Industrial fabric

Description

[0001] The invention relates to an industrial fabric, more particularly, to an industrial fabric for use in construction spots.

[0002] Geotextile clothes are usually used in construction and irrigation fields, especially for repairing constructions after natural disasters, and are very much appreciated in the engineering sector. Since the environment for using the geotextile clothes is usually encountered in tough conditions, such as, in many occasions, soil with very big humidity is involved. As such, it is often required that the geotextile clothes must have characteristics of excellent capability of anti-hydrolysis, good mechanical adaptability for humidity, good water permeability, etc.

[0003] Referring to Figures 1 and 2, a conventional geotextile cloth 1 includes a plurality of warp yarns 11 and a plurality of weft yarns 12. During plain weaving the geotextile cloth 1, each weft yarn 12 crosses the warp yarns 11 by going over one, then under the next and so on. The plain weaving method provides a high strength and firm structure for the geotextile cloth 1, and is the most commonly used weaving method.

[0004] However, since the geotextile cloth 1 must fulfill the requirement of high strength and good water permeability, the number of monofilaments for each yarn, or the strength or air holes in each yarn is a key factor that determines whether the geotextile cloth 1 is sufficient to permeate water and to block soil and other debris. Due to the restriction of the weaving method implemented by orthogonal weaving of the warp yarns 11 and the weft yarns 12, the density of the plain weave of the geotextile cloth 1 can be too high to permeate water, or too low to achieve a sufficient strength.

[0005] Referring to Figures 3 and 4, another conventional geotextile cloth 2 includes a plurality of split film yarns 21 woven along warp and weft directions by plain weaving or twill weaving. Each of the split film yarns 21 is made by splitting a film into a plurality of interconnected monofilaments 211, which are then subjected to a twisting process.

[0006] However, the split film monofilaments 211 are flat and the strength thereof is lower than that of the monofilaments shown in Figure 1. Compared to the geotextile cloth 1 with the same strength, the split film yarn geotextile cloth 2 is heavier, and requires more material for fabrication and more labor for installation.

[0007] JP Patent Application Publication No. 2002337471 discloses a screen gauze of which the warp and the wood are constituted of monofilaments respectively, wherein at least the warp and/or the woof of the monofilaments constituting the screen gauge has the shape of a multifoliate cross section and the number of leaves is three to ten. The screen gauze is a plain weave or twill having 100 meshes/cm (255 meshes/inch), preferably more than 19.7 meshes/cm (50 mesh/inch), especially preferably at 51 meshes/cm (130 meshes/inch). The monofilament fineness of the screen gauze ranges from 5 dtex to 110 dtex, preferably from 20 dtex to 45 dtex.

[0008] US Patent No. 6171984 discloses a conventional geosynthetic material exhibiting less strain under an initial tensile load than presently available geosynthetic materials. The conventional geosynthetic material includes a first plurality of spaced-apart generally parallel fiber strands, a second plurality of spaced-apart generally parallel fiber strands positioned adjacent to and forming a plurality of intersections with at least a portion of the first plurality of strands, an organic tying member fixedly connecting portions of fiber strands of the first plurality of fiber strands with intersecting corresponding portions of the second plurality of fiber strands, and a bonding agent adhering predetermined regions of selected fiber strands of the first plurality of fiber strands with predetermined regions of selected fiber strands of the second plurality of fiber strands, wherein at least a portion of the fiber strands selected from the group consisting of the first plurality of fiber strands, the second plurality of fiber strands and combinations thereof comprise glass fibers.

[0009] US Patent No. 5108224 discloses a woven silt control fabric comprising substantially flat yarns woven with substantially round monofilament yarns, wherein the flat yarns are compacted, and the fabric is capable of high water flow capacity while achieving high soil retention. Preferably, the flat and monofilament yarns are made from substantially polypropylene and the flat yarns are compacted to about one hundred to about one hundred twenty percent coverage.

[0010] European Patent No. 1595986 discloses a fabric consisting of a polymer coating layer reinforced by a weave of multifilament weft and monofilament warp filaments made from high-strength polymer, glass or wire.

[0011] An object of the present invention is to provide an industrial fabric that has good strength and good water permeability.

[0012] This object is achieved by an industrial fabric according to claim 1.

[0013] Accordingly, the invention provides an industrial fabric which includes a plurality of yarns made of polymers and extending in warp and weft directions and woven into a twill weave structure. The yarns include a plurality of multifilament yarns each of which has a plurality of monofilament fibers. Each of the multifilament yarns has a plurality of monofilament fibers. The twill weave structure includes 7.87 to 78.7 monofilament fibers per mm (i.e., 200 to 2000 monofilament fibers per inch) in either one of the warp and weft directions. A degree of fineness of each of the monofilament fibers ranges from 5.56 tex to 55.6 tex (i.e., 50 deniers to 500 deniers).

[0014] Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment with reference to the accompanying drawings, of which:

Fig. 1 is a plan view of a conventional geotextile cloth;

Fig. 2 is a side sectional view of the conventional geotextile cloth in Figure 1;

Fig. 3 is a plan view of another conventional geotextile cloth;

Fig. 4 is a side sectional view of the conventional geotextile cloth in Figure 3;

Fig. 5 is a plan view illustrating a first example in the first preferred embodiment of an industrial fabric according to the present invention;

Fig. 6 is a side sectional view of Figure 5 along line 6-6;

Fig. 7 is a side sectional view of Figure 5 along line 7-7;

Fig. 8 is a plan view illustrating a second example of the first preferred embodiment;

Fig. 9 is a side sectional view of Figure 8 taken along line 9-9;

Fig. 10 is a side sectional view of Figure 8 taken along line 10-10;

Fig. 11 is a plan view illustrating a third example of the first preferred embodiment;

Fig. 12 is a side sectional view of Figure 11 taken along line 12-12;

Fig. 13 is a side sectional view of Figure 11 taken along line 13-13;

Fig. 14 is a plan view illustrating a fourth example of the first preferred embodiment;

Fig. 15 is a side sectional view of Figure 14 taken along line 15-15;

Fig. 16 is a side sectional view of Figure 14 a taken long line 16-16;

Fig. 17 is a plan view illustrating a fifth example of the first preferred embodiment;

Fig. 18 is a side sectional view of Figure 17 taken along line 18-18;

Fig. 19 is a side sectional view of Figure 17 taken along line 19-19;

Fig. 20 is a plan view illustrating a sixth example of the first preferred embodiment;

Fig. 21 is a side sectional view of Figure 20 along line 21-21;

Fig. 22 is a side sectional view of Figure 20 along line 22-22;

Fig. 23 is a plan view illustrating a seventh example of the first preferred embodiment;

Fig. 24 is a side sectional view of Figure 23 taken along line 24-24;

Fig. 25 is a side sectional view of Figure 23 taken along line 25-25;

Fig. 26 is a plan view illustrating a first example of the second preferred embodiment;

Fig. 27 is a side sectional view of Figure 26 cut along line 27-27;

Fig. 28 is a side sectional view of Figure 26 cut along line 28-28;

Fig. 29 is a perspective view illustrating a second example of the second preferred embodiment; and Fig. 30 is a side sectional view of Figure 29.

[0015] Before the present invention is described in greater detail with reference to the accompanying preferred embodiment, it should be noted herein that like elements are denoted by the same reference numerals throughout the disclosure.

[0016] Referring to Figures 5 to 7, an industrial fabric 3 according to the preferred embodiment the present invention made from multiple yarns that include a plurality of multifilament yarns 31 and a plurality of monofilament yarns 32.

[0017] The multifilament yarns 31 and the monofilament yarns 32 in this embodiment are made of polymers, such as polypropylene (PP), polyethylene terephthalate (PET), polythene (PE), etc. Each multifilament yarn 31 is made from a plurality of monofilament fibers 311, each of which has a degree of fineness ranging from 5.56 tex to 55.6 tex (i.e., 50 deniers to 500 deniers) . Each monofilament yarn 32 has a single monofilament, and has a degree of fineness ranging from 55.7 tex to 222.2 tex (i.e., 501 deniers to 2000 deniers).

[0018] To weave the industrial fabric 3, the multifilament yarns 31 and the monofilament yarns 32 are arranged along warp and weft directions by twill weaving. A twill weave structure of the yarns 31, 32 may either be a left twill or right twill, and a pattern of one n/1 twill to n/7 twill, where n ranges from 2 and 7, such as, 2/2, 3/2, 4/2, 5/1, 6/1, 3/7,..., etc. Taking the 2/1 twill for example, two warp yarns (multifilament yarn 31 or monofilament yarn 32) cross over one weft yarn (multifilament yarn 31 or monofilament yarn 32). The twill weave structure of the industrial fabric 3 includes 7.87 to 78.7 monofilament fibers per mm (i.e., 200 to 2000 monofilament fibers per inch) in either one of the warp and weft directions, and 0.20 to 2.36 monofilament yarns per mm (i.e., 5 to 60 monofilament yarns 32 per inch) in either one of the warp and weft directions.

[0019] There are seven combinations of the monofilament yarns 32 and the multifilament yarns 31:

1. Referring once again to Figures 5 to 7, the industrial fabric 3 is a 2/1 twill weave, and includes the monofilament yarns 32 along the warp direction and the multifilament yarns 31 along the weft direction.

2. Referring to Figures 8 to 10, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the warp and weft directions and the multifilament yarns 31 along the weft direction.

3. Referring to Figures 11 to 13, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the weft direction and the multifilament yarns 31 along the warp direction.

4. Referring Figures 14 to 16, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the warp and weft directions and the multifilament yarns 31 along the warp direction.

5. Referring to Figures 17 to 19, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the weft direction and the multifilament yarns 31 along the warp and weft directions.

6. As shown again in Figures 20 to 22, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the warp direction and the multifilament yarns 31 along the warp and weft directions.

7. Referring to Figures 23 to 25, the industrial fabric 3 is a 2/1 twill weave, which includes the monofilament yarns 32 along the warp and weft directions and the multifilament yarns 31 along the warp and weft directions.

[0020] Due to the twill weaving used to fabricate the industrial fabric 3, and due to the use of a large amount of the monofilament yarns 32 and/or multifilament yarns 31 and the use of the multifilament yarns 31 including a large number of monofilament fibers 311 to compensate the insufficient strength resulting from the twill weaving, the face side strength of the industrial fabric 3 can reach a strength of 50 kN/m, and the water permeability thereof can amount to 900 litres/m². In comparison with a conventional 25 kN industrial fabric with a water permeability of 111 litres/m², or a conventional 45kN industrial fabric with 270 litres/m², the industrial fabric 3 can increase the water permeability up to 330% - 800%.

[0021] Referring to Figures 26 to 28, the second preferred embodiment is generally identical to the first preferred embodiment, but differs in that the industrial fabric 3 (2/1 twill) includes a plurality of the multifilament yarns 31 along the warp and weft directions. Each of the multifilament yarns 31 includes a plurality of monofilament fibers 311. Each monofilament fiber 311 has a degree of fineness ranging from 5.56 tex to 55.6 tex (i.e., 50 deniers to 500 deniers). The industrial fabric 3 includes 7.87 to 78.7 monofilament fibers per mm (i.e., 200 to 2000 monofilament fibers per inch) in either one of the warp and weft directions.

[0022] Referring to Figures 29 and 30, the industrial fabric 3 according to a third preferred embodiment is a 3/1 twill weave which includes a plurality of the multifilament yarns 31 along the warp and weft directions.

Claims

1. An industrial fabric (3) including
a plurality of yarns (31, 32) made of polymers and extending in warp and weft directions and woven into a twill weave structure, characterized in that said yarns (31) include a plurality of multifilament yarns (31), each of said multifilament yarns (31) having a plurality of monofilament fibers (311), said twill weave structure including 7.87 to 78.7 monofilament fibers (311) per mm (200 to 2000 per inch) measured in either one of the warp and weft directions, a degree of fineness of each of said monofilament fibers ranging from 5.56 tex to 55. 6 tex (50 deniers to 500 deniers).

2. The industrial fabric (3) as claimed in Claim 1, wherein said yarns further includes a plurality of monofilament yarns (32), each of said monofilament yarns (32) having a single monofilament.

3. The industrial fabric (3) as claimed in Claim 2, wherein said twill weave structure includes 0.20-2.36 monofilament yarns (32) per mm (5 to 60 per inch) measured in either one of the warp and weft directions, a degree of fineness of each of said monofilament yarns (32) ranging from 55.7 t e x to 222.2 tex (501 deniers to 2000 deniers).

4. The industrial fabric as claimed in Claim 3, wherein said multifilament yarns (31) are arranged along the warp direction, and said monofilament yarns (32) are arranged in one of, or both of the weft and warp directions.

5. The industrial fabric as claimed in Claim 3, wherein said multifilament yarns (31) are arranged along the weft direction, and said monofilament yarns (32) are arranged along one of, or both of the weft and warp directions.

6. The industrial fabric as claimed in Claim 3, wherein said monofilament yarns (32) are arranged along the warp direction, and said multifilament yarns (31) are arranged along both of the weft and warp directions.

7. The industrial fabric as claimed in Claim 3, wherein said monofilament yarns (32) are arranged along the weft direction, and said multifilament yarns (31) are arranged along both of the weft and warp directions.

8. The industrial fabric as claimed in Claim 3, wherein said monofilament yarns (32) are arranged along both of the weft and warp directions, and said multifilament yarns (31) are arranged along both of the weft and warp directions.

9. The industrial fabric as claimed in Claim 1, wherein said yarns (31) include a plurality of said multifilament yarns (31) in both of the warp and weft directions.

10. The industrial fabric as claimed in any one of Claims 1 to 8, wherein said twill weave structure has a pattern of one of n/1 twill to n/7 twill, where n ranges from 2 to 7.

Ansprüche

1. Ein Industriegewebe (3), das folgende Merkmale umfasst:

eine Mehrzahl von Garnen (31, 32), die aus Polymeren hergestellt sind und sich in Kett- und Schussrichtung erstrecken und in eine Körperbindungsstruktur gewebt sind, dadurch gekennzeichnet, dass die Garne (31) eine Mehrzahl von Multifilamentgarnen (31) umfassen, wobei jedes der Multifilamentgarne (31) eine Mehrzahl von Monofilamentfasern (311) aufweist, wobei die Körperbindungsstruktur 7,87 bis 78,7 Monofilamentfasern (311) pro mm (200 bis 2000 pro Zoll) umfasst, gemessen in entweder der Kett- oder der Schussrichtung, wobei ein Feinheitsgrad von jeder der Monofilamentfasern von 5,56 Tex bis 55,6 Tex (50 Denier bis 500 Denier) reicht.

2. Das Industriegewebe (3) gemäß Anspruch 1, bei dem die Garne ferner eine Mehrzahl von Monofilamentgarnen (32) umfassen, wobei jedes der Monofilamentgarne (32) ein einziges Monofilament aufweist.

3. Das Industriegewebe (3) gemäß Anspruch 2, bei dem die Körperbindungsstruktur 0,20 bis 2,36 Monofilamentgarne (32) pro mm (5 bis 60 pro Zoll) umfasst, gemessen in entweder der Kett- oder der Schussrichtung, wobei ein Feinheitsgrad von jedem der Monofilamentgarne (32) von 55,7 Tex bis 222,2 Tex (501 Denier bis 2000 Denier) reicht.

4. Das Industriegewebe gemäß Anspruch 3, bei dem die Multifilamentgarne (31) entlang der Kettrichtung angeordnet sind, und die Monofilamentgarne (32) in einer oder beiden der Schuss- und Kettrichtung angeordnet sind.

5. Das Industriegewebe gemäß Anspruch 3, bei dem die Multifilamentgarne (31) entlang der Schussrichtung angeordnet sind, und die Monofilamentgarne (32) entlang einer oder beiden der Schuss- und Kettrichtung angeordnet sind.

6. Das Industriegewebe gemäß Anspruch 3, bei dem die Monofilamentgarne (32) entlang der Kettrichtung angeordnet sind, und die Multifilamentgarne (31) entlang sowohl der Schuss- als auch der Kettrichtung angeordnet sind.

7. Das Industriegewebe gemäß Anspruch 3, bei dem die Monofilamentgarne (32) entlang der Schussrichtung angeordnet sind, und die Multifilamentgarne (31) entlang sowohl der Schuss- als auch der Kettrichtung angeordnet sind.

8. Das Industriegewebe gemäß Anspruch 3, bei dem die Monofilamentgarne (32) entlang sowohl der Schuss- als auch der Kettrichtung angeordnet sind, und die Multifilamentgarne (31) entlang sowohl der Schuss- als auch der Kettrichtung angeordnet sind.

9. Das Industriegewebe gemäß Anspruch 1, bei dem die Garne (31) eine Mehrzahl der Multifilamentgarne (31) in sowohl der Kett- als auch der Schussrichtung umfassen.

10. Das Industriegewebe gemäß einem der Ansprüche 1 bis 8, bei dem die Körperbindungsstruktur ein Muster von einem von n/1 Twill bis n/7 Twill aufweist, wobei n von 2 bis 7 reicht.

Revendications

1. Tissu industriel (3) comprenant
une pluralité de fils (31, 32) réalisés en polymères et s'étendant dans les sens de chaîne et de trame et tissés de manière à obtenir une structure d'armure sergée, caractérisé par le fait que lesdits fils (31) comportent une pluralité de fils multi-filament (31), chacun desdits fils multi-filament (31) présentant une pluralité de fibres mono-filament (311), ladite structure d'armure sergée comportant de 7,87 à 78,7 fibres mono-filament (311) par mm (de 200 à 2000 par pouce) mesurés dans l'un ou l'autre des sens de chaîne et de trame, un degré de finesse de chacun desdits fils mono-filament allant de 5,56 tex à 55,6 tex (de 50 deniers à 500 deniers).

2. Tissu industriel (3) selon la revendication 1, dans lequel lesdits fils comportent par ailleurs une pluralité de fils mono-filament (32), chacun desdits fils mono-filament (32) présentant un seul mono-filament.

3. Tissu industriel (3) selon la revendication 2, dans lequel la structure d'armure sergée comporte de 0,20 à 2,36 fils mono-filament (32) par mm (de 5 à 60 par pouce), mesurés dans l'un ou l'autre des sens de chaîne et de trame, un degré de finesse de chacun desdits fils mono-filament (32) variant de 55,7 tex à 222,2 tex (501 deniers à 2000 deniers).

4. Tissu industriel selon la revendication 3, dans lequel lesdits fils multi-filament (31) sont disposés dans le sens de chaîne et lesdits fils mono-filament (32) sont disposés dans l'un, ou l'un et l'autre, des sens de trame et de chaîne.

5. Tissu industriel selon la revendication 3, dans lequel lesdits fils multi-filament (31) sont disposés dans le sens de trame, et lesdits fils mono-filament (32) sont disposés dans l'un, ou l'un et l'autre, des sens de trame et de chaîne.

6. Tissu industriel selon la revendication 3, dans lequel lesdits fils mono-filament (32) sont disposés dans le sens de chaîne, et lesdits fils multi-filament (31) sont disposés dans l'un et l'autre des sens de trame et de chaîne.

7. Tissu industriel selon la revendication 3, dans lequel lesdits fils mono-filament (32) sont disposés dans le sens de trame, et lesdits fils multi-filament (31) sont disposés dans l'un et l'autre des sens de trame et de chaîne.

8. Tissu industriel selon la revendication 3, dans lequel lesdits fils mono-filament (32) sont disposés dans l'un et l'autre des sens de trame et de chaîne, et lesdits fils multi-filament (31) sont disposés dans l'un et l'autre des sens de trame et de chaîne.

9. Tissu industriel selon la revendication 1, dans lequel lesdits fils (31) comportent une pluralité desdits fils multi-filament (31) dans l'un et l'autre des sens de chaîne et de trame.

10. Tissu industriel selon l'une quelconque des revendications 1 à 8, dans lequel ladite structure d'armure sergée présente un motif de l'un parmi de n/1 sergé à n/7 sergé, où n varie de 2 à 7.

Drawing