EP1240372B1 - Mesh fabric - Google Patents

Abstract

The invention relatrs to a wide-meshed fabric (1) treated with bonding agents. The inventive mesh is made up of bundles (4) consisting of several warop threads (3) and bundloes (6) consisting of several weft threads (5) surrounding the inner meshes (7). The warp threads (3) are interwoven with the weft threads (5) at intersection points (5) of the bundles (4) of warp threads and bundles (6) of weft threads (5) running at right-angles to each other. In order to firmly secure the warp threads and the weft threads, the bundles (4) of warp threads are divided into a first group (4') of warp threads and a second group (4'') of warp threads and the first group of warp threads crosses over the second group of warp threads threads belonging to the same bundle (4) of warp threads for each mesh (7) thereby forming a half-twist. Similarly, the warp threads (3) of both groups (4', 4'') of warp threads are interwoven with the weft threads (5), running substantially parallel to each other. Mesh fabrics of the a<bove-mentioned kind can be used to reinforce ground surfaces, road surfaces, layers of mortar and the like, in addition to use in poultry farming and use as fishing nets.

Description

The invention relates to a wide-meshed, treated with adhesives Mesh fabric according to the preamble of claim 1.

Lattice fabrics of this type, in particular for the reinforcement of bitumen-bound Road surfaces, or for reinforcement cement or plaster bound Mortar layers, plasters or the like or as geogrids for reinforcement of soils are known from the German published documents 20 00 937; 31 20 661; 31 36 026 and 41 23 055. Like the DE-OS 195 30 541 shows, these meshes are also used as floor grilles for the Rearing chickens used. These grids can also be used as fishing nets be used.

The warp threads and the weft threads are preferably made of multifilaments Synthetic yarns with high tensile strength, especially made of aramid, polyester or like. Glass filament yarns can also be used.

As an adhesive, which the warp bundles, the weft bundles and their crossing points enveloped and thus fixed the mesh and against protects chemical and mechanical stress, depending on the Intended use a PVC plastisol, a latex dispersion or dispersions made of bitumen, acrylates or corresponding soft plastics as well Mixtures of these.

Wide-mesh mesh fabrics are included before impregnation or wrapping an adhesive very loose, so that the warp threads and the weft threads can be moved slightly unless special measures are taken become. The interweaving of the warp threads with the weft threads is not enough to to achieve sufficient stability of a wide-mesh grid fabric. So that the warp threads of a warp thread bundle and also the weft threads of a Weft bundles are held together in the known mesh fabrics each warp thread bundle is assigned at least one thin leno thread, the zigzag over the parallel warp threads of one Warp thread bundle is guided and on the sides of the warp thread bundle each runs under a weft bundle. These leno threads that work as a half-turn or can be trained as a full turn, have only the task to for impregnating and / or covering the mesh fabric with an adhesive the warps of the warp bundles and the wefts of the weft bundles together.

Lattice fabrics are known from US Pat. No. 5,965,467, in which the adjacent warp threads of a warp thread bundle in two groups are divided. In a first embodiment according to FIGS. 1 and 2 of U.S. Patent 5,965,467 becomes a group of the odd threads and the other group is formed from the even threads. Every thread one group crosses a neighboring thread of the other group on the Crossing point between warp and weft bundle twice, namely once at the beginning of the crossing point in the area of the first weft and once at the end of this crossing point in the area of the last weft. In the embodiment according to FIG. 3 of this document cross only the two outer pairs of adjacent weft threads at the beginning and at the end of each intersection. In these two embodiments the warp threads run in the area between two weft bundles parallel to each other and do not cross.

Cross this publication in the embodiments according to FIGS. 3a and 3b only the two outer pairs of adjacent warp threads between two weft bundles. The other warp threads run between two weft bundles parallel to each other and cross each other Not. In the embodiment according to FIG. 3b the additionally cross neighboring single warp threads of the two outer warp thread pairs as well between the individual weft threads in the area of the crossing point between Warp and weft bundles. Figures 4 and 5 of this document show finally one or two simple leno threads between two crossing points the warp and weft bundle once all Cross the warp threads of a warp thread bundle that run parallel to each other.

The invention has for its object to provide a mesh which the weaving fixation achieved is stronger than with the known ones Lattice fabrics and in which the warp threads are held closer together Warp thread bundles stronger interlocking with the floor to be reinforced or the layer to be reinforced is reached.

This object is achieved by the features of the characterizing Part of claim 1 in conjunction with the features of his General term solved.

The fact that a group of warp threads of a warp thread bundle another group of this bundle per stitch crosses and the load-bearing Warp threads interwoven with the weft threads are, a very stable lattice fabric is produced, in which neither let the warp threads move the weft threads. An additional one Leno thread is not required. It is also achieved that the thickness of the warp bundles is twice as thick as the warp threads and - seen in plan view - the warp thread bundles on average by about 50 % are narrower than with parallel running warp threads. Through this Property as well as the stronger cohesion of the warp thread bundles and weft bundles at the crossing points Geogrids better interlocking with those to be stabilized or floors to be reinforced. Because the light one too This object is achieved in that the warp thread bundle into a first (e.g. left) warp thread group next to each other Warp threads and a second (e.g. right) warp thread group of side by side Warp threads are divided and the first warp thread group the second Warp thread group of the same warp thread bundle per stitch in the manner of one Half-turn crossed.

The fact that a group of warp threads of a warp thread bundle the other Group of this bundle per stitch crosses and the load-bearing warp threads tightly woven together with the weft threads becomes a very stable lattice fabric is produced, in which neither the warp threads nor the Have weft threads shifted. The run at the crossing points Warp threads of both warp thread groups parallel to each other. An additional one Leno thread for stabilization is not necessary. Furthermore, it is achieved that the thickness of the warp bundles is twice as thick as the warp and - seen in plan view - the warp thread bundles on average by approx. 50% are narrower than with warp threads running in parallel. By this property as well as the stronger cohesion of the warp bundles and weft bundles at the intersection there is better interlocking with geogrids achieved with the floors to be stabilized or reinforced. Because the light one too under the warp threads 3 of the second warp thread group 4 "and one second group 6 "of the wefts 5 of a weft bundle 6 under the Warp threads 3 of the first warp thread group 4 'and over the warp threads 3 of the second warp thread group 4 ".

The type of interweaving is particularly evident from the enlarged view shown in Figure 2. From this it can be seen that - counted from below - everyone odd weft 5 over the first warp thread group 4 'and then under the warp thread group 4 "of the warp thread bundle 4 runs during each even weft 5 under the first warp thread group 4 'and then over the second warp thread group 4 "of the warp thread bundle runs.

LIST OF REFERENCE NUMBERS

1

mesh

3

warp

4

Kettfadenbündel

4 '

first warp thread group

4 '

second warp thread group

5

weft

6

Weft bundles

6 '

first group

6 "

second group

7

open stitch

8th

intersection

Claims (3)

1. A wide-mesh grid fabric (1) treated with bonding agents, having

   warp thread bundles (4) comprising a plurality of warp threads (3), and

   weft thread bundles (6) comprising a plurality of weft threads (5),

   wherein

   the warp thread bundles (4) and the weft thread bundles (6) surround open meshes (7) of the grid fabric (1),

   the warp thread bundles (4) are divided into a first warp thread group (4') and a second warp thread group (4") and

   the warp threads (3) of both warp thread groups (4',4") extending essentially parallel to each other are interwoven with the weft threads (5) at the intersections (8) of the warp thread bundles (4) and weft thread bundles (6) extending at a right angle to each other,

   characterised in that
   said two warp thread groups (4',4") cross over the respective other warp thread group (4",4') of a warp thread bundle (4) between two weft thread bundles (6), i.e. for each mesh (7), in the manner of a half-doup thread
2. Grid fabric according to claim 1, characterised in that a first group (6') of the weft threads (5) of a weft thread bundle (6) extends over the warp threads (3) of the first warp thread group (4') and under the warp threads (3) of the second warp thread group (4") and a second group (6") of the weft threads (5) of a weft thread bundle (6) extends under the warp threads (3) of the first warp thread group (4') and over the warp threads (3) of the second warp thread group (4").
3. Grid fabric according to claim 2, characterised in that each odd-numbered weft thread (5) of a weft thread bundle (6) belongs to the first group (6') and each even-numbered weft thread (5) belongs to the second group (6") of the weft threads (5) of a weft thread bundle (6).

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