Geotextile for filtering

Abstract

The utility model provides a geotextile for filtering, which comprises a plurality of warps and a plurality of wefts, the warps and the wefts are interwoven according to a preset twill weave, and the preset twill weave comprises a plurality of first twill weaves and a plurality of second twill weaves. The first twill weaves and the second twill weaves are arranged at intervals in the warp direction. In the warp direction, double-weft structures are arranged at intervals of a first preset distance, and / or in the weft direction, double-warp structures are arranged at intervals of a second preset distance; the utility model has the advantages of good mechanical property and good durability.

Description

Technical Field

[0001] This utility model relates to the field of geotextiles, specifically to a geotextile for filtration. Background Technology

[0002] Geotextile, also known as geotextile fabric, is a permeable geosynthetic material made of synthetic fibers through needle punching or weaving. Existing geotextiles are generally made using ordinary twill or plain weave weave. Geotextiles made using ordinary twill or plain weave weave have larger pore sizes and poorer mechanical properties, which affects their service life.

[0003] Therefore, there is an urgent need to provide a geotextile with good mechanical properties and durability. Utility Model Content

[0004] The purpose of this invention is to provide a geotextile for filtration with good mechanical properties and durability.

[0005] To achieve the above objectives, this utility model provides a geotextile for filtration, comprising multiple warp yarns and multiple weft yarns, which are interwoven according to a preset twill weave structure. The preset twill weave structure includes several first twill weave structures and several second twill weave structures, which are arranged at intervals along the warp direction. In the warp direction, a double weft structure is provided at every first preset distance, and / or, in the weft direction, a double warp structure is provided at every second preset distance.

[0006] As can be seen from the above scheme, by interlacing the warp and weft yarns according to a preset twill weave, the geotextile of this utility model can improve the toughness and impact strength of the geotextile by utilizing this special weaving structure, making it suitable for high-load scenarios and increasing its service life. At the same time, by adding double weft structures and / or double warp structures at preset intervals in the warp and weft directions, the density of the fabric is increased, thereby enhancing the tensile strength and durability of the geotextile and further improving its service life.

[0007] A further option is that both the first and second twill weaves are right-hand twill weaves, and the second twill weave has more warp weave points than the first twill weave.

[0008] A further option is to set the double-weft structure within the second twill weave.

[0009] A further approach is to simultaneously incorporate a double warp structure within both the first and second twill weave structures.

[0010] A further proposal is to proceed in the following direction:

[0011] The warp weave points of the first warp yarn are as follows: 2 up, 2 down, 2 up, 3 down, 2 up, 1 down;

[0012] The warp weave points of the second warp yarn are as follows: 1st, 2nd, 2nd, 2nd, 3rd, 2nd, 2nd;

[0013] The warp weave points of the third warp yarn are as follows: 2 down, 2 up, 2 down, 3 up, 2 down, 1 up;

[0014] The warp stitch points of the fourth warp are as follows: 2 knit, 2 purl, 2 knit, 3 purl, 2 knit, 1 purl;

[0015] The warp stitch points of the fifth warp are as follows: 1 up, 2 down, 2 up, 2 down, 3 up, 2 down;

[0016] The warp weave points of the sixth warp yarn are as follows: 2 up, 2 down, 2 up, 3 down, 2 up, 1 down.

[0017] A further proposed solution is to use a linear density of 670 dtex for both warp and weft yarns; and to use a warp density of 172 threads / 10cm and a weft density of 123 threads / 10cm for the geotextile.

[0018] A further proposed solution is to set both the first and second preset distances to 25cm. Attached Figure Description

[0019] Figure 1 This is an organizational structure diagram of an embodiment of the present utility model.

[0020] Figure 2 This is a partial weaving structure diagram of an embodiment of the present utility model.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0022] See Figure 1 and Figure 2 This embodiment provides a geotextile for filtration, comprising multiple warp yarns 100 and multiple weft yarns 200.

[0023] Multiple warp yarns 100 and multiple weft yarns 200 are interwoven according to a preset twill weave to form a geotextile. The preset twill weave includes several first twill weaves 500 and several second twill weaves 600, which are arranged at intervals along the warp direction. Both the first twill weaves 500 and the second twill weaves 600 are right-hand twill weaves, and the second twill weaves 600 have more warp weave points than the first twill weaves 500.

[0024] In the warp direction, double weft structures 300 are provided at first preset intervals, and / or, in the weft direction, double warp structures 400 are provided at second preset intervals. Preferably, both double weft structures 300 and double warp structures 400 are added simultaneously in this embodiment. The double warp structure 400 is simultaneously disposed within the first twill weave 500 and the second twill weave 600. The double weft structure 300 can be disposed within the first twill weave 500 or the second twill weave 600; in this embodiment, it is preferred that the double weft structure 300 be disposed within the second twill weave 600.

[0025] The first preset distance and the second preset distance can be equal or unequal. In this embodiment, the first preset distance and the second preset distance are preferably both 25cm.

[0026] In terms of direction:

[0027] The warp weave points of the first warp yarn 1 are as follows: 2 up, 2 down, 2 up, 3 down, 2 up, 1 down;

[0028] The warp weave points of the second warp yarn 2 are as follows: 1st down 2nd up 2nd down 2nd up 3rd down 2nd up;

[0029] The warp weave points of the third warp yarn 3 are as follows: 2 down 2 up 2 down 3 up 2 down 1 up;

[0030] The warp weave points of the fourth warp yarn 4 are as follows: 2 knit, 2 purl, 2 knit, 3 purl, 2 knit, 1 purl;

[0031] The warp weave points of the fifth warp yarn 5 are as follows: 1 up 2 down 2 up 2 down 3 up 2 down;

[0032] The warp weave points of the sixth warp yarn 6 are as follows: 2 up, 2 down, 2 up, 3 down, 2 up, 1 down.

[0033] Furthermore, the linear density of both warp 100 and weft 200 is 670 dtex; the warp density of the geotextile is 172 threads / 10cm, and the weft density is 123 threads / 10cm.

[0034] The geotextile of this embodiment is woven according to the above-mentioned preset twill weave, and has a uniform and simple pore structure and high permeability, with a pore size of approximately 0.329 mm. In contrast, the geotextiles woven using ordinary twill weave in the prior art have a pore size of approximately 0.385 mm. The pore size of this embodiment is reduced by 14.5%, which on the one hand helps to increase the structural compactness of the geotextile, giving it high compressibility and maintaining stable equivalent pore size and permeability even under high loads. On the other hand, the simple fabric structure, without complex open-pore structures that trap particles, has a much smaller specific surface area available for chemical deposition and the formation of biofilms. Under high hydraulic gradients and flow conditions, it maintains high permeability while possessing high anti-clogging ability.

[0035] Geotextiles woven using the aforementioned pre-designed twill weave also possess high tensile strength, excellent permeability, superb durability, excellent resistance to harsh chemical environments, and outstanding resistance to construction damage.

[0036] The geotextiles in this embodiment can be applied to underground drainage projects, marine engineering, landfill projects, etc.

[0037] When applied to underground drainage projects, it can be used as a filter layer in various underground drainage systems, such as drainage ditches, horizontal drainage mats, vertical drainage behind retaining wall structures, and vertical drainage pipes in earthen embankments and dikes to control seepage. Due to its high permeability even at low hydraulic gradients, it is also an ideal material for drainage in sports fields.

[0038] When applied to marine engineering, the rapid elimination of hydrostatic pressure through geotextiles is crucial to the long-term performance of the project. The high anti-clogging properties of the geotextile in this embodiment make it an ideal filter material for soil and rock dams and filter layers under rock protection layers.

[0039] When applied to landfill engineering, the geotextile of this embodiment, due to its high tensile strength, can be used as a reinforcement layer for weak foundations. Before laying the landfill liner system, it can also serve as an isolation and filtration layer. Due to its excellent anti-clogging properties, it is also an ideal material for filtering landfill leachate on the surface of the leachate drainage layer.

[0040] In this embodiment, both the warp yarn 100 and the weft yarn 200 are made of a mixture of polypropylene and polyethylene, and are extruded by an extruder.

[0041] Polypropylene possesses excellent mechanical properties and good heat resistance, with a melting point of 164-170℃, a heat distortion temperature typically reaching 110℃, and an embrittlement temperature of -35℃. Yarn made solely of polypropylene exhibits poor impact strength at low temperatures.

[0042] Furthermore, in the warp yarn 100 and / or weft yarn 200, polyethylene is preferably high-density polyethylene.

[0043] Both warp 100 and weft 200 are made of: 49.12%-50.88% polypropylene, 43.12%-44.88% high-density polyethylene, and the remainder is filler, including color masterbatch. High-density polyethylene has good impact resistance and cold resistance, can resist environmental stress cracking, and has excellent chemical stability, good oil resistance, minimal water absorption, low water permeability, and relatively high organic vapor permeability.

[0044] This embodiment uses a blend of polypropylene and high-density polyethylene to make yarn, which significantly improves its impact strength, toughness, low-temperature resistance, and mechanical modulus. Its tensile strength, flexural strength, and hardness, representing rigidity, are all higher than yarn made solely of polypropylene, while its impact strength and low-temperature brittleness, representing toughness, are also improved, making it suitable for cold regions. Furthermore, the modified yarn also possesses advantages such as good toughness, high tensile strength, good flexural strength, high hardness, good UV protection, and good anti-aging properties, which help extend its service life.

[0045] In summary, this utility model produces a geotextile by interlacing warp and weft yarns in a pre-set twill weave. This special weaving structure improves the geotextile's toughness and impact strength, making it suitable for high-load applications and extending its service life. Furthermore, by adding double-weft and / or double-warp structures at pre-set intervals in the warp and weft directions, the fabric density is increased, thereby enhancing the geotextile's tensile strength and durability, further improving its service life.

[0046] Finally, it should be emphasized that the above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A geotextile for filtration, comprising multiple warp yarns and multiple weft yarns, characterized in that: Multiple warp yarns and multiple weft yarns are interwoven according to a preset twill weave structure, wherein the preset twill weave structure includes a plurality of first twill weave structures and a plurality of second twill weave structures, and the plurality of first twill weave structures and the plurality of second twill weave structures are arranged at intervals along the warp direction; In the longitudinal direction, a double latitude structure is set at every first preset distance, and / or, in the latitudinal direction, a double longitude structure is set at every second preset distance.

2. The geotextile for filtration according to claim 1, characterized in that: Both the first twill weave and the second twill weave are right-hand twill weaves, and the second twill weave has more warp weave points than the first twill weave.

3. The geotextile for filtration according to claim 1, characterized in that: The double-weft structure is disposed within the second twill weave.

4. The geotextile for filtration according to claim 1, characterized in that: The double warp structure is simultaneously disposed within both the first twill weave and the second twill weave.

5. The geotextile for filtration according to claim 1, characterized in that: In terms of direction: The warp weave points of the first warp yarn are as follows: 2 up, 2 down, 2 up, 3 down, 2 up, 1 down; The warp weave points of the second warp yarn are as follows: one down, two up, two down, two up, three down, two up; The warp weave points of the third warp yarn are as follows: two down, two up, two down, three up, two down, one up; The warp weave points of the fourth warp yarn are as follows: two down, two up, two down, three up, two down, one up; The warp weave points of the fifth warp are as follows: 1 up, 2 down, 2 up, 2 down, 3 up, 2 down; The warp weave points of the sixth warp are as follows: 2 up, 2 down, 2 up, 3 down, 2 up, 1 down.

6. The geotextile for filtration according to claim 1, characterized in that: The linear density of both the warp and weft yarns is 670 dtex; the warp density of the geotextile is 172 threads / 10cm, and the weft density is 123 threads / 10cm.

7. The geotextile for filtration according to claim 1, characterized in that: Both the first preset distance and the second preset distance are 25cm.

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