High-strength mildew-proof flexible anti-seepage cloth and preparation method thereof

Abstract

The present invention belongs to the field of polymer material engineering technology, and specifically relates to a high-strength, mildew-proof, flexible, and seepage-proof fabric and a method for preparing the same. The present invention utilizes high-density polyethylene (PE) through drawing, warping, and weaving to obtain a high-density polyethylene woven fabric. The front and back sides of the woven fabric are treated with an anti-dialysis treatment. The front and back sides of the woven fabric are obtained by a double-layer co-extrusion coating method, and the anti-seepage fabric is composited with a woven fabric to obtain the anti-seepage fabric. The anti-seepage fabric obtained by the present invention has a soft surface, high strength, excellent waterproof performance, and good mildew and aging resistance. It can provide the anti-seepage fabric with more functional requirements while ensuring bonding strength, and can be formed in one step, eliminating the need for a secondary composite process.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer material engineering, and particularly relates to a high-strength mildew-proof flexible anti-seepage cloth and a preparation method thereof. Background Art

[0002] PVC composite fabrics currently account for a large proportion of fabrics used in aquaculture. Due to their material properties, large amounts of additives, such as plasticizers and heat stabilizers, must be added during processing. During the use of finished PVC composite fabrics, these additives may leach into the water, forming biotoxicity and depositing in aquatic products. Consuming such aquatic products is detrimental to human health. Furthermore, after long-term use, mold growth is prone to forming on the surface of PVC composite fabrics. Recycling PVC composite fabrics at the end of their service life is difficult. Since PVC composite fabrics are composed of two or more materials, they are difficult to separate. Incineration also produces large amounts of harmful gases, which pose a significant threat to the environment.

[0003] Therefore, an environmentally friendly alternative to PVC composite fabric is urgently needed. Polyethylene composite fabric, with its lightweight, high strength, environmental friendliness, non-toxicity, and easy recycling, is widely used and an ideal alternative to PVC composite fabric. However, to gain a competitive advantage in the market, improvements to the process and functionality of polyethylene composite fabric are necessary. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-strength mildew-proof flexible anti-seepage cloth.

[0005] Another aspect of the present invention is to provide a method for preparing the high-strength mildew-proof flexible anti-seepage cloth.

[0006] According to a specific embodiment of the present invention, the high-strength mildew-proof flexible anti-seepage cloth comprises, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer, wherein, according to the weight ratio,

[0007] The raw materials for preparing the polyethylene skeleton layer include: 90-110 parts of high-density polyethylene (HDPE), 3-5 parts of calcium carbonate masterbatch, 1-5 parts of blue masterbatch, and 2-5 parts of anti-aging masterbatch.

[0008] The raw materials for preparing the upper adhesive layer and the lower adhesive layer are independently selected from: 90-110 parts of LDPE, 3-10 parts of blue masterbatch, 3-10 parts of EAA and 3-10 parts of anti-aging masterbatch.

[0009] The raw materials for preparing the upper functional layer and the lower functional layer are independently selected from: 90-110 parts of LDPE, 3-10 parts of blue masterbatch, 3-10 parts of copper ion antibacterial agent and 3-10 parts of anti-aging masterbatch.

[0010] According to a specific embodiment of the present invention, the high-strength mildew-proof flexible anti-seepage cloth comprises, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer, wherein, according to the weight ratio,

[0011] The raw materials for preparing the polyethylene skeleton layer include: 90 parts of high-density polyethylene (HDPE), 3 parts of calcium carbonate masterbatch, 1 part of blue masterbatch, and 2 parts of anti-aging masterbatch.

[0012] The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer respectively include: 90 parts of LDPE, 3 parts of blue masterbatch, 3 parts of EAA and 3 parts of anti-aging masterbatch.

[0013] The raw materials for preparing the upper functional layer and the lower functional layer respectively include: 90 parts of LDPE, 3 parts of blue masterbatch, 3 parts of copper ion antibacterial agent and 3 parts of anti-aging masterbatch.

[0014] According to a specific embodiment of the present invention, the high-strength mildew-proof flexible anti-seepage cloth comprises, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer, wherein, according to the weight ratio,

[0015] The raw materials for preparing the polyethylene skeleton layer include: 110 parts of high-density polyethylene HDPE, 5 parts of calcium carbonate masterbatch, 5 parts of blue masterbatch, and 5 parts of anti-aging masterbatch.

[0016] The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer respectively include: LDPE 110 parts, blue masterbatch 10 parts, EAA 10 parts and anti-aging masterbatch 10 parts.

[0017] The raw materials for preparing the upper functional layer and the lower functional layer respectively include: 110 parts of LDPE, 10 parts of blue masterbatch, 10 parts of copper ion antibacterial agent and 10 parts of anti-aging masterbatch.

[0018] According to a specific embodiment of the present invention, the high-strength mildew-proof flexible anti-seepage cloth comprises, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer, wherein, according to the weight ratio,

[0019] The raw materials for preparing the polyethylene skeleton layer include: 100 parts of high-density polyethylene (HDPE), 4 parts of calcium carbonate masterbatch, 1.5 parts of blue masterbatch, and 3 parts of anti-aging masterbatch.

[0020] The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer respectively include: 100 parts of LDPE, 5 parts of blue masterbatch, 6 parts of EAA and 5 parts of anti-aging masterbatch.

[0021] The raw materials for preparing the upper functional layer and the lower functional layer respectively include: 100 parts of LDPE, 5 parts of blue masterbatch, 6 parts of copper ion antibacterial agent and 5 parts of anti-aging masterbatch.

[0022] Polyethylene is primarily classified into three categories: high-density polyethylene (HDPE), low-density polyethylene (LDPE), and linear low-density polyethylene (LLDPE). HDPE is a highly crystalline, non-polar thermoplastic resin produced by copolymerization with ethylene. LDPE is the lightest polyethylene resin.

[0023] In addition to the above-mentioned raw materials, commercially available products or related masterbatches can also be used. Those skilled in the art can select them according to actual needs. Alternatively, those skilled in the art can add or subtract ingredients based on the formula of the present invention, or independently configure the product. For example, low-density polyethylene (greater than 90%), anti-light aging functional masterbatch (1%-5%) and smooth masterbatch (1-5%); high-density polyethylene (20-40%), low-density polyethylene (50-80%) and anti-aging masterbatch (1%-5%); high-density polyethylene (20-40%), low-density polyethylene (50-80%) and polyethylene graft modified material (1%-10%), etc.

[0024] According to a specific embodiment of the present invention, a method for preparing a high-strength mildew-proof flexible anti-seepage cloth comprises the following steps:

[0025] (1) preparing raw materials for the polyethylene skeleton layer according to the ratio;

[0026] (2) Casting:

[0027] (3) warping;

[0028] (4) weaving to obtain a polyethylene skeleton layer;

[0029] (5) performing an anti-dialysis treatment on the polyethylene skeleton layer obtained in step (4);

[0030] (6) Double-layer lamination to obtain the anti-seepage cloth, which includes an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer from top to bottom.

[0031] According to the method for preparing the high-strength mildew-proof flexible anti-seepage cloth in a specific embodiment of the present invention, in step (4), the cloth is woven using a rapier loom.

[0032] According to the method for preparing a high-strength, mildew-proof, flexible, and seepage-proof cloth in a specific embodiment of the present invention, in step (5) of the anti-dialysis treatment, the polyethylene skeleton layer is first subjected to an initial treatment at a temperature of 50°C and a pressure of 10 MPa, and then subjected to a secondary treatment at a temperature of 65°C and a pressure of 15 MPa.

[0033] According to the method for preparing a high-strength, mildew-proof, flexible, and seepage-proof cloth in a specific embodiment of the present invention, in step (6) of the double-layer lamination, the upper adhesive layer and the lower adhesive layer are obtained by extruding a cast film through a single-screw extruder at an extrusion temperature of 280° C.

[0034] The upper functional layer and the lower functional layer are obtained by extruding a cast film through a single-screw extruder at an extrusion temperature of 260°C.

[0035] Beneficial effects of the present invention:

[0036] The invention greatly improves the mechanical properties, bonding properties, mildew resistance and aging properties of the obtained anti-seepage cloth, and makes the hand feel softer, thus meeting the outdoor use requirements of aquaculture. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 The tape-casting and drawing equipment of the present invention is shown, wherein,

[0039] Among them, 1-wire dividing knife; 2-traction roller; 3-preheating roller; 4-drafting plate; 5-traction roller; 6-forming roller group; 7-wire collecting guide roller. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0041] The present invention provides a high-strength, mildew-proof, flexible, and seepage-proof cloth, which comprises, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer, and a lower functional layer, wherein, according to the weight ratio,

[0042] The raw materials for preparing the polyethylene skeleton layer include: 90-110 parts of high-density polyethylene (HDPE), 3-5 parts of calcium carbonate masterbatch, 1-5 parts of blue masterbatch, and 2-5 parts of anti-aging masterbatch.

[0043] The raw materials for preparing the upper adhesive layer and the lower adhesive layer are independently selected from: 90-110 parts of LDPE, 3-10 parts of blue masterbatch, 3-10 parts of EAA and 3-10 parts of anti-aging masterbatch.

[0044] The raw materials for preparing the upper functional layer and the lower functional layer are independently selected from: 90-110 parts of LDPE, 3-10 parts of blue masterbatch, 3-10 parts of copper ion antibacterial agent and 3-10 parts of anti-aging masterbatch.

[0045] At the same time, the present invention also provides a method for preparing an anti-seepage cloth, which includes the following steps: cast wire drawing, warping, weaving, anti-dialysis treatment, laminating, and finished product winding.

[0046] Specifically, the method for preparing the anti-seepage cloth of the present invention comprises the following steps:

[0047] (1) Casting:

[0048] The raw materials for preparing the polyethylene skeleton layer are mixed uniformly according to proportion, extruded into a film through a single-screw extruder, and cut into flat yarns after cooling;

[0049] The flat yarn is preheated at 50-70°C, stretched at 80-120°C, and then shaped at 100-130°C to obtain a flat yarn with a width of 3-4 mm and a density of 0.5-0.7 N / tex.

[0050] (2) warping the flat yarn obtained in step (1) using a warping machine;

[0051] (3) using a rapier loom to weave to obtain a polyethylene skeleton layer base fabric;

[0052] (4) The obtained polyethylene skeleton layer base fabric is subjected to an anti-dialysis treatment, wherein the polyethylene skeleton layer base fabric is first subjected to an initial treatment at a temperature of 50° C. and a pressure of 10 MPa, and then subjected to a secondary treatment at a temperature of 65° C. and a pressure of 15 MPa;

[0053] (5) double-layer co-extrusion lamination is performed on the treated polyethylene skeleton layer base fabric to obtain the anti-seepage fabric, wherein:

[0054] After the adhesive layer raw materials are mixed in proportion, the cast film is extruded through a single screw extruder at an extrusion temperature of 280°C and a gram weight of about 20g / m 2 , obtaining an upper adhesive layer and a lower adhesive layer;

[0055] After the functional layer raw materials are mixed in proportion, the cast film is extruded through a single screw extruder at an extrusion temperature of 260°C and a gram weight of about 30g / m 2 , get the upper functional layer and the lower functional layer,

[0056] The total weight of the obtained anti-seepage cloth is about 300g / m 2 .

[0057] The casting and drawing steps of the present invention include the following procedures in sequence: casting - separating - pulling roller - preheating roller - drawing plate - drawing roller - shaping roller group - collecting, and the corresponding equipment (casting parts are not shown) is as follows: Figure 1 As shown, it includes a wire dividing knife 1, a pulling roller 2, a preheating roller 3, a drafting plate 4, a pulling roller 5, a shaping roller group 6, and a wire collecting guide roller 7.

[0058] The temperature of the preheating roller group is 50-70°C, the temperature of the drafting plate is 80-120°C, and the temperature of the setting roller group is 100-130°C. The processing process is first preheated by the preheating roller group, then stretched, and finally set by the setting roller group at 100-130°C, thereby increasing the relative tensile force of the monofilament to 0.5-0.7N / tex and significantly improving the appearance quality of the flat yarn. Under the condition that the stretching ratio is increased to 8-10, the addition of the preheating roller group can greatly reduce the breakage rate by more than 50%, and reduce the occurrence of flat yarn cracking. The present invention improves the surface quality of the flat yarn by improving the wire drawing process, thereby improving the efficiency of the subsequent warping process. At the same time, the monofilament tensile force is higher, and the phenomenon of wire breakage is less likely to occur during the warping process, thereby reducing the frequency of defects in the weaving process of the rapier loom.

[0059] During the weaving step, a rapier loom is used to weave the cloth to obtain a high-density skeleton layer as the base cloth, and the moisture content of the base cloth is reduced to about 1%, thereby avoiding the problem of poor adhesion caused by the high moisture content of the polyethylene skeleton layer base cloth, ensuring the bonding strength between the coating layer and the skeleton layer in the double-layer coating step, and helping to enhance the seam strength of the anti-seepage cloth.

[0060] The polyethylene skeleton layer base fabric is treated with anti-dialysis treatment: the anti-dialysis treatment equipment includes two sets of heated steel rollers and one set of rubber rollers, which work together to treat the surface of the base fabric. Specifically,

[0061] According to the conveying direction of the base fabric, the anti-dialysis treatment equipment includes a first pressing roller group and a second pressing roller group from upstream to downstream, wherein:

[0062] The first pressing roller group includes a first rubber roller and a first steel roller, wherein the first rubber roller is arranged below the first steel roller, the first rubber roller is a pressure roller, and the first steel roller is a heating roller, so as to heat and pressurize the base fabric;

[0063] The second pressing roller group includes a second rubber roller and a second steel roller. The second rubber roller is arranged below the second steel roller. The second rubber roller is a pressure roller and the second steel roller is a heating roller to perform secondary heating and pressurizing treatment on the polyethylene woven fabric.

[0064] When the temperature of the first set of hot rollers is 60-80°C and the pressure is 15-25 MPa, the surface quality of the base fabric is optimal, and the thermal shrinkage of the finished product can be controlled within 2%.

[0065] In the laminating step, the present invention adopts a double-layer co-extrusion laminating method, and divides the laminating layer into a double-layer structure of an inner adhesive layer and an outer functional layer. By controlling the formula and extrusion temperature of the two layers, a better use effect is achieved, that is, the temperature of the outer layer is appropriately lowered during the casting process to reduce the precipitation and degradation of the additives, and both layers are processed at the melting temperature and can be well fused, so that the base fabric feels softer, and the mildew resistance and aging resistance effects are significantly improved. The finished product made of the double-layer co-extrusion laminating has its tensile properties improved by about 10%, the aging performance improved by about 6%, and the mildew resistance level improved from level 1 to level 0.

[0066] The traditional lamination process adopts the method of single-layer lamination on both sides, and the functional layer of the product is obtained by adding functional additives. Usually, the temperature is relatively high in one-time lamination. Generally, the temperature in one-time lamination molding is ≥280℃, and the lamination thickness is relatively thick. It is not easy to dissipate heat, which will cause the additives to precipitate faster, affecting the bonding effect and reducing the role of the additives in the end product.

[0067] Example 1

[0068] The high-strength mildew-proof flexible anti-seepage fabric of this embodiment comprises, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer, wherein, according to the weight ratio (1 part by weight is 1 kg),

[0069] The raw materials for preparing the polyethylene skeleton layer include: 90 parts of high-density polyethylene (HDPE), 3 parts of calcium carbonate masterbatch, 1 part of blue masterbatch, and 2 parts of anti-aging masterbatch.

[0070] The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer include: 90 parts of LDPE, 3 parts of blue masterbatch, 3 parts of EAA and 3 parts of anti-aging masterbatch.

[0071] The raw materials for preparing the upper functional layer and the lower functional layer include: 90 parts of LDPE, 3 parts of blue masterbatch, 3 parts of copper ion antibacterial agent and 3 parts of anti-aging masterbatch.

[0072] Example 2

[0073] The high-strength mildew-proof flexible anti-seepage fabric of this embodiment comprises, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer, wherein, according to the weight ratio, (1 part by weight is 1 kg),

[0074] The raw materials for preparing the polyethylene skeleton layer include: 110 parts of high-density polyethylene HDPE, 5 parts of calcium carbonate masterbatch, 5 parts of blue masterbatch, and 5 parts of anti-aging masterbatch.

[0075] The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer include: 110 parts of LDPE, 10 parts of blue masterbatch, 10 parts of EAA and 10 parts of anti-aging masterbatch.

[0076] The raw materials for preparing the upper functional layer and the lower functional layer include: 110 parts of LDPE, 10 parts of blue masterbatch, 10 parts of copper ion antibacterial agent and 10 parts of anti-aging masterbatch.

[0077] Example 3

[0078] The high-strength mildew-proof flexible anti-seepage fabric of this embodiment comprises, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer, wherein, according to the weight ratio, (1 part by weight is 1 kg),

[0079] The raw materials for preparing the polyethylene skeleton layer include: 100 parts of high-density polyethylene (HDPE), 4 parts of calcium carbonate masterbatch, 1.5 parts of blue masterbatch, and 3 parts of anti-aging masterbatch.

[0080] The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer include: 100 parts of LDPE, 5 parts of blue masterbatch, 6 parts of EAA and 5 parts of anti-aging masterbatch.

[0081] The raw materials for preparing the upper functional layer and the lower functional layer include: 100 parts of LDPE, 5 parts of blue masterbatch, 6 parts of copper ion antibacterial agent and 5 parts of anti-aging masterbatch.

[0082] Example 4

[0083] The method for preparing the anti-seepage cloth of this embodiment comprises the following steps:

[0084] (1) Casting:

[0085] High-density polyethylene (HDPE), calcium carbonate masterbatch, blue masterbatch, and anti-aging masterbatch are mixed evenly in a weight ratio of 100:4:1.5:3, extruded into a film through a single-screw extruder, cooled at 30°C, and then cut into flat yarns;

[0086] The flat yarn is preheated by a preheating roller at 55°C, stretched by a drafting plate at 100°C, and then shaped by a shaping roller group at 120°C to obtain a flat yarn with a width of 3.5mm, a density of 120tex, and a relative tensile force of 0.55N / tex.

[0087] (2) warping the flat yarn obtained in step (1) using a warping machine;

[0088] (3) Use a rapier loom to weave a base fabric with a weaving density of 20*20 (warp density 20p / inch; weft density 20p / inch), and control the weight at 200g / m 2 .

[0089] (4) The obtained base fabric is treated twice using an anti-dialysis treatment device, and the temperature and pressure of the two sets of hot rollers are set to 50°C, 10 MPa; and 65°C, 15 MPa.

[0090] (5) Double-layer lamination of the treated base fabric:

[0091] Internal adhesive layer: LDPE, blue masterbatch, EAA, anti-aging masterbatch in a weight ratio of 100:5:6:5, through a single screw extruder to extrude cast film, the extrusion temperature is 280 ℃, the gram weight is about 20g / m 2 ;

[0092] External functional layer: LDPE, blue masterbatch, copper ion antibacterial agent, anti-aging masterbatch are mixed in a weight ratio of 100:5:6:5. After mixing, the film is extruded through a single screw extruder at an extrusion temperature of 260°C and a gram weight of about 30g / m 2 ;

[0093] The total weight of the double-sided composite fabric obtained after double-layer co-extrusion lamination is about 300g / m 2 .

[0094] Comparative Example 1

[0095] The method is the same as that of Example 4, except that the flat yarn is preheated without the step of preheating. The flat yarn is directly stretched at 80℃-120℃ and shaped at 100℃-130℃. The lamination is a double-sided lamination with a thickness of 50g / m 2 .

[0096] When the stretching ratio is 6-7 times, the relative tensile load of the obtained monofilament is 0.4N / tex-0.5N / tex. When the stretching ratio is further increased, the flat yarn will crack or break, affecting product quality and production efficiency.

[0097] Single-layer laminating film, the raw materials are LDPE, blue masterbatch, copper ion antibacterial agent, anti-aging masterbatch in the ratio of 100:5:6:5, through a single screw extruder to extrude cast film, the extrusion temperature is 280℃, double-sided one-time laminating 50g / m 2 composite fabric.

[0098] Comparative Example 2

[0099] The method is the same as Example 4.

[0100] When the stretching ratio is 8-10 times, the obtained monofilament is subjected to a relative tensile load of 0.55N / tex and a single-layer coating is performed. The raw materials are LDPE, blue masterbatch, copper ion antibacterial agent, and anti-aging masterbatch in a ratio of 100:5:6:5. The cast film is extruded through a single-screw extruder at an extrusion temperature of 280°C and a double-sided coating of 50g / m 2composite fabric.

[0101] The products obtained in Example 4, Comparative Example 1 and Comparative Example 2 were tested, and the results were as follows:

[0102]

[0103] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. High-strength mildew-proof flexible anti-seepage cloth, characterized by: The anti-seepage cloth comprises an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer from top to bottom, wherein, according to the weight ratio, The raw materials for preparing the polyethylene skeleton layer include: 90-110 parts of high-density polyethylene, 3-5 parts of calcium carbonate masterbatch, 1-5 parts of blue masterbatch, and 2-5 parts of anti-aging masterbatch. The raw materials for preparing the upper adhesive layer and the lower adhesive layer are independently selected from: 90-110 parts of LDPE, 3-10 parts of blue masterbatch, 3-10 parts of EAA and 3-10 parts of anti-aging masterbatch. The raw materials for preparing the upper functional layer and the lower functional layer are independently selected from: 90-110 parts of LDPE, 3-10 parts of blue masterbatch, 3-10 parts of copper ion antibacterial agent and 3-10 parts of anti-aging masterbatch; The high-strength mildew-proof flexible anti-seepage cloth is prepared by the following method, comprising the following steps: (1) Prepare the raw materials for the polyethylene skeleton layer according to the ratio; (2) Casting: (3) Warping; (4) Weaving to obtain a polyethylene skeleton layer; (5) performing an anti-dialysis treatment on the polyethylene skeleton layer obtained in step (4); (6) double-layer lamination to obtain the anti-seepage cloth, which includes, from top to bottom, an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer, and a lower functional layer; In step (5) of the anti-dialysis treatment, the polyethylene skeleton layer is first treated at a temperature of 50°C and a pressure of 10 MPa, and then treated at a temperature of 65°C and a pressure of 15 MPa. In step (6), in the double-layer lamination, the upper adhesive layer and the lower adhesive layer are obtained by extruding a cast film by a single-screw extruder at an extrusion temperature of 280°C; The upper functional layer and the lower functional layer are obtained by extruding a cast film through a single-screw extruder at an extrusion temperature of 260°C.

2. The high-strength, mildew-proof, flexible, impermeable fabric according to claim 1, characterized in that: The anti-seepage cloth comprises an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer from top to bottom, wherein, according to the weight ratio, The raw materials for preparing the polyethylene skeleton layer include: 90 parts of high-density polyethylene (HDPE), 3 parts of calcium carbonate masterbatch, 1 part of blue masterbatch, and 2 parts of anti-aging masterbatch. The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer respectively include: 90 parts of LDPE, 3 parts of blue masterbatch, 3 parts of EAA and 3 parts of anti-aging masterbatch. The raw materials for preparing the upper functional layer and the lower functional layer respectively include: 90 parts of LDPE, 3 parts of blue masterbatch, 3 parts of copper ion antibacterial agent and 3 parts of anti-aging masterbatch.

3. The high-strength, mildew-proof, flexible, impermeable fabric according to claim 1, characterized in that: The anti-seepage cloth comprises an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer from top to bottom, wherein, according to the weight ratio, The raw materials for preparing the polyethylene skeleton layer include: 110 parts of high-density polyethylene HDPE, 5 parts of calcium carbonate masterbatch, 5 parts of blue masterbatch, and 5 parts of anti-aging masterbatch. The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer respectively include: LDPE 110 parts, blue masterbatch 10 parts, EAA 10 parts and anti-aging masterbatch 10 parts. The raw materials for preparing the upper functional layer and the lower functional layer respectively include: 110 parts of LDPE, 10 parts of blue masterbatch, 10 parts of copper ion antibacterial agent and 10 parts of anti-aging masterbatch.

4. The high-strength, mildew-proof, flexible, impermeable fabric according to claim 1, characterized in that: The anti-seepage cloth comprises an upper functional layer, an upper adhesive layer, a polyethylene skeleton layer, a lower adhesive layer and a lower functional layer from top to bottom, wherein, according to the weight ratio, The raw materials for preparing the polyethylene skeleton layer include: 100 parts of high-density polyethylene (HDPE), 4 parts of calcium carbonate masterbatch, 1.5 parts of blue masterbatch, and 3 parts of anti-aging masterbatch. The raw materials for the preparation of the upper adhesive layer and the lower adhesive layer respectively include: 100 parts of LDPE, 5 parts of blue masterbatch, 6 parts of EAA and 5 parts of anti-aging masterbatch. The raw materials for preparing the upper functional layer and the lower functional layer respectively include: 100 parts of LDPE, 5 parts of blue masterbatch, 6 parts of copper ion antibacterial agent and 5 parts of anti-aging masterbatch.

5. The high-strength, mildew-proof, flexible, impermeable fabric according to claim 1, characterized in that: In step (4), the fabric is woven using a rapier loom.

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