EP1054098B1 - Papermaking fabric, in particular a dryer cloth - Google Patents

Papermaking fabric, in particular a dryer cloth Download PDF

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Publication number
EP1054098B1
EP1054098B1 EP00108202A EP00108202A EP1054098B1 EP 1054098 B1 EP1054098 B1 EP 1054098B1 EP 00108202 A EP00108202 A EP 00108202A EP 00108202 A EP00108202 A EP 00108202A EP 1054098 B1 EP1054098 B1 EP 1054098B1
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EP
European Patent Office
Prior art keywords
weft
flat
round
papermaking fabric
yams
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Expired - Lifetime
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EP00108202A
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German (de)
French (fr)
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EP1054098A1 (en
Inventor
Walter Dr. Best
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heimbach GmbH and Co KG
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Thomas Josef Heimbach and Co GmbH
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Publication of EP1054098A1 publication Critical patent/EP1054098A1/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
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
    • D03D15/46—Flat yarns, e.g. tapes or films
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/06—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers
    • D10B2331/061—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers polyetherketones, polyetheretherketones, e.g. PEEK
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/30—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14
    • D10B2331/301—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensation products not covered by indexing codes D10B2331/02 - D10B2331/14 polyarylene sulfides, e.g. polyphenylenesulfide

Abstract

The blanket for a papermaking machine has a woven structure with ribbon wefts (2) at the side towards the paper and round we filaments at the machine side. At least two of the round weft filaments (6,7) at the machine side lie against part of the ribbon weft (2) on the paper side, and both weft types are bonded together by at least part of the warp filaments (4,5,12,14). The round weft filaments against the ribbon weft (2) are next to each other. The sum of the diameters of the round weft filaments at the ribbon weft (2) does not exceed the longitudinal width along the length of the blanket (1). The blanket contains no additional wefts apart from the two round weft filaments in contact with the under surface of the ribbon wefts (2). The bonding structure of the woven material, by the warps, is only partially at the paper side, and only with round wefts between those agai the ribbon wefts. At least part of the wefts in the blanket can be ribbons with projecting longitudinal ribs, at the machine sid with a rectangular, trapezoid and/or round cross section. Two or three longitudinal ribs are formed next to each other. The widt the flat wefts, along the longitudinal line of the blanket, is 1-25 mm and preferably 10-15 mm and they have a thickness of 0.2- mm. The warps (4,5,12,14) can have a flat structure with a width on the lateral line of the blanket of 0.5-5.0 mm and with a thickness of 0.2-1.0 mm. The warps (4,5,12,14) bind in only one ribbon weft (2). With at least part of the warps (4,5,12,14), ea neighboring pair of warps (4,5) form warp pairs (3,13,15) in an identical bonding with the wefts (2).

Description

Die Erfindung betrifft eine Papiermaschinenbespannung, insbesondere als Trockensieb, mit einer für die Auflage einer Papierbahn vorgesehenen Papierseite und einer davon abgewandten Maschinenseite, wobei die Papiermaschinenbespannung ein Gewebe aus Längs- und Querfäden hat oder daraus besteht.The invention relates to a paper machine clothing, especially as a dryer fabric, with one for the pad a paper web provided and one of them machine side facing away, the paper machine clothing has a fabric of longitudinal and transverse threads or consists of it.

Ein solches Trockensieb ist der US 4 621 663 zu entnehmen. Es besteht aus einem Gewebe mit zwei Längsfadensystemen, wobei das maschinenseitige Längsfadensystem aus Rundfäden und das papierseitige Längsfadensystem aus sehr breiten Flachfäden besteht. Das maschinenseitige Längsfadensystem bindet in ein doppellagiges, maschinenseitiges Querfadensystem ein. Zusätzlich zu diesem Querfadensystem ist zwischen den beiden Längsfadensystemen ein zweites Querfadensystem aus Flachquerfäden angeordnet, die von den Längsfäden beider Systeme eingebunden werden und die beiden Längsfadensysteme auf diese Weise miteinander verbinden. Die Flachquerfäden haben einen relativ großen Abstand zueinander und sind von den Rundquerdrähten des ersten Querfadensystems durch die Längsfäden getrennt. Such a dryer fabric can be found in US 4,621,663. It consists of a fabric with two longitudinal thread systems, wherein the machine-side longitudinal thread system Round threads and the paper-side longitudinal thread system made of very wide flat threads. The machine-side longitudinal thread system binds in a double-layer, machine-side Cross thread system. In addition to this cross thread system is a second between the two longitudinal thread systems Cross thread system made of flat cross threads arranged by the longitudinal threads of both systems are integrated and the Connect the two longitudinal thread systems in this way. The flat cross threads have a relatively large distance to each other and are from the round cross wires of the first Cross thread system separated by the longitudinal threads.

Das vorbekannte Trockensieb bildet zwar eine sehr glatte Oberfläche auf der Papierseite aus. Es hat jedoch den Nachteil, daß es sehr voluminös ist und zudem aufwendig herzustellen ist.The previously known dryer fabric forms a very smooth one Surface on the paper side. However, it does Disadvantage that it is very voluminous and also expensive is to be produced.

Einen einfacheren Aufbau hat das Trockensieb nach der US 4 829 681. Bei einem Ausführungsbeispiel sind sämtliche Querfäden als Flachquerfäden ausgebildet, die von den Längsfäden eingebunden werden. Dabei können die Längsfäden auch einen umgekehrten U-förmigen Querschnitt haben. Dieser Querschnitt sorgt jedoch für eine hohe Steifigkeit der Längsfäden mit der Folge, daß die Längsfäden eine sehr buckelige Oberfläche auf der Papierseite erzeugen und dadurch die Gefahr von Markierungen herbeiführen.The dryer fabric according to the US has a simpler structure 4,829,681. In one embodiment, all are Cross threads formed as flat cross threads by the Longitudinal threads are integrated. The longitudinal threads also have an inverted U-shaped cross section. However, this cross section ensures high rigidity the longitudinal threads with the result that the longitudinal threads a produce a very bumpy surface on the paper side and thereby create the danger of markings.

Aus der EP 0 580 478 A1 ist ein Trockensieb bekannt, das aus einem Gewebe aus Längs- und Querfäden besteht, wobei die Querfäden ein papierseitiges Fadensystem aus Flachquerfäden und ein maschinenseitiges Fadensystem aus Rundquerfäden ausbilden, jeweils ein Rundquerfaden an der Maschinenseite an den Flachquerfäden anliegt und jeweils ein Flachquerfaden und sein an ihm anliegender Rundquerfaden von den Längsfäden gemeinsam eingebunden sind.From EP 0 580 478 A1 a dryer fabric is known which consists of a fabric consists of longitudinal and transverse threads, the transverse threads being a paper side Thread system made of flat cross threads and a machine-side thread system Form round cross threads, one round cross thread each on the machine side the flat cross threads and each have a flat cross thread and be on it adjacent cross thread are integrated together by the longitudinal threads.

Der Erfindung liegt die Aufgabe zugrunde, eine Papiermaschinenbespannung der eingangs genannten Art so zu gestalten, daß es trotz glatter Oberfläche einen einfachen Aufbau hat und demgemäß kostengünstig hergestellt werden kann.The invention has for its object a paper machine clothing of the type mentioned at the beginning that despite a smooth surface it is a simple one Has structure and can be manufactured inexpensively can.

Diese Aufgabe wird bei einer Ausführungsform mit papierseitigen Flachquerfäden und maschinenseitigen Rundquerfäden erfindungsgemäß dadurch gelöst, daß jeweils wenigstens zwei Rundquerfäden an der Maschinenseite an wenigstens einem Teil der Flachquerfäden anliegen und jeweils ein Flachquerfaden und seine an ihm anliegenden Rundquerfäden von zumindest einem Teil der Längsfäden gemeinsam eingebunden sind. Grundgedanke der Erfindung ist es somit, die Flachquerfäden durch Rundquerfäden zu unterstüt-zen und hierdurch die Dimensionsstabilität zu verbessern. Dabei zeichnet sich die erfindungsgemäße Papiermaschinenbespannung durch einfachen Aufbau aus.This task is accomplished in an embodiment with paper-side Flat cross threads and machine-side round cross threads solved according to the invention in that in each case at least at least two round cross threads on the machine side part of the flat cross threads and each a flat cross thread and its round cross threads attached to it shared by at least part of the longitudinal threads are involved. The basic idea of the invention is therefore to support the flat cross threads with round cross threads and thereby improve the dimensional stability. The paper machine clothing according to the invention is distinguished through simple construction.

Es ist nicht notwendig, daß die an einem Flachquerfaden maschinenseitig anliegenden Rundquerfäden aneinanderliegen. Eine Verschiebung der Rundquerfäden gegenüber den Flachquerfäden wird jedoch reduziert, wenn die Rundquerfäden sich gegenseitig berühren. Dabei sollte die Summe der Durchmesser der Rundquerfäden, die an einem Flachquerfaden anliegen, nicht größer sein als dessen Erstrekkung in Längsrichtung, damit die Rundquerfäden nicht über die Flachquerfäden überstehen.It is not necessary that on a flat cross thread Round cross threads lying on the machine side lie against each other. A shift of the round cross threads compared to the Flat cross threads, however, is reduced when the round cross threads touch each other. The sum should the diameter of the round cross threads on a flat cross thread not be greater than its extent lengthways so that the round cross threads do not have the flat transverse threads survive.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß neben den Flachquerfäden und den an ihnen anliegenden Rundquerfäden keine weiteren Querfäden vorhanden sind, also immer eine Kombination aus Flach- und diese unterstützenden Rundquerfäden vorhanden ist. Alternativ dazu kann jedoch auch vorgesehen sein, daß ein Teil der Längsfäden die Flachquerfäden nur papierseitig einbindet und ansonsten nur mit Rundquerfäden einbindet, die zwischen den an den Flachquerfäden anliegenden Rundquerfäden verlaufen.In a further embodiment of the invention, that next to the flat cross threads and the ones attached to them Round cross threads there are no further cross threads, So always a combination of flat and supportive Round cross threads is present. Alternatively However, it can also be provided that part of the longitudinal threads the flat cross threads only binds on the paper side and otherwise only integrates with circular cross threads between the round transverse threads resting on the flat transverse threads.

Die Flachquerfäden haben zweckmäßigerweise eine Erstrekkung in Längsrichtung (Laufrichtung) der Papiermaschinenbespannung von 1 bis 25 mm, vorzugsweise 10 bis 15 mm, und in Dickenrichtung (quer zur Ebene der Papiermaschinenbespannung) von 0,2 mm bis 1 mm. Definitionsgemäß fallen unter den Begriff "Flachquerfäden" jedoch immer nur solche, bei denen die Dicke geringer ist als die Erstrekkung in Längsrichtung der Papiermaschinenbespannung.The flat transverse threads expediently have an extension in the longitudinal direction (running direction) of the paper machine clothing from 1 to 25 mm, preferably 10 to 15 mm, and in the thickness direction (across the plane of the paper machine clothing) from 0.2 mm to 1 mm. Fall by definition but always only under the term "flat cross threads" those where the thickness is less than the extension in the longitudinal direction of the paper machine clothing.

Die gestellte Aufgabe wird erfindungsgemäß in analoger Weise auch dadurch gelöst, daß wenigstens ein Teil der Querfäden als Flachquerfaden ausgebildet ist, an denen jeweils maschinenseitig vorspringende Längsstege angeformt sind, wobei die Längsstege sich in Richtung der Längsachse der Flachquerfäden erstrecken. Auch diese Maßnahme dient der Dimensionsstabilität der Querfäden und sorgt dafür, daß die glatte papierseitige Oberfläche der Flachquerfäden möglichst eben bleibt und damit die Papierbahn großflächig unterstützt. Die Herstellung solcher Flachquerfäden kann durch Extrudierung des verwendeten Kunststoffmaterials geschehen.According to the invention, the task set is analogous Way also solved in that at least part of the Cross threads is formed as a flat cross thread on which protruding longitudinal webs are formed on the machine, the longitudinal webs in the direction of the longitudinal axis of the Extend flat cross threads. This measure also serves Dimensional stability of the cross threads and ensures that the smooth paper-side surface of the flat cross threads remains as flat as possible and thus the paper web over a large area supported. The production of such flat cross threads can by extruding the plastic material used happen.

Die Längsstege können den jeweiligen Anforderungen und den Herstellungsmöglichkeiten angepaßt werden und in diesem Rahmen beliebigen Querschnitt haben. In Frage kommen insbesondere rechteckige, trapezförmige und/oder runde Querschnitte. Die Anzahl der Längsstege ist prinzipiell nicht begrenzt. Besonders günstige Verhältnisse ergeben sich, wenn nebeneinander zwei oder drei Längsstege ausgeformt sind.The longitudinal webs can meet the respective requirements and be adapted to the manufacturing possibilities and in this Frames have any cross-section. Come into question in particular rectangular, trapezoidal and / or round Cross-sections. The number of longitudinal webs is in principle not limited. Particularly favorable conditions result itself when two or three longitudinal webs are formed side by side are.

Auch die Längsfäden können als Flachfäden ausgebildet sein. Hier sollte die Erstreckung in Querrichtung der Papiermaschinenbespannung (Breite) von 0,5 bis 5 mm und in Dickenrichtung von 0,2 bis 1 mm gehen. The longitudinal threads can also be formed as flat threads his. Here should extend in the transverse direction of the paper machine clothing (Width) from 0.5 to 5 mm and in Thickness direction go from 0.2 to 1 mm.

Um eine Verschiebung der Rundquerfäden gegenüber den von ihnen unterstützten Flachquerfäden weitgehend zu vermeiden, sollten die Längsfäden jeweils nur einen Flachquerfaden einbinden, also etwa nach Art einer Leinwandbindung, sieht man die Kombination aus Flach- und Rundquerfäden als eine Einheit an.In order to shift the round transverse threads compared to that of to largely avoid supported flat cross threads, the longitudinal threads should only have one flat transverse thread each embed, like a plain weave, you can see the combination of flat and round cross threads as a unit.

Schließlich ist gemäß der Erfindung vorgesehen, daß bei zumindest einem Teil der Längsfäden, vorzugsweise bei allen Längsfäden jeweils zwei benachbarte Längsfäden ein Längsfadenpaar bilden, dessen Längsfäden gleichbindig mit den Querfäden einbinden. Hierdurch ergibt sich in Kombination mit den Flachquerfäden eine breite und glatte Unterstützungsbasis für die Papierbahn.Finally, according to the invention it is provided that at at least part of the longitudinal threads, preferably all Longitudinal threads each have two adjacent longitudinal threads Form a pair of longitudinal threads, the longitudinal threads of which are tied with tie in the cross threads. This results in combination with the flat cross threads a broad and smooth support base for the paper web.

Als Materialien für die Längsfäden kommen insbesondere hydrolyse-stabilisiertes Polyester PET, PPS, PEEK und PCTA in Frage. Für die Querfäden sind insbesondere die Materialien hydrolyse-stabilisiertes Polyester PET, PPS, Polysulfon, PEEK, PCTA und PEN geeignet.In particular, come as materials for the longitudinal threads hydrolysis-stabilized polyester PET, PPS, PEEK and PCTA in question. For the cross threads are especially the Materials hydrolysis-stabilized polyester PET, PPS, Suitable for polysulfone, PEEK, PCTA and PEN.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispiels näher veranschaulicht. Es zeigen:

Fig. 1
eine Draufsicht auf den Endabschnitt eines Trockensiebes;
Fig. 2
einen Längsschnitt durch den Ausschnitt gemäß Fig. 1;
Fig. 3
einen Längsschnitt durch ein Trockensieb, das gegenüber dem Trockensieb gemäß den Figuren 1 und 2 bezüglich der Querfäden abgewandelt ist.
In the drawing, the invention is illustrated in more detail using an exemplary embodiment. Show it:
Fig. 1
a plan view of the end portion of a dryer fabric;
Fig. 2
a longitudinal section through the section of FIG. 1;
Fig. 3
a longitudinal section through a dryer fabric, which is modified compared to the dryer fabric according to Figures 1 and 2 with respect to the transverse threads.

Aus der Draufsicht gemäß Fig. 1 ist zu erkennen, daß das Trockensieb 1 auf der Papierseite breite Flachquerfäden - beispielhaft mit 2 bezeichnet - aufweist, die von Längsfadenpaaren - beispielhaft mit 3 bezeichnet - eingebunden werden, wobei jedes Längsfadenpaar 3 aus zwei Längsfäden - beispielhaft mit 4, 5 bezeichnet - besteht, die innerhalb eines Längsfadenpaares 3 gleichbindig verlaufen. Die Längsfadenpaare 3 binden mit den Flachquerfäden 2 nach Art einer Leinwandbindung ein, d. h. sie binden papierseitig einen Flachquerfaden 2 und maschinenseitig den darauf folgenden Flachquerfaden 2 und dann wieder papierseitig den nachfolgenden Flachquerfaden 2 ein.From the top view of FIG. 1 it can be seen that the Dryer fabric 1 wide flat transverse threads on the paper side - designated by way of example with 2 - that of pairs of longitudinal threads - designated by way of example with 3 - involved be, each pair of longitudinal threads 3 from two longitudinal threads - exemplified with 4, 5 - exists within of a pair of longitudinal threads 3 run identically. The Longitudinal thread pairs 3 tie with the flat transverse threads 2 Type of plain weave, d. H. they bind on the paper side a flat cross thread 2 and the machine side then the flat cross thread 2 and then again on the paper side the following flat cross thread 2.

Das Einbinden der Längsfäden 4, 5 mit den Flachquerfäden 2 ist noch deutlicher Fig. 2 zu entnehmen. In dieser Figur ist zu erkennen, daß an der Unterseite der Flachquerfäden 2 jeweils zwei Rundquerfäden - beispielhaft mit 6, 7 bezeichnet - anliegen und jene paarweise unterstützen. Eine Verschiebung der Rundquerfäden 6, 7 relativ zu den Flachquerfäden 2 wird durch die wechselweise Einbindung der Flachquerfäden 2 und den zugehörigen Rundquerfäden 6, 7 durch die Längsfadenpaare 3 vermieden.The incorporation of the longitudinal threads 4, 5 with the flat transverse threads 2 can be seen even more clearly in FIG. 2. In this Figure can be seen that on the underside of the flat transverse threads 2 two round cross threads each - for example with 6, 7 denotes - concern and support them in pairs. A displacement of the circular cross threads 6, 7 relative to the flat cross threads 2 is due to the alternate integration the flat cross threads 2 and the associated round cross threads 6, 7 avoided by the longitudinal thread pairs 3.

Die Längsfäden 4, 5 der Längsfadenpaare 3 bilden in der Version unterhalb der strichpunktierten Linie an der Stirnkante 8 des Trockensiebes 1 große Schlaufen - beispielhaft mit 9 bezeichnet - und kleine Schlaufen - beispielhaft mit 10 bezeichnet - aus. Die großen Schlaufen 9 wechseln sich mit kleinen Schlaufen 10 ab. Die Version oberhalb der strichpunktierten Linie bildet nur große Schlaufen 9 aus. Es versteht sich, daß durch diese Darstellung zwei verschiedene Arten von Stirnkanten 8 gezeigt werden sollen, daß jedoch bei einem Trockensieb nur eine Schlaufenversion vorhanden ist. Die großen Schlaufen 9 bilden Schlaufenösen 11 aus, wobei diese Schlaufen 9 mit entsprechenden großen Schlaufen an der anderen Stirnkante des Trockensiebes 1 so in Überlappung gebracht werden können, daß sämtliche Schlaufenösen 11 fluchten und damit einen Kanal bilden, durch den in an sich bekannter Weise ein Steckdraht zur Verbindung der Stirnkanten 8 unter Bildung einer sogenannten Steckdrahtnaht geschoben werden kann.The longitudinal threads 4, 5 of the longitudinal thread pairs 3 form in the Version below the dash-dotted line on the Front edge 8 of the dryer fabric 1 large loops - exemplary designated 9 - and small loops - exemplary designated with 10 - from. The big loops 9 take turns with small loops 10. The version above the dash-dotted line forms only large ones Loops 9 out. It is understood that through this representation two different types of front edges 8 are shown should be that only with a dryer a loop version is available. The big loops 9 form loop eyelets 11, these loops 9 with corresponding large loops on the other front edge of the dryer fabric 1 are thus overlapped can that all loop eyelets 11 are aligned and thus form a channel through which is known per se Way a plug wire for connecting the front edges 8th pushed to form a so-called plug wire seam can be.

Die Besonderheit der Schlaufenbildung besteht vorliegend darin, daß ein Längsfaden 4 eines Längsfadenpaares 3 nach. der Schlaufenbildung in der Weise zurückgewebt wird, daß er den benachbarten Längsfaden 12 des benachbarten Längsfadenpaares 13 bildet. Entsprechendes gilt für den Längsfaden 5 des Längsfadenpaares 3, d. h. durch die Schlaufenbildung wird er zum benachbarten Längsfaden 14 des benachbarten Längsfadenpaares 15. Hierdurch ergibt sich eine nur geringe Verwindung der Schlaufen 9, 10 und ein auf der Papierseite sehr gleichmäßiges Warenbild des Trockensiebes 1. The peculiarity of the loop formation exists here in that a longitudinal thread 4 of a pair of longitudinal threads 3 after. the loop formation is woven back in such a way that he the adjacent longitudinal thread 12 of the adjacent pair of longitudinal threads 13 forms. The same applies to the longitudinal thread 5 of the pair of longitudinal threads 3, d. H. through the formation of loops it becomes the adjacent longitudinal thread 14 of the adjacent pair of longitudinal threads 15. This results in a small twist of the loops 9, 10 and a on the paper side very uniform product image of the Dryer screen 1.

Das in Figur 3 dargestellte Trockensieb 21 unterscheidet sich von dem Trockensieb 1 gemäß den Figuren 1 und 2 lediglich durch die Gestaltung der beispielhaft mit 22 bezeichneten Querfäden. Diese Querfäden 22 sind als einstückige Formstränge ausgebildet. Jeder Querfaden 22 hat papierseitig einen Flachquerfaden 23, an dessen Maschinenseite nebeneinander zwei Längsstege 24, 25 angeformt sind. Die Längsstege 24, 25 haben im wesentlichen kreisförmigen Querschnitt und vergrößern die Biegesteifigkeit des jeweils zugehörigen Flachquerfadens 23.The dryer fabric 21 shown in FIG. 3 differs differs from the dryer 1 according to FIGS. 1 and 2 only through the design of the example designated 22 Cross threads. These cross threads 22 are in one piece Molded strands formed. Each cross thread 22 has a flat transverse thread 23 on the paper side, on the machine side thereof two longitudinal webs 24, 25 are formed side by side are. The longitudinal webs 24, 25 have an essentially circular shape Cross section and increase the bending stiffness of the associated flat transverse thread 23.

Die Querfäden 22 werden von Längsfäden 26 in der gleichen Weise eingebunden wie die Kombination aus Flachquerfäden 2 und maschinenseitig anliegenden Rundquerfäden 6, 7 bei dem Trockensieb 1 gemäß den Figuren 1 und 2.The cross threads 22 are of longitudinal threads 26 in the same Integrated like the combination of flat cross threads 2 and machine-side round transverse threads 6, 7 at the dryer fabric 1 according to FIGS. 1 and 2.

Claims (13)

  1. A papermaking fabric, in particular a dryer cloth (1) with a paper side provided to receive a paper web and a machine side facing away therefrom, the papermaking fabric (1) having or consisting of an interwoven structure of warp and weft yams (2, 4, 5, 6, 7, 12, 14) and the weft yams forming on the paper side a system of flat weft yarns (2) and on the machine side a system of round weft yarns (6, 7), characterised in that at least two round weft yarns (6, 7) together abut on the machine side against at least some of the flat weft yams (2) and in each case one flat weft yam (2) and the round weft yams (6, 7) abutting against it are jointly interlaced with at least some of the warp yarns (4, 5, 12, 14).
  2. A papermaking fabric according to Claim 1, characterised in that the round weft yams (6, 7) abutting on the machine side against one flat weft yam (2) abut against each other.
  3. A papermaking fabric of according to Claim 1 or 2, characterised in that the sum of the diameters of the round weft yams (6, 7) abutting against one flat warp yam (2) is not greater than the extension of said flat warp yam (2) in the longitudinal direction of the papermaking fabric (1).
  4. A papermaking fabric according to one of the claims 1 to 3, characterised in that apart from the flat weft yams (2) and the round weft yams (6, 7) abutting against them no further weft yams are present.
  5. A papermaking fabric according to one of the claims 1 to 3, characterised in that some of the warp yams bind in the flat weft yams only on the paper side and otherwise are interlaced only with round weft yams which run between the round weft yams abutting against the flat weft yams.
  6. A papermaking fabric, in particular a dryer cloth (21), with a paper side provided to receive a paper web and a machine side facing away therefrom, the papermaking fabric (1) having or consisting of an interwoven structure of warp and weft yams (22, 26), characterised in that at least some of the weft yarns (22) are formed as flat weft yarns (23) on each of which projecting longitudinal ribs (24, 25) are formed.
  7. A papermaking fabric according to Claim 6, characterised in that the longitudinal ribs (24, 25) have a rectangular, trapezoidal and/or round cross-section.
  8. A papermaking fabric according to Claim 6 or 7, characterised in that two or three longitudinal ribs (24, 25) are formed side-by-side.
  9. A papermaking fabric according to one of the claims 1 to 8, characterised in that the flat weft yams (23) have an extension in the longitudinal direction of the papermaking fabric (1) of 1 to 25 mm, and preferably of 10 to 15 mm, and a thickness of 0.2 to 1 mm.
  10. A papermaking fabric according to one of the claims 1 to 9, characterised in that the warp yams (4, 5, 12, 14, 26) are formed as flat warp yams.
  11. A papermaking fabric according to Claim 10, characterised in that the flat warp yams (4, 5, 12, 14, 26) have an extension in the transverse direction of the papermaking fabric of 0.5 to 5 mm and a thickness of 0.2 to 1 mm.
  12. A papermaking fabric according to one of the claims 1 to 11, characterised in that the warp yams (4, 5, 12, 14, 26) are interlaced with only one flat weft yam in each loop (2).
  13. A papermaking fabric according to one of the claims 1 to 12, characterised in that in the case of at least some of the warp yams (4, 5, 12, 14, 26) two adjacent warp yarns (4,5) form a pair (3, 13, 15) of warp yarns, the warp yarns (4, 5) of which pair are interlaced with the weft yams (2, 6, 7, 22) in the same weave pattern.
EP00108202A 1999-05-20 2000-04-14 Papermaking fabric, in particular a dryer cloth Expired - Lifetime EP1054098B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29908887U 1999-05-20
DE29908887U DE29908887U1 (en) 1999-05-20 1999-05-20 Paper machine clothing, especially as a dryer fabric

Publications (2)

Publication Number Publication Date
EP1054098A1 EP1054098A1 (en) 2000-11-22
EP1054098B1 true EP1054098B1 (en) 2002-06-05

Family

ID=8073766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108202A Expired - Lifetime EP1054098B1 (en) 1999-05-20 2000-04-14 Papermaking fabric, in particular a dryer cloth

Country Status (7)

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US (1) US6378565B1 (en)
EP (1) EP1054098B1 (en)
AT (1) ATE218646T1 (en)
CA (1) CA2308926C (en)
DE (2) DE29908887U1 (en)
ES (1) ES2177492T3 (en)
PT (1) PT1054098E (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006022235A1 (en) * 2006-05-12 2007-11-15 Voith Patent Gmbh Papermakers dryer
JP6793546B2 (en) 2013-11-14 2020-12-02 ジーピーシーピー アイピー ホールディングス エルエルシー Flexible absorbent sheet with high absorbency and high caliper

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3167281A (en) * 1962-06-13 1965-01-26 Cheney Bigelow Wire Works Inc Fourdrinier wire cloth
US4633596A (en) * 1981-09-01 1987-01-06 Albany International Corp. Paper machine clothing
US4829681A (en) 1983-02-10 1989-05-16 Albany International Corp. Paper machine clothing
FR2560242B1 (en) 1984-02-29 1986-07-04 Asten Fabriques Feutres Papete CANVAS, PARTICULARLY FOR PAPER MACHINES, AND PROCESS FOR PREPARING THE SAME
FR2693747B1 (en) * 1992-07-15 1994-08-19 Feutres Papeteries Tissus Indl Asymmetric stationery fabric and paper making device using such fabric.
GB9609761D0 (en) * 1996-05-10 1996-07-17 Jwi Ltd Low air permeability papermaking fabric including flattened secondary weft yarns and pin seam
US5713398A (en) * 1996-12-02 1998-02-03 Albany International Corp. Papermaker's fabric having paired different machine-direction yarns weaving as one

Also Published As

Publication number Publication date
PT1054098E (en) 2002-10-31
DE50000197D1 (en) 2002-07-11
ES2177492T3 (en) 2002-12-16
DE29908887U1 (en) 2000-07-06
CA2308926C (en) 2008-11-25
ATE218646T1 (en) 2002-06-15
EP1054098A1 (en) 2000-11-22
US6378565B1 (en) 2002-04-30
CA2308926A1 (en) 2000-11-20

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