EP1991735A1

EP1991735A1 - Fabric belt for machine for producing web material, especially paper or card

Info

Publication number: EP1991735A1
Application number: EP07703981A
Authority: EP
Inventors: Petra Hack-Ueberall; Johann Boeck
Original assignee: Voith Patent GmbH
Current assignee: Voith Patent GmbH
Priority date: 2006-02-25
Filing date: 2007-01-18
Publication date: 2008-11-19
Anticipated expiration: 2027-01-18
Also published as: US7775243B2; JP2009527656A; US20090035537A1; WO2007096218A1; EP1991735B1

Abstract

A belt for a machine for producing web material, especially paper or card, comprises a web-side first woven fabric ply (100) and a machine-side second woven fabric ply (102), the first woven fabric ply and the second woven fabric ply being bound together by binding threads (108, 110) and the second woven fabric ply having an irregular sateen construction.

Description

Fabric tape for a machine for producing web material, in particular paper or cardboard

The present invention relates to a fabric tape for a machine for producing web material, in particular paper or cardboard.

US 2004/0149342 discloses such a fabric band, generally referred to as a forming fabric, which is produced with two fabric layers. A first fabric layer on the web material side carries the material to be produced and is woven with a plain weave in order to minimize the risk of marking the web material to be produced by the smoothest possible surface of the web material-side first fabric part. A running side or machine side second fabric layer gives the fabric tape the required stability and is guided in operation on the various leading or driving the fabric tape rollers or roller elements. The two fabric layers are connected by a variety of binding threads.

It is the object of the present invention to provide a fabric tape for a machine for making web material! to provide, in which on the one hand, the marking tendency is further reduced, on the other hand, but also ensured a high stability of the fabric tape.

According to the invention, this object is achieved by a fabric tape for a machine for producing web material, in particular paper or cardboard, comprising a web material side first fabric layer and a machine side second fabric layer, wherein the first fabric layer and the second fabric layer are connected by binding threads and the second fabric layer with woven in an irregular satin weave. The use of an irregular satin weave for the second fabric layer brings various advantages. While a regular satin weave leads to very pronounced, dominant binding diagonals, ie diagonals defined by the binding points of the warp and weft threads, which entail the danger that they will be visible through the first material layer on the length of the web material, this is the result of an irregular satin weave ensured that such dominant bond diagonals can not arise. Nevertheless, of course, the irregular atlas binding also takes into account the basic rules for the formation of an atlas binding, such as that no binding point directly adjoins another binding point. Another advantage of using an atlas binding is that it has a very large ratio of floats to binding points. That is, the individual threads involved in the fabric run largely without binding points, which on the one hand helps to reduce the tendency to mark, but on the other hand ensures that, for example, on the running side primarily threads are present, which are optimally designed for the requirements there ,

In a particularly advantageous embodiment, it can be provided that the irregular satin weave is an irregular 8-bind satin weave. The use of such an irregular 8-binding satin weave has the consequence that on the one hand while still comparatively long floats are present, but on the other hand, these floats are not so long that the forces occurring in the manufacturing operation there is a risk that individual threads are moved could.

Furthermore, the fabric tape according to the invention can be configured such that the first fabric layer and the second fabric layer are constructed with longitudinal threads extending in a tape longitudinal direction and transverse threads extending in a tape transverse direction, and the floats of the transverse threads of the second fabric layer at the first fabric layer weggewandteπ side of the longitudinal threads of the second fabric layer. This structure leads to the fact that primarily the transverse threads form the running side or machine-side surface and, accordingly, thread material can also be selected for this, which is very wear-resistant. The longitudinal threads of the second fabric layer may then be selected substantially unaffected by any wear requirements to impart a particular tensile strength to the fabric tape.

For reasons of production technology, it can advantageously be provided that the longitudinal threads are warp threads and that the transverse threads are weft threads.

A configuration which is advantageous with regard to the avoidance of a marking in the web material to be produced may provide that in a weave repeat of the second fabric layer, the bond points formed between longitudinal threads and transverse threads are distributed such that at least two groups with three binding points exist which have a pitch number 2 or one Progression number 2 corresponding distance. Thus, it is achieved that in comparatively small regions a relatively large number of binding points is present, so that approximately conditions are produced, such as are present in a 5-bin atlas. Very close bond points are also advantageous for reducing marking tendency. In other areas, there are then fewer bonding points, so that a substantially smooth surface is provided there.

In an alternative embodiment it can be provided that in a weave repeat of the second fabric layer, the bond points formed between longitudinal yarns and transverse yarns are distributed such that at least one group with five bond points exists that have a mutual distance corresponding to a pitch number 2 or a progression number 2 , In this case, the embodiment can continue to be such that in the binding repeat at least one group with three binding points which have a mutual distance corresponding to a gradient number 2 or a progression number 2.

In a further advantageous alternative embodiment, provision can be made for the binding points formed between longitudinal threads and transverse threads to be distributed in a weave repeat of the second fabric layer in such a way that at least one group with four binding points exists which have a mutual distance corresponding to a pitch number 2 or an increment number.

In order to obtain a very stable connection between the two fabric layers and also to reduce the risk of marking the web material to be produced by introducing the binding threads, it is proposed that the binding threads form binding yarn pairs, each binding yarn pair in the longitudinal direction or in the transverse direction between two Threads of the first fabric layer and two threads of the second fabric layer runs.

In this case, the procedure is advantageously such that in each case one binding thread of a pair of binder threads binds with threads of the first layer of fabric, while the other binding thread of this pair of binder threads binds with at least one

Thread of the second fabric layer binds, and that change in a crossing point, the two binding threads of the binder thread pair, so that the other

Binding thread binds with threads of the first fabric layer, while a binder thread binds with at least one thread of the second fabric layer.

The crossing points of adjacent pairs of binder threads can form a regular crossing point pattern. It is also proposed that in the case of two binder thread pairs running directly next to one another no binding thread binds to the same thread of the second fabric layer.

In order to avoid adverse effects caused by excessive disorder or asymmetry in the fabric tape, it is proposed in that at least some of the binding points formed between binding threads and threads of the second fabric layer form a regular bond dot pattern.

Furthermore, in an advantageous embodiment it can be provided that no binding thread binds to a thread of the second fabric layer, with which a thread extending directly next to this binding thread binds to the second fabric layer. In this way it can be avoided that a binder thread binds with a thread of the second fabric layer, which is strongly curved due to its immediately adjacent bond with another thread of the second fabric layer, so that due to the existing curvature there a binding thread binding there laterally could be moved.

In an alternative embodiment of a fabric tape according to the invention it is proposed that the irregular satin weave is an irregular 6-bind satin weave. Here, too, there is the elementary advantage that due to the irregularity of the satin weave, no binding diagonals are created which are evident on the first fabric layer and thus bring with it the danger of marking in the web material to be produced, for example paper.

Also in this embodiment it is advantageous if the first fabric layer and the second fabric layer are constructed with longitudinal threads running in a band longitudinal direction and transverse threads running in a band transverse direction and if the floats of the transverse threads of the second fabric layer on the side facing away from the first fabric layer side of the longitudinal threads second fabric layer run.

The longitudinal threads can be warp threads and the transverse threads weft threads.

The fabric tape of the invention may be further constructed so that the longitudinal threads of the second fabric layer extending in a band longitudinal direction and / or the transverse threads of the second fabric layer running in a transverse direction of the band are arranged substantially equidistant from each other.

Alternatively, it is possible for the longitudinal threads of the second fabric layer running in one longitudinal direction of the tape and / or the transverse threads of the second fabric layer extending in a transverse direction to be paired, the thread spacing in a respective pair being smaller than the spacing between a pair and a pair Pair of adjacent thread. In such an embodiment of the fabric tape, which could be considered disadvantageous due to the uneven distribution of the longitudinal threads or transverse threads in the second fabric layer ais, this grouping can be used to thread pairs in a particularly advantageous manner when between the first fabric layer and the second fabric layer a shot ratio or / and a chain ratio of 2: 3. This means that in each case two threads, for example warp threads, of the first fabric layer are assigned to three threads of the second fabric layer. If this then continues to ensure that over a gap between a pair and this adjacent thread of the second fabric layer runs a thread of the first fabric layer, the relative position of the respective threads of the first fabric layer and the second fabric layer is selected so that the two fabric layers can be very close to each other, resulting in a very thin fabric tape.

Furthermore, the grouping into thread pairs can advantageously be used if there is a weft ratio or / and a warp ratio of 3: 3 between the first fabric layer and the second fabric layer. In this case, it can be provided that in a space between a pair and a thread of the second fabric layer adjacent thereto, a binding thread which produces the connection between the first fabric layer and the second fabric layer is integrated into the second fabric layer. By incorporating such a connection placing binding thread in the second fabric layer where there is a slightly greater distance between pairs of threads, a particularly advantageous in terms of dewatering mark construction is obtained.

Furthermore, the present invention relates to a method for producing a fabric tape for a machine for producing web material, in particular paper or cardboard, in which method the fabric tape is woven with a web material side first fabric layer and a machine side second fabric layer, wherein the first fabric layer and the second fabric layer by connective threads, and wherein the second fabric layer is woven with an irregular atias weave.

The present invention will be described below with reference to the accompanying drawings

Drawings described in detail. It shows:

1 shows a binding pattern containing a plurality of binding repeats of a running side or machine side second fabric layer of a fabric tape according to the invention;

Fig. 2 is a sectional view of a weave repeat of the weave pattern illustrated in Fig. 1 illustrating the eight thread groups appearing in the weave repeat;

Fig. 3 is a view corresponding to Fig. 1, which the binding points of the running side fabric layer per se and also in the laufseitägen

Fabric layer occurring binding sites of binding threads;

Fig. 4 is a representation corresponding to FIG. 1 of an alternative

Ausgestaltungsgform;

Fig. 5 is a representation corresponding to FIG. 2 of the shown in Fig. 4

Design shape; FIG. 6 shows a representation corresponding to FIG. 3 of the embodiment shown in FIGS. 4 and 5;

FIG. 7 shows a further illustration corresponding to FIG. 1 of an alternative embodiment; FIG.

FIG. 8 is a representation corresponding to FIG. 2 of the embodiment shown in FIG. 7; FIG.

9 shows a representation corresponding to FIG. 3 of the embodiment of FIGS. 7 and 8;

Fig. 10 is another of FIG. 1 corresponding representation of an alternative

Design shape;

FIG. 11 is a representation corresponding to FIG. 2 of that shown in FIG

Design shape;

FIG. 12 shows an illustration corresponding to FIG. 3 of the embodiment of FIGS. 10 and 11;

FIG. 13 shows a representation corresponding to FIG. 2 of a further alternative embodiment; FIG.

FIG. 14 is a view corresponding to FIG. 3 of the embodiment shown in FIG. 13; FIG.

FIG. 15 is a representation corresponding to FIG. 2 of a further alternative embodiment; FIG.

FIG. 16 is a representation corresponding to FIG. 3 of the embodiment shown in FIG. 15; FIG. FIG. 17 is a representation corresponding to FIG. 2 of a further alternative embodiment; FIG.

FIG. 18 is a representation corresponding to FIG. 3 of the embodiment shown in FIG. 17; FIG.

FIG. 19 shows a diagram illustrating the course of the binding threads in the web material-side fabric layer in two adjacent binding reports; FIG.

FIG. 20 is a representation corresponding to FIG. 2 of a further alternative embodiment; FIG.

FIG. 21 shows an illustration corresponding to FIG. 3 of the embodiment shown in FIG. 20; FIG.

FIG. 22 is an illustration corresponding to FIG. 19 of the embodiment shown in FIGS. 20 and 21; FIG.

FIG. 23 shows a representation corresponding to FIG. 2 of a further alternative embodiment;

FIG. 24 is a view corresponding to FIG. 3 of that shown in FIG

Design shape;

FIG. 25 shows an illustration corresponding to FIG. 19 of the embodiment of FIGS. 23 and 24;

FIG. 26 shows a binding pattern illustrated in the manner of a binding cartridge for an alternatively constructed inventive fabric band with 6-binding irregular atlas; FIG.

FIG. 27 shows a plurality of adjacent binding groupings. FIG. reported the figure 26;

Fig. 28 is a plan view of a machine-side second fabric layer with

Warp atlas in the bond repeat shown in Fig. 26;

FIG. 29 shows a representation corresponding to FIG. 28 with shot atlas; FIG.

Fig. 30 is a representation corresponding to FIG. 28 with pairing of

Wefts;

Fig. 31 is a representation corresponding to FIG. 28 with pairing of

warp;

FIG. 32 shows a warp cut of a fabric tape having a warp ratio of 2: 3; FIG.

Fig. 33 shows an alternative warp cut of a fabric tape having a warp ratio of 3: 3 and warp weave.

FIGS. 1 to 3 illustrate a first embodiment of a fabric tape 101 according to the invention, which can be used in particular as a forming fabric in machines for producing paper or board material. This fabric tape 101 is constructed with two fabric layers, namely an upper web material side first fabric layer 100 recognizable in FIG. 2 and a lower, machine side second fabric layer 102. The first fabric layer 100 provides the surface with which the finished web material comes into contact comes. The second fabric layer 102 provides the back of the fabric belt 101, with which this is guided over different guide or drive rollers.

FIG. 1 illustrates a weave pattern of the second fabric layer 102 over a plurality of weave patterns, each extending over eight longitudinal threads extending in the machine direction MD, that is generally the longitudinal direction of the fabric tape 101, and eight in the transverse direction CMD extending transverse threads extends. In the following it will be assumed that the threads running in the machine direction MD are the warp threads during the production process, while the threads extending in the transverse direction CMD are weft threads. 2, the eight weft thread groups 1 to 8 of a binding repeat and their interaction with the warp threads 1 to 16 of the same repeat are shown. From these warp threads run the odd-numbered warp threads 1, 3, 5, 7, 9 11, 13, 15 in the first fabric layer 100, while the even numbered warp threads 2, 4, 6, 8, 10, 12, 14, 16 extend in the second fabric layer 102.

In the example illustrated in FIGS. 1 and 2, each of the thread groups 1 to 8 for the first fabric layer 100 and the second fabric layer 102 each comprise a weft thread 104 or 106 and a pair of binding threads 108, 110. These binding threads 108, 110 provide a firm connection between the two fabric layers 100, 102 ago.

In addition, in FIG. 1, each box of a binding repeat represents a crossing point of one of the warp threads 2 to 16 with the associated weft thread 106. If an "X" is entered in one of the boxes, a binding point is also created at this crossing point, in which a In those boxes in which no "X" is entered, the weft threads 106 each extend below the warp threads 2 to 16 of the second fabric layer 102, ie extend on the side facing away from the first fabric layer 100. Each "X" thus represents a so-called warp reduction in the second fabric layer 102.

Similar to FIG. 1, FIG. 3 shows weave repeats of the second fabric layer 102, the binding points of the weft threads 106 with the warp threads 2 through 16 of the second fabric layer 102 being not only marked by marking respective boxes, but also FIG Bonding points of the binding threads 108 and 110 in the second fabric layer 102 illustrated are. In Fig. 3, each black-colored box represents a bonding point of a weft thread 106 with a respective one of the warp threads, that is, a warp reduction. The boxes marked with an "O" represent, as also illustrated in Fig. 2 in the thread group 1, a binding point of a respective binding thread 110 with a warp thread 2 to 16 of the second tissue layer 102, while the boxes marked "X" represents a binding point of the binding thread 108 with a respective one of the warp threads 2 to 16 of the second fabric layer 102. A binding point of a respective binding thread 108 or 110 with a warp thread 2 to 16 of the second fabric layer 102 is formed in each case by bonding the binding thread 108 or 110 on the outside of the involved warp thread 2 to 16, ie, with respect to the respective binding thread 108 or 110 is a warp.

It can be seen in the first embodiment shown in FIGS. 2 to 3 that the binding pattern selected for the second fabric layer 102 is an irregular 8-bonded satin weave, ie a weave in which a weave repeat over eight weft threads and the same number of warp threads the considered fabric layer extends. Thus, for example, in the binding repeat illustrated in FIG. 1 at the top left, which extends over the thread groups 1 to 8 and the warp threads 2 to 16, one can see that, as is required for an atlas weave, none of them follow one another in the warp direction Thread groups formed bond points adjacent to binding points of the immediately adjacent thread group. In the warp direction or in the weft direction is located between each two crossing points at least one thread group or at least one warp thread. As can be seen in the eight groups of yarns 1 to 8 which can be seen in FIG. 2, the weft threads 106 extend where they do not bind with warp threads, that is to say where no warp decreases are present on the outer side of the fabric tape 101, that is to say on FIG The first fabric layer 100 remote side of the second fabric layer 102. There, they form floats each time over 7 warp threads of the second fabric layer 102, with the result that almost the entire run-side surface by the weft threads 106 ready-. is gestelit. Only where weft threads 106 bind with respective warp threads 2 to 16, ie where there are chain sinks, is a section of the involved warp thread represented by a respective binding point on the fauf side surface. This initially makes it possible to achieve a very high level of stability by selecting the weft threads 106 from the material which is particularly suitable with regard to the wear load that occurs. At the same time, the warp threads 2 to 16 of the second fabric layer 102, which are essentially not exposed to the wear and tear contact with rolls or the like, can be selected from a material which has a particular tensile strength, such that the fabric tape 100 according to the invention is produced by these warp threads 2 to 16 of the second fabric layer 102 in the band longitudinal direction MD has a particularly high tensile strength. The warp threads 1 to 15 of the first fabric layer 100, as well as the weft threads 104 of the first fabric layer, can be selected from materials which are particularly suitable for contact with the web material to be produced or the starting material therefor. In particular, it becomes possible to use thinner threads here and to interweave them in such a way that, in interaction with the binding threads 108, 110 binding the warp threads 1 to 15 of the first fabric layer 100 between two weft threads 104 of the first fabric layer 100, a plain weave is attached to the web material side is formed. Here, it should be noted that each pair of binding threads 108, 110 is woven so that, as seen for example in Fig. 2 on the basis of the thread group 1, where the binding thread 108 with the warp threads 1 to 15 of the first fabric layer 100 in the manner of Plain weave sets, the other binding thread 110 has a point of attachment to the warp threads 2 to 16 of the second fabric layer 102. After a crossing point of the two binding threads 108, 110 lying between the two warp threads 9 and 10, the binding thread 110 forms a plain weave together with the warp threads 1 to 15 of the first fabric layer 100, while the warp thread 108 forms a binding point with one of the warp threads 2 to 16 the second fabric layer 102 forms. Thus, the two binding threads 108, 110 of a respective pair of binder threads in the first fabric layer 100 together form a weave pattern, which corresponds to that of a single weft thread of a plain weave. This results in a very finely structured, a plurality of support points providing surface of the first Gewebeiage 100 with correspondingly lower Markierungsneiguπg.

The low marking tendency is thereby also still supported, that, as already mentioned, the satin weave selected according to the invention is irregular. Recognizable areas are also formed in FIG. 1, in which the binding points "X" of the weft threads 106 with the warp threads 2 to 16 are closer together, while other areas arise in which greater distances exist between the individual binding points "X" , Where the bonding points are closer together, almost a bond point density is obtained which corresponds to that of a plain weave, which also makes a very flat surface overall. In those areas in which there are larger distances between the bonding points, ie correspondingly longer floats of the weft threads 106 or the warp threads 2 to 16 are present, a very smooth, almost unstructured surface is present. It lacks the dominant for the regular atlas binding dominant diagonals. All this means that the risk that a very regular bond dot pattern formed in the second fabric layer 102 will be seen through the first fabric layer 100 into the web material to be produced is largely avoided. For this purpose, it is particularly advantageous, as is also illustrated in FIG. 1, when, within a binding repeat extending over eight weft threads and eight binding threads of the second fabric layer 102, ie the smallest binding pattern unit in the warp direction and in weft direction, two groups of binding points are present, in which the individual binding points have a distance from each other, which corresponds to a gradient number 2 or corresponds to a progression number 2. This can be seen in Fig. 1 by the arrows. An inclination number of 2 here means that there is a weft thread group between two considered binding points. A progression number 2 means that between the two considered Binding points a warp thread lies. It should be pointed out here that in FIG. 1 the weave repeat considered for this example starts at the second weft thread group 8, viewed from above, and ends at the first weft thread group, which is viewed from above and designated 7. Of course, any group of crossing points extending over eight arbitrary weft threads 106 and warp threads of the second fabric layer 108 can be represented as a binding repeat.

From Fig. 2 it can be seen further that in the respective binder thread pairs 108, 110 of the eight consecutive thread groups 1 to 8 of a binding repeat the crossing points are placed alternately. Thus, while the first crossing point of the binding threads 108, 110 lies between the warp threads 9 and 10, the crossing point of the binding threads 108, 110 of the second thread group 2 lies between the warp threads 5 and 6. The crossing point of the binding threads 108, 110 of the third thread group 3 in turn lies between the warp threads 9 and 10, while the crossing point of the binding threads 108, 110 of the fourth thread group is again between the warp threads 5 and 6. In this way, a very symmetrical connection between the two fabric layers 108, 110 is obtained, so that no elementary these fabric layers can arise laterally with respect to each other warping forces. At the same time one of the irregularities of the binding points of the weft threads 106 is achieved with the warp threads 2 to 16 superimposed regularity, which has proven to be particularly advantageous in terms of reducing the tendency to mark.

Furthermore, there is a general tendency to symmetrically place the point of attachment of a respective binding thread 108 or 110 in the second fabric layer 102 with respect to the binding points that the other of these binding threads has in the first fabric layer 100. This is illustrated, for example, by the example of the thread group 3. There, the binding line 110 marked with a dot line binds over the warp threads 3 and 7 of the first fabric layer 100. In association with it, it binds with a continuous thread Line, shown binder line 108 with respect to these binding points symmetrically below the warp 6 of the second fabric layer 102. Where this binder thread 108 then over the warp threads 11 and 15 of the first fabric layer 100 sets, binds the binder thread 110 symmetrically thereto under the warp thread 14 of the second fabric layer 102nd This requirement is broken only where, as illustrated, for example, by the two weft thread groups 1 and 2, a binding thread in the second fabric layer 102 would have a binding point immediately adjacent to a point of bonding of a weft thread 106 in the second fabric layer 102 with the same warp thread is adjacent. Namely, in order to obtain the above-mentioned advantageous symmetrical configuration, the binder thread 110 of the first thread group 1 would have to set below the warp thread 6 of the second fabric layer 102, not under the warp thread 8. However, with this warp thread 6, the immediately adjacent weft thread 106 of the second thread group binds , This binding point in the second thread group causes the warp thread 6 to be comparatively strongly curved in this local area. If the binding thread 110 of the first thread group were to set with the warp thread 6, the associated binding point _π O "would be in a region in which the warp thread 6 is comparatively strongly curved, which could lead to undesired shifting of the binding thread 110 in the warp direction Shifting the binding point to the next, adjacent warp thread of the second fabric layer 102 can be counteracted to this problem.

Further, in the bonding pattern of the binding threads 108, 110 shown in Fig. 2, it is ensured that no binding points of respective binding threads immediately adjacent to each other in the warp direction are present with the same warp thread. There is always an offset around at least one warp thread. This can clearly be seen also in FIG. 3, where there are not two consecutive binding points of the binding threads of different, directly successive pairs of binding threads lying one above the other in the warp direction.

However, it is generally recognized that the binding threads 108, 110 also engage Form binding pattern with a binding repeat, which extends over eight warp threads, so that both for the between the weft threads 106 and the warp threads 2 to 16 of the second fabric layer 102, as well as for the binding threads 108, 110 of the same binding repeat is present. As a result, an overall weave repeat can also be obtained for the entire fabric tape 100, which extends over eight warp threads and over eight weft threads or weft thread groups.

FIGS. 4 to 6 show an embodiment in which an irregular eight-binding satin weave is provided for the second fabric layer 102, that is to say the weave pattern of the weft threads 106 with the warp threads 2 to 16 of this second fabric layer 102. However, the bonding points are slightly different than in the embodiment described above. This leads, for example, to the fact that, as can be seen in FIG. 4, a group of five binding points "X" is present here within a binding repeat in which the binding points are spaced apart by the pitch number 2 and the progression number 2, respectively. In the case of a binding repeat chosen differently, there are two groups with each three binding points in which the number of inclines or the progression number 2 is present. As in the previously described embodiment, there are also local areas in which, for example, three binding points are regularly spaced on a straight line Subsequently, however, this pattern or this regularity is broken again, so that comparatively short, less dominant binding diagonals are present, which are practically not apparent in the web material to be produced.

5 and 6 that, even in this embodiment, the crossing points of the two binding threads 108, 110 change regularly, and that the binding points of a respective binding thread 108, 110 in the second fabric layer 102 are also attempted symmetrically with respect to that of the other binding thread in this loca- len area formed binding points in the first fabric layer 100 is to be positioned. Where this could lead to an impairment of the position of the binding point of a binding thread due to the binding points of the weft threads 106 with the warp threads 2 to 16, this binds again with an adjacent warp thread. However, it can be seen in Fig. 6 that similarly, as can also be seen in Fig. 3, the bonding points "O" and ₍ "X" form an approximately regular pattern, namely close to respective imaginary diagonals The irregular satin weave binding to a very low marking tendency and above all provides for a symmetrical force distribution in the mutual connection of the two fabric layers 100, 102.

A third embodiment is shown in Figs. 7 to 9. Again, the weft threads 106 bind with the warp threads 2 to 16 of the second fabric layer 102 in the pattern of an irregular 8-binding atlas. Since, however, the position of the binding points "X" in FIG. 7 is selected somewhat differently with respect to the embodiments described above, local areas arise in which, as indicated by arrows in FIG. 7, four binding points "X" lie with respect to one another in that they have a mutual distance corresponding to the increase number 2 and the progression number 2, respectively. These groups, each with four adjacent bond points, form stabilization zones with reinforced warp-weft anchorage. The irregularity with the avoidance of dominant diagonals introduced by the irregular satin weave is superimposed here on a regularity in the arrangement of these groups of four binding points with a small mutual distance, which again turned out to be particularly advantageous with regard to the reduction of the marking tendency. The dominant diagonals of the regular atlas binding can not arise, since the "diagonals" defined by two binding points do not continue with the next but four group of binding points.

With regard to the integration of the binding threads 100, 102 corresponds to in the Figures 7 to 9 shown Ausgestajaungsform the previously described.

A further alternative embodiment is shown in FIGS. 10 to 12. Again, the binding pattern of FIG. 10 shows the irregular 8-binding atlas binding, wherein within a binding repeat of the second fabric layer 102 again two groups of binding points "X" are present, which have a mutual distance with a slope number or a progression number 2. Although the bond points of a given group lie on a straight connecting line, these lines do not find continuation in the immediately adjacent binding repeats, so that here too no dominant diagonals exist.

As stated above, in the embodiments described above, between the binding points of a binding thread and a weft thread 106 with the same warp thread of the second fabric layer 102 there is at least one weft thread that does not bind with this warp thread, ie floats under it. In the embodiment of FIG. 4, this minimum distance is defined by two such non-binding, but floating weft threads 106. Otherwise, the binding pattern of the binding threads 108, 110 of the embodiment of FIGS. 10 to 12 essentially satisfies the requirements described above. That is, the crossing points of the two binding threads 107, 110 alternate alternately. The binding points "O" and "X" which can be seen in FIG. 12 are also approximately located again on diagonals, that is to say they are also arranged comparatively regularly and superposed by the irregular satin weave.

With regard to the weave pattern of the weft threads 106 and the warp threads 2 to 16 of the second fabric layer 102, the further embodiments described below are configured as shown in FIG. 7. Reference is therefore made to FIG. 7 for avoiding repetition , A difference exists in the variant shown in FIGS. 13 and 14 in the way in which the binding threads 108, 110 are woven. Here, it is fundamentally provided that both binding points of the binding threads 108 and 110 of a thread group in the second fabric layer 102 are not symmetrical relative to the binding points of the other binding thread in the first fabric layer 100 within a binding repeat. One of the binding points in the second fabric layer is in each case laterally shifted a warp thread starting from a symmetrical arrangement with respect to the binding points in the upper, first fabric layer 100. Another requirement that the twine follows is that the distance of a point of bonding in the bottom fabric layer 102 to a point of bonding a weft 106 having the same warp of the warp yarns 2 to 16 include at least two such weft yarns 106. Thus, between each binding point of a weft thread 106 with a warp thread and a binding point of the same warp thread with a binding thread are at least two weft threads 106 which float under this warp thread away.

Further, the binding threads 108, 110 here satisfy the law that when, in a binding thread pair, one of the binding points in the second fabric layer 102 is laterally displaced from the symmetrical positioning, for example to the left (eg thread group 1 in FIG. 13) and at the next thread group or the binding thread pair 108, 110, the non-symmetrically arranged binding point of a binding thread in the second fabric layer 102 to the other side, so here shifted to the right (thread group 2 in Fig. 13), these two considered binding threads, so for example the binding thread 13 of the first thread group in FIG. 13 and the binding thread 108 of the second thread group in FIG. 13, under the same warp thread, namely the warp thread 4 of the second fabric layer 102, thus forming a binding point "O" or "X" there, respectively between these two binding points a weft, namely the weft 106 is located. In the immediately following group, comprising two pairs of Binding pairs 108, 110, in the example under consideration thus comprising the two thread groups 3 and 4, is the first binding point of a binding thread in the other direction, ie shifted to the right (binding thread 108 of thread group 3), while the second non-symmetrical binding point in the likewise opposite direction, so here then shifted to the left (binding thread 108 of thread group 4). These also bind under the same warp thread, namely the warp thread 8 of the second fabric layer. This alternating pattern is then repeated for the thread groups 5 to 8, so that overall, the non-centrally arranged binding points of the binding threads 108 and 110 in the fabric layer 102 represent an alternating left-right offset, so form a regular pattern, in superposition again particularly advantageous with the irregular 8-bind satin weave. This is also helped by the fact that, as can be seen in FIG. 13, the crossing points of the binding threads 108, 110 again have the alternating offset already explained above. Here, therefore, a total irregularity in the arrangement of the crossing points of the binding threads and a regularity in the arrangement of the binding points of the binding threads or also of the symmetrical structure lateral deviation of the binding points of the binding threads is superimposed on the irregular satin weave. These regularities at the points of intersection and the binding points can each be expressed in that they lie on diagonals or have an alternating offset in both directions.

FIGS. 15 and 16 show, similar to FIGS. 13 and 14, another alternative embodiment which, in terms of the weave pattern, of the second fabric layer 102 corresponds to the embodiment shown in FIGS. 7 to 9. A difference resides in the way in which the binding threads 108, 110 are woven into the fabric band 101. Here, too, care is taken in the manner of incorporating these binding threads 108 and 110 that the irregular 8-binding satin weave is superimposed on a regular binding structure in the binding threads 108, 110. Here, one first recognizes a regularity in that in each case two directly successive weft thread groups are identical to one another with regard to the integration of the binding threads 108, 110. These are thus the weft thread groups 1 and 2, 3 and 4, 5 and 6, 7 and 8. These mutually identically arranged pairs of binding threads 108, 110 are each characterized by a weft thread 104 in the first fabric layer 100 and a weft thread 106 in the second fabric layer 102 separated from each other. It can be seen further that in the weft thread groups 1 and 2, 5 and 6, the crossing points of the binding threads 108, 110 each lie between the warp threads 9 and 10, while in the weft thread groups 3 and 4, 7 and 8, these crossing points between the warp threads 5 and 6 lie. So here again the alternating change of crossing points is available. The binding points in the second fabric layer 102 are again laid in such a way that one of them is laterally displaced out of the symmetrical positioning with respect to the overlying binding points of the other binding thread in the first fabric layer 100. In particular, in all such laterally shifted binding points, an offset to the same side, here to the left exists.

Further, in FIGS. 15 and 16, it can be seen that between a binding point of a binding thread 108 or 110 with a warp thread 2 to 16 of the second fabric layer 102 and a binding point of this warp thread of the second fabric layer 102 with a weft thread 106 of the second fabric layer 102 at least two such weft threads 106, which do not tie with this warp thread and float under this past.

FIG. 16 clearly shows an aspect which is or may be provided in the case of the other embodiment variants according to the invention. If, for example, one considers the first thread group, comprising the weft thread 1 and the two binding threads 1, 2 in FIG. 16, then in the warp direction the binding thread 108 first follows the weft thread 106 of the second fabric layer 102 present in this thread group 1 and forms the binding point "X" with the warp thread 14. The binding thread 110 then follows in the warp direction and forms the binding point "O" with the warp thread 4. In the next thread group, ie the thread group 2 with the binding threads 3, 4, the binding thread 110 follows first and forms the binding point "O". This is followed in the warp direction by the binding thread 108 for forming the binding point "X", here with the warp thread 14. This means that the entry of the binding threads changes in the warp direction of successive weft thread groups, which also has a particularly advantageous effect on the surface structure of the first fabric layer 100 and helps avoid marking effects.

Another variant of a tissue band 101 is shown in FIGS. 17 to 19. Again, the weave pattern of the second fabric layer 102 corresponds to that shown in FIG. When the binding threads 108, 110 are incorporated, an elementary difference is primarily that, in the weft thread groups 1 to 8, the binding thread 110 and then the binding thread 108 in the lower fabric layer 102 alternately binds with two immediately adjacent warp threads of the lower fabric layer 102. In this way, the overall binding structure is further consolidated. Specifically, in FIGS. 17 and 18, it can be seen that the location of these double bond points "OO" and "XX" is selected to have regularity in the arrangement insofar as diagonal lines are formed on which these double bond points are formed lie. The individual binding points of the binding threads 108, 110 in the second fabric layer are selected so that they lie on diagonals. As a result, even for the sections of these binding threads 108, 110 forming a plain weave in the first fabric layer, a very regular distribution results, which is shown in FIG. 19. Here, the weft thread groups 1 to 8 each show the twine portions of the binding threads 108, 110, as they are on the upper side of the first fabric layer 100. It can be seen that a diagonal progression pattern is obtained for the individual sections of the two binding threads 108, 110, ie the sections of these binding threads 108, 110 forming a plain weave on the first fabric layer 108 are generally arranged in the warp direction each results in an offset, for example, each two adjacent binding threads 108 or 110 adjacent weft thread groups are identical involved, so have no lateral offset in the weft direction. Also, this offset or pairwise offset of the plain weave forming portions of the binding threads 108, 110 in the first fabric layer 100 contributes to superimposing a weave pattern with greater regularity on the irregular weave pattern of the 8-bonded irregular atlas of the lower, second fabric layer 102.

FIGS. 20 to 22 show a variant that approximately corresponds to the embodiment described above with reference to FIGS. 17 to 19. Here, too, the binding threads 108, 110 alternately bind with two warp threads of the second fabric layer. In the binding recognizable in FIG. 20, the points of intersection of adjacent weft thread groups alternate back and forth, ie once between the warp threads 9 and 10 and once between the warp threads 5 and 6. This combined with the double binding points leads in each case to a binding thread 108 or 110 to the pattern illustrated in FIG. 22, in which in adjacent weft thread groups in each case identical binding threads have a progressive offset in the weft direction with their sections forming a plain weave in the first fabric layer 100.

Previously, weave patterns woven in a so-called 2: 1 weft ratio were described with reference to FIGS. 1 to 22, respectively. That is, on two weft threads present in the first fabric layer 100, there is a weft thread present in the second fabric layer 102. This is illustrated, for example, with reference to FIG. 20 and with reference to the weft thread groups 1 and 2. There, in the first fabric layer 100, the weft thread 104 of the first weft thread group 1, the "weft thread", is formed by the two plain weaves forming sections of the binding threads 108, 110 , the weft thread 104 of the second weft thread group and the "weft thread" formed by the plain weave Thus, a total of four "weft threads" are present in the first fabric layer 100, while only the two weft threads 106 of the two weft thread groups 1 and 2 are present in the second fabric layer 102. This corresponds to one Ratio of 4: 2, ie 2: 1, which is considered to be particularly advantageous due to the relatively high proportion of weft threads in the first fabric layer, that is, the support points for the fabric layer to be produced web material.

Figs. 23 to 25 show an embodiment in which a weft thread ratio of 3: 2 is present. This, too, is explained again, for example, with reference to the weft thread groups 1 and 2 recognizable in FIG. 23. There are in the first fabric layer 100 of the weft 104 of the first weft thread group 1, the plain weave portions of the binding threads 108 and 110 of the first weft thread group 1, so together again give a "weft", and the weft thread 104 of the second weft thread group 2. Auf These three weft threads of the first fabric layer 100 are the two weft threads 106 of the first weft thread group 1 and the second weft thread group 2, so that the ratio is 3: 2. Even with such a weft ratio, the principle of the present invention can be used 106 and the warp threads 2 to 16 of the second fabric layer 102 are in principle interwoven again, as can be seen in the example of Fig. 7, thus forming an irregular 8-bonded satin weave with the resulting advantages of the plain weave forming portions of the binding threads 108th , 110 are again arranged so that s I give diagonal strips, in each of which such sections in the first Gewebeiage are present, so that also form the intersections in Fig. 25 recognizable intersection points, as was the case with the embodiments described above, form a correspondingly diagonal pattern. A further alternative embodiment of a fabric tape constructed in accordance with the invention which can be used as a forming fabric in papermaking machines is explained below with reference to FIGS. 26 to 33. FIG. 26 shows a weave repeat of the machine-side or run-side second fabric layer, which, as is also the case with all of the above-described fabric tapes, extends over the same number of warp threads and weft threads. Also in the illustration of Fig. 26, the rows of boxes respectively correspond to weft threads, while the columns of boxes represent warp threads.

It can be seen that in the binding repeat shown in FIG. 26 there is an irregular 6-binding atlas binding. In each of the binding points represented by an "X", a weft thread passes over a warp thread, while in the unmarked box, the weft threads pass under the warp threads, so there is provided a warp atlas which, due to set irregularity, brings about the same effects as above The avoidance of pronounced diagonals which could appear on the first fabric layer, that is to say the fabric layer which comes into contact with the web material to be produced, can be described in particular when used in combination with such an irregular 6-bonded satin weave For example, with a plain weave for the first fabric layer, it is again ensured that regular and irregular weave patterns are superimposed on one another, and consequently the advantageous effects described above are achieved ensured that, for example, the weft threads provide almost the entire machine-side surface and thus the wear on this comparatively highly stressed side can be kept low by appropriate choice of material. By selecting weft threads with a larger diameter, a correspondingly larger wear volume can be provided.

By using such an irregular 6-bind satin weave, In the case of an atlas weave whose weave repeat extends in the weft and warp direction over the same number of threads, in this case six threads each, a high quality fabric tape is obtained whose material properties and build properties can be influenced in various ways, as follows explained. For example, with reference to the binding shown in FIG. 28, which shows the second fabric layer 102 from above, that is to say on its side facing the first fabric layer, it can be seen that, with the use of the binding repeat with irregular 6-bind satin weave shown in FIG the second fabric layer, a structure can be obtained, in which the mutual distance of the again horizontally extending weft threads over the entire second fabric layer 102 is approximately equal. The same applies to the mutual distance of the vertically extending warp threads. The same can be achieved if, as shown in Fig. 29, the same binding repeat is used to construct a so-called shot atlas. In contrast to the chain atlas shown in FIG. 28, here the weft threads float on the side facing the first fabric side, so that the warp threads float on the rear side, that is to say the running-side surface of the fabric tape. The choice as to whether a warp atlas or a weft atlas is to be used can in particular also be made depending on which of the threads warp threads or weft threads are to run in the machine direction and which in the cross machine direction. The uniform spacing of both the warp threads and the weft threads shown in FIGS. 28 and 29 superimposes a regular distribution of the threads contributing thereto to the irregularity of the six-ply satin weave.

As a departure from this regular thread arrangement, as shown in FIGS. 30 and 31 by means of a chain atlas, a pairwise grouping of the weft threads, as shown in FIG. 30, or of the warp threads, as shown in FIG. 31, can also be achieved. For example, it can be seen in FIG. 30 that the weft threads 1 and 2 or 5 and 6 respectively are within the weave repeat comprising the weft threads 1 to 6 and the warp threads 1 to 6 Thread pairs biiden, wherein the threads 3 and 6 of this binding repeat form inter-pair threads, so threads that have a greater distance to the two adjacent pairs of threads with the threads 1, 2 and 4, 5, ais the threads within a pair of yarns. The same applies to the pairwise grouping of the warp threads shown in FIG. 31, wherein the warp threads 2 and 3 or 5 and 6 each form a thread pair within the illustrated or numbered weave repeat, while the warp threads 1 and 4 each lie between two thread pairs and to this have a greater distance than the threads within a respective thread pair.

This effect of grouping or pairing can be used according to the invention in an advantageous manner. This will be explained with reference to FIG. 32. A warp cut is shown there, that is to say, for example, a section of the binding in the weft direction shown in FIG. 31, in which the warp threads are therefore shown cut. One recognizes here also the warp threads of the first fabric layer 100, and one recognizes that here a warp ratio of 2: 3 is present. That is, on each two warp threads of the first fabric layer 100 are three warp threads of the second fabric layer 102. In this Kettverhältnis can then be further provided according to the principles of the present invention, that the warp threads of the first fabric layer 100 respectively where between two immediately adjacent Warp threads of the second fabric layer 102 a greater distance is present. That is, the warp threads of the first fabric layer 100 do not extend over or between the respective pair forming warp threads of the second fabric layer 102, but extend over the space between a thread of a thread pair, for example, the respective thread 3 of the thread pair 2-3, and a thread This ensures that the warp threads of the first fabric layer 100 can move closer to the warp threads of the second fabric layer 102, possibly even something can dive into the interspaces with a greater distance, so that at the same thread density, a fabric tape 101 can be obtained with a smaller thickness. Of course, this effect can also be used if, as shown in FIG. 30, the weft threads are grouped in pairs, in which case a shot ratio of 2: 3 can be selected.

The effect of the pairing can be further used to a very space-saving positioning of the binding between the first fabric layer 100 and the second fabric layer 102 producing binding threads. This will be explained with reference to FIG. 33. In the following, it is assumed that FIG. 33 also shows a warp cut, that is to say warp threads in section and cut in the weft direction. 33, the connection between the two fabric layers 100 and 102 is not realized by weft threads, as in the embodiments explained above, but by warp threads, with warp threads 200 and 202 also forming a warp thread pair that jointly forms the weave , As explained above with reference to the weft threads, one of these warp threads 200, 202 with the weft threads of the first fabric layer 100 forms a plain weave, for example, while the other of this warp thread pair 200 or 202 is integrated into the second fabric layer 102 and in this way After a change of these two warp threads then forms this other thread, the plain weave in the first fabric layer 100. With regard to the integration into the first fabric layer so a respective pair of warp threads 200 and 202 is actually regarded as a single warp.

It can also be seen in FIG. 33 that viewed in the weft direction, in each case two such pairs 200, 202 lie next to one another and in each case a single warp thread 204, which is integrated exclusively into the first fabric layer 100, runs between them. Since, as explained above, the warp threads 200, 202 of the first fabric layer 100 to be considered in pairs alternately and also as binding threads are to be interpreted as a single thread with regard to the integration into the first fabric layer 100 this type of binding on three warp threads of the second fabric layer 102 shown in FIG. 33 now has three warp threads of the first fabric layer 100. Here, therefore, a warp ratio of 3: 3 is present,

The pair formation in the second fabric layer 102 is used in this binding to that in each case where between two warp threads of the second fabric layer 102, a larger gap is created, so for example between the warp threads 3 and 4 or 4 and S _{1 of} that warp a respective Kettfadenpaars 200, 202 of the first fabric layer 100 is incorporated into the second fabric layer 102, which is currently not integrated into the first fabric layer 100. Since, in general, the threads, in particular the warp threads, of the first fabric layer 100 have a slightly smaller thickness than the threads of the second fabric layer 102, it is thus practically impossible to provide further space, the connection between the two fabric layers can be realized.

It should also be noted here that, of course, the connection between the two fabric layers 100 and 102 as described above can also take place by weft threads, in which case in particular the weft thread grouping shown in FIG. 30 can be used in the same way in the second fabric layer , in this case, the representation of Fig. 33 would be interpreted as a shot cut.

Influencing whether, as shown in Figs. 28 and 29, the weft yarns and / or the warp yarns should be evenly spaced, or whether, as shown in Figs. 30 and 31, pairwise grouping is obtained should, can be made in various ways. Thus, the influence of the type of weaving, that is, the predetermining of the ratio of the thread tension present in the weft threads in the weaving process to the tension present on the warp threads can take place. In general, the procedure is such that the tension of the warp threads is varied at basically fixed tension of the weft threads, so that in one Depending on the direction of deviation, either a grouping in the region of the weft threads or a grouping in the region of the warp threads can be achieved in the case of deviations from this range of tension, as shown in FIGS. 28 and 29. Also, by specifying the ratio of the diameters of the warp threads and the weft threads, the grouping can be achieved or prevented. Furthermore, the grouping can be enforced or the most uniform possible spacing of the individual threads can be obtained by the Füllcharakter, so the specification of the primary determined by the thread density per unit length of a woven tape and the thread diameter material filling. Here it is generally the case that the lower the weft thread density and the higher the warp thread density, the weft threads will dodge. There are therefore various parameters that can be set in web process, which, if set accordingly, lead to the desired weaving result.

It should be understood that, of course, the above-described embodiments of a fabric tape according to the present invention may be varied in various aspects without departing from the principles of the present invention. It is of course not mandatory that the paper-side fabric layer is made in plain weave. Other types of binding, such as twill weave, could be used. The connection between the two fabric layers, as shown above, can be a structural connection, in which warp threads or weft threads which produce this connection are also used to contribute to the bond present on the paper side or in the paper-side fabric layer , Alternatively, separate Bindekett- or binding weft threads can be used, which have only the task to make the connection between the two fabric layers to see, but otherwise not be used to realize a particular basic binding pattern in the paper-side fabric layer or the running side fabric layer. Also, it should be emphasized that the various previously shown Embodiments of the invention can be used in so-called high-shaft weaving machines, ie machines which have a very large number of shanks, for example up to 60 shafts.

In summary, it can thus be stated that an elementary advantage of the embodiment according to the invention is that an irregular satin weave is used, in which case the occurrence of dominant binding diagonals is avoided. Nevertheless, the invention uses the advantageous effect of comparatively long floats in the running, second fabric layer, whereby excessively long floats can be avoided, in particular when using a 6-cohesive or 8-cohesive satin weave. By combining the irregularity in the weave pattern of the running side, second fabric layer with certain regularities in the binding of the binding threads, particularly advantageous effects are achieved. These regularities may relate once to the position of the crossing points of the binding threads, but may also relate to the position of the binding points thereof in the second layer of fabric. In this case, the regularity can be generated by an offset of the crossing points or binding points proceeding in a same direction, or else by an alternating shifting back and forth of these points of intersection or binding points.

It should finally be pointed out that, with reference to the illustrated embodiments, the threads running in the transverse direction CMD were each represented as the weft threads and the threads running in the longitudinal direction MD were shown as the warp threads. Since in general such fabric tapes are longer than they are wide, this is a particularly advantageous variant, since in this way the number of warp threads to be provided can be kept smaller. Of course, the principles of the invention may also find application in fabric tapes in which the threads running in the longitudinal direction MD are the weft threads and those in the transverse direction CMD extending threads are the warp threads.

Claims

claims

1. fabric tape for a machine for producing Bahnmateriai, in particular paper or cardboard, comprising a web material side first fabric layer (100) and a machine-side second fabric layer

(102), wherein the first fabric layer (100) and the second fabric layer (102) are bonded together by binding threads (108, 110) and the second fabric layer (102) is woven with an irregular satin weave.

2. fabric tape according to claim 1, characterized in that the irregular satin weave is an irregular 8-binding satin weave.

3. fabric tape according to claim 1 or 2, characterized in that the first fabric layer (100) and the second fabric layer (102) in a tape longitudinal direction (MD) extending longitudinal threads and transverse in a transverse direction (CMD) transverse threads are constructed and that the floats the transverse threads of the second fabric layer (102) extend on the side of the longitudinal threads of the second fabric layer (102) facing away from the first fabric layer (100).

4. fabric tape according to claim 3, characterized in that the longitudinal threads are warp threads and that the transverse threads are weft threads.

5. fabric tape according to one of claims 1 to 4, characterized in that in a binding repeat of the second Fabric layer (102) distributed between the longitudinal threads and transverse threads binding points are distributed such that at least two groups with three bonding points exist, one of a slope number 2 or a Fortschrittungszah! 2 corresponding distance,

6, fabric tape according to one of claims 1 to 5, characterized in that in a weave repeat of the second fabric layer (102) the bond points formed between longitudinal threads and transverse threads are distributed such that at least one group exists with 5 bond points, the one of a pitch number 2 or / and a progression number 2 corresponding mutual distance.

7. fabric tape according to claim 6, characterized in that in the binding repeat also exists at least one group with three bonding points having a pitch 2 or a progression number 2 corresponding mutual distance.

8. fabric tape according to one of claims 1 to 7, characterized in that in a binding repeat of the second fabric layer (102) formed between the longitudinal yarns and transverse threads binding points are distributed such that at least one group exists with four bonding points, one of a slope number 2 or / and have a progression number corresponding mutual distance.

9. fabric tape according to one of claims 1 to 8, characterized in that the binding threads (108, 110) form pairs of binder yarns, each pair of binder yarns in the longitudinal direction or in

Transverse direction each extends between two threads of the first fabric layer and two threads of the second fabric layer.

10. fabric tape according to claim 9, characterized in that each binds a binder thread of a pair of binder yarns with threads of the first Gewebeiage (100), while the other binder thread (108, 110) of this pair of binder yarns with at least one thread of the second fabric layer (102) binds, and in that the two binding threads (108, 110) of the binding thread pair change at a crossing point, so that the other binding thread binds with threads of the first fabric layer (100), while the one binding thread binds with at least one thread of the second fabric layer (102).

11. fabric tape according to claim 10, characterized in that the crossing points of the adjacent pairs of binder yarns form a regular crossing point pattern.

12. fabric tape according to one of claims 9 to 11, characterized in that in two immediately adjacent pairs of binder yarns no binding thread (108, 110) with the same thread of the second fabric layer (102) binds.

13. Fabric tape according to one of claims 9 to 12, characterized in that at least a part of the binding threads (108, 110) and threads of the second fabric layer (110) formed binding points forms a regular bond dot pattern.

14. A fabric tape according to any one of claims 9 to 13, characterized in that no binding thread (108, 110) with a thread of the second fabric layer (102) binds, with which an immediately adjacent to this binder yarn extending thread of the second fabric layer (102) binds.

15. fabric tape according to claim 1, characterized in that the irregular satin weave a is irregular 6-bit satin weave.

16. fabric tape according to claim 15, characterized in that the first fabric layer (100) and the second fabric layer (102) in a band longitudinal direction (MD) extending longitudinal threads and in a transverse direction (CMD) transverse threads are constructed and that the floats of the transverse threads of the second fabric layer (102) extend on the side of the longitudinal threads of the second fabric layer (102) facing away from the first fabric layer (100).

17. fabric tape according to claim 16, that the longitudinal threads are warp threads and that the transverse threads are weft threads.

18. Fabric tape according to one of claims 15 to 17, characterized in that in a band longitudinal direction (MD) extending longitudinal threads of the second fabric layer (102) and / or in a transverse direction (CMD) transverse threads of the second fabric layer (102) substantially are arranged at a uniform distance from each other.

19. Fabric tape according to one of claims 15 to 17, characterized in that in a band longitudinal direction (MD) extending longitudinal threads of the second fabric layer (102) and / or transverse in a transverse direction (CMD) transverse threads of the second fabric layer (102) grouped in pairs are, wherein the thread spacing in a respective pair is less than the distance between a pair and a thread adjacent to this pair.

20. fabric tape according to claim 19, characterized in that between the first fabric layer (100) and the second fabric layer (102) a shot ratio and / or a Chain ratio of 2: 3 consists.

21, fabric tape according to claim 20, characterized in that over a gap between a pair and a thread adjacent thereto the second fabric layer (102) extends a thread of the first fabric layer (100).

22, fabric tape according to claim 19, characterized in that between the first Gewebeiage (100) and the second fabric layer (102) a shot ratio and / or a

Chain ratio of 3: 3 consists.

23. A fabric tape according to claim 22, characterized in that in a space between a pair and an adjacent thread of the second fabric part

(102) a binding thread (202) which produces the connection between the first fabric layer (100) and the second fabric layer (102) is integrated into the second fabric layer (102).

24. A method for producing a fabric tape for a machine for producing web material, in particular paper or cardboard, in which method the fabric tape (101) is woven with a web material side first fabric layer (100) and a machine side second fabric layer (102) the first fabric layer (100) and the second fabric layer (102) are joined by binding threads (108, 110) and wherein the second fabric layer (102) is woven with an irregular satin weave.