Root-puncture-resistant double-lap-joint double-polymeric-membrane-based waterproof roll material and preparation method therefor

Abstract

The present invention relates to the technical field of waterproof roll materials, and provides a root-puncture-resistant double-lap-joint double-polymeric-membrane-based waterproof roll material and a preparation method therefor. The waterproof roll material comprises an anti-sticking layer, a first adhesive layer, a first polymeric membrane base layer, a second adhesive layer, a second polymeric membrane base layer, a third adhesive layer and an isolating membrane, which are sequentially arranged from top to bottom, wherein the first polymeric membrane base layer and the second polymeric membrane base layer each independently comprise the following components: polyethylene terephthalate, polypropylene, magnesium silicate and an anti-aging agent; and the first adhesive layer, the second adhesive layer and the third adhesive layer each independently comprise the following components: asphalt, an ethylene-vinyl acetate copolymer, a styrene-butadiene-styrene copolymer, a tackifier and a root inhibitor, the tackifier comprising sodium polyacrylate and manganese dioxide. By means of the technical solution, the problem of relatively poor resistance to root puncture of a waterproof roll material in the prior art is solved.

Description

Root-penetration-resistant double-lap double-polymer membrane-based waterproofing coiled material and preparation method thereof Technical Field

[0001] The present invention relates to the technical field of waterproof coiled materials, and in particular to a root penetration resistant double-lap double polymer membrane based waterproof coiled material and a preparation method thereof. Background Art

[0002] Waterproofing membranes are used on building walls and roofs to prevent rainwater and groundwater from seeping in. They are the first line of defense for waterproofing a building and play a crucial role in the overall project. With the continued expansion of urban development, creating gardens and planting green plants such as flowers on rooftops has become a primary means of purifying the air and improving the environment.

[0003] Plant roots grow rapidly and easily penetrate waterproofing membranes, leading to roof leaks and, in severe cases, even structural damage to buildings, resulting in safety and quality issues. Existing waterproofing membranes, due to their simple formulas and structures, lack the ability to form a root system and resist plant root penetration. Therefore, developing a waterproofing membrane that is resistant to root penetration is of great practical significance and commercial value.

[0004] Summary of the Invention

[0005] The present invention provides a root-penetration-resistant double-lap double-polymer membrane-based waterproofing coiled material and a preparation method thereof, which solves the problem of poor root-penetration-resistant performance of waterproofing coiled materials in related technologies.

[0006] The technical solutions of the present invention are as follows:

[0007] The present invention provides a root penetration resistant double-lap double polymer membrane-based waterproofing membrane, comprising an anti-adhesion layer, a first adhesive layer, a first polymer membrane base layer, a second adhesive layer, a second polymer membrane base layer, a third adhesive layer and a separator, which are arranged in sequence from top to bottom. The first polymer membrane base layer and the second polymer membrane base layer each independently comprise the following components in parts by weight: 60 to 80 parts of polyethylene terephthalate, 40 to 60 parts of polypropylene, 15 to 30 parts of magnesium silicate, and 1 to 3 parts of an antioxidant.

[0008] The first adhesive layer, the second adhesive layer and the third adhesive layer each independently comprise the following components in parts by weight: 40-60 parts of asphalt, 30-40 parts of ethylene-vinyl acetate copolymer, 20-30 parts of styrene-butadiene-styrene copolymer, 5-10 parts of tackifier, and 1-3 parts of root inhibitor;

[0009] The viscosity increasing agent includes sodium polyacrylate and manganese dioxide.

[0010] As a further technical solution, the mass ratio of the sodium polyacrylate to manganese dioxide is 1:4 to 4:1.

[0011] When the mass ratio of sodium polyacrylate to manganese dioxide is 1:4 to 4:1, the puncture resistance and root penetration resistance of the waterproof membrane can be further enhanced.

[0012] As a further technical solution, the mass ratio of the sodium polyacrylate to manganese dioxide is 2:3.

[0013] When the mass ratio of sodium polyacrylate and manganese dioxide is 2:3, the waterproof membrane has better puncture resistance and root penetration resistance.

[0014] As a further technical solution, the magnesium silicate is polyvinyl acetate modified magnesium silicate.

[0015] By modifying magnesium silicate with polyvinyl acetate, it helps to increase the dispersion effect of magnesium silicate in the polymer membrane base, thereby further enhancing the puncture resistance and root penetration resistance of the waterproof membrane.

[0016] As a further technical solution, in the polyvinyl acetate modified magnesium silicate, the mass ratio of polyvinyl acetate to magnesium silicate is 2:13 to 4:11.

[0017] In polyvinyl acetate modified magnesium silicate, when the mass ratio of polyvinyl acetate to magnesium silicate is 2:13 to 4:11, the puncture resistance and root penetration resistance of the waterproof membrane can be further enhanced.

[0018] As a further technical solution, the preparation method of the polyvinyl acetate modified magnesium silicate is: dissolving polyvinyl acetate in acetone, adding magnesium silicate, mixing evenly, and drying to obtain the polyvinyl acetate modified magnesium silicate.

[0019] As a further technical solution, the antioxidant is one or more of antioxidant 4010, antioxidant DPPD, and antioxidant IPPD.

[0020] As a further technical solution, the root inhibitor is B2 root inhibitor or B5 root inhibitor.

[0021] As a further technical solution, the isolation film is one of polyvinyl chloride film, polyethylene film, and polypropylene film.

[0022] As a further technical solution, the anti-sticking layer is a polyethylene film or a polypropylene film.

[0023] The present invention also provides a method for preparing the root penetration resistant double-lap double polymer membrane-based waterproofing membrane, comprising the following steps:

[0024] S1, mixing and extruding the components of the first polymer film base layer for the first time to obtain a first polymer film base layer sheet, and mixing and extruding the components of the second polymer film base layer for the second time to obtain a second polymer film base layer sheet;

[0025] S2. After softening the asphalt, add ethylene-vinyl acetate copolymer, styrene-butadiene-styrene copolymer, tackifier and root inhibitor and mix them evenly to obtain an adhesive;

[0026] S3. Spray the adhesive on the surfaces of the first polymer film base sheet and the second polymer film base sheet in the upper and lower order of the first adhesive layer, the first polymer film base layer, the second adhesive layer, the second polymer film base layer and the third adhesive layer. Cover the upper surface of the first adhesive layer with a release layer and the lower surface of the third adhesive layer with an isolation film to obtain a double-lap double polymer film-based waterproof membrane.

[0027] As a further technical solution, in step S1, during the first co-extrusion and the second co-extrusion, the extrusion temperatures are independently: 170-180°C in zone 1, 190-200°C in zone 2, and 210-220°C in zone 3.

[0028] As a further technical solution, in step S2, the temperature of the asphalt when softening is 180-190°C.

[0029] The working principle and beneficial effects of the present invention are:

[0030] 1. In this invention, the adhesive layer tackifier comprises sodium polyacrylate and manganese dioxide. Through organic and inorganic synergy, it enhances the adhesive layer's bonding strength, thereby improving the waterproof membrane's puncture resistance and root penetration resistance. Furthermore, the addition of magnesium silicate to the polymer membrane base layer improves the waterproof membrane's mechanical properties and enhances its physical barrier effect, thereby enhancing its puncture resistance and root penetration resistance. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0032] In the following examples and comparative examples, unless otherwise specified, the model of polyethylene terephthalate is RE5329, the model of styrene-butadiene-styrene copolymer is JH-7546, the model of polypropylene is HX-3700, the particle size of magnesium silicate is 45 μm, the model of polyvinyl acetate is LA-5T, the model of asphalt is 90# asphalt, the model of ethylene-vinyl acetate copolymer is BJ-806H, the molecular weight of sodium polyacrylate is 5000, the particle size of manganese dioxide is 13 μm, the thickness of the polyethylene film is 0.15 mm, and the thickness of the polypropylene film is 0.15 mm.

[0033] Example 1

[0034] The preparation method of the root penetration resistant double-lap double polymer membrane-based waterproofing membrane comprises the following steps:

[0035] S1. By weight, 60 parts of polyethylene terephthalate, 40 parts of polypropylene, 15 parts of magnesium silicate, and 1 part of antioxidant 4010 are blended and extruded to obtain a first polymer film base sheet, and 60 parts of polyethylene terephthalate, 40 parts of polypropylene, 15 parts of magnesium silicate, and 1 part of antioxidant 4010 are blended and extruded to obtain a second polymer film base sheet;

[0036] Among them, during the first blending extrusion, the temperature of zone 1 is 170°C, the temperature of zone 2 is 190°C, and the temperature of zone 3 is 210°C; during the second blending extrusion, the temperature of zone 1 is 170°C, the temperature of zone 2 is 190°C, and the temperature of zone 3 is 210°C;

[0037] S2. After softening 40 parts of asphalt at 180° C., add 30 parts of ethylene-vinyl acetate copolymer, 20 parts of styrene-butadiene-styrene copolymer, 0.5 parts of sodium polyacrylate, 4.5 parts of manganese dioxide, and 1 part of B2 root inhibitor and mix well to obtain an adhesive;

[0038] S3. Spray the adhesive on the surface of the first polymer film base sheet and the second polymer film base sheet in the upper and lower order of the first adhesive layer, the first polymer film base, the second adhesive layer, the second polymer film base and the third adhesive layer. Cover the upper surface of the first adhesive layer with a polyethylene film and the lower surface of the third adhesive layer with a polypropylene film to obtain a double-lap double polymer film-based waterproof membrane.

[0039] Example 2

[0040] The preparation method of the root penetration resistant double-lap double polymer membrane-based waterproofing membrane comprises the following steps:

[0041] S1. By weight, 80 parts of polyethylene terephthalate, 60 parts of polypropylene, 30 parts of magnesium silicate, and 3 parts of antioxidant 4010 are blended and extruded to obtain a first polymer film base sheet, and 80 parts of polyethylene terephthalate, 60 parts of polypropylene, 30 parts of magnesium silicate, and 3 parts of antioxidant 4010 are blended and extruded to obtain a second polymer film base sheet;

[0042] Among them, during the first blending extrusion, the temperature of zone 1 is 180°C, the temperature of zone 2 is 200°C, and the temperature of zone 3 is 220°C; during the second blending extrusion, the temperature of zone 1 is 180°C, the temperature of zone 2 is 200°C, and the temperature of zone 3 is 220°C;

[0043] S2. After softening 60 parts of asphalt at 190° C., add 40 parts of ethylene-vinyl acetate copolymer, 30 parts of styrene-butadiene-styrene copolymer, 1 part of sodium polyacrylate, 9 parts of manganese dioxide, and 3 parts of B2 root inhibitor and mix well to obtain an adhesive;

[0044] S3. Spray the adhesive on the surface of the first polymer film base sheet and the second polymer film base sheet in the upper and lower order of the first adhesive layer, the first polymer film base, the second adhesive layer, the second polymer film base and the third adhesive layer. Cover the upper surface of the first adhesive layer with a polyethylene film and the lower surface of the third adhesive layer with a polypropylene film to obtain a double-lap double polymer film-based waterproof membrane.

[0045] Example 3

[0046] The only difference between this embodiment and embodiment 2 is that, in this embodiment, the weight portion of sodium polyacrylate is 9 parts, and the weight portion of manganese dioxide is 1 part.

[0047] Example 4

[0048] The only difference between this embodiment and embodiment 2 is that, in this embodiment, the weight portion of sodium polyacrylate is 2 parts, and the weight portion of manganese dioxide is 8 parts.

[0049] Example 5

[0050] The only difference between this embodiment and embodiment 2 is that, in this embodiment, the weight portion of sodium polyacrylate is 8 parts, and the weight portion of manganese dioxide is 2 parts.

[0051] Example 6

[0052] The only difference between this embodiment and embodiment 2 is that, in this embodiment, the weight parts of sodium polyacrylate are 4 parts, and the weight parts of manganese dioxide are 6 parts.

[0053] Example 7

[0054] The only difference between this embodiment and Example 6 is that in this embodiment, the magnesium silicate is polyvinyl acetate-modified magnesium silicate. The preparation method of polyvinyl acetate-modified magnesium silicate is as follows: dissolving 3 parts of polyvinyl acetate in 20 parts of acetone, adding 27 parts of magnesium silicate, mixing evenly, and drying to obtain polyvinyl acetate-modified magnesium silicate.

[0055] Example 8

[0056] The only difference between this embodiment and embodiment 7 is that, in this embodiment, the weight parts of polyvinyl acetate are 9 parts, and the weight parts of magnesium silicate are 21 parts.

[0057] Example 9

[0058] The only difference between this embodiment and embodiment 7 is that, in this embodiment, the weight portion of polyvinyl acetate is 4 parts, and the weight portion of magnesium silicate is 26 parts.

[0059] Example 10

[0060] The only difference between this embodiment and embodiment 7 is that, in this embodiment, the weight parts of polyvinyl acetate are 8 parts, and the weight parts of magnesium silicate are 22 parts.

[0061] Comparative Example 1

[0062] The only difference between this comparative example and Example 1 is that in this comparative example, magnesium silicate is not added.

[0063] Comparative Example 2

[0064] The only difference between this comparative example and Example 1 is that in this comparative example, sodium polyacrylate is not added and the weight portion of manganese dioxide added is 5 parts.

[0065] Comparative Example 3

[0066] The only difference between this comparative example and Example 1 is that in this comparative example, no manganese dioxide is added and the weight portion of sodium polyacrylate added is 5 parts.

[0067] Comparative Example 4

[0068] The only difference between this comparative example and Example 1 is that in this comparative example, manganese dioxide and sodium polyacrylate were not added.

[0069] Experimental Example 1 Puncture Resistance

[0070] The double-lapped double polymer membrane-based waterproof membranes prepared in Examples 1 to 10 and Comparative Examples 1 to 4 were tested for puncture resistance in accordance with GB / T 23457-2017 “Pre-laid Waterproof Membrane,” and the test results are shown in Table 1 below.

[0071] Table 1 Puncture resistance test results

[0072] Comparison of Example 1 and Comparative Example 1 shows that the addition of magnesium silicate to the polymer membrane base layer can improve the puncture resistance of the waterproof membrane. Comparison of Example 1 and Comparative Examples 2-4 shows that the synergistic effect of sodium polyacrylate and manganese dioxide improves the puncture resistance of the waterproof membrane. Comparison of Examples 2-3 and Examples 4-6 shows that a mass ratio of sodium polyacrylate to manganese dioxide of 1:4 to 4:1 further improves the puncture resistance of the waterproof membrane. Comparison of Example 6 and Examples 4-5 shows that a mass ratio of sodium polyacrylate to manganese dioxide of 2:3 results in even better puncture resistance. Comparison of Example 6 and Examples 7-10 shows that modifying magnesium silicate with polyvinyl acetate further improves the puncture resistance of the waterproof membrane. Comparison of Examples 9-10 and Examples 7-8 shows that a mass ratio of polyvinyl acetate to magnesium silicate of 2:13 to 4:11 further improves the puncture resistance of the waterproof membrane.

[0073] Experimental Example 2 Root penetration resistance

[0074] The double-lapped double polymer membrane-based waterproof membranes prepared in Examples 1 to 10 were tested for root penetration resistance according to GB / T 35468-2017 "Root penetration-resistant waterproof membranes for planted roofs". The test period was 6 months, and the test results are shown in Table 2 below.

[0075] Table 2 Root penetration resistance test results

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A root penetration resistant double-lap double polymer membrane-based waterproofing membrane, comprising, arranged from top to bottom in sequence, an anti-adhesion layer, a first adhesive layer, a first polymer membrane base layer, a second adhesive layer, a second polymer membrane base layer, a third adhesive layer and a separator, characterized in that: The first polymer film base layer and the second polymer film base layer each independently comprise the following components in parts by weight: 60-80 parts of polyethylene terephthalate, 40-60 parts of polypropylene, 15-30 parts of magnesium silicate, and 1-3 parts of an antioxidant; The first adhesive layer, the second adhesive layer and the third adhesive layer each independently comprise the following components in parts by weight: 40-60 parts of asphalt, 30-40 parts of ethylene-vinyl acetate copolymer, 20-30 parts of styrene-butadiene-styrene copolymer, 5-10 parts of tackifier, and 1-3 parts of root inhibitor; The viscosity increasing agent includes sodium polyacrylate and manganese dioxide.

2. The root penetration resistant double overlap double polymer membrane based waterproofing membrane according to claim 1, characterized in that: The mass ratio of the sodium polyacrylate to manganese dioxide is 1:4 to 4:

1.

3. The root penetration resistant double overlap double polymer membrane based waterproofing membrane according to claim 2, characterized in that: The mass ratio of the sodium polyacrylate to manganese dioxide is 2:

3.

4. The root penetration resistant double overlap double polymer membrane based waterproofing membrane according to claim 1, characterized in that: The magnesium silicate is polyvinyl acetate modified magnesium silicate.

5. The root penetration resistant double overlap double polymer membrane based waterproofing membrane according to claim 4, characterized in that: In the polyvinyl acetate modified magnesium silicate, the mass ratio of polyvinyl acetate to magnesium silicate is 2:13 to 4:

11.

6. The root penetration resistant double overlap double polymer membrane based waterproofing membrane according to claim 4, characterized in that: The preparation method of the polyvinyl acetate modified magnesium silicate is as follows: dissolving polyvinyl acetate in acetone, adding magnesium silicate, mixing evenly, and drying to obtain the polyvinyl acetate modified magnesium silicate.

7. The root penetration resistant double overlap double polymer membrane based waterproofing membrane according to claim 1, characterized in that: The antioxidant is one or more of antioxidant 4010, antioxidant DPPD, and antioxidant IPPD.

8. The root penetration resistant double overlap double polymer membrane based waterproofing membrane according to claim 1, characterized in that: The root inhibitor is B2 root inhibitor or B5 root inhibitor.

9. A method for preparing the root penetration resistant double overlap double polymer membrane-based waterproofing membrane according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, mixing and extruding the components of the first polymer film base layer for the first time to obtain a first polymer film base layer sheet, and mixing and extruding the components of the second polymer film base layer for the second time to obtain a second polymer film base layer sheet; S2. After softening the asphalt, add ethylene-vinyl acetate copolymer, styrene-butadiene-styrene copolymer, tackifier and root inhibitor and mix them evenly to obtain an adhesive; S3, spraying the adhesive on the surfaces of the first polymer film base sheet and the second polymer film base sheet in the order of the first adhesive layer, the first polymer film base sheet, the second adhesive layer, the second polymer film base sheet and the third adhesive layer. After the upper surface of the first adhesive layer is covered with the anti-adhesion layer and the lower surface of the third adhesive layer is covered with the isolation film, a double-lapped double polymer film-based waterproof membrane is obtained.

10. The method for preparing a root penetration resistant double overlap double polymer membrane based waterproofing coiled material according to claim 9, characterized in that: In step S1, during the first co-extrusion and the second co-extrusion, the extrusion temperatures are independently: 170-180°C in the first zone, 190-200°C in the second zone, and 210-220°C in the third zone.

Images