A multi-layer composite polyethylene polypropylene waterproof membrane and its preparation method

Abstract

This invention relates to the field of waterproof membrane technology, and proposes a multi-layer composite polyethylene-polypropylene waterproof membrane and its preparation method. The multi-layer composite polyethylene-polypropylene waterproof membrane is composed of two or more polyethylene-polypropylene waterproof membranes, which are composites of polyethylene sheets and polypropylene fabric. The polyethylene sheets comprise the following components by weight: polyethylene, polyvinyl alcohol fibers, antioxidants, ultraviolet absorbers, lubricants, and plasticizers. The polyvinyl alcohol fibers consist of a first polyvinyl alcohol fiber and a second polyvinyl alcohol fiber, with different linear densities. This technical solution solves the problems of low waterproof performance and low mechanical strength in related waterproof membranes.

Description

Technical Field

[0001] This invention relates to the field of waterproof membrane technology, specifically to a multi-layer composite polyethylene polypropylene waterproof membrane and its preparation method. Background Technology

[0002] In the fields of building construction and civil engineering, waterproof membranes play a crucial role in ensuring building waterproofing and leak prevention. Their performance directly affects the service life and functionality of buildings. Traditional waterproof membranes, such as bitumen-based waterproof membranes, while widely used, have drawbacks such as easy aging, poor durability, and significant environmental pollution during construction. Polyvinyl chloride (PVC) waterproof membranes have also revealed problems such as poor weather resistance and easy deformation over long-term use, making it difficult to meet the increasingly stringent performance and environmental requirements of modern buildings for waterproofing layers.

[0003] Polyethylene polypropylene waterproof membranes, with their excellent weather resistance, corrosion resistance, and good mechanical properties, coupled with relatively low cost, have stood out among many waterproof membranes, becoming a material with broad application prospects. However, with the continuous development of building technology and the gradual increase in waterproofing requirements, single-layer polyethylene polypropylene waterproof layers still have limitations in waterproofing performance and mechanical strength when facing some special environments or projects with high waterproofing requirements. Therefore, it is necessary to develop a multi-layer composite polyethylene polypropylene waterproof membrane with high waterproofing performance and high mechanical strength. Summary of the Invention

[0004] This invention proposes a multi-layer composite polyethylene polypropylene waterproof membrane and its preparation method, which solves the problems of low waterproof performance and low mechanical strength of waterproof membranes in related technologies.

[0005] The technical solution of this invention is as follows: This invention proposes a multi-layer composite polyethylene polypropylene waterproof membrane, composed of two or more polyethylene polypropylene waterproof membranes. One side of each polyethylene polypropylene waterproof membrane has an insertion gap for partial insertion of another polyethylene polypropylene waterproof membrane. The polyethylene polypropylene waterproof membrane, from top to bottom, comprises a first polyethylene polypropylene layer, a first polymer adhesive layer, a second polyethylene polypropylene layer, a second polymer adhesive layer, a first isolation layer, and a second isolation layer. The insertion gap is located between the first polymer adhesive layer and the second polyethylene polypropylene layer. The second isolation layer is provided with… The first polymer adhesive layer is placed on the lower surface of the insertion gap. Both the first and second polyethylene polypropylene layers are composed of polyethylene sheets and polypropylene fabric. The polyethylene sheets include the following raw materials in parts by weight: 80-90 parts polyethylene, 5-10 parts polyvinyl alcohol fiber, 0.2-0.5 parts antioxidant, 0.1-0.3 parts ultraviolet absorber, 0.1-0.3 parts lubricant, and 1-3 parts plasticizer. The polyvinyl alcohol fiber is composed of first polyvinyl alcohol fiber and second polyvinyl alcohol fiber, and the linear densities of the first and second polyvinyl alcohol fibers are different.

[0006] As a further technical solution, after a portion of another polyethylene polypropylene waterproof membrane is inserted, the first isolation layer and the second isolation layer are removed, and the first polyethylene polypropylene layer of the other polyethylene polypropylene waterproof membrane is composited with the first polymer adhesive layer, and the second polyethylene polypropylene layer is composited with the second polymer adhesive layer.

[0007] As a further technical solution, the linear density of the first polyvinyl alcohol fiber is 0.91 g / cm³. 3 The linear density of the second polyvinyl alcohol fiber is 1.3 g / cm³. 3 The mass ratio of the first polyvinyl alcohol fiber to the second polyvinyl alcohol fiber is 1:3~4.

[0008] As a further technical solution, the raw material of the polyethylene sheet also includes calcium carbonate, and the mass ratio of the polyvinyl alcohol fiber to the calcium carbonate is 2:4~5.

[0009] In this invention, polyvinyl alcohol fiber and calcium carbonate are added simultaneously to leverage their synergistic effect, fill tiny gaps, and further enhance the mechanical strength of the multi-layer composite polyethylene polypropylene waterproof membrane.

[0010] As a further technical solution, the calcium carbonate is modified calcium carbonate, which is obtained by modifying calcium carbonate with a modifier, wherein the modifier is a fluoroalkyl alcohol compound.

[0011] In this invention, fluoroalkyl alcohol compounds are used to modify calcium carbonate, which improves the compatibility between calcium carbonate and polyethylene matrix, promotes the uniform dispersion of calcium carbonate, and further enhances the mechanical strength of multi-layer composite polyethylene polypropylene waterproof membrane.

[0012] As a further technical solution, the raw materials for the modified calcium carbonate include a modifier and calcium carbonate in a mass ratio of 2~3:30.

[0013] As a further technical solution, the preparation method of the modified calcium carbonate includes the following steps: dispersing the modifier in a solution, adding calcium carbonate, stirring, filtering, and drying to obtain the modified calcium carbonate.

[0014] As a further technical solution, the solution is anhydrous ethanol, and the mass ratio of the solution to the calcium carbonate is 10:1.

[0015] As a further technical solution, the stirring time is 2 hours.

[0016] As a further technical solution, the fluoroalkyl alcohol compound includes one or more of 5-fluoropentan-1-ol, 2-fluoropropan-1-ol, and 10-fluorodecane-1-ol.

[0017] As a further technical solution, the antioxidant includes one or more of antioxidant 1010, antioxidant 168, and antioxidant 1076.

[0018] As a further technical solution, the ultraviolet absorber includes one or more of UV-531, UV-326, and UV-328.

[0019] As a further technical solution, the lubricant includes one or both of stearic acid and calcium stearate.

[0020] As a further technical solution, the plasticizer includes one or both of dioctyl phthalate and dibutyl phthalate.

[0021] As a further technical solution, the first polymer adhesive layer and the second polymer adhesive layer each independently include the following components by weight: 40-60 parts of ethylene-vinyl acetate copolymer, 20-30 parts of tackifying resin, 10-20 parts of paraffin wax, and 0.5-1 part of antioxidant.

[0022] As a further technical solution, the tackifying resin includes one or more of rosin resin, petroleum resin, and coumarone resin.

[0023] As a further technical solution, the antioxidant includes one or more of antioxidant 1010, antioxidant 168, and antioxidant 1076.

[0024] This invention also proposes a method for preparing a multi-layer composite polyethylene-polypropylene waterproof membrane, comprising the following steps:

[0025] S1. Weigh the raw materials of the polyethylene sheet of the specified weight parts, mix, melt, and extrude them, and then hot-press them with polypropylene cloth to obtain a polyethylene polypropylene layer.

[0026] S2. Weigh the polymer adhesive layer raw materials of the specified weight parts, mix and melt them, and then extrude them to obtain the first polymer adhesive layer material and the second polymer adhesive layer material respectively.

[0027] S3. The first polymer adhesive layer material is coated between the first polyethylene polypropylene layer and the second polyethylene polypropylene layer, and between the first polyethylene polypropylene layer and the second isolation layer to form the first polymer adhesive layer; the material of the second polymer layer is coated between the second polyethylene polypropylene layer and the first isolation layer to form the second polymer adhesive layer, thereby obtaining a polyethylene polypropylene waterproof membrane.

[0028] S4. Two or more polyethylene polypropylene waterproof membranes are overlapped in the gaps of the polyethylene polypropylene waterproof membranes according to the insertion method described above, thus forming a multi-layer composite polyethylene polypropylene waterproof membrane.

[0029] As a further technical solution, the preparation method of polypropylene fabric in S1 includes the following steps: melting and spinning polypropylene particles in a spinning machine to form polypropylene fabric.

[0030] As a further technical solution, the overlap width in S4 is 8~10cm, and the overlap position is located on the long side of the polyethylene polypropylene waterproof membrane.

[0031] As a further technical solution, the thickness of the first polymer adhesive layer and the second polymer adhesive layer are each independently 0.1~2mm.

[0032] As a further technical solution, the thickness of the polypropylene fabric is 0.1 mm.

[0033] As a further technical solution, the thickness of the polyethylene sheet is 0.5~0.9mm.

[0034] As a further technical solution, the thickness of the isolation layer is 0.01 mm.

[0035] As a further technical solution, the isolation layer is release paper or release film coated with silicone oil.

[0036] The working principle and beneficial effects of this invention are as follows:

[0037] In this invention, a waterproof membrane is prepared by combining multiple layers of polyethylene polypropylene waterproof material with a polymer adhesive layer. The layers are tightly bonded together, which enhances the overall waterproof performance and mechanical strength of the waterproof membrane. Polyvinyl alcohol fibers with different linear densities are added to the multiple layers of polyethylene polypropylene waterproof material to exert a synergistic effect, enhance the density of the polyethylene polypropylene waterproof material layer, reduce the channels for water penetration, and improve the waterproof performance and mechanical strength of the multi-layer composite polyethylene polypropylene waterproof membrane. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] In the following examples and comparative examples:

[0040] Calcium carbonate: average particle size is 5000 mesh;

[0041] First polyvinyl alcohol fiber: linear density 0.91 g / cm³ 3 The length is 12mm;

[0042] Second type of polyvinyl alcohol fiber: linear density is 1.3 g / cm³ 3 The length is 12mm;

[0043] Polyethylene: High-density polyethylene, model 5000S;

[0044] Ethylene-vinyl acetate copolymer: model number FL 00328, purchased from ExxonMobil Chemical Co., Ltd.;

[0045] Rosin resin: Model 424#;

[0046] Petroleum resin: C9 petroleum resin;

[0047] Coumarone resin: Model C-120;

[0048] First and second isolation layers: release films coated with silicone oil, with a thickness of 0.01 mm;

[0049] First and second polymer adhesive layers: thickness 1mm;

[0050] Polyethylene sheet: 0.6mm thick;

[0051] Polypropylene fabric: 0.1mm thick;

[0052] Polypropylene granules: density 0.9 g / cm³3 Purchased from Dongguan Xinlei Plastics Co., Ltd.

[0053] Example 1

[0054] A method for preparing a multi-layer composite polyethylene-polypropylene waterproof membrane includes the following steps:

[0055] S1. Weigh 80 parts of polyethylene, 5 parts of polyvinyl alcohol fiber, 0.2 parts of antioxidant 1010, 0.1 parts of ultraviolet absorber UV-531, 0.1 parts of stearic acid, and 1 part of dioctyl phthalate. Mix, melt, and extrude to form a polyethylene sheet. Melt and spin polypropylene granules in a spinning machine to form polypropylene cloth. Hot-press the polyethylene sheet and the polypropylene cloth together to obtain a polyethylene polypropylene waterproof material layer. The polyvinyl alcohol fiber is composed of a first polyvinyl alcohol fiber and a second polyvinyl alcohol fiber with a mass ratio of 1:2.

[0056] S2. Weigh 40 parts of ethylene-vinyl acetate copolymer, 20 parts of rosin resin, 10 parts of paraffin wax, and 0.5 parts of antioxidant 1010. Mix, melt, and extrude to obtain the first polymer adhesive layer material and the second polymer adhesive layer material, respectively.

[0057] S3. The first polymer adhesive layer material is coated between the first polyethylene polypropylene layer and the second polyethylene polypropylene layer, and between the first polyethylene polypropylene layer and the second isolation layer to form the first polymer adhesive layer; the material of the second polymer layer is coated between the second polyethylene polypropylene layer and the first isolation layer to form the second polymer adhesive layer, thereby obtaining a polyethylene polypropylene waterproof membrane.

[0058] S4. Two polyethylene polypropylene waterproof membranes are inserted in a plug-in interlocking lap joint structure, overlapping in the gap between the polyethylene polypropylene waterproof membranes. After heating and pressing, cooling, shaping, rolling, and packaging, a multi-layered composite polyethylene polypropylene waterproof membrane is obtained. The overlap width is 8cm, and the overlap edge is the long side edge of the two polyethylene polypropylene waterproof membranes.

[0059] Example 2

[0060] A method for preparing a multi-layer composite polyethylene-polypropylene waterproof membrane includes the following steps:

[0061] S1. Weigh 85 parts of polyethylene, 8 parts of polyvinyl alcohol fiber, 0.4 parts of antioxidant 168, 0.2 parts of ultraviolet absorber UV-326, 0.2 parts of stearic acid, and 2 parts of dioctyl phthalate. Mix, melt, and extrude to form a polyethylene sheet. Melt and spin polypropylene granules in a spinning machine to form a polypropylene filament cloth. Hot-press the polyethylene sheet and the polypropylene filament cloth together to obtain a polyethylene-polypropylene waterproof material layer. The polyvinyl alcohol fiber is composed of a first polyvinyl alcohol fiber and a second polyvinyl alcohol fiber with a mass ratio of 1:2.

[0062] S2. Weigh 50 parts of ethylene-vinyl acetate copolymer, 25 parts of coumarone resin, 15 parts of paraffin wax, and 1680.8 parts of antioxidant. Mix, melt, and extrude to obtain the first polymeric adhesive layer material and the second polymeric adhesive layer material, respectively.

[0063] S3. The first polymer adhesive layer material is coated between the first polyethylene polypropylene layer and the second polyethylene polypropylene layer, and between the first polyethylene polypropylene layer and the second isolation layer to form the first polymer adhesive layer; the material of the second polymer layer is coated between the second polyethylene polypropylene layer and the first isolation layer to form the second polymer adhesive layer, thereby obtaining a polyethylene polypropylene waterproof membrane.

[0064] S4. Two polyethylene polypropylene waterproof membranes are inserted in a plug-in interlocking lap joint structure, overlapping in the gap between the polyethylene polypropylene waterproof membranes. After heating, pressing, cooling, shaping, rolling, and packaging, a multi-layered composite polyethylene polypropylene waterproof membrane is obtained. The overlap width is 9cm, and the overlap edge is the long side edge of the two polyethylene polypropylene waterproof membranes.

[0065] Example 3

[0066] A method for preparing a multi-layer composite polyethylene-polypropylene waterproof membrane includes the following steps:

[0067] S1. Weigh 90 parts of polyethylene, 10 parts of polyvinyl alcohol fiber, 0.5 parts of antioxidant 1076, 0.3 parts of ultraviolet absorber UV-328, 0.3 parts of calcium stearate, and 3 parts of dibutyl phthalate. Mix, melt, and extrude to form a polyethylene sheet. Melt and spin polypropylene granules in a spinning machine to form polypropylene filament cloth. Hot-press the polyethylene sheet and the polypropylene filament cloth together to obtain a polyethylene-polypropylene waterproof material layer. The polyvinyl alcohol fiber is composed of a first polyvinyl alcohol fiber and a second polyvinyl alcohol fiber with a mass ratio of 1:2.

[0068] S2. Weigh 60 parts of ethylene-vinyl acetate copolymer, 30 parts of petroleum resin, 20 parts of paraffin wax, and 1 part of antioxidant 1076. Mix, melt, and extrude to obtain the first polymer adhesive layer material and the second polymer adhesive layer material, respectively.

[0069] S3. The first polymer adhesive layer material is coated between the first polyethylene polypropylene layer and the second polyethylene polypropylene layer, and between the first polyethylene polypropylene layer and the second isolation layer to form the first polymer adhesive layer; the material of the second polymer layer is coated between the second polyethylene polypropylene layer and the first isolation layer to form the second polymer adhesive layer, thereby obtaining a polyethylene polypropylene waterproof membrane.

[0070] S4. Two polyethylene polypropylene waterproof membranes are inserted in a plug-in interlocking lap joint structure, overlapping each other in the gap between the polyethylene polypropylene waterproof membranes. After heating, pressing, cooling, shaping, rolling, and packaging, a multi-layered composite polyethylene polypropylene waterproof membrane is obtained. The overlap width is 10cm, and the overlap edge is the long side edge of the two polyethylene polypropylene waterproof membranes.

[0071] Example 4

[0072] The difference between Example 4 and Example 1 is that the polyvinyl alcohol fiber is composed of a first polyvinyl alcohol fiber and a second polyvinyl alcohol fiber with a mass ratio of 1:3.

[0073] Example 5

[0074] The difference between Example 5 and Example 1 is that the polyvinyl alcohol fiber is composed of a first polyvinyl alcohol fiber and a second polyvinyl alcohol fiber with a mass ratio of 1:4.

[0075] Example 6

[0076] The difference between Example 6 and Example 1 is that the polyvinyl alcohol fiber is composed of a first polyvinyl alcohol fiber and a second polyvinyl alcohol fiber with a mass ratio of 1:5.

[0077] Example 7

[0078] The difference between Example 7 and Example 5 is that the raw material for the polyethylene sheet also includes 10 parts of calcium carbonate.

[0079] Example 8

[0080] The difference between Example 8 and Example 5 is that the raw material for the polyethylene sheet also includes 12.5 parts of calcium carbonate.

[0081] Example 9

[0082] The preparation method of modified calcium carbonate includes the following steps: 2 parts of 2-fluoropropane-1-ol are dispersed in 200 parts of anhydrous ethanol, 20 parts of calcium carbonate are added, and after stirring for 2 hours, the mixture is filtered and dried to obtain modified calcium carbonate.

[0083] The difference between Example 9 and Example 8 is that calcium carbonate is replaced with modified calcium carbonate obtained by the above preparation method.

[0084] Example 10

[0085] The difference between Example 10 and Example 9 is that the amount of 2-fluoropropane-1-ol added is 3 parts.

[0086] Example 11

[0087] The difference between Example 11 and Example 10 is that 2-fluoropropane-1-ol is replaced with an equal amount of 5-fluoropentane-1-ol.

[0088] Example 12

[0089] The difference between Example 12 and Example 10 is that 2-fluoropropane-1-ol is replaced with an equal amount of 10-fluorodecane-1-ol.

[0090] Comparative Example 1

[0091] The difference between Comparative Example 1 and Example 1 is that the polyvinyl alcohol fiber is a first polyvinyl alcohol fiber.

[0092] Comparative Example 2

[0093] The difference between Comparative Example 2 and Example 1 is that the polyvinyl alcohol fiber is a second polyvinyl alcohol fiber.

[0094] Comparative Example 3

[0095] The difference between Comparative Example 3 and Example 5 is that polyvinyl alcohol fibers were replaced with an equal amount of calcium carbonate.

[0096] The multi-layer composite polyethylene-polypropylene waterproof membranes prepared in Examples 1-12 and Comparative Examples 1-3 were tested according to the following methods:

[0097] 1. Impermeability: The impermeability of the sample was tested according to the test method specified in GB / T 23457-2017 "Pre-laid Waterproof Membrane". The test conditions were: 0.6MPa, 120min.

[0098] 2. Tensile strength: The tensile strength of the sample shall be tested in accordance with the test methods specified in GB 18173.1-2012 "Polymer Waterproof Materials Part 1: Sheets".

[0099] 3. Tear strength: The tear strength of the sample shall be tested in accordance with the test method specified in GB 18173.1-2012 "Polymer Waterproof Materials Part 1: Sheets".

[0100] The test results are shown in the table below:

[0101] Table 1 Performance test results of the single-layer polyethylene polypropylene waterproof membrane prepared in Example 11

[0102]

[0103] Table 2 Performance test results of the multi-layer composite polyethylene polypropylene waterproof membranes prepared in Examples 1-12 and Comparative Examples 1-3

[0104]

[0105] Compared with Comparative Examples 1 and 2, Example 1 simultaneously added first polyvinyl alcohol fiber and second polyvinyl alcohol fiber. As a result, the impermeability, tensile strength and tear strength of Example 1 were better than those of Comparative Examples 1 and 2, indicating that the first polyvinyl alcohol fiber and the second polyvinyl alcohol fiber played a synergistic role, which can improve the waterproof performance and mechanical strength of the multi-layer composite polyethylene polypropylene waterproof membrane.

[0106] Compared with Example 1, Examples 4-6 added first polyvinyl alcohol fiber and second polyvinyl alcohol fiber in different mass ratios. The results showed that the tensile strength and tear strength of Examples 4 and 5 were better than those of Examples 1 and 6, indicating that when the mass ratio of first polyvinyl alcohol fiber and second polyvinyl alcohol fiber is 1:3-4, the mechanical strength of multi-layer composite polyethylene polypropylene waterproof membrane can be further improved.

[0107] Compared with Example 5 and Comparative Example 3, Examples 7 and 8 simultaneously added polyvinyl alcohol fiber and calcium carbonate. As a result, the tensile strength and tear strength of Examples 7 and 8 were better than those of Examples 5 and Comparative Example 3, indicating that polyvinyl alcohol fiber and calcium carbonate have a synergistic effect and can further improve the mechanical strength of multi-layer composite polyethylene polypropylene waterproof membrane.

[0108] Compared with Example 8, Examples 9-12 added modified calcium carbonate, and the tensile strength and tear strength of Examples 9-12 were better than those of Example 8, indicating that the mechanical strength of the multi-layer composite polyethylene polypropylene waterproof membrane was higher when modified calcium carbonate was added.

[0109] In Examples 10-12, different types of modifiers were added. As a result, the tensile strength and tear strength of Example 11 were better than those of Examples 10 and 12, indicating that when the modifier is 5-fluoropentan-1-ol, the mechanical strength of the multi-layer composite polyethylene polypropylene waterproof membrane can be further improved.

[0110] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-pass composite polyethylene-polypropylene waterproofing membrane, characterized in that, The polyethylene polypropylene waterproof roll is composed of a plurality of polyethylene polypropylene waterproof rolls, one side of the polyethylene polypropylene waterproof roll has an insertion gap for the insertion of part of another polyethylene polypropylene waterproof roll; the polyethylene polypropylene waterproof roll comprises, from top to bottom, a first polyethylene polypropylene layer, a first high polymer glue layer, a second polyethylene polypropylene layer, a second high polymer glue layer, and a first isolation layer, and further comprises a second isolation layer, the insertion gap is arranged between the first high polymer glue layer and the second polyethylene polypropylene layer, the second isolation layer is arranged on the lower surface of the first high polymer glue layer in the insertion gap, the first polyethylene polypropylene layer and the second polyethylene polypropylene layer are each composed of a polyethylene sheet layer and a polypropylene cloth; the polyethylene sheet layer comprises the following raw materials in parts by weight: 80-90 parts of polyethylene, 5-10 parts of polyvinyl alcohol fiber, 0.2-0.5 parts of antioxidant, 0.1-0.3 parts of ultraviolet absorber, 0.1-0.3 parts of lubricant, and 1-3 parts of plasticizer; the polyvinyl alcohol fiber is composed of first polyvinyl alcohol fiber and second polyvinyl alcohol fiber, and the linear densities of the first polyvinyl alcohol fiber and the second polyvinyl alcohol fiber are different. The linear density of the first polyvinyl alcohol fiber is 0.91 g / cm 3 The linear density of the second polyvinyl alcohol fiber is 1.3 g / cm 3 The mass ratio of the first polyvinyl alcohol fiber and the second polyvinyl alcohol fiber is 1:3~4.

2. The multi-lane composite polyethylene-polypropylene waterproofing membrane according to claim 1, characterized in that, The raw materials of the polyethylene sheet layer further comprise calcium carbonate, and the mass ratio of the polyvinyl alcohol fiber to the calcium carbonate is 2:4-5.

3. The multi-lane composite polyethylene-polypropylene waterproofing membrane according to claim 2, characterized in that, The calcium carbonate is modified calcium carbonate, which is obtained by modifying calcium carbonate with a modifier, and the modifier is a fluoroalkyl alcohol compound.

4. The multi-lane composite polyethylene-polypropylene waterproofing membrane according to claim 3, characterized in that, The raw materials of the modified calcium carbonate comprise the modifier and the calcium carbonate in a mass ratio of 2-3:

30.

5. The multi-lane composite polyethylene-polypropylene waterproofing membrane according to claim 3, characterized in that, The fluoroalkyl alcohol compound comprises one or more of 5-fluoropentane-1-ol, 2-fluoropropane-1-ol, and 10-fluorodecane-1-ol.

6. The multi-lane composite polyethylene-polypropylene waterproofing membrane according to claim 1, characterized in that, Further comprising at least one of the following technical features: The antioxidant comprises one or more of antioxidant 1010, antioxidant 168, and antioxidant 1076; The ultraviolet absorber comprises one or more of UV-531, UV-326, and UV-328; The lubricant comprises one or both of stearic acid and calcium stearate; The plasticizer comprises one or both of dioctyl phthalate and dibutyl phthalate.

7. The multi-lane composite polyethylene-polypropylene waterproofing membrane according to claim 1, characterized in that, The first high polymer glue layer and the second high polymer glue layer each independently comprise the following raw materials in parts by weight: 40-60 parts of ethylene-vinyl acetate copolymer, 20-30 parts of tackifying resin, 10-20 parts of paraffin wax, and 0.5-1 part of antioxidant.

8. The multi-lane composite polyethylene-polypropylene waterproofing membrane according to claim 7, characterized in that, The tackifying resin comprises one or more of rosin resin, petroleum resin, and coumarone resin.

9. The method according to any one of claims 1 to 8, wherein the method is characterized by, The method comprises the following steps: S1, weighing the raw materials of the polyethylene sheet layer in parts by weight, mixing, melting, and extruding, and then hot-pressing and compounding with polypropylene cloth to obtain a polyethylene polypropylene layer; S2, weighing the raw materials of the high polymer glue layer in parts by weight, mixing and melting, and then extruding to form a first high polymer glue layer material and a second high polymer glue layer material, respectively; S3, coating the first high polymer glue layer material between the first polyethylene polypropylene layer and the second polyethylene polypropylene layer, between the first polyethylene polypropylene layer and the second isolation layer, forming a first high polymer glue layer; coating the second high polymer layer material between the second polyethylene polypropylene layer and the first isolation layer, forming a second high polymer glue layer, obtaining a polyethylene polypropylene waterproof coiled material; S4, a plurality of polyethylene polypropylene waterproof coiled materials are overlapped according to the insertion mode in the gap of the polyethylene polypropylene waterproof coiled material, and a multi-channel composite polyethylene polypropylene waterproof coiled material is obtained.

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