FABRIC TAPE

Description

[0001] The invention relates to a fabric belt, in particular a forming screen, for a machine for the production and / or processing of a fibrous web, comprising an upper fabric layer with upper longitudinal threads and upper transverse threads interwoven with these, as well as a lower fabric layer with lower longitudinal threads and lower transverse threads interwoven with these, wherein the two fabric layers are arranged one above the other in such a way that, in the intended use of the fabric belt, the upper fabric layer faces the fibrous web to be produced and the lower fabric layer faces away from the fibrous web to be produced.

[0002] Such a woven tape is known, for example, from publications WO 2013 / 160391 A1 and DE 10 2013 218 465 A1. In both publications, the woven tape has a different number of upper and lower longitudinal threads, the ratio of upper to lower longitudinal threads preferably not being a whole number. The multi-layered structure of the woven tape has the advantage that the upper longitudinal threads can be thinner than the lower longitudinal threads in order to provide the smoothest possible surface for the fiber web, whereas the lower longitudinal threads can be primarily designed to absorb the tensile forces acting on the covering and at the same time to withstand wear for as long as possible. While the woven tape in the first publication has more upper than lower longitudinal threads, the opposite is true for the second woven tape in the second publication.In both cases, however, the upper and lower longitudinal threads can be grouped together, differing in the number of longitudinal threads.

[0003] Especially when using such a woven tape as a forming screen for the production of a fiber web, it is undesirable for the tape to cause clearly visible marks in the fiber web being produced. Marks occur when the drainage of the fiber web is uneven. Since the water must flow around the longitudinal and transverse threads, the weave pattern influences the marking behavior of the woven tape. The lower longitudinal threads, in conjunction with the lower transverse threads, are primarily responsible for these so-called hydraulic marks. For this reason, efforts have historically been made to keep the spacing between the lower longitudinal threads in the transverse direction of the woven tape as constant as possible.

[0004] Nevertheless, it happens time and again that such a fabric tape leads to an undesirably large number of markings in the fiber web.

[0005] It is therefore an object of the present invention to solve or at least reduce the problem described above.

[0006] This problem is solved by a fabric tape according to the features of the independent claim. Further advantageous features are mentioned in the dependent claims.

[0007] According to the invention, the generic woven tape described above is characterized in that a first distance between two immediately adjacent lower longitudinal threads is greater than a second distance between two immediately adjacent lower longitudinal threads, wherein the difference between the first distance and the second distance is between 20% and 175% of a diameter of an upper longitudinal thread, preferably between 25% and 175%.

[0008] The inventors have surprisingly discovered that, contrary to popular belief, the hydraulic marking properties of the fabric tape are actually enhanced if the lower longitudinal threads are not arranged at a constant distance from each other. They explain this observation by stating that a significant portion of the hydraulic marking properties is attributable to regular hydraulic diagonal markings, which are noticeably reduced by lower longitudinal threads arranged at irregular intervals.

[0009] It should be noted here that in the present application, whenever the term "distance" between two adjacent threads is used, the average distance is meant. Particularly with SSB forming screens, it can happen that the upper longitudinal threads, in particular, do not run perfectly straight along the length of the fabric, but rather exhibit a kind of wave-like motion to the left and right, i.e., towards the side edges of the fabric. This wave-like motion is caused by the binding threads, which, if they are transverse threads, push the upper longitudinal threads sometimes to the right and sometimes to the left, depending on which side of the upper longitudinal thread they are dipping down on. For this reason, the distance between two upper longitudinal threads – viewed in the length of the fabric – is not always necessarily constant. To account for this circumstance, the present application refers to the "average distance" between two adjacent longitudinal threads.In other words, if the spacing varies along the length of the woven tape, particularly if a wavy line is present, a straight longitudinal thread is assumed to be positioned along the center line of the wavy line. This "average" spacing of the upper longitudinal threads can be adjusted during the manufacturing process of the woven tape. Most often, such tapes are woven flat, heat-set, and then joined into a continuous tape using a splicing machine. In flat weaving, the longitudinal threads correspond to the warp threads, and the transverse threads correspond to the weft threads. The spacing of the warp threads can be adjusted in the reed.

[0010] Just as is generally the case with known woven tapes of this type, it is also preferred here, in order to avoid topographical markings in the fiber web to be produced, for all upper longitudinal threads to have the same cross-sectional shape and the same diameter. The cross-sectional shape is usually circular. However, should it be chosen differently, the diameter of a corresponding circular cross-sectional shape with the same cross-sectional area is to be considered the diameter.

[0011] Furthermore, the upper longitudinal threads preferably have a smaller diameter than the lower longitudinal threads, wherein the diameter of an upper longitudinal thread can be, in particular, 40% to 75% of the diameter of a lower longitudinal thread. For example, the diameter of the upper longitudinal threads can be between 0.07 mm and 0.30 mm and the diameter of the lower longitudinal threads between 0.15 mm and 0.50 mm.

[0012] As already described in the aforementioned documents WO 2013 / 160391 A1 and DE 10 2013 218 465 A1, the weave pattern of the woven tape is preferably repeated in repeats, wherein the upper longitudinal threads and the lower longitudinal threads in each repeat are arranged in several groups, with a first group and a second group and at least one further of the first and / or second group, wherein each first group is formed from an upper longitudinal thread and a lower longitudinal thread arranged below it, and each second group is formed either from two upper longitudinal threads and a lower longitudinal thread arranged below them or from an upper longitudinal thread and two lower longitudinal threads arranged below it.

[0013] Preferably, the fabric tape comprises exclusively first and second groups of longitudinal threads. The upper and lower longitudinal threads in each group are preferably arranged not or only slightly offset from one another when viewed perpendicularly to the fabric layers, so that, with respect to the entire group, a maximum of half the diameter of an upper longitudinal thread is formed laterally between them. The ratio of the number of upper longitudinal threads to the number of lower longitudinal threads is preferably not a whole number. Furthermore, one or more repeating units of first and second groups of longitudinal threads can be present within a single repeat of the fabric tape, each repeating unit consisting of a fixed sequence of first and second groups. Preferably, the group repeat sequence is a maximum of 15.For example, in woven tapes that have fewer upper longitudinal threads than lower longitudinal threads, the following longitudinal thread ratios may exist for corresponding groups: . 3:4 1:1 - 1:2 - 1:1 5:7 1:2 - 1: 1 - 1: 1 - 1:2 7:10 1:2 - 1:2 - 1:2 -1:1 - 1:1 - 1:1 - 1:1 3:5 1:2 - 1:2 - 1:1 5:8 1:2 - 1:2 - 1:2 - 1:1 - 1:1 4:7 1:2 - 1:2 - 1:2 - 1:1

[0014] A first group of longitudinal threads is noted here as 1:1, whereas a second group is noted as 1:2. For woven tapes that have more upper longitudinal threads than lower longitudinal threads, the notation for the second group would be 2:1 instead of 1:2. In the examples above, the overall ratio of upper to lower longitudinal threads would then be reversed accordingly, for example, 4:3 instead of 3:4.

[0015] A first embodiment of the fabric tape according to the invention provides that all second groups are each formed from two upper longitudinal threads and a lower longitudinal thread arranged below them, wherein the two lower longitudinal threads of two immediately adjacent second groups have a first distance to each other, and wherein the two lower longitudinal threads of a first group and a second group immediately adjacent to this first group have a second distance. If a repeating unit consists, for example, of two second groups followed by a first group, the lower longitudinal threads can have a continuously repeating sequence of first (large) distance, second (small) distance, and second (small) distance.

[0016] A second embodiment of the fabric tape according to the invention provides that all second groups are each formed from two upper longitudinal threads and a lower longitudinal thread arranged below them, wherein the two lower longitudinal threads of two immediately adjacent first groups have a distance of the second between them, and wherein the two lower longitudinal threads of a first group and a second group immediately adjacent to this first group have a distance of the first. If a repeating unit consists, for example, of a second group followed by two first groups, the lower longitudinal threads can have a continuously repeating sequence of first or large distance, second or small distance, and first or large distance.

[0017] In both the first and second embodiments of the fabric tape according to the invention, the upper longitudinal threads can also be spaced unevenly from one another. In particular, a minimum distance between the two upper longitudinal threads of a second group can be present. The minimum distance between two immediately adjacent upper longitudinal threads is preferably at least 50% of the diameter of an upper longitudinal thread and / or preferably corresponds to at most to the sum of the diameter of an upper longitudinal thread and the diameter of a lower longitudinal thread.

[0018] A third embodiment of the fabric tape according to the invention provides that all second groups are each formed from an upper longitudinal thread and two lower longitudinal threads arranged below it, wherein the two lower longitudinal threads of a second group have a distance of the second between them, and wherein the two lower longitudinal threads of a first group and a second group immediately adjacent to this first group and / or the two lower longitudinal threads of two immediately adjacent first groups have a distance of the first. If a repeating unit consists, for example, of a first group, followed by a second group and a further first group, the lower longitudinal threads can have a continuously repeating sequence of first or large distance, second or small distance, first or large distance, and first or large distance.

[0019] In the third embodiment according to the invention, the upper longitudinal threads can be arranged such that their average spacings have the following sequence, which is continuously repeated in the transverse direction of the fabric tape: wide spacing, wide spacing, narrow spacing, wherein the difference between an average wide spacing and an average narrow spacing corresponds to at least 60%, preferably at least 120%, of the diameter of an upper longitudinal thread. The inventors have surprisingly discovered that such an uneven spacing of the upper longitudinal threads further reduces the hydraulic diagonal marking property of the fabric tape, which is caused by the lower longitudinal threads.The described uneven spacing of the upper longitudinal threads results in a very fine topographic marking of the fiber web being produced, which extends in the machine direction of the woven tape and thus interrupts or masks the hydraulic diagonal marking. As a result, the described measures of varying the spacing of both the lower and upper longitudinal threads work synergistically, leading to an extremely low hydraulic diagonal marking effect on the woven tape.

[0020] However, it is generally advantageous if the spacing differences of the upper longitudinal threads are not too large, so that the resulting topographical markings in the machine direction of the woven tape do not become too noticeable. The uneven spacing of the lower longitudinal threads allows for targeted control of the spacing of the upper longitudinal threads. In particular, it can be provided that the difference between a maximum distance and a minimum distance between two immediately adjacent upper longitudinal threads is a maximum of 250%, preferably a maximum of 200%, of the diameter of an upper longitudinal thread.

[0021] Preferably, the upper and lower layers of fabric are connected by pairs of binding threads. These binding threads can extend transversely across the fabric band. Furthermore, the two binding threads of each pair can be interwoven with the upper and lower longitudinal threads, and can cross each other when switching from interweaving with the upper longitudinal threads to interweaving with the lower longitudinal threads and vice versa, forming intersections.

[0022] Furthermore, the upper tissue layer is preferably formed by interweaving the upper longitudinal threads with the upper transverse threads and the binding threads, while the lower tissue layer is formed by interweaving the lower longitudinal threads with the lower transverse threads. This means that the binding threads are an integral part of the upper tissue layer and do not contribute to the lower tissue layer, but merely connect it to the upper tissue layer.

[0023] According to a preferred embodiment of the invention, the weave pattern of the upper fabric layer forms a plain weave. This weave is particularly uniform with the smallest possible repeat unit. Unlike other weaves, it is especially free of diagonal ridges. Thus, with a plain weave of the upper fabric layer, there is no reinforcement of the hydraulic diagonal marking for which the lower fabric layer is responsible. A diagonal marking is a marking in the diagonal direction of the fabric. It can be caused, in particular, by diagonally running ridges.

[0024] It should be noted in general that woven tapes, especially when used as forming screens, are usually flat woven, meaning that the longitudinal threads correspond to the warp threads and the transverse threads to the weft threads during the tape manufacturing process. The spacing of the longitudinal threads relative to each other can be relatively easily adjusted during tape production by making appropriate adjustments to the warp beam and the reed of the loom. The term "longitudinal thread" refers to a thread that extends essentially lengthwise along the warp, i.e., in the direction in which the warp moves within the machine during normal use. The term "transverse thread" accordingly refers to a thread that extends essentially crosswise along the warp, i.e., perpendicular to the longitudinal direction.

[0025] Further advantageous features of the invention are explained using exemplary embodiments with reference to the following drawings. These depict: Fig. 1 a schematic representation of a first embodiment of a fabric tape according to the invention, Fig. 2 a schematic representation of a second embodiment of a fabric tape according to the invention and Fig. 3 a schematic representation of a third embodiment of a fabric tape according to the invention.

[0026] Figure 1Figure 1 schematically shows a first embodiment of a woven tape according to the invention. Only the upper longitudinal threads 01-05 and the lower longitudinal threads U1-U3, which together form a repeating unit WE, are visible. However, the upper transverse threads, which are interwoven with the upper longitudinal threads 01-05 to form an upper layer of fabric, the lower transverse threads, which are interwoven with the lower longitudinal threads U1-U3 to form a lower layer of fabric, and the binding threads, which connect the upper and lower layers of fabric, are not shown. The binding threads are preferably an integral part of the weave pattern, in particular a plain weave, of the upper layer of fabric, whereas they do not contribute to the weave pattern of the lower layer.

[0027] The woven tape is composed of repeats in the longitudinal and transverse directions. With regard to the upper longitudinal threads 01-05 and the lower longitudinal threads U1-U3, a repeat can, in principle, consist of exactly one repeating unit WE. However, a repeat often comprises several such repeating units WE. It should be noted that a repeat is defined not only by the longitudinal threads but also by the transverse threads and binding threads. If the upper layer of fabric is a plain weave, which is preferable, a repeat must have an even number of upper longitudinal threads. Since the repeating unit WE in the first embodiment according to Figure 1 If the pattern has five upper longitudinal threads 01-05, the repeat must comprise an integer multiple of the repetition units WE, i.e., at least two repetition units WE.

[0028] In the present first embodiment, a repeating unit WE is formed from three groups of longitudinal threads, namely a second group II, comprising two upper longitudinal threads O1 and O2 and one lower longitudinal thread U1, a further second group II, comprising two upper longitudinal threads O3 and O4 and one lower longitudinal thread U2, and a first group I,comprising only an upper longitudinal thread O5 and a lower longitudinal thread U3. Between the first lower longitudinal thread U1 and the second lower longitudinal thread U2, there is a first, relatively large gap A1, whereas between the second lower longitudinal thread U2 and the third lower longitudinal thread U3, there is a second, relatively small gap A2. The same second, relatively small gap A2 is also located between the third lower longitudinal thread U3 and a first lower longitudinal thread U1 of an immediately adjacent repeating unit. Thus, in this embodiment, the spacing of the lower longitudinal threads results in a continuously repeating sequence in the transverse direction of the fabric tape: first gap, second gap, second gap.

[0029] In this embodiment according to Figure 1The upper longitudinal threads O1-O5 of the repeating unit WE are also unevenly spaced. The two upper longitudinal threads O1-O2 and O3-O4, each belonging to a second group II, have a relatively small distance a3 between them. The distance a1 between the upper longitudinal thread O5, belonging to the first group I, and an immediately adjacent upper longitudinal thread O4 or O1 of a second group II is larger. The distance a2 between the two immediately adjacent upper longitudinal threads O2 and O3 of the two second groups II is smaller than the distance a1, but larger than the distance a3.

[0030] In this embodiment, all upper longitudinal threads 01-05 have the same circular cross-section relative to each other, and all lower longitudinal threads U1-U3 have the same circular cross-section relative to each other, which, however, is larger.

[0031] For example, the dimensions in this embodiment can be chosen as follows: Diameter of upper longitudinal threads O1-O5: 0.10mm Diameter of lower longitudinal threads U1-U3: 0.21mm first distance A1: 0.28mm second distance A2: 0.20mm Distance a1: 0.20mm Distance a2: 0.15mm Distance a3: 0.13mm

[0032] This results in a repeating unit WE extension of 1.31 mm. The difference between the first distance A1 and the second distance A2 is 0.08 mm, which corresponds to 80% of the diameter of the upper longitudinal threads.

[0033] It should also be noted that the spacing, particularly the spacing a1-a3 between the upper longitudinal threads 01-05, does not have to be constant along the entire length of the fabric band. These spacings can vary in width and narrowness. Therefore, the respective average spacing should be used, as described above.

[0034] Figure 2Figure 1 schematically shows a second embodiment of a woven tape according to the invention. Again, only the upper longitudinal threads 01-04 and the lower longitudinal threads U1-U3, which together form a repeating unit WE, are visible. However, the upper transverse threads, which are interwoven with the upper longitudinal threads 01-04 to form an upper layer of fabric, the lower transverse threads, which are interwoven with the lower longitudinal threads U1-U3 to form a lower layer of fabric, and the binding threads, which connect the upper and lower layers of fabric, are not shown. The binding threads are preferably an integral part of the weave pattern, in particular a plain weave, of the upper layer of fabric, whereas they do not contribute to the weave pattern of the lower layer.

[0035] In the present second embodiment, a repeating unit WE is formed from three groups of longitudinal threads, namely a second group II comprising two upper longitudinal threads O1 and O2 and a lower longitudinal thread U1, a first group I, comprising an upper longitudinal thread O3 and a lower longitudinal thread U2, and a further first group I,comprising an upper longitudinal thread O4 and a lower longitudinal thread U3. Between the first lower longitudinal thread U1 and the second lower longitudinal thread U2, there is a first, relatively large gap A1, whereas between the second lower longitudinal thread U2 and the third lower longitudinal thread U3, there is a second, relatively small gap A2. The first, relatively wide gap A1 is also located between the third lower longitudinal thread U3 and a first lower longitudinal thread U1 of an immediately adjacent repeating unit. Thus, in this embodiment, the spacing of the lower longitudinal threads results in a continuously repeating sequence in the transverse direction of the fabric tape: first gap, second gap, first gap.

[0036] In this embodiment according to Figure 2The upper longitudinal threads O1-O4 of the repeating unit WE are also unevenly spaced. The two upper longitudinal threads O1-O2 belonging to the second group II have a relatively small distance a3 between them. The distance a1 between the upper longitudinal thread O3, belonging to the first group I, and the upper longitudinal thread O4, belonging to the other first group I, is larger. The distance a2 between the upper longitudinal thread O2 of the second group II and the immediately adjacent upper longitudinal thread O3 of the first group I lies between the distances a1 and a3.

[0037] In this embodiment, all upper longitudinal threads 01-04 again have the same circular cross-section relative to each other, and all lower longitudinal threads U1-U3 have the same circular cross-section relative to each other, which, however, is larger.

[0038] For example, the dimensions in this embodiment can be chosen as follows: Diameter of upper longitudinal threads O1-O4: 0.10mm Diameter of lower longitudinal threads U1-U3: 0.21mm first distance A1: 0.22mm second distance A2: 0.17mm Distance a1: 0.27mm Distance a2: 0.22mm Distance a3: 0.13mm

[0039] This results in a repeating unit WE extension of 1.24 mm. The difference between the first distance A1 and the second distance A2 is 0.05 mm, which corresponds to 50% of the diameter of the upper longitudinal threads.

[0040] It should also be noted that the spacing, particularly the spacing a1-a3 between the upper longitudinal threads 01-04, does not have to be constant along the entire length of the fabric strip. These spacings can vary in width and narrowness. Therefore, one should again refer to the respective average spacing.

[0041] Figure 3Figure 1 schematically shows a third embodiment of a woven tape according to the invention. Only the upper longitudinal threads 01-03 and the lower longitudinal threads U1-U4, which together form a repeating unit WE, are visible. However, the upper transverse threads, which are interwoven with the upper longitudinal threads 01-03 to form an upper layer of fabric, the lower transverse threads, which are interwoven with the lower longitudinal threads U1-U4 to form a lower layer of fabric, and the binding threads, which connect the upper and lower layers of fabric, are not shown. The binding threads are preferably an integral part of the weave pattern, in particular a plain weave, of the upper layer of fabric, whereas they do not contribute to the weave pattern of the lower layer.

[0042] In the present third embodiment, a repeating unit WE is formed from three groups of longitudinal threads: a first group I comprising an upper longitudinal thread O1 and a lower longitudinal thread U1; a second group II comprising an upper longitudinal thread O2 and two lower longitudinal threads U2 and U3; and a further first group I comprising an upper longitudinal thread O3 and a lower longitudinal thread U4. A first, relatively large gap A1 is located between the first lower longitudinal thread U1 and the second lower longitudinal thread U2, as is the case between the third lower longitudinal thread U3 and the fourth lower longitudinal thread U4, whereas a second, relatively small gap A2 is located between the second lower longitudinal thread U2 and the third lower longitudinal thread U3. The first, relatively wide gap A1 is also located between the fourth lower longitudinal thread U4 and a first lower longitudinal thread U1 of an immediately adjacent repeating unit.Thus, in this embodiment, the spacing of the lower longitudinal threads results in a continuously repeating sequence in the transverse direction of the fabric strip of first spacing, second spacing, first spacing, first spacing.

[0043] In this embodiment according to Figure 3The upper longitudinal threads O1-O3 of the repeating unit WE are also spaced unevenly apart. The upper longitudinal thread O3 has a relatively small distance a2 to the immediately adjacent upper longitudinal thread O1 of the next repeating unit. The distance a1 is larger between the upper longitudinal thread O1, which belongs to the first group I, and the upper longitudinal thread O2, which belongs to the second group II. The same distance a1 also exists between the upper longitudinal thread O2, which belongs to the second group II, and the upper longitudinal thread O3, which belongs to the other first group I. Thus, in this third embodiment, the following sequence of distances for the upper longitudinal threads, which repeats continuously in the transverse direction, results: large distance, large distance, small distance.

[0044] In this embodiment, all upper longitudinal threads 01-03 again have the same circular cross-section relative to each other, and all lower longitudinal threads U1-U4 have the same circular cross-section relative to each other, which, however, is larger.

[0045] For example, the dimensions in this embodiment can be chosen as follows: Diameter of upper longitudinal threads O1-O4: 0.14mm Diameter of lower longitudinal threads U1-U3: 0.19mm first distance A1: 0.095mm first distance A2: 0.049mm Distance a1: 0.2645mm Distance a2: 0.145mm

[0046] This results in a repeating unit (WE) extension of 1.094 mm. The difference between the first distance A1 and the second distance A2 is 0.046 mm, which corresponds to 33% of the diameter of the upper longitudinal threads.

[0047] It should also be noted that the spacing, particularly the distances a1 and a2 between the upper longitudinal threads 01-03, does not have to be constant along the entire length of the fabric strip. These distances can vary in size. Therefore, the average spacing should be considered.

Claims

1. Fabric tape, in particular forming screen, for a machine for producing and / or processing a fibrous web comprising an upper fabric layer with upper longitudinal threads (01-05) and with upper transverse threads interwoven with the latter, and a lower fabric layer with lower longitudinal threads (U1-U4) and with lower transverse threads interwoven with the latter, wherein the two fabric layers are disposed on top of one another in such a manner that, in the intended use of the fabric tape, the upper fabric layer faces the fibrous web to be produced, and the lower fabric layer faces away from the fibrous web to be produced, characterized in that a first spacing (A1) between two directly adjacent lower longitudinal threads (U1-U4) is greater than a second spacing (A2) between two directly adjacent lower longitudinal threads (U1-U4), wherein the difference between the first spacing (A1) and the second spacing (A2) is between 20% and 175% of a diameter of an upper longitudinal thread (01-05), preferably between 25% and 175%.

2. Fabric tape according to Claim 1, characterized in that the weaving pattern of the fabric tape repeats itself in repeats, wherein the upper longitudinal threads (01-05) and the lower longitudinal threads (U1-U4) are disposed in a plurality of groups in each repeat, with a first group (I) and a second group (II) and at least another of first and / or second group (I, II), wherein each first group (I) is formed from an upper longitudinal thread (01-05) and disposed therebelow one lower longitudinal thread (U1-U4), and each second group (II) is formed either from two upper longitudinal threads (01-05) and disposed therebelow one lower longitudinal thread (U1-U4), or from one upper longitudinal thread (01-05) and disposed therebelow two lower longitudinal threads (U1-U4).

3. Fabric tape according to Claim 2, characterized in that all second groups (II) are each formed from two upper longitudinal threads (01-05) and disposed therebelow one lower longitudinal thread (U1-U4), wherein the two lower longitudinal threads (U1-U4) of two directly adjacent second groups (II) have the mutual first spacing (A1), and wherein the two lower longitudinal threads (U1-U4) of a first group (I) and of a second group (II) directly adjacent to this first group (I) have the second spacing (A2).

4. Fabric tape according to Claim 2, characterized in that all second groups (II) are each formed of two upper longitudinal threads (01-05) and disposed therebelow one lower longitudinal thread (U1-U4), wherein the two lower longitudinal threads (U1-U4) of two directly adjacent first groups (I) have the mutual second spacing (A2), and wherein the two lower longitudinal threads (U1-U4) of a first group (I) and of a second group (II) directly adjacent to this first group (I) have the first spacing (A1).

5. Fabric tape according to Claim 3 or 4, characterized in that a minimum spacing (a3) of upper longitudinal threads (01-05) is present between the two upper longitudinal threads (01-05) of a second group (II).

6. Fabric tape according to one of Claims 3 to 5, characterized in that a minimum spacing (a3) between two directly adjacent upper longitudinal threads (01-05) is at least 50% of the diameter of an upper longitudinal thread (01-05), and / or corresponds to a maximum of the sum of the diameter of an upper longitudinal thread (O1-05) and the diameter of a lower longitudinal thread (U1-U4).

7. Fabric tape according to Claim 2, characterized in that all second groups (II) are each formed from an upper longitudinal thread (01-05) and disposed therebelow two lower longitudinal threads (U1-U4), wherein the two lower longitudinal threads (U1-U4) of a second group (II) have the mutual second spacing (A2), and wherein the two lower longitudinal threads (U1-U4) of a first group (I) and of a second group (II) directly adjacent to this first group (I), and / or the two lower longitudinal threads (U1-U4) of two directly adjacent first groups (I), have the first spacing (A1).

8. Fabric tape according to Claim 7, characterized in that the upper longitudinal threads (O1-05) are disposed in such a manner that their average spacings have the following sequence, which is repeated continuously in the transverse direction of the fabric tape: wide spacing (a1), wide spacing (a1), narrow spacing (a2), wherein the difference between an average wide spacing (a1) and an average narrow spacing (a2) corresponds to at least 60%, preferably at least 120%, of a diameter of an upper longitudinal thread (01-05).

9. Fabric tape according to one of the preceding claims, characterized in that the difference between a maximum spacing (a1) of two directly adjacent upper longitudinal threads (01-05) and a minimum spacing (a2; a3) of two directly adjacent upper longitudinal threads (01-05) is a maximum of 200%, preferably a maximum of 150%, of a diameter of an upper longitudinal thread (01-05).

10. Fabric tape according to one of the preceding claims, characterized in that the upper and the lower fabric layer are connected to one another by pairs of binding threads.

11. Fabric tape according to Claim 10, characterized in that the binding threads extend in the transverse direction of the fabric tape.

12. Fabric tape according to Claim 10 or 11, characterized in that the two binding threads of the respective pair of binding threads are interwoven so as to mutually alternate with upper and lower longitudinal threads, and intersect one another when changing from interweaving with upper longitudinal threads to interweaving with lower longitudinal threads, and vice versa, while forming intersection points.

13. Fabric tape according to Claim 12, if referring back to Claim 2, characterized in that each pair of binding threads provides at least two intersection points in the repeat.

14. Fabric tape according to one of Claims 10 to 13, characterized in that the upper fabric layer is formed by interweaving the upper longitudinal threads with the upper transverse threads and the binding threads, and the lower fabric layer is formed by interweaving the lower longitudinal threads with the lower transverse threads.

15. Fabric tape according to one of the preceding claims, characterized in that the upper fabric layer forms a plain weave.