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WO2010049304A1 - Toile de formation - Google Patents

Toile de formation Download PDF

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Publication number
WO2010049304A1
WO2010049304A1 PCT/EP2009/063653 EP2009063653W WO2010049304A1 WO 2010049304 A1 WO2010049304 A1 WO 2010049304A1 EP 2009063653 W EP2009063653 W EP 2009063653W WO 2010049304 A1 WO2010049304 A1 WO 2010049304A1
Authority
WO
WIPO (PCT)
Prior art keywords
threads
binding
thread
fabric layer
longitudinal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2009/063653
Other languages
German (de)
English (en)
Inventor
Johann Boeck
Matthias Hoehsl
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Priority to CN2009801429581A priority Critical patent/CN102197176A/zh
Priority to BRPI0914025A priority patent/BRPI0914025A2/pt
Priority to CA2741604A priority patent/CA2741604A1/fr
Priority to JP2011533671A priority patent/JP2012506959A/ja
Publication of WO2010049304A1 publication Critical patent/WO2010049304A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details 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
    • D21F1/0045—Triple layer fabrics
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D11/00—Double or multi-ply fabrics not otherwise provided for

Definitions

  • the invention relates to a papermaking wire, in particular a forming fabric, according to the preamble of patent claim 1.
  • Forming fabrics are used in the forming section of a paper machine.
  • a fiber suspension is applied from the headbox of the paper machine to a forming fabric or to two forming fabrics (Gap formers).
  • An object of the forming fabric here is to dewater the fiber suspension and form a fibrous web, as little as possible pulp fibers and fillers from the fiber suspension should be washed during the dewatering process.
  • the quality of the fibrous web formed is strongly influenced by the structure of the fibrous web-facing surface (paper side) of the forming fabric.
  • the life of the forming fabric is greatly affected by the structure of the paper machine facing surface (machine side) of the forming fabric.
  • binding threads are preferably an integral part of the paper-side weave structure (integral binding threads), whereby
  • the binding threads weave alternately with warp yarns of the upper and lower fabric layers, each binder yarn usually being interwoven with a plurality of upper warp yarns prior to the latter on the outside of the lower fabric layer crosses single lower warp thread to form a tether and then re-interweave with several upper warp threads.
  • the binding threads often cover a large distance between the upper and lower layers of fabric, as a result of which the screens known from the prior art are often very thick and therefore carry a great deal of water.
  • the screens known from the prior art often provide a drainage behavior which varies greatly over the screen surface, which can lead to hydaulic marking of the paper formed on such screens.
  • binding threads between the fabric layers are often exposed to high wear in the known sieves, as they are often not sufficiently fixed between the fabric layers.
  • the paper machine wire according to the invention in particular forming fabric, has an upper and a lower fabric layer and binding threads for joining the two fabric layers.
  • the outside of the top fabric layer provides the web-contacting side of the fabric as the outside of the bottom fabric layer provides the machine-contacting side of the fabric.
  • the lower fabric layer is formed by the binding yarns, lower transverse yarns, and the binding yarns and the lower transverse yarns interwoven with these extending lower longitudinal yarns.
  • the lower fabric layer has a weave pattern, which is repeated in lower repeats.
  • the binding threads are arranged in pairs. Furthermore, the binding threads of each pair are interwoven with each other in an intermeshing manner with upper and lower longitudinal threads. Furthermore, each pair of binder threads is flanked on each side by a lower transverse thread, wherein each of the two flanking lower transverse threads is interwoven in a periodic sequence with lower longitudinal threads as follows:
  • flanking lower transverse thread continuously crosses a plurality of directly following lower longitudinal threads on the outside of the lower fabric layer
  • flanking lower transverse thread continuously crosses a lower transverse thread between the upper and lower layers of fabric and forms a thread crease.
  • each binding yarn of each pair of lower longitudinal yarns forms at least one lower segment and each segment is formed by continuously passing two or more of the respective bonding yarn of the pair on the outside of the lower fabric layer - A -
  • one of the two flanking lower transverse threads each forms a bend with the lower longitudinal thread, which immediately precedes the corresponding lower segment
  • binding threads in interweaving with the lower longitudinal threads form segments which extend over two or more consecutive lower longitudinal threads, the binding threads extend to a greater extent on the outside of the lower fabric layer and not between the fabric layers, whereby the thickness of the screen and the Significantly reduce associated disadvantages.
  • each binding thread weaves over at least two successive lower longitudinal threads is further achieved that each binding thread when weaving with the lower longitudinal threads "flat" on the outside of the lower fabric layer passes and through these flanking on both sides lower transverse threads, the In addition, within the lower repeat, one of the two flanking lower transverse threads each forms a bend with the lower longitudinal thread which immediately precedes the corresponding binding segment and the other of the two Flanking lower transverse threads each forming a bend with the lower longitudinal thread, which follows the corresponding binding segment immediately, each binding segment of the lower repeat is held firmly in position, whereby a relative movement of the binding threads between lower and upper fabric layer is prevented and as a result, the inner wear of Siebs is significantly reduced.
  • drainage channels are formed in areas extending between two side by side extending and floating on the outside lower transverse threads.
  • the two flanking lower transverse threads on the outside of the lower fabric layer continuously cross at least the same lower longitudinal threads, which form the binding segments together with the binding threads of the pair, the cross sections of the drainage channels formed by the flotations are reduced, whereby the otherwise uniform dewatering rate and thereby the resulting Marking tendency is reduced.
  • FIG. 1 shows a first embodiment of a sieve according to the invention in the transverse thread direction.
  • FIG. 2 shows a second embodiment of a sieve according to the invention in the transverse thread direction.
  • FIG. 3 the lower fabric layer of the screen of Figure 2;
  • Fig. 4 is a representation corresponding to Figure 1 of an alternative embodiment.
  • FIG. 5 shows a view of the lower fabric layer of the forming fabric produced according to FIG. 4, viewed from below;
  • Fig. 6 is a representation corresponding to Figure 5, in which drainage areas of the lower fabric layer are marked.
  • FIG. 7 shows a plan view of the upper fabric layer of a forming fabric produced according to FIG. 4, viewed from above;
  • FIG. 8 shows a plan view of the lower fabric layer of the forming fabric produced according to FIG. 4, viewed from above;
  • FIG. 9 is a simplified representation corresponding to FIG. 8 of the lower fabric layer of the forming fabric produced according to FIG. 4.
  • FIG. 1 shows a first embodiment of a paper machine wire 100 according to the invention in the form of a forming fabric in the transverse thread direction.
  • a repeat unit of the weave structure of the wire 100 is shown.
  • the forming fabric 100 has upper longitudinal threads 1, 3,5, 7, 11, 11, 13, 15, 17 and 19 designed as warp threads and lower longitudinal threads 2, 6, 6, 8, 10, 12, 14, 16, which are formed as warp threads, 18 and 20.
  • the longitudinal threads extend perpendicularly from the drawing plane of FIG. 1.
  • the forming fabric 100 has binding yarns i1 to i20, which are arranged in pairs of binding yarns i1 and i2, i3 and i4 to i19 and i20. Further, the forming fabric 100 has upper transverse threads T1 to T20 formed as weft threads and lower transverse threads B1 to B20 formed as weft threads. In the forming fabric 100 shown in Figure 1, the ratio of the number of pairs of binder yarns i1 and i2 to i19 to i20 and upper transverse yarns T1 to T20 together with the number of lower transverse yarns B1 to B2 is 3: 2.
  • the forming fabric 100 according to the invention has an upper fabric layer 101 and a lower fabric layer 102, wherein the two fabric layers 101 and 102 are connected to one another by the binding threads i1 and i2 to i19 and i20.
  • the upper fabric layer is defined by the binding threads i1 to i20, by the upper transverse threads T1 to T20 and by the upper longitudinal threads 1, 3,5,7 extending transversely to the binding threads i1 to i20 and the upper transverse threads T1 to T20 and interwoven therewith , 9,11, 13,15,17 and 19 formed. It would also be conceivable to form the upper fabric layer only by upper longitudinal threads and with these interwoven binding threads.
  • the lower fabric layer 102 is formed by the binding threads i1 to i20, the lower transverse threads B1 to B2 and by the interwoven and extending transversely to these lower longitudinal threads 2,4,6,8,10,12,14,16,18 and 20 formed.
  • the binding threads of a pair are mutually exchangeable with upper longitudinal threads 1, 3,5,7,9,11, 13,15,17 and 19 and with lower longitudinal threads 2,4,6,8,10,12,14,16, As a result, when the first binding thread of the pair is woven with upper longitudinal threads, the second binding thread of the pair is interwoven with lower longitudinal threads and if the second binding thread of the pair is woven with upper longitudinal threads, the first binding thread of the pair is interwoven with lower longitudinal threads.
  • the weave pattern of the upper fabric layer 101 forms a plain weave, whereby the weaving threads i1 to i20 mutually exchange interweaving the binder thread pairs with the upper longitudinal threads 1, 3,5,7,9,11, 13,15,17 and 19 by the weaving of the upper longitudinal threads 1, 3,5,7,9,11, 13,15,17 and 19 continues with the upper transverse threads T1 to T20 weave pattern is continued. Accordingly, during weaving, each binding thread i1 to i20 alternately crosses on the outer side 103 of the upper fabric layer 101 and between the two fabric layers 101, 102 during interweaving with successive upper longitudinal threads 1, 3, 5, 7, 9, 11, 13, 15, 17 and 19 extending upper longitudinal threads 1, 3,5,7,9,11, 13,15,17 and 19.
  • the lower fabric layer has a weave pattern, which is repeated in lower repeats, the lower repeat through the lower longitudinal threads 2,4,6,8,10,12,14,16,18 and 20th , the binding yarns i1 to i20 and the lower transverse yarns B1 to B20 are formed.
  • Each pair of binding threads i1 and i2 to i19 to i20 is flanked on each side by one of the lower transverse threads B1 to B20, wherein each of the two flanking lower transverse threads B1 to B20 is arranged in a periodic sequence with lower longitudinal threads 2,4,6,8,10,12, 14,16,18 and 20 is interwoven as follows:
  • flanking lower transverse thread continuously crosses on the outside 104 of the lower fabric layer 102 four directly successive lower longitudinal threads
  • flanking lower transverse thread continuously crosses between the upper 101 and lower fabric layers 102 a lower longitudinal thread and forms a
  • the binding thread pair i1 and i2 is flanked on one side by the lower transverse thread B2 and on the other side by the lower transverse thread B3.
  • each binding thread of a pair with lower longitudinal threads forms at least one binding segment S1 to S20 and each binding segment S1 to S20 is formed in which the respective binding thread of the pair on the outer side 104 of the lower fabric layer 103 runs continuously at least two directly successive lower longitudinal threads crossed.
  • the binding thread i1 of the binding thread pair i1 and i2 forms the binding segment S1 and the binding thread i2 of the binding thread pair i1 and i2 forms the binding segment S2.
  • the binding segment S1 is formed in that the binding yarn i1 of the pair on the outside 104 of the lower fabric layer 102 continuously crosses the two immediately consecutive lower longitudinal threads 14 and 16.
  • the binding segment S2 is formed in that the binding yarn i2 of the pair on the outer side 104 of the lower fabric layer 102 continuously crosses the two immediately consecutive lower longitudinal yarns 4 and 6.
  • the segments are such that between two successive binding segments formed by the same binding thread, for example, i1, this binding thread, for example, i1, on the outer side 103 of the upper fabric layer 101 at least one upper longitudinal thread, eg. 1 and 5, crosses.
  • the binding segments of each pair of binder yarns are positioned relative to the lower transverse yarns flanking them such that the two flanking lower transverse yarns on the outside of the lower fabric layer continuously intersect at least the same lower longitudinal yarns which together with the binding yarns of the pair form the binding segments.
  • the lower transverse thread B2 and the lower transverse thread B3 on the outer side 104 of the lower fabric layer 102 continuously cross the lower longitudinal threads 4 and 6 as well as 14 and 16, which also form the binding segments S1 and S2.
  • one of the two flanking lower transverse threads each forms a bend with the lower longitudinal thread, which immediately precedes the corresponding binding segment.
  • the lower transverse thread B2 forms a bend with the lower longitudinal thread 2 and with the lower longitudinal thread 12, wherein the lower longitudinal thread 2 immediately precedes the binding segment S2 and the lower longitudinal thread 12 the binding segment S1.
  • the invention provides that the other of the two flanking lower transverse threads each forms a bend with the lower longitudinal thread, which immediately follows the corresponding binding segment.
  • the lower transverse thread B3 forms a bend with the lower longitudinal thread 8 and with the lower longitudinal thread 18, the lower longitudinal thread 8 immediately following the binding segment S2 and the lower longitudinal thread 18 following the binding segment S1.
  • the binding segments of the two binding threads are arranged alternately in each binding thread pair.
  • the binding segments S1 and S2 alternate.
  • three lower longitudinal threads are always arranged between immediately adjacent binding segments of a pair of binder threads.
  • between the immediately successive binding segments S1 and S2 are the three lower longitudinal threads 8, 10 and 12 or the three lower longitudinal threads
  • each binder thread pair has a binding yarn of the first kind i2, i4, i6, i8, i10, i12, i14, i16, i18 and i20 and a binder yarn of the second kind i1, i3, i5, i7, i9, i11, i13, i15, i17 and i19, wherein in the upper repeat unit, the binding yarn of the first kind i2, i4, i6, i8, MO, i12, i14, i16, i18 and i20 crosses two upper longitudinal yarns when it runs on the outer surface 103 of the upper fabric layer 101 and the binder yarn second type i1, i3, i5, ⁇ i, i9, i11, i13, i15, i17 and i19 crosses three upper longitudinal threads when it runs on the outer side 103 of the upper fabric layer 101.
  • binding segments formed by binding threads of the same type are immediately adjacent binding thread pairs in FIG.
  • Cross thread direction arranged offset to one another about a lower longitudinal thread and therefore partially overlapping.
  • the binding threads of the first type i2, i4, i6, i8, i10, i12, i14, i16, i18 and i20 form the corresponding lower ones
  • S2 and S4 in the transverse thread direction are arranged to overlap the lower longitudinal thread 6 next to each other.
  • FIG. 2 shows a second embodiment of a paper machine wire 110 according to the invention designed as a forming fabric.
  • the screen 110 shown in FIG. 2 differs substantially from the screen 100 shown in FIG. 1 in that the ratio of the number of pairs of binder yarns i1 and i2 to i19 and i20 and upper transverse yarns T1 to T10 adds up to the number lower transverse threads B1 to B10 is 2: 1.
  • binding segments formed by binding threads of the same type immediately adjacent adjacent pairs of binding thread in the transverse thread direction directly adjoin one another.
  • the binding threads of the first type i2, i3, i6, i7, i10, i11, i14, i15, i18 and i19 with the corresponding lower transverse threads form the binding segments S2, S3, S6, S7, S10, S11, S14, S15. S18 and S19, where, for example, the next to each other arranged binding segments S2 and S3 in the transverse thread direction directly - ie are arranged next to each other without overlap or spacing of one or more lower longitudinal threads.
  • the lower transverse threads have a larger cross-sectional area than the binding threads.
  • FIG. 3 shows a representation of the lower fabric layer 112 over a part of the lower repeat with a view of the outer side 114 of the lower fabric layer 112.
  • Each binding yarn i1 to i20 of each pair with lower longitudinal threads 2,4,6,8,10,12,14,16,18 and 20 forms at least one binding segment S1 to S20 and each binding segment S1 to S20 is formed by the respective Binding yarns i1 to i20 of the pair on the outer side 114 of the lower fabric layer 113 continuously two or more immediately consecutive lower longitudinal threads 2,4,6,8,10,12,14,16,18 and 20 crosses and
  • binding segments S1 to S20 of each pair of binding threads are arranged relative to the flanking transverse threads B1 to B10 flanking them
  • one of the two flanking lower transverse threads each forms a bend with the lower longitudinal thread which immediately precedes the corresponding binding segment and iii) the other of the two flanking lower transverse threads each forms a bend with the lower longitudinal thread which immediately follows the corresponding binding segment.
  • the binding thread pair i3 and i4 are picked out.
  • the binding thread i3 forms the binding segment S3 with the lower longitudinal threads 14 and 16
  • the binding thread i4 forms the binding segment S4 with the lower longitudinal threads 4 and 6.
  • the binding segment S4 is formed in that the binding thread i4 on the outside 1 14 of the lower fabric layer 113 continuously crosses the two immediately consecutive lower longitudinal threads 4 and 6.
  • the binding segment S3 is formed in that the binding yarn i3 on the outside 114 of the lower fabric layer 113 continuously crosses the two immediately consecutive lower longitudinal threads 14 and 16.
  • binding segments S3 and S4 are arranged relative to the flanking transverse threads B2 and B3 flanking them
  • flanking lower transverse thread B2 forms a bend with the lower longitudinal threads 2 and 12, wherein the longitudinal thread 2 immediately precedes the binding segment S4 and the longitudinal thread 12 the binding segment S3 and the flanking lower transverse thread B3 a bend with the lower longitudinal threads 8 and 18 forms, wherein the longitudinal thread 8 the binding segment S4 and the longitudinal thread 18 immediately following the binding segment S3.
  • FIGS. 4 to 6 a further embodiment variant of a forming fabric 100 constructed according to the invention is explained below.
  • the principles described above are implemented with regard to the position or incorporation of the lower transverse threads flanking a respective pair of binder yarns and also with respect to the course of the binding yarns i1 to i20 of the first type and the second type.
  • the binding thread pair i1, i2 it can be seen that the binding thread i1 binds to form the plain weave over the three upper longitudinal threads 1, 5 and 9 where it is bound into the upper, ie paper-side fabric layer 101, thus crossing it before it changes back to the lower fabric layer 102 and there on the outside, the lower longitudinal threads 14, 16 crosses to form the binding segment S1.
  • the binding thread i1 is therefore a binding thread of the second kind.
  • the binding thread i2 is a binding thread of the first type which, where it is integrated into the upper fabric layer 101 to form the plain weave, crosses two upper longitudinal threads 13, 17, ie at the Outside of the same binds.
  • the arrangement already shown in Fig. 1 is also realized. It can be seen, for example, that the binding segments S3, S4 of the pair of binding yarns i3, i4 with respect to those of the pair of yarns i1, i2 are shifted by one longitudinal thread in the transverse direction, ie the weft direction.
  • the arrangement described with reference to FIG. 2 could also be selected, in which an overlap of such binding segments of adjacent pairs of binding thread is not present.
  • FIG. 1 A substantial difference compared to the embodiment shown in Fig. 1 lies in how the binding threads of various kinds adjacent pairs of binder threads follow each other.
  • Fig. 1 it can be seen that in successive pairs of binder yarns always first denoted by odd number binder thread, so the binding yarn i1, i3, i5, etc., a binding yarn of the second kind, ie a binding yarn, where it in the upper fabric layer 101 is bound to form the plain weave, binds over three upper longitudinal threads or crosses them.
  • the second following binding yarn of a respective pair of binder yarns is a binder yarn of the first type which intersects two upper longitudinal yarns where it is bound in the upper fabric layer 101 to form the plain weave.
  • Fig. 1 digits 3, 2, wherein the numeral 3 each denotes a binding thread of the second type, while the numeral 2 denotes a binding thread of the first kind.
  • the binding threads of the same kind of the different pairs of binder threads are adjacent to one another in the direction of the longitudinal threads of successive pairs of binder threads.
  • the binder yarn pair i3, i4 also serves as binder yarn the first type trained binding thread i3.
  • binding thread i4 of the binding thread pair i3, i4 which is a binding thread of the second type and thus sets or crosses over three upper longitudinal threads 3, 7, 11, the binding thread i5 of the binding thread pair i5, i6 lies.
  • This binding thread i5 is also a binding thread of the second type, thus crossing two upper longitudinal threads 1, 17 for forming the plain weave in the upper fabric layer 101.
  • Binding threads or transverse threads are formed as weft threads, characterized in that always in relation to the succession to be introduced in the temporal sequence Bindefäden always first a binder yarn of a kind of a pair, then the binder yarn of another kind of one pair, then the binding yarn of another kind of the next pair and then the binding yarn of a kind of the next pair, etc. is introduced, of course, between each pair then the upper and lower transverse threads are introduced, so for example, between the binding thread pairs i1, i2 and i3, i4 the upper transverse threads T3, T4 and flanking in the lower fabric layer 102 lower transverse threads B3, B4 are introduced.
  • This sequence of smaller distance and greater distance in the different adjacent pairs of binder yarns is continued both in the transverse direction, so for example, the weft direction, as well as the longitudinal direction, so for example, the warp direction.
  • These four different dewatering areas which continue correspondingly over the successive repeats, have slightly different and high regularity layers to each other and in the fabric structure, thus enabling low-marking retention of fillers and fibers from the fiber suspension used for papermaking, and promoting homogeneous and undirected drainage.
  • the drainage areas E1, E2, E3, E4 arranged alternately in the binding diagonal which are determined by the placement of the outside Tie segments are formed and appear alternately open and dense and thus cause a homogeneous non-directional drainage. If the drainage channels E1, E2, E3, E4 are arranged regularly, this can lead to a marking corresponding to this regularity by a washing out of fibers and an increased washing out of fillers.
  • FIG. 5 further shows that the diagonals L1, L2 formed between the respective binding segments of the binding threads of the same type of adjacent pairs of binder yarns, differing from a basically rectilinear main diagonal D of the fabric structure of the lower fabric layer 102, alternately have different angular positions relative to the transverse or transverse diagonal .
  • the longitudinal direction of the forming 100 has. These diagonals each extend between the cross-directionally viewed middle regions of the binding segments binding threads of the same type of adjacent pairs of binder threads.
  • a dotted line L1 defines a diagonal which is e.g. connecting the center regions, viewed in the transverse direction, of binding segments S5, S8 of the binding threads i5, i8 of the first kind.
  • a dashed line L2 starting from the binding thread i8, continues this diagonal to the next binding thread or the connecting thread i9 of this pair, which, like the binding threads i5, i8, is a binding thread of the second kind. It can be seen that here there is no straight line extending through the lower fabric layer 102 diagonal. Rather, it results in a zigzagging line. Due to this more irregular course compared to a straight running diagonal the marking tendency is reduced.
  • a ratio of the open area of the running side fabric layer to the open area of the paper side fabric layer of less than 1, preferably less than 0.95, most preferably less than 0.9, is particularly advantageous .
  • the paper side, ie upper fabric layer 101 is formed with an open structure, ie higher porosity, than the running side, lower fabric layer 102, this also helps to reduce the leaching of fillers from the paper side.
  • FIG. 7 shows a view of the upper fabric layer 101, viewed from above, that is to say from the side in contact with the paper material to be produced.
  • the various transverse threads T1, 12, T3, etc., or longitudinal threads 1, 3, 5, etc. can be seen. It can also be seen that the binding thread pair i1, ⁇ 2, which in this view in the upper fabric layer 101, actually acts as a single transverse thread contributing to the plain weave is looked at.
  • Transverse threads of the upper fabric layer 100 are formed in the illustrated case substantially square, not covered in the plan view by threads surface areas F, which are shown dotted in Fig. 7.
  • the open area of the upper fabric layer 101 is defined by the ratio of the area, not covered by threads, formed by all these surface areas F to the entire surface considered, which covers the sum of all surface areas F and all in plan view by the longitudinal and transverse threads Represents surfaces.
  • FIG. 8 shows a representation corresponding to FIG. 7 in the viewing direction lower fabric layer 102. This is therefore also viewed in the view of FIG. 8 from the top, ie from one of the upper fabric layer side facing.
  • FIG. 8 also shows the various longitudinal and transverse threads as well as the binding threads i1 to i10 of the various pairs of binder threads which likewise run in the transverse direction.
  • FIG. 9 shows a schematic representation in which the various longitudinal threads 2 to 10 are shown extending in a dark vertical direction.
  • the lines labeled B1 to B5 represent the various longitudinally successive and transverse transverse threads. Lightly marked are Abbinde Schemee A. These are those areas in which a transverse thread over a longitudinal thread sets before he returns to the bottom of the four then floats along following longitudinal threads.
  • the advantage is achieved that the wrap angles with respect to the longitudinal threads are reduced by the floats formed in the binding threads, in particular also in the region of the binding segments, which generally results in less wear due to reduced friction between the longitudinal and transverse threads is due. Also, by incorporating more than one longitudinal thread of the lower fabric layer by means of the binding threads, a stronger bond between the two fabric layers is achieved, which generally leads to a smaller thickness of the forming fabric and a faster or better drainage at a lower open volume. It can thus be achieved with such a constructed forming fabric higher production speeds in papermaking.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Woven Fabrics (AREA)

Abstract

L'invention concerne une toile de machine à papier, en particulier une toile de formation, avec des couches de tissu inférieure et supérieure et avec des fils de liage destinés à relier les deux couches de tissu. L'invention est caractérisée en ce que, dans la partie inférieure, chaque fil de liage de chaque paire forme au moins un segment de liage avec les fils longitudinaux inférieurs et chaque segment de liage est ainsi formé, en ce que les différents fils de liage de la paire, sur le côté extérieur de la couche de tissu inférieure, croisent deux fils longitudinaux ou plus se succédant immédiatement, en ce que les segments de liage de chaque paire de fils de liage sont disposés par rapport aux fils transversaux inférieurs qui les bordent de manière que i) les deux fils transversaux inférieurs qui les bordent, sur la face extérieure de la couche de tissu inférieure, croisent au moins les mêmes fils longitudinaux inférieurs qui forment les segments de liage avec les fils de liage de la paire et ii) un des deux fils transversaux inférieurs qui les bordent forme avec le fil longitudinal inférieur un coude qui précède directement le segment de liage et iii) l'autre des deux fils transversaux inférieurs qui les bordent forme avec le fil longitudinal inférieur un coude qui suit directement le segment de liage.
PCT/EP2009/063653 2008-10-28 2009-10-19 Toile de formation Ceased WO2010049304A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN2009801429581A CN102197176A (zh) 2008-10-28 2009-10-19 成型网
BRPI0914025A BRPI0914025A2 (pt) 2008-10-28 2009-10-19 tela formadora
CA2741604A CA2741604A1 (fr) 2008-10-28 2009-10-19 Toile de formation
JP2011533671A JP2012506959A (ja) 2008-10-28 2009-10-19 フォーミングファブリック

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008043222.9 2008-10-28
DE102008043222A DE102008043222A1 (de) 2008-10-28 2008-10-28 Formiersieb

Publications (1)

Publication Number Publication Date
WO2010049304A1 true WO2010049304A1 (fr) 2010-05-06

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PCT/EP2009/063653 Ceased WO2010049304A1 (fr) 2008-10-28 2009-10-19 Toile de formation

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JP (1) JP2012506959A (fr)
KR (1) KR20110079850A (fr)
CN (1) CN102197176A (fr)
BR (1) BRPI0914025A2 (fr)
CA (1) CA2741604A1 (fr)
DE (1) DE102008043222A1 (fr)
WO (1) WO2010049304A1 (fr)

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
DE102011003304A1 (de) * 2011-01-28 2012-08-02 Voith Patent Gmbh Zellstoffentwässerungsbespannung für eine Zellstoffentwässerungsmaschine
DE102012207044A1 (de) * 2012-04-27 2013-10-31 Voith Patent Gmbh Formiersieb
DE102013106327B4 (de) 2013-06-18 2015-01-08 Andritz Technology And Asset Management Gmbh Papiermaschinensieb
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EP1985749A2 (fr) * 2007-04-28 2008-10-29 Voith Patent GmbH Toile de formage

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EP1536060A1 (fr) * 2003-11-17 2005-06-01 Voith Fabrics Patent GmbH Toile de formation
DE202006011572U1 (de) * 2006-07-28 2006-09-28 Voith Patent Gmbh Formiersieb
EP1985749A2 (fr) * 2007-04-28 2008-10-29 Voith Patent GmbH Toile de formage

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BRPI0914025A2 (pt) 2015-11-03
CA2741604A1 (fr) 2010-05-06
DE102008043222A1 (de) 2010-04-29
KR20110079850A (ko) 2011-07-08
CN102197176A (zh) 2011-09-21

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