch weiter verringert, dass die Anzahl der Wechsel- oder Kreuzungsstellen für die Längsfäden bezogen auf die eingesetzte Anzahl an Oberschüssen in Form der Querfäden der ersten Art reduziert wird bzw. die Anzahl der Oberschüsse in Form der Querfäden der ersten Art zwischen einander benachbarten Kettwechselstellen erhöht wird. Ferner besteht die Möglichkeit zur Reduzierung der Markierungsneigung bei Ausführung des Gewebes die Lage der Kettwechselstellen zwischen zwei benachbarten Kettpaaren weiter voneinander zu entfernen.The marking tendency of the upper fabric, ie the paper side of the screen, is preferably further reduced by reducing the number of alternating or crossing points for the longitudinal threads in relation to the number of upper shots used in the form of the transverse threads of the first type or the number of upper shots is increased in the form of transverse threads of the first kind between adjacent warp alternating points. Furthermore, there is the possibility of reducing the tendency to mark when the fabric is being carried out, to further remove the position of the warp change points between two adjacent pairs of warps.

Bei einer besonders bevorzugten Ausführungsform des erfindungsgemäßen Papiermaschinensiebes ist vorgesehen, dessen Laufseite zu vergleichmäßigen, indem durch das veränderte Schussverhältnis eine größere Anzahl im Querschnitt geringfügig dünnerer laufseitiger Querfäden der zweiten Art innerhalb eines Rapportes eingebracht sind. Hierdurch lässt sich auch die Siebdicke verringern, was die Gefahr des nicht gewollten Wasserschleppens reduziert. Das beanspruchte Sieb erlaubt auch eine Erhöhung der Durchlässigkeit und mithin der Entwässerungsleistung bei einer vergleichbaren Schusszahl auf der Ober- oder der Papierseite des Siebes, bedingt durch die spezielle Anordnung der Einbindung der laufseitigen Schüsse in Form der Querfäden der zweiten Art.In a particularly preferred embodiment of the papermaking machine according to the invention is provided to even the running side by a larger number in cross-section slightly thinner running side transverse threads of the second type are introduced within a repeat by the changed shot ratio. This can also reduce the sieve thickness, which reduces the risk of unwanted water drag. The claimed sieve also allows an increase in the permeability and thus the drainage performance at a comparable number of shots on the top or the paper side of the screen, due to the special arrangement of the integration of the running side shots in the form of transverse threads of the second type.

Weitere vorteilhafte Ausführungsformen der erfindungsgemäßen Papiermaschinensieblösung sind Gegenstand der sonstigen Unteransprüche.Further advantageous embodiments of the paper machine screen solution according to the invention are the subject of the other dependent claims.

Im Folgenden wird die erfindungsgemäße Lösung anhand eines Ausführungsbeispieles nach der Zeichnung näher erläutert. Dabei zeigen in prinzipieller Darstellung die

Fig. 1
den Verlauf zweier Kettfäden einer Sieblösung im Stand der Tech- nik nach der DE 100 30 650 C1 ;
Fig. 2
eine der Fig. 1 entsprechende Kettverlaufdarstellung für die erfin- dungsgemäße Lösung über einen Rapport;
Fig. 3
den Verlauf der Kettfäden für einen kompletten Rapport der erfin- dungsgemäßen Bindung;
Fig. 4
einen kompletten Bindungsrapport für die Papierseite, wobei die laufseitigen Schüsse zur Verbesserung der Übersichtlichkeit wegge- lassen sind und
Fig. 5
einen kompletten Bindungsrapport der Laufseite mit Blick von oben entsprechend der Schnittdarstellung A-A in Fig. 2.
In the following, the solution according to the invention is explained in more detail using an exemplary embodiment according to the drawing. This show in a schematic representation of the
Fig. 1
the course of two warp threads of a Sieblösung in the state of the art according to the DE 100 30 650 C1 ;
Fig. 2
one of the Fig. 1 Corresponding Kettverlaufdarstellung for the inventive solution via a repeat;
Fig. 3
the course of the warp threads for a complete repeat of the binding according to the invention;
Fig. 4
a complete binding repeat for the paper side, whereby the running shots are omitted for the sake of clarity and
Fig. 5
a complete binding repeat of the running side as seen from above according to the sectional view AA in Fig. 2 ,

Zunächst soll anhand der Figuren 1 und 2 die Unterschiede zwischen der bekannten Ausführungsform nach der Fig. 1 zu der erfindungsgemäßen Ausführung nach der Fig. 2 anhand des Verlaufes vergleichbarer Kettfäden verdeutlicht werden. Vorausgeschickt wird an dieser Stelle ferner, dass bei der nachfolgenden Beschreibung Kettfäden auch mit machine direction-Fäden (MD-Fäden) bezeichnet werden sowie mit der Angabe Längsfaden oder mit der Bezeichnung Unter- und Oberketten. Die Schussfäden wiederum können gleichgesetzt werden mit der Angabe cross machine direction-Fäden (CMD-Fäden), mit der Angabe Querfäden oder mit der Angabe Unter- und Oberschüsse. Um einen Vergleich herstellen zu können, wurden beide Zeichnungen nach den Figuren 1 und 2 mit der gleichen Anzahl von 24 papierseitigen Schüssen bzw. CMD-Fäden 1 bis 24 ausgeführt. Dabei sind folgende maßgeblichen Unterschiede erkennbar:

  • Der Abstand der Kettwechselstellen steigt von ursprünglich acht Oberschüssen bei der erfindungsgemäßen Lösung auf zwölf. Dadurch treten bei gleicher Fadenzahl auf der Papierseite die störenden Wechselstellen seltener auf.
  • Die Anzahl Unterschüsse hat sich bei der erfindungsgemäßen Lösung erhöht. Bei gleicher Materialfülldichte auf der Laufseite können kleinere Durchmesser verwendet werden, wodurch die Dicke sinkt.
  • Die Abstände zwischen den Unterschüssen werden kleiner, wobei die Summe der Abstände gleich bleibt (gleiche Materialfülldichte). Die Gleichmäßigkeit der Unterseite erhöht sich insoweit bei der erfindungsgemäßen Bindung.
  • Zwischen zwei Kettwechselstellen bindet die sich im Untergewebe befindliche Kette mit zwei Unterschüssen. In Verbindung mit einer zweiten Unterkette wird die Untergewebebindung bei der erfindungsgemäßen Lösung derart realisiert, dass eine hohe Offenheit erreicht ist, d. h. das erfindungsgemäße Sieb verfügt über eine verbesserte Entwässerungsleistung.
First, based on the Figures 1 and 2 the differences between the known embodiment according to the Fig. 1 to the embodiment according to the invention according to the Fig. 2 be illustrated by the course of comparable warp threads. It is also anticipated at this point that in the following description warp threads are also referred to as machine direction threads (MD threads) and also as longitudinal thread or as lower and upper chains. The weft threads, in turn, can be equated with the indication of cross machine direction threads (CMD threads), with the indication of transverse threads or with the specification of lower and upper shots. To make a comparison, both drawings were after the Figures 1 and 2 with the same number of 24 paper-side shots or CMD threads 1 to 24 executed. The following significant differences are recognizable:
  • The distance of the warp change points increases from originally eight upper shots in the inventive solution to twelve. As a result, the disturbing change points occur less frequently with the same number of threads on the paper side.
  • The number of defaults has increased in the inventive solution. With the same material filling density on the running side smaller diameter can be used, whereby the thickness decreases.
  • The distances between the sub-shots become smaller, with the sum of the distances remaining the same (same material filling density). The uniformity of the underside increases so far in the binding according to the invention.
  • The chain located in the lower tissue binds with two lower shots between two warp points. In connection with a second sub-chain, the lower weave weave in the solution according to the invention is realized in such a way that a high degree of openness is achieved, ie the sieve according to the invention has an improved drainage performance.

Dies vorausgeschickt wird in der Fig. 3 ein kompletter Bindungsrapport der erfindungsgemäßen Ausführung in Form von Kettverläufen bzw. Verläufen der MD-Fäden gezeigt. Die Schnitte der Figuren 3a bis 3h liegen entlang eines jeden Kettfadenpaares in Fig. 4 beginnend von links nebeneinander. Fig. 3a entspricht im Übrigen der Darstellung nach der Fig. 2.This will be sent in advance Fig. 3 a complete binding repeat of the embodiment according to the invention in the form of Kettverläufen or courses of MD threads shown. The cuts of FIGS. 3a to 3h lie along each Kettfadenpaares in Fig. 4 starting from the left next to each other. Fig. 3a Incidentally, the illustration corresponds to the Fig. 2 ,

Aus den dahingehenden Figuren ergibt sich bereits die spezielle Art der Untergewebeeinbindung. Betrachtet man die Unterkette 41, so bindet diese unterhalb der Unterschüsse 25 und 28. Mit den gleichen Unterschüssen bindet auch die als vierter Längsfaden im Gewebe liegende Kette 44. Durch die gemeinsame nicht weit entfernte Einbindung auf dem gleichen Schuss nähern sich beide Ketten in diesem Bereich aneinander an und befinden sich somit unterhalb der jeweils zum Paar gehörenden, sich im Obergewebe befindenden Ketten 42 bzw. 43.From the pertinent figures already results in the special type of sub-tissue integration. Looking at the sub-chain 41, this binds below the sub-shots 25 and 28. With the same sub-shots also binds as the fourth longitudinal thread in the tissue lying chain 44. Due to the joint not far away integration on the same shot, both chains approach each other in this area and are therefore below each belonging to the pair, located in the upper fabric chains 42 and 43, respectively.

In Fig. 4 wird die Papierseite des erfindungsgemäßen Gewebes gezeigt. Der einfacheren Darstellung wegen wurden in der Fig. 4 die Unterschüsse nicht gezeigt. Das Obergewebe besteht wie bei der Lösung im Stand der Technik nach der Fig. 1 aus einer Leinwandbindung, die abwechselnd von zwei Kettfäden (Längsfäden 41 bis 56) gebildet wird. Im Gegensatz zur bekannten Lösung nach der Fig. 1 befinden sich aber zwischen den Wechselstellen unter den Schüssen 2, 5, 8, 11, 14, 17, 20 und 23 immer zwei Oberschüsse 1, 3, 4, 6, 7, 9, 10 usw., unter denen nie ein Wechsel stattfindet.In Fig. 4 the paper side of the fabric according to the invention is shown. For the sake of simplicity, in the Fig. 4 the deficits are not shown. The upper fabric is as in the solution in the prior art according to the Fig. 1 from a plain weave, which is formed alternately by two warp threads (longitudinal threads 41 to 56). In contrast to the known solution according to the Fig. 1 but are between the change points under the shots 2, 5, 8, 11, 14, 17, 20 and 23 always two upper shots 1, 3, 4, 6, 7, 9, 10, etc., under which there is never a change.

Die Fig. 5 zeigt des Weiteren das Untergewebe in der Ansicht von oben, also ein Schnitt entlang der Linie A-A in Fig. 2. Hier sieht man die spezielle Ausführung der Unterschusseinbindungen, die so ausgeführt ist, dass die zwei äußeren Kettfäden zweier Kettpaare gemeinsam zwei Unterschüsse einbinden und dazwischen wiederum zwei Schüsse nicht eingebunden sind. Dadurch erreicht man, dass die im Untergewebe befindlichen Kettfäden unter die sich im Obergewebe befindenden Kettfäden gezogen werden und somit offene Bereiche für eine gute Entwässerungsleistung entstehen. Die Kettfäden 41 und 42 bilden insoweit ein Längsfadenpaar zur Erstellung der Papierseite (vgl. Fig. 3a). Wenn der Kettfaden 41 auf der Laufseite bindet, befindet sich der Kettfaden 42 auf der darüber liegenden Papierseite und umgekehrt. Das benachbarte Paar an Kettfäden 43 und 44 (vgl. Fig. 3b) erfüllt dieselbe Aufgabe, aber in Blickrichtung gesehen rechts daneben. Dabei ist der Kettfaden 41 immer links vom Kettfaden 42 angeordnet und der Kettfaden 43 immer links vom Kettfaden 44. Die äußeren Kettfäden innerhalb dieser beiden Paare sind dann also die Fäden 41 und 44.The Fig. 5 further shows the lower fabric in the top view, so a section along the line AA in Fig. 2 , Here you can see the special design of the Unterschusseinbindungen, which is designed so that the two outer warp threads of two pairs of warp tie together two sub-shots and in turn two shots are not involved. This ensures that the warp threads located in the lower fabric are pulled under the warp threads located in the upper fabric and thus open areas for a good drainage performance. The warp threads 41 and 42 so far form a pair of longitudinal threads for creating the paper side (see. Fig. 3a ). When the warp thread 41 binds on the running side, the warp thread 42 is on the overlying paper side and vice versa. The adjacent pair of warp threads 43 and 44 (see. Fig. 3b ) fulfills the same task, but seen to the right in the line of sight. there the warp thread 41 is always located to the left of the warp thread 42 and the warp thread 43 always left of the warp thread 44. The outer warp threads within these two pairs are then the threads 41 and 44th

Genau diese beiden Kettfäden binden dann aber gemeinsam die Unterschüsse 25 und 28 als Querfäden der zweiten Art bezogen auf die Laufseite ein und verlaufen also insoweit unterhalb dieser laufseitigen Schüsse (vgl. Figuren 3a, b und Fig. 5). Durch die Verkröpfung der Unterschüsse werden die beiden Ketten in das Zentrum der Einbindung gezogen, das sich unterhalb der beiden inneren Kettfäden 42 und 43 befindet. Damit sind die Ketten 41 und 44 faktisch von der Oberseite aus nicht mehr zu sehen und es eröffnet sich links und rechts der oben verlaufenden Ketten 42 und 43 der offene Bereich.Exactly these two warp threads bind then but together the sub-shots 25 and 28 as transverse threads of the second kind based on the running side and thus run so far below this run-side shots (see. FIGS. 3a, b and Fig. 5 ). By cranking the defaults, the two chains are pulled into the center of the binding, which is located below the two inner warp threads 42 and 43. Thus, the chains 41 and 44 are virtually no longer visible from the top and it opens to the left and right of the top extending chains 42 and 43 of the open area.

Claims (5)

  1. A paper machine sieve with a paper side and a running side, consisting of:
    - a first type of transverse yarns (1 to 24) of the paper side and
    - a second type of transverse yarns (25 to 40) of the running side
    - which are interwoven with at least one type of longitudinal yarns (41 to 56),
    - two adjacent longitudinal yarns respectively forming a longitudinal yarn pair (41, 42; 43, 44; 45, 46; 47, 48; 49, 50; 51, 52; 53, 54; 55, 56) which in alternation form a plain weave on the paper side,
    - wherein each longitudinal yarn pair (41, 42; ...) forms at least one intersection of the first type and one intersection of the second type within a pattern repeat of the running side, so that the longitudinal yarns of the respective longitudinal yarn pair (41, 42; ...) alternate to the running side under formation of at least two different intersections within the pattern repeat of the running side, and
    - wherein within the pattern repeat of the running side each or a part of the second type of transverse yarns (25 to 40) is bound by at least two longitudinal yarns (41 to 56),
    characterized in that within the pattern repeat of the running side the longitudinal yarns (41 to 56) respectively bind two transverse yarns of the second type (25, 28; 31, 34; 35, 38; 29, 32; 26, 39; 33, 36; 27, 30; 37, 40; 31, 34) on the running side.
  2. The paper machine sieve according to claim 1, characterized in that within two adjacent longitudinal yarn pairs (41, 42; 43, 44) always two outer longitudinal yarns (41, 44) together effect binding for a part (25, 28) of the second type of transverse yarns (25 to 40).
  3. The paper machine sieve according to claim 1 or 2, characterized in that viewed in the transverse direction of the sieve, between two adjacent intersections at least three longitudinal yarns (41 to 56) are arranged on the paper side.
  4. The paper machine sieve according to claim 1 or 2, characterized in that viewed in the longitudinal direction of the sieve, between two adjacent intersections of two adjacent longitudinal yarn pairs (41, 42; 43, 44) at least two transverse yarns of the first type (1 to 24) are arranged on the paper side below which no alternation occurs.
  5. The paper machine sieve according to any of claims 1 to 4, characterized in that on the paper side two adjacent intersections of a longitudinal yarn pair (41, 42; ...) are arranged so as to be shifted by twelve transverse yarns of the first type (1 to 24).
EP06818942A 2006-01-11 2006-12-01 Papermachine fabric Active EP1977037B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL06818942T PL1977037T3 (en) 2006-01-11 2006-12-01 Papermachine fabric
SI200631054T SI1977037T1 (en) 2006-01-11 2006-12-01 Papermachine fabric

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006001388A DE102006001388A1 (en) 2006-01-11 2006-01-11 papermaker
PCT/EP2006/011541 WO2007087852A1 (en) 2006-01-11 2006-12-01 Papermachine fabric

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EP1977037A1 EP1977037A1 (en) 2008-10-08
EP1977037B1 true EP1977037B1 (en) 2011-04-06

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US (1) US7406985B2 (en)
EP (1) EP1977037B1 (en)
KR (1) KR101251310B1 (en)
CN (1) CN101351592B (en)
AT (1) ATE504691T1 (en)
BR (1) BRPI0620975B1 (en)
DE (2) DE102006001388A1 (en)
DK (1) DK1977037T3 (en)
ES (1) ES2362625T3 (en)
PL (1) PL1977037T3 (en)
PT (1) PT1977037E (en)
SI (1) SI1977037T1 (en)
WO (1) WO2007087852A1 (en)

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Publication number Priority date Publication date Assignee Title
RU2354764C2 (en) * 2004-09-30 2009-05-10 ЭстенДжонсон, Инк. Double-layer shaping mesh with high resistance in central plane
DE102006001388A1 (en) * 2006-01-11 2007-07-12 Andreas Kufferath Gmbh & Co. Kg papermaker
DE102010017055A1 (en) * 2010-05-21 2011-11-24 Andritz Technology And Asset Management Gmbh forming wire
FI128025B (en) * 2017-03-24 2019-08-15 Valmet Technologies Oy An industrial textile

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
SE441016B (en) * 1982-04-26 1985-09-02 Nordiskafilt Ab PREPARATION WIRES FOR PAPER, CELLULOSA OR SIMILAR MACHINES
DE3615304A1 (en) * 1986-05-06 1987-11-12 Wangner Gmbh Co Kg Hermann COVER FOR THE SHEET FORMING PART OF A PAPER MACHINE
DE3923938A1 (en) * 1989-07-19 1991-01-31 Oberdorfer Fa F FORMING FABRICS FOR THE WET SECTION OF A PAPER MACHINE
DE3938159A1 (en) * 1989-11-16 1991-05-23 Oberdorfer Fa F COMPOSITE FABRICS FOR PAPER MACHINE BENCH
US5421374A (en) * 1993-10-08 1995-06-06 Asten Group, Inc. Two-ply forming fabric with three or more times as many CMD yarns in the top ply than in the bottom ply
GB9604602D0 (en) * 1996-03-04 1996-05-01 Jwi Ltd Composite papermaking fabric with paired weft binder yarns
US5865219A (en) * 1997-07-31 1999-02-02 Asten, Inc. Double layer papermaking fabric having a high stability weave
US5881764A (en) * 1997-08-01 1999-03-16 Weavexx Corporation Multi-layer forming fabric with stitching yarn pairs integrated into papermaking surface
US6334467B1 (en) * 1999-12-08 2002-01-01 Astenjohnson, Inc. Forming fabric
DE10030650C1 (en) * 2000-06-29 2002-05-29 Kufferath Andreas Gmbh papermaker
DE10123204C2 (en) * 2001-05-12 2003-03-27 Kufferath Andreas Gmbh papermaker
US6896009B2 (en) * 2003-03-19 2005-05-24 Weavexx Corporation Machine direction yarn stitched triple layer papermaker's forming fabrics
DE102006001388A1 (en) * 2006-01-11 2007-07-12 Andreas Kufferath Gmbh & Co. Kg papermaker

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KR20080107371A (en) 2008-12-10
BRPI0620975B1 (en) 2016-09-27
ATE504691T1 (en) 2011-04-15
WO2007087852A1 (en) 2007-08-09
DE502006009284D1 (en) 2011-05-19
DE102006001388A1 (en) 2007-07-12
ES2362625T3 (en) 2011-07-08
DK1977037T3 (en) 2011-07-04
SI1977037T1 (en) 2011-08-31
US20070157988A1 (en) 2007-07-12
CN101351592B (en) 2011-11-16
US7406985B2 (en) 2008-08-05
CN101351592A (en) 2009-01-21
PL1977037T3 (en) 2011-09-30
EP1977037A1 (en) 2008-10-08
PT1977037E (en) 2011-06-07
BRPI0620975A2 (en) 2011-11-29
KR101251310B1 (en) 2013-04-09

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