EP0263482B1 - Fabric for the wet end of a paper-making machine - Google Patents

Fabric for the wet end of a paper-making machine Download PDF

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Publication number
EP0263482B1
EP0263482B1 EP19870114565 EP87114565A EP0263482B1 EP 0263482 B1 EP0263482 B1 EP 0263482B1 EP 19870114565 EP19870114565 EP 19870114565 EP 87114565 A EP87114565 A EP 87114565A EP 0263482 B1 EP0263482 B1 EP 0263482B1
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EP
European Patent Office
Prior art keywords
transverse threads
threads
additional
fabric
paper side
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP19870114565
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German (de)
French (fr)
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EP0263482A1 (en
Inventor
Georg Dip.-Ing. Borel
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Herman Wangner GmbH and Co KG
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Herman Wangner GmbH and Co KG
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Priority to AT87114565T priority Critical patent/ATE62946T1/en
Publication of EP0263482A1 publication Critical patent/EP0263482A1/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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
    • Y10T442/3195—Three-dimensional weave [e.g., x-y-z planes, multi-planar warps and/or wefts, etc.]
    • Y10T442/3203—Multi-planar warp layers

Definitions

  • the invention relates to a covering for the sheet-forming part of a paper machine with a double-layer or multi-layer fabric made of interwoven longitudinal threads and transverse threads and with additional transverse threads floating on the paper side.
  • the additional sheet threads floating on the paper side are said to improve sheet removal, reduce the risk of marking and increase permeability.
  • the additional transverse threads are woven in such a way that they are bent as little as possible. As a result, however, they protrude so far on the paper side that they interfere with sheet formation. When cleaning the fabric by high pressure water jets protruding threads are often destroyed.
  • the invention has for its object to provide a covering of the type mentioned for the sheet formation area of a paper machine, in which the risk of destruction of transverse threads is reduced when cleaning with high pressure water jets.
  • the additional floating cross threads are preferably tied so deep that their entire cross-section at the tying point is lower than the normal cross threads involved in the formation of the paper side at its deepest point.
  • a prerequisite for the deep integration of the additional transverse threads is generally that the additional transverse thread is wrapped in a longitudinal thread in the sense that at least some of the longitudinal threads incorporating the additional transverse threads run under one or both of the adjacent transverse threads on the paper side.
  • the additional floating floating threads preferably consist of a particularly soft, stretchy material.
  • the covering can be flat or endlessly woven.
  • the threads consist of plastic monofilaments, a material with a higher modulus of elasticity being generally chosen for the longitudinal threads than for the transverse threads.
  • the threads can also consist of plastic multifilaments, in particular in the case of an endless weave.
  • the additional floating cross threads preferably have a smaller diameter than the normal cross threads.
  • Fig. 1 shows in cross section a double-layer, eight-shaft fabric.
  • a double-layer fabric is understood to be a fabric that contains two layers of transverse threads that are interwoven with a single system of longitudinal threads.
  • the top or paper side of the fabric is formed by interwoven longitudinal threads 1 and upper transverse threads 2.
  • a lower transverse thread 5 is assigned to each upper transverse thread 2, so that the transverse threads are arranged in pairs.
  • the longitudinal threads 1 are also interwoven with the lower transverse threads 5.
  • the lower transverse threads 5 have very long floats which project downwards and form the running side of the paper machine clothing. Since the lower transverse threads 5 are particularly strongly exposed to abrasion, they expediently have a larger diameter than the upper transverse threads 2 and in some cases consist of a particularly abrasion-resistant material, for example polyamide and polyester in alternation.
  • the longitudinal threads 1 bind both with the upper transverse threads 2 and with the lower transverse threads 5, they run partly on the paper side and partly on the running side of the fabric. Between the points at which the longitudinal threads 1 are interwoven with the upper and lower transverse threads 2 and 5, they also tie additional transverse threads 3.
  • the transverse threads 3 run, apart from the binding points with the longitudinal threads 1, on the paper side of the fabric. They form long floats.
  • FIG. 1 has an eight-part weave, with each weave repeat containing eight longitudinal threads and sixteen normal transverse threads 2, 5 and eight additional transverse threads 3.
  • the floats of the additional transverse threads 3 extend over six longitudinal threads 1.
  • the additional transverse thread 3 which is deeply embedded in the fabric, is pressed out laterally from the middle of the stitch. In the embodiment of FIG. 2, this is prevented by the additional transverse thread 3 being looped around by two longitudinal threads 1 at each of its binding points. The float of the transverse threads 3 extends over five longitudinal threads 1 in each case.
  • the base fabric ie the weave pattern of the longitudinal threads 1 and the upper and lower transverse threads 2, 5 has a seven-strand structure.
  • the additional transverse threads 3 are, however, only interwoven with every fourteenth longitudinal thread 1, ie they are only tied in every second repeat of the base fabric.
  • FIG. 4 corresponds to that of FIG. 3 with regard to the base fabric.
  • the additional transverse threads 3 have floats of alternating four and six longitudinal threads 1.
  • the non-uniform length of the floats of the additional transverse threads 3 improves the marking properties.
  • the non-uniform length of the floatations results from the fact that the additional transverse threads 3 alternately bind with different longitudinal threads 1, e.g. alternating with the first and the second longitudinal thread of a repeat.
  • Examples 1 and 2 below relate to an openly woven covering for the sheet-forming part of a paper machine, so that the longitudinal threads are formed by the warp and the transverse threads by the weft.
  • the base fabric is double-layered in an eight-part weave.
  • Warp run The warp wire 1 is passed over two weft pairs 2, 5, then between two weft pairs 2, 5, under one weft pair 2, 5 and finally between three weft pairs 2, 5, comes again on the paper side and repeats the repeat (see Fig. 6).
  • the floats of chain 1 on the paper side have an octagonal Atlas distribution (see Fig. 5).
  • the fabric was woven with a warp density of 38 wires / cm. After fixing, the warp count is compressed to 42 wires / cm by the cross shrinkage of the fabric.
  • the chain is made of monofilament polyester, ⁇ 0.30 mm.
  • the material is longitudinally stable, i.e. it has a high modulus of elasticity.
  • the weft wires of the top layer have a density of 14 wires / cm when weaving. After fixing it has that Fabric 13.5 weft wires / cm.
  • the shot diameter is 0.30 mm.
  • the weft wires 5 of the barrel side are woven so that they lie precisely under the weft wires 2 of the upper layer.
  • they are polyester monofilament, ⁇ 0.32 mm, of the same type as the weft of the upper layer and made of polyamide monofilament, also ⁇ 0.32 mm of type Pa 6.6.
  • weft wires 3 made of polyester monofilament, ⁇ 0.15 mm, of the same soft Trevira 900 wire type as the other weft wires are woven into the upper layer.
  • the course of the additional weft wire 3 corresponds to Figure 1, i.e. the additional weft runs over six warp wires 1 and under two warp wires 1.
  • the additional weft wire 3 lies in the plane of the lower weft wires 5.
  • the fixed fabric has an elongation of 0.6% under a load of 100 N / cm and an air permeability of 8000 m3 / m2 / h.
  • the warp floats and the floats of the normal weft wire 2 and the additional weft 3 lie in one plane.
  • the weft wires 5 are 15.5 / 100 mm deeper than the warp bend. This means that the fabric is a weft runner. Only when 15.5 / 100 mm thickness is used does the bottom part of the warp threads come into contact with the paper machine for the first time. This means that the warp threads start to wear at this point.
  • FIG. 1 shows, the tying point of the additional weft 3 is hidden so far inside the screen that the additional weft is not touched by the abrasion, even though it has been tied down low.
  • This octagonal double-layer sieve is used for the production of cardboard. Because of the high retention capacity, the sieve is also advantageous for the production of packaging paper and similar heavyweight types of paper for the packaging sector.
  • the fabric has 14 shafts and the chain 1 runs over two weft pairs 2, 5 between one weft pair 2, 5, under one weft pair 2, 5 and between three weft pairs 2, 5.
  • the paper side has 7-strand satin distribution of the warp floats. With warp 1, 54 wires / cm are counted during weaving, after heat-setting it is 60 wires / cm.
  • the warp wires are made of polyester monofilament, ⁇ 0.17 mm, and are made of longitudinally stable wire quality with a high modulus of elasticity.
  • the weft wires 2 of the upper layer are made of polyester monofilament, ⁇ 0.17 mm, type Trevira 901, and have a medium modulus of elasticity (elongation 19% at a load of 27 cN / tex). 19 weft wires / cm are woven, in the finished sieve 17.5 cm normal weft wires are counted.
  • the sieve On the running side, the sieve has 19 weft wires 5, ⁇ 0.20 mm, half made of polyester, soft quality Type 900 (23.4% elongation at a load of 27 cN / tex), the other half made of polyamide Type 6.6 .
  • an additional weft with a 14-strand wire course according to FIG. 3 is woven.
  • the additional shot is also made of polyester, the soft type 900, and has a diameter of 0.12 mm.
  • the structure of the basic fabric is actually 7 shafts, the additional weft wires are not bound by the chain after every 7 shafts repeat, but only after every 14th warp wire.
  • the warp wires, the weft wires and the additional weft wires are all in one plane.
  • the weft is 9/100 mm lower in relation to the chain, i.e. the sieve is a weft runner.
  • the screen according to example 2 has a finely structured surface structure, it is mainly used for marking-sensitive writing and printing papers.

Abstract

The fabric for the sheet forming section of a paper making machine includes a double-layer or multi-layer fabric of interwoven longitudinal and transverse threads and additional transverse threads floating on the paper supporting side. The additional transverse threads are interwoven in a plane disposed below the plane formed by the transverse threads of the paper supporting side. The additional transverse threads preferably have a smaller diameter than the ordinary transverse threads.

Description

Die Erfindung betrifft eine Bespannung für den Blattbildungsteil einer Papiermaschine mit einem doppellagigen oder mehrlagigen Gewebe aus miteinander verwobenen Längsfäden und Querfäden und mit zusätzlichen, auf der Papierseite flottierenden Querfäden.The invention relates to a covering for the sheet-forming part of a paper machine with a double-layer or multi-layer fabric made of interwoven longitudinal threads and transverse threads and with additional transverse threads floating on the paper side.

Papiermaschinenbespannungen mit zusätzlichen, auf der Papierseite flottierenden Querfäden sind aus US-A-4,182,381 und 4,281,688 und aus EP-A-85 363 bekannt. Nach US-A-4,182,381 soll durch die zusätzlichen Querfäden die Abnutzung insbesondere im Bereich einer Stecknaht vermindert werden. Nach US-A-4,281,688 werden die Querfäden so eingewoben, daß sich auf der Papierseite und auf der Laufseite gleichlange Flottierungen ergeben, wodurch ein Einrollen der Ränder verhindert werden soll.Paper machine clothing with additional transverse threads floating on the paper side are known from US-A-4,182,381 and 4,281,688 and from EP-A-85 363. According to US Pat. No. 4,182,381, the additional transverse threads are intended to reduce wear, particularly in the area of a pin seam. According to US-A-4,281,688, the transverse threads are woven in such a way that floats of the same length result on the paper side and on the running side, thereby preventing the edges from curling up.

Nach EP-A-85 363 soll durch die zusätzlichen, auf der Papierseite flottierenden Querfäden die Blattabnahme verbessert, die Markierungsgefahr verringert und die Durchlässigkeit vergrößert werden. Die zusätzlichen Querfäden werden dabei so eingewoben, daß sie möglichst wenig abgekröpft werden. Dadurch stehen sie jedoch auf der Papierseite soweit vor, daß sie die Blattbildung stören. Bei der Reinigung des Gewebes durch Hochdruckwasserstrahlen werden herausstehende Fäden häufig zerstört.According to EP-A-85 363, the additional sheet threads floating on the paper side are said to improve sheet removal, reduce the risk of marking and increase permeability. The additional transverse threads are woven in such a way that they are bent as little as possible. As a result, however, they protrude so far on the paper side that they interfere with sheet formation. When cleaning the fabric by high pressure water jets protruding threads are often destroyed.

Der Erfindung liegt die Aufgabe zugrunde, eine Bespannung der eingangs genannten Art für den Blattbildungsbereich einer Papiermaschine zu schaffen, bei der die Gefahr einer Zerstörung von Querfäden bei der Reinigung mit Hochdruckwasserstrahlen vermindert ist.The invention has for its object to provide a covering of the type mentioned for the sheet formation area of a paper machine, in which the risk of destruction of transverse threads is reduced when cleaning with high pressure water jets.

Diese Aufgabe wird dadurch gelöst, daß die zusätzlichen, auf der Papierseite flottierenden Querfäden unterhalb der Ebene eingebunden sind, die durch die Querfäden der Papierseite gebildet wird.This object is achieved in that the additional transverse threads floating on the paper side are integrated below the plane which is formed by the transverse threads on the paper side.

Vorzugsweise werden die zusätzlichen, flottierenden Querfäden so tief abgebunden, daß ihr gesamter Querschnitt an der Abbindestelle tiefer liegt als die normalen, an der Bildung der Papierseite beteiligten Querfäden an ihrer tiefsten Stelle. Voraussetzung für die tiefe Einbindung der zusätzlichen Querfäden ist dabei im allgemeinen, daß der zusätzliche Querfaden von einem Längsfaden in dem Sinne umschlungen wird, daß zumindest ein Teil der die zusätzlichen Querfäden einbindenden Längsfäden unter einem oder beiden der danebenliegenden Querfäden der Papierseite verläuft. Vorzugsweise bestehen die zusätzlichen, flottierenden Querfäden aus besonders weichem, dehnungsfreudigem Material.The additional floating cross threads are preferably tied so deep that their entire cross-section at the tying point is lower than the normal cross threads involved in the formation of the paper side at its deepest point. A prerequisite for the deep integration of the additional transverse threads is generally that the additional transverse thread is wrapped in a longitudinal thread in the sense that at least some of the longitudinal threads incorporating the additional transverse threads run under one or both of the adjacent transverse threads on the paper side. The additional floating floating threads preferably consist of a particularly soft, stretchy material.

Die Bespannung kann flach oder endlos gewebt sein. Wie üblich bestehen die Fäden aus Kunststoff-Monofilen, wobei für die Längsfäden im allgemeinen ein Material mit höherem Elastizitätsmodul gewählt wird als für die Querfäden. Insbesondere bei endloser Webart können die Fäden auch aus Kunststoff-Multifilamenten bestehen. Die zusätzlichen, flottierenden Querfäden haben vorzugsweise einen kleineren Durchmesser als die normalen Querfäden.The covering can be flat or endlessly woven. As usual, the threads consist of plastic monofilaments, a material with a higher modulus of elasticity being generally chosen for the longitudinal threads than for the transverse threads. The threads can also consist of plastic multifilaments, in particular in the case of an endless weave. The additional floating cross threads preferably have a smaller diameter than the normal cross threads.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung erläutert. Es zeigen:

Fig. 1
bis 4 verschiedene Ausführungsbeispiele der Erfindung im Querschnitt entlang eines zusätzlichen Querfadens, wobei in den Figuren 2 und 4 nur der Verlauf des zusätzlichen Querfadens dargestellt ist;
Fig. 5
das Webbild von Beispiel 1, wobei der Pfeil die Laufrichtung der Kett- oder Längsfäden angibt, die schwarzausgefüllten Kästchen bedeuten, daß die Kette auf der Papierseite sichtbar ist, an den übrigen Kreuzungspunkten auf der Papierseite die Schuß- oder Querfäden sichtbar sind und das Kreuz in einigen der Kästchen wiederum angibt, daß die Kette auf der Laufseite sichtbar ist, also unter einem Schußdrahtpaar verläuft, und
Fig. 6
den Verlauf des Längsfadens in Beispiel 1.
Embodiments of the invention are explained below with reference to the drawing. Show it:
Fig. 1
to 4 different embodiments of the invention in cross section along an additional transverse thread, only the course of the additional transverse thread is shown in Figures 2 and 4;
Fig. 5
the weave image of Example 1, the arrow indicating the direction of the warp or longitudinal threads, the black filled boxes mean that the chain is visible on the paper side, the weft or cross threads are visible at the other crossing points on the paper side and the cross in some of the boxes in turn indicate that the chain is visible on the running side, that is, runs under a pair of weft wires, and
Fig. 6
the course of the longitudinal thread in Example 1.

Fig. 1 zeigt im Querschnitt ein doppellagiges, achtschäftiges Gewebe. Unter doppellagigem Gewebe wird hierbei ein Gewebe verstan den, das zwei Lagen von Querfäden enthält, die mit einem einzigen System von Längsfäden verwoben sind. Die Oberseite oder Papierseite des Gewebes wird durch miteinander verwobene Längsfäden 1 und obere Querfäden 2 gebildet. Jedem oberem Querfaden 2 ist ein unterer Querfaden 5 zugeordnet, so daß die Querfäden paarweise angeordnet sind. Die Langsfäden 1 sind auch mit den unteren Querfäden 5 verwoben. Die unteren Querfäden 5 haben sehr lange, nach unten vorstehende Flottierungen, die die Laufseite der Papiermaschinenbespannung bilden. Da die unteren Querfäden 5 besonders stark dem Abrieb ausgesetzt sind, haben sie zweckmäßig einen größeren Durchmesser als die oberen Querfäden 2 und bestehen teilweise aus besonders abriebfestem Material, z B. Polyamid und Polyester im Wechsel.Fig. 1 shows in cross section a double-layer, eight-shaft fabric. A double-layer fabric is understood to be a fabric that contains two layers of transverse threads that are interwoven with a single system of longitudinal threads. The top or paper side of the fabric is formed by interwoven longitudinal threads 1 and upper transverse threads 2. A lower transverse thread 5 is assigned to each upper transverse thread 2, so that the transverse threads are arranged in pairs. The longitudinal threads 1 are also interwoven with the lower transverse threads 5. The lower transverse threads 5 have very long floats which project downwards and form the running side of the paper machine clothing. Since the lower transverse threads 5 are particularly strongly exposed to abrasion, they expediently have a larger diameter than the upper transverse threads 2 and in some cases consist of a particularly abrasion-resistant material, for example polyamide and polyester in alternation.

Da die Längsfäden 1 sowohl mit den oberen Querfäden 2 als auch mit den unteren Querfäden 5 abbinden, verlaufen sie teils auf der Papierseite, teils auf der Laufseite des Gewebes. Zwischen den Stellen, an denen die Längsfäden 1 mit den oberen und unteren Querfäden 2 und 5 verwoben sind, binden sie auch zusätzliche Querfäden 3 ab. Die Querfäden 3 verlaufen, abgesehen von den Abbindestellen mit den Längsfäden 1 auf der Papierseite des Gewebes. Sie bilden dabei lange Flottungen.Since the longitudinal threads 1 bind both with the upper transverse threads 2 and with the lower transverse threads 5, they run partly on the paper side and partly on the running side of the fabric. Between the points at which the longitudinal threads 1 are interwoven with the upper and lower transverse threads 2 and 5, they also tie additional transverse threads 3. The transverse threads 3 run, apart from the binding points with the longitudinal threads 1, on the paper side of the fabric. They form long floats.

Das Ausführungsbeispiel von Fig. 1 besitzt eine achtschäftige Bindung, wobei jeder Bindungsrapport acht Längsfäden und sechzehn normale Querfäden 2, 5 und acht zusätzliche Querfäden 3 enthält. Die Flottungen der zusätzlichen Querfäden 3 erstrecken sich dabei über sechs Längsfäden 1.The embodiment of FIG. 1 has an eight-part weave, with each weave repeat containing eight longitudinal threads and sixteen normal transverse threads 2, 5 and eight additional transverse threads 3. The floats of the additional transverse threads 3 extend over six longitudinal threads 1.

Bei manchen Bindungsmustern kann es vorkommen, daß der tief im Gewebe eingebundene zusätzliche Querfaden 3 seitlich aus der Maschenmitte herausgedrickt wird. Bei dem Ausführungsbeispiel von Fig. 2 wird dies dadurch verhindert, daß der zusätzliche Querfaden 3 an jeder seiner Abbindestellen von zwei Längsfäden 1 umschlungen wird. Dabei erstreckt sich die Flottung der Querfäden 3 jeweils über fünf Längsfäden 1.With some weave patterns it can happen that the additional transverse thread 3, which is deeply embedded in the fabric, is pressed out laterally from the middle of the stitch. In the embodiment of FIG. 2, this is prevented by the additional transverse thread 3 being looped around by two longitudinal threads 1 at each of its binding points. The float of the transverse threads 3 extends over five longitudinal threads 1 in each case.

Bei dem Ausführungsbeispiel von Fig. 3 hat das Grundgewebe, d.h., das Bindungsmuster der Längsfäden 1 und der oberen und unteren Querfäden 2, 5 eine siebenschäftige Struktur. Die zusätzlichen Querfäden 3 sind jedoch nur mit jedem vierzehnten Längsfaden 1 verwoben, d.h., sie sind nur in jedem zweiten Rapport des Grundgewebes abgebunden.In the embodiment of FIG. 3, the base fabric, ie the weave pattern of the longitudinal threads 1 and the upper and lower transverse threads 2, 5 has a seven-strand structure. The additional transverse threads 3 are, however, only interwoven with every fourteenth longitudinal thread 1, ie they are only tied in every second repeat of the base fabric.

Das Ausführungsbeispiel von Fig. 4 stimmt bezüglich des Grundgewebes mit dem von Fig. 3 überein. Die zusätzlichen Querfäden 3 haben jedoch Flottierungen von abwechselnd vier und sechs Längsfäden 1. Durch die uneinheitliche Länge der Flottierungen der zusätzlichen Querfäden 3 werden die Markierungseigenschaften verbessert. Die uneinheitliche Länge der Flottierungen ergibt sich dadurch, daß die zusätzlichen Querfäden 3 abwechselnd mit anders verlaufenden Längsfäden 1 abbinden, also z.B. abwechselnd mit dem ersten und dem zweiten Längsfaden eines Rapportes.The embodiment of FIG. 4 corresponds to that of FIG. 3 with regard to the base fabric. However, the additional transverse threads 3 have floats of alternating four and six longitudinal threads 1. The non-uniform length of the floats of the additional transverse threads 3 improves the marking properties. The non-uniform length of the floatations results from the fact that the additional transverse threads 3 alternately bind with different longitudinal threads 1, e.g. alternating with the first and the second longitudinal thread of a repeat.

Die nachfolgenden Beispiele 1 und 2 betreffen eine offen gewebte Bespannung für den Blattbildungsteil einer Papiermaschine, so daß die Längsfäden von der Kette und die Querfäden vom Schuß gebildet werden.Examples 1 and 2 below relate to an openly woven covering for the sheet-forming part of a paper machine, so that the longitudinal threads are formed by the warp and the transverse threads by the weft.

Beispiel 1:Example 1:

Das Grundgewebe ist doppellagig in achtschäftiger Bindung. Kettverlauf: Der Kettdraht 1 wird über zwei Schußpaare 2, 5 geführt, dann zwischen zwei Schußpaaren 2, 5, unter einem Schußpaar 2, 5 und schließlich zwischen drei Schußpaaren 2, 5, kommt wieder auf Papierseite und wiederholt den Rapport (s. Fig. 6). Die Flottungen der Kette 1 auf der Papierseite haben eine achtschäftige Atlasverteilung (siehe Fig. 5).The base fabric is double-layered in an eight-part weave. Warp run: The warp wire 1 is passed over two weft pairs 2, 5, then between two weft pairs 2, 5, under one weft pair 2, 5 and finally between three weft pairs 2, 5, comes again on the paper side and repeats the repeat (see Fig. 6). The floats of chain 1 on the paper side have an octagonal Atlas distribution (see Fig. 5).

Das Gewebe wurde mit einer Kettdichte von 38 Drähten/cm gewoben. Nach dem Fixieren verdichtet sich die Kettzahl durch den Querschrumpf des Gewebes auf 42 Drähte/cm. Die Kette ist aus monofilem Polyester, ⌀ 0,30 mm. Das Material ist längsstabil, d.h., hat hohen Elastizitätsmodul.The fabric was woven with a warp density of 38 wires / cm. After fixing, the warp count is compressed to 42 wires / cm by the cross shrinkage of the fabric. The chain is made of monofilament polyester, ⌀ 0.30 mm. The material is longitudinally stable, i.e. it has a high modulus of elasticity.

Die Schußdrähte der oberen Lage haben eine Dichte von 14 Drähten/cm beim Weben. Nach dem Fixieren hat das Gewebe 13,5 Schußdrähte /cm. Der Schußdurchmesser ist 0,30 mm. Das ist Material Polyester-Monofil Type Trevira 900, eine weiche Drahtqualität entsprechend einer Dehnung von 23,4 % bei 27 cN/tex.The weft wires of the top layer have a density of 14 wires / cm when weaving. After fixing it has that Fabric 13.5 weft wires / cm. The shot diameter is 0.30 mm. This is material polyester monofilament type Trevira 900, a soft wire quality corresponding to an elongation of 23.4% at 27 cN / tex.

Die Schußdrähte 5 der Laufseite werden so gewoben, daß sie präzise unter den Schußdrähten 2 der oberen Lage liegen. Wechselweise sind es Polyester-Monofile, ⌀ 0,32 mm, aus derselben Type wie der Schuß der oberen Lage und aus Polyamidmonofil, gleichfalls ⌀ 0,32 mm der Type Pa 6.6.The weft wires 5 of the barrel side are woven so that they lie precisely under the weft wires 2 of the upper layer. Alternatively, they are polyester monofilament, ⌀ 0.32 mm, of the same type as the weft of the upper layer and made of polyamide monofilament, also ⌀ 0.32 mm of type Pa 6.6.

Zur Unterteilung der Maschenöffnung sind in die obere Lage zusätzlich Schußdrähte 3 aus Polyester-Monofil, ⌀ 0,15 mm derselben weichen Drahttype Trevira 900 wie die übrigen Schußdrähte, eingewoben. Der Verlauf des zusätzlichen Schußdrahtes 3 entspricht der Figur 1, d.h. der Zusatzschuß verläuft jeweils über sechs Kettdrähte 1 und unter zwei Kettdrähte 1. An der Anbindestelle liegt der Zusatzschußdraht 3 in der Ebene der unteren Schußdrähte 5.To subdivide the mesh opening, weft wires 3 made of polyester monofilament, ⌀ 0.15 mm, of the same soft Trevira 900 wire type as the other weft wires are woven into the upper layer. The course of the additional weft wire 3 corresponds to Figure 1, i.e. the additional weft runs over six warp wires 1 and under two warp wires 1. At the attachment point, the additional weft wire 3 lies in the plane of the lower weft wires 5.

Das fixierte Gewebe hat 0,6 % Dehnung bei einer Belastung von 100 N/cm und eine Luftdurchlässigkeit von 8000 m³/m²/h. Auf der Papierseite liegen die Kettflottungen und die Flottungen des normalen Schußdrahtes 2 und des Zusatzschusses 3 in einer Ebene. Auf der Laufseite sind die Schußdrähte 5 15,5/100 mm tiefer als die Kettabkröpfung. Das bedeutet, daß das Gewebe ein Schußläufer ist. Erst, wenn 15,5/100 mm Dicke verbraucht werden, kommt der unterste Teil der Kettfäden zum ersten Mal in Berührung mit der Papiermaschine. D.h., die Abnützung der Kettfäden beginnt erst zu diesem Zeitpunkt. Wie die Figur 1 es zeigt, liegt die Abbindestelle des Zusatzschusses 3 so weit im Siebinneren versteckt, daß der Zusatzschuß, obwohl er tief unten abgebunden wurde, vom Abrieb nicht berührt wird.The fixed fabric has an elongation of 0.6% under a load of 100 N / cm and an air permeability of 8000 m³ / m² / h. On the paper side the warp floats and the floats of the normal weft wire 2 and the additional weft 3 lie in one plane. On the barrel side, the weft wires 5 are 15.5 / 100 mm deeper than the warp bend. This means that the fabric is a weft runner. Only when 15.5 / 100 mm thickness is used does the bottom part of the warp threads come into contact with the paper machine for the first time. This means that the warp threads start to wear at this point. As FIG. 1 shows, the tying point of the additional weft 3 is hidden so far inside the screen that the additional weft is not touched by the abrasion, even though it has been tied down low.

Dieses achtschäftige doppellagige Sieb wird für die Herstellung von Karton eingesetzt. Wegen des hohen Retentionsvermögens ist das Sieb gleichfalls bei der Herstellung von Verpackungspapier und ähnlicher schwergewichtiger Papiersorten für den Verpackungsbereich vorteilhaft.This octagonal double-layer sieve is used for the production of cardboard. Because of the high retention capacity, the sieve is also advantageous for the production of packaging paper and similar heavyweight types of paper for the packaging sector.

Beispiel 2:Example 2:

Das Gewebe ist 14schäftig und die Kette 1 verläuft über zwei Schußpaare 2, 5 zwischen einem Schußpaar 2, 5, unter einem Schußpaar 2, 5 und zwischen drei Schußpaaren 2, 5. Die Papierseite hat 7schäftige Atlasverteilung der Kettflottungen. Bei der Kette 1 werden 54 Drähte/cm beim Weben gezählt, nach dem Thermofixieren sind es 60 Drähte/cm. Die Kettdrähte bestehen aus Polyester-Monofil, ⌀ 0,17 mm, und sind aus einer längsstabilen Drahtqualität mit hohem Elastizitätsmodul. Die Schußdrähte 2 der oberen Lage sind aus Polyester-Monofil, ⌀ 0,17 mm, Type Trevira 901, und haben einen mittleren Elastizitätsmodul (Dehnung 19 % bei einer Belastung von 27 cN/tex). Verwoben werden 19 Schußdrähte/cm, im fertigen Sieb werden 17,5 cm normale Schußdrähte gezählt.The fabric has 14 shafts and the chain 1 runs over two weft pairs 2, 5 between one weft pair 2, 5, under one weft pair 2, 5 and between three weft pairs 2, 5. The paper side has 7-strand satin distribution of the warp floats. With warp 1, 54 wires / cm are counted during weaving, after heat-setting it is 60 wires / cm. The warp wires are made of polyester monofilament, ⌀ 0.17 mm, and are made of longitudinally stable wire quality with a high modulus of elasticity. The weft wires 2 of the upper layer are made of polyester monofilament, ⌀ 0.17 mm, type Trevira 901, and have a medium modulus of elasticity (elongation 19% at a load of 27 cN / tex). 19 weft wires / cm are woven, in the finished sieve 17.5 cm normal weft wires are counted.

Auf der Laufseite hat das Sieb beim Weben 19 Schußdrähte 5, ⌀ 0,20 mm, die Hälfte aus Polyester, weiche Qualität Type 900 (23,4 % Dehnung bei einer Belastung von 27 cN/tex), die andere Hälfte aus Polyamid Type 6.6.On the running side, the sieve has 19 weft wires 5, ⌀ 0.20 mm, half made of polyester, soft quality Type 900 (23.4% elongation at a load of 27 cN / tex), the other half made of polyamide Type 6.6 .

Zwischen jedem normalen Schußpaar wird ein Zusatzschuß mit 14schäftigen Drahtverlauf lt. Figur 3 eingewoben. Der Zusatzschuß ist gleichfalls aus Polyester, der weichen Type 900, und hat einen Durchmesser von 0,12 mm. Die Struktur des Grundgewebes ist eigentlich 7schäftig, die Zusatzschußdrähte werden nicht nach jedem 7schäftigen Rapport durch die Kette eingebunden, sondern erst nach jedem 14. Kettdraht.Between each normal pair of wefts, an additional weft with a 14-strand wire course according to FIG. 3 is woven. The additional shot is also made of polyester, the soft type 900, and has a diameter of 0.12 mm. The structure of the basic fabric is actually 7 shafts, the additional weft wires are not bound by the chain after every 7 shafts repeat, but only after every 14th warp wire.

Auf der Papierseite liegen die Kettdrähte, die Schußdrähte und die Zusatzschußdrähte alle in einer Ebene. Auf der Laufseite ist der Schuß in bezug auf Kette 9/100 mm tiefer, d.h. das Sieb ist ein Schußläufer.On the paper side, the warp wires, the weft wires and the additional weft wires are all in one plane. On the barrel side, the weft is 9/100 mm lower in relation to the chain, i.e. the sieve is a weft runner.

Das Sieb lt. Beispiel 2 hat eine feinstrukturierte Oberflächenstruktur, es wird vorwiegend für markierungsempfindliche Schreib- und Druckpapiere eingesetzt.The screen according to example 2 has a finely structured surface structure, it is mainly used for marking-sensitive writing and printing papers.

Claims (4)

  1. A clothing for the sheet forming section of a papermaking machine comprising a double-layer or multi-layer fabric of conventional longitudinal and transverse threads interwoven in a repeating weave pattern, and additional transverse threads floating on the paper side,
    characterized
    in that the additional transverse threads (3) have a greater repeat length than the ordinary transverse threads (2), and
    in that the additional transverse threads (3) alternately float in one weave repeat on the paper side, and in the next weave repeat they extend in the fabric interior.
  2. Clothing according to claim 1, characterized in that the additional transverse threads (3) are interwoven in pairs, and one each (3a) of the additional transverse threads of a pair floats on the paper side, while the other transverse thread (3b) of said pair extends in the fabric interior, and the course of the two additional transverse threads is exchanged after each weave repeat.
  3. Clothing according to claim 1 or 2, characterized in that the additional transverse threads (3) have a smaller diameter than the ordinary transverse threads (2) on the paper side (4).
  4. Clothing according to any one of claims 1 to 3, characterized in that the additional transverse threads (3) consist of a material having an elastic modulus equal to or lower than the ordinary transverse threads (2) on the paper side (4).
EP19870114565 1986-10-07 1987-10-06 Fabric for the wet end of a paper-making machine Expired - Lifetime EP0263482B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87114565T ATE62946T1 (en) 1986-10-07 1987-10-06 CLOTHING FOR THE SHEET FORMING PART OF A PAPER MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863634134 DE3634134A1 (en) 1986-10-07 1986-10-07 COVER FOR THE SHEET FORMING PART OF A PAPER MACHINE
DE3634134 1986-10-07

Publications (2)

Publication Number Publication Date
EP0263482A1 EP0263482A1 (en) 1988-04-13
EP0263482B1 true EP0263482B1 (en) 1991-04-24

Family

ID=6311231

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Application Number Title Priority Date Filing Date
EP19870114565 Expired - Lifetime EP0263482B1 (en) 1986-10-07 1987-10-06 Fabric for the wet end of a paper-making machine

Country Status (9)

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US (1) US4928737A (en)
EP (1) EP0263482B1 (en)
JP (1) JPH07122229B2 (en)
AT (1) ATE62946T1 (en)
BR (1) BR8704907A (en)
CA (1) CA1279234C (en)
DE (2) DE3634134A1 (en)
ES (1) ES2021667B3 (en)
FI (1) FI87667C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3817144A1 (en) * 1988-05-19 1989-11-30 Wangner Gmbh Co Kg Hermann DOUBLE-LAYER COVERING FOR THE SHEET FORMING AREA OF A PAPER MACHINE
DE3903198C2 (en) * 1989-02-03 1999-11-18 Kufferath Andreas Gmbh Multi-layer screen fabric of a paper machine
US5052448A (en) * 1989-02-10 1991-10-01 Huyck Corporation Self stitching multilayer papermaking fabric
JPH0748719Y2 (en) * 1989-03-31 1995-11-08 日本フエルト株式会社 Press felt with less pressure spots
US5158117A (en) * 1991-07-30 1992-10-27 Tamfelt Oy Ab Two-layer paper machine cloth
US5214809A (en) * 1992-06-29 1993-06-01 Paul Stuart Articulated mattress for adjustable bed
JP3444373B2 (en) * 1994-03-18 2003-09-08 日本フイルコン株式会社 Warp double weft double papermaking fabric with auxiliary wefts arranged on the papermaking side fabric
US7300554B2 (en) * 2003-09-11 2007-11-27 Albany International Corp. Textured surface of a tissue forming fabric to generate bulk, cross directional tensile, absorbency, and softness in a sheet of paper
US20060219313A1 (en) * 2005-03-31 2006-10-05 Hippolit Gstrein Papermaker's press felt with long machine direction floats in base fabric
US20090183795A1 (en) * 2008-01-23 2009-07-23 Kevin John Ward Multi-Layer Papermaker's Forming Fabric With Long Machine Side MD Floats
EP2230352B1 (en) * 2009-03-20 2012-10-03 Heimbach GmbH & Co.KG Woven fabric band for circulation in a machine
EP2584091B1 (en) * 2011-10-22 2014-04-02 Heimbach GmbH & Co. KG Woven papermaker fabric, in particular a forming fabric
JP2017089022A (en) * 2015-11-04 2017-05-25 日本フイルコン株式会社 Industrial two-layer woven fabric

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572905A (en) * 1976-08-10 1980-08-06 Scapa Porritt Ltd Papermakers fabrics
US4314589A (en) * 1978-10-23 1982-02-09 Jwi Ltd. Duplex forming fabric
DE3036409C2 (en) * 1980-09-26 1983-01-20 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Double-layer screen for the screen part of a paper machine
US4423755A (en) * 1982-01-22 1984-01-03 Huyck Corporation Papermakers' fabric
JPS5942117A (en) * 1982-08-31 1984-03-08 Hitachi Cable Ltd Manufacture of composite electrode wire for electric discharge machining
US4564051A (en) * 1983-07-16 1986-01-14 Andreas Kufferath Gmbh & Co. Kg Multiple ply dewatering screen particularly for a web forming part of a paper making machine
DE3329739C1 (en) * 1983-08-17 1985-01-10 Hermann Wangner Gmbh & Co Kg, 7410 Reutlingen Multi-layer covering for paper machines
JPS61289195A (en) * 1985-06-17 1986-12-19 日本フイルコン株式会社 Papermaking double fabric
JPS62206095A (en) * 1986-03-05 1987-09-10 日本フィルコン株式会社 Papermaking fabric

Also Published As

Publication number Publication date
ATE62946T1 (en) 1991-05-15
FI87667B (en) 1992-10-30
BR8704907A (en) 1988-05-24
CA1279234C (en) 1991-01-22
FI874341A0 (en) 1987-10-02
DE3634134A1 (en) 1988-04-21
ES2021667B3 (en) 1991-11-16
JPH07122229B2 (en) 1995-12-25
JPS6399393A (en) 1988-04-30
US4928737A (en) 1990-05-29
EP0263482A1 (en) 1988-04-13
DE3769573D1 (en) 1991-05-29
FI87667C (en) 1993-12-08
FI874341A (en) 1988-04-08

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