Occlusion type lap joint prefabricated polymer waterproof coiled material and preparation method thereof

Abstract

The invention relates to the technical field of waterproof coiled materials, and provides an occlusion type lap joint prefabricated high-molecular waterproof coiled material and a preparation method thereof.The occlusion type lap joint prefabricated high-molecular waterproof coiled material sequentially comprises a cloth base material layer, an upper waterproof layer, a tire base layer, a lower waterproof layer and a first isolating membrane layer from top to bottom; the upper waterproof layer and the lower waterproof layer are respectively and independently prepared from the following components in parts by weight: 50 to 65 parts of polyolefin, 10 to 20 parts of metallocene polyolefin, 30 to 35 parts of ethylene propylene diene monomer, 30 to 45 parts of talcum powder, 30 to 40 parts of flame retardant, 1 to 3 parts of antioxidant, 0.5 to 1.5 parts of ultraviolet light absorber, 4 to 6 parts of pigment and 1 to 3 parts of compatilizer. According to the technical scheme, the problems of poor tensile property and poor aging resistance of the occlusion type lap joint prefabricated polymer waterproof coiled material in the related technology are solved.

Description

Technical Field

[0001] The invention relates to the technical field of waterproof coiled materials, and in particular to an interlocking overlap prefabricated polymer waterproof coiled material and a preparation method thereof. Background Art

[0002] As a key material in building waterproofing projects, waterproof membranes can build a continuous waterproof barrier on the building surface with their excellent impermeability, effectively resisting water penetration, thereby protecting the building structure from water damage and laying a solid waterproof foundation for various projects. The uniqueness of the bite-type overlap prefabricated polymer waterproof membrane lies in the use of bite-type double overlap technology. This technology ensures the tightness of the overlap edge of the membrane, fundamentally avoiding the occurrence of water seepage, and significantly reducing the risk of leakage caused by loose overlap.

[0003] However, it is worth noting that the traditional interlocking overlapped double polymer membrane-based waterproofing membrane still has limitations in performance, especially in terms of tensile performance and aging resistance, which directly limits its service life and long-term protective effect. Therefore, the development of an interlocking overlapped prefabricated polymer waterproofing membrane with good tensile performance and aging resistance is of great significance to improving the overall quality and durability of building waterproofing projects. Summary of the invention

[0004] The invention provides an interlocking overlap prefabricated polymer waterproofing coiled material and a preparation method thereof, which solves the problems of poor tensile performance and poor aging resistance of the interlocking overlap prefabricated polymer waterproofing coiled material in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides an interlocking overlap prefabricated polymer waterproofing coiled material, which comprises, from top to bottom, a cloth-based material layer, an upper waterproof layer, a base layer, a lower waterproof layer and a first insulating film layer, an overlap opening is provided on one side of the polymer waterproofing coiled material, the overlap opening is formed by separating the upper waterproof layer and the lower waterproof layer, a second insulating film layer is provided on the upper surface of the overlap opening, a third insulating film layer is provided on the lower surface of the overlap opening, and a fourth insulating film layer is provided on the upper surface of the other side of the cloth-based material layer away from the overlap opening; The upper waterproof layer and the lower waterproof layer each independently comprise the following components in parts by weight: 50-65 parts of polyolefin, 10-20 parts of metallocene polyolefin, 30-35 parts of EPDM rubber, 30-45 parts of talc, 30-40 parts of flame retardant, 1-3 parts of antioxidant, 0.5-1.5 parts of ultraviolet absorber, 4-6 parts of pigment, 1-3 parts of compatibilizer; The metallocene polyolefin includes metallocene polyethylene and metallocene polypropylene, and the weight ratio of the metallocene polyethylene to the metallocene polypropylene is 1:19-19:1.

[0006] As a further technical solution, the weight ratio of the metallocene polyethylene to the metallocene polypropylene is 2-5:1.

[0007] When the weight ratio of metallocene polyethylene to metallocene polypropylene is 2-5:1, the tensile properties and aging resistance of the interlocking lap prefabricated polymer waterproof membrane can be further improved.

[0008] As a further technical solution, the talcum powder is modified talcum powder, and the raw materials of the modified talcum powder include talcum powder, 2-hydroxy-3-naphthoic acid and polyvinyl pyrrolidone.

[0009] Surface modification of talc using 2-hydroxy-3-naphthoic acid and polyvinylpyrrolidone can make the talc inorganic filler dispersed more evenly in the polyolefin organic matrix, making the organic and inorganic components more closely combined, thereby further improving the tensile properties and aging resistance of the interlocking lap prefabricated polymer waterproof membrane.

[0010] As a further technical solution, the weight ratio of talc, 2-hydroxy-3-naphthoic acid and polyvinyl pyrrolidone is 8-18:1:1.

[0011] When the weight ratio of talc, 2-hydroxy-3-naphthoic acid and polyvinyl pyrrolidone is 8-18:1:1, the tensile properties and aging resistance of the interlocking lap prefabricated polymer waterproof membrane can be further improved.

[0012] As a further technical solution, the preparation method of the modified talcum powder comprises the following steps: A1, dissolving the 2-hydroxy-3-naphthoic acid in ethanol to obtain a 2-hydroxy-3-naphthoic acid solution, adding the talcum powder to the 2-hydroxy-3-naphthoic acid solution, dispersing evenly, and drying to obtain 2-hydroxy-3-naphthoic acid modified talcum powder; A2, dissolving the polyvinyl pyrrolidone in water to obtain a polyvinyl pyrrolidone solution, adding the 2-hydroxy-3-naphthoic acid modified talc to the polyvinyl pyrrolidone solution, dispersing evenly, and drying to obtain modified talc.

[0013] As a further technical solution, the mass fraction of the 2-hydroxy-3-naphthoic acid solution is 5% to 10%; the mass fraction of the polyvinyl pyrrolidone solution is 4% to 8%.

[0014] As a further technical solution, the cloth base material of the cloth base material layer is one of polypropylene cloth, polyester cloth, polyester cloth, glass fiber cloth, and various types of non-woven fabrics.

[0015] As a further technical solution, the tire base layer is long-fiber reinforced polyester felt.

[0016] As a further technical solution, the first isolation film layer, the second isolation film layer, the third isolation film layer and the fourth isolation film layer are each independently a PE film.

[0017] As a further technical solution, the polyolefin is one or both of polyethylene and polypropylene; the flame retardant is one or both of magnesium hydroxide and aluminum hydroxide; the antioxidant is one or more of antioxidant 1010, antioxidant 168, and antioxidant 1098; the ultraviolet absorber is one or more of Tinuvin 234, Tinuvin 328, and Tinuvin 622; the pigment is one or both of titanium dioxide and zinc oxide; and the compatibilizer is one or both of PE-g-MAH and PP-g-MAH.

[0018] As a further technical solution, the thickness of the upper waterproof layer and the lower waterproof layer are independently 1.2-1.5 mm; the thickness of the tread base layer is 1.0-1.2 mm; and the thickness of the cloth-based material layer is 0.4-0.6 mm.

[0019] The present invention also provides a method for preparing the aforementioned interlocking overlap prefabricated polymer waterproofing membrane, comprising the following steps: S1, mixing the components of the upper waterproof layer in parts by weight uniformly, and extruding to obtain an upper waterproof layer sheet; S2, mixing the components of the lower waterproof layer in parts by weight uniformly, and extruding to obtain a lower waterproof layer sheet; S3, covering the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the tire base layer respectively, and rolling forming, to obtain the upper waterproof layer and the lower waterproof layer respectively covering the upper and lower sides of the tire base layer; S4, laying a cloth-based material layer on the upper surface of the upper waterproof layer, and laying a first isolation membrane layer on the lower surface of the lower waterproof layer, to obtain a cloth-based material layer laid on the upper surface of the upper waterproof layer and a first isolation membrane layer laid on the lower surface of the lower waterproof layer; S5. An overlapping opening is provided on one side of the polymer waterproof membrane, and the overlapping opening is formed by separating the upper waterproof layer and the lower waterproof layer. The second isolation membrane layer is arranged on the upper surface of the overlapping opening, the third isolation membrane layer is arranged on the lower surface of the overlapping opening, and the fourth isolation membrane layer is arranged on the upper surface of the other side of the cloth-based material layer away from the overlapping opening, so as to obtain a bite-type overlapping prefabricated polymer waterproof membrane.

[0020] As a further technical solution, in steps S1 and S2, the temperature during extrusion is 160-180°C.

[0021] The present invention also proposes a construction process for a bite-type overlap prefabricated polymer waterproofing membrane, which is constructed by a self-adhesive overlap method. The self-adhesive overlap method comprises the following steps: laying a first bite-type overlap prefabricated polymer waterproofing membrane on a base layer according to design requirements, and providing an upper waterproof layer and a lower waterproof layer on one side of the overlap opening, and an upper edge layer of the membrane respectively located on the upper side of the cloth base material layer on the side of the adjacent bite-type overlap prefabricated polymer waterproofing membrane without an overlap opening and on the lower side of the lower waterproof layer, with an overlap width of 60 to 10 0mm, forming an interlocking overlap structure, and fully aligning it, the second insulating film layer of the first interlocking overlap prefabricated polymer waterproof membrane and the fourth insulating film layer on the side of the non-overlapping opening of the adjacent interlocking overlap prefabricated polymer waterproof membrane are thrown away at the same time, and the overlapping seam is rolled until the overlapping edge is completely and tightly fitted, and then the third insulating film layer of the first interlocking overlap prefabricated polymer waterproof membrane and the fourth insulating film layer on the side of the non-overlapping opening of the adjacent membrane are thrown away at the same time, and the overlapping seam is rolled until the overlapping edge is completely and tightly fitted.

[0022] The working principle and beneficial effects of the present invention are: In the present invention, the interlocking overlap prefabricated polymer waterproofing membrane includes a cloth base material layer, an upper waterproof layer, a lower waterproof layer, and a base layer between the two waterproof layers, and adopts a self-adhesive interlocking overlap structure. This overlap method makes the entire overlap structure more stable. The components of the upper waterproof layer and the lower waterproof layer in the interlocking overlap prefabricated polymer waterproofing membrane are tightly combined, and while having excellent waterproof performance, the tensile strength and aging resistance of the interlocking overlap prefabricated polymer waterproofing membrane can be improved. Among them, by introducing two metallocene polyolefins, metallocene polyethylene and metallocene polypropylene, and optimizing the formula of the two, the tensile performance and aging resistance of the interlocking overlap prefabricated polymer waterproofing membrane can be significantly improved. DETAILED DESCRIPTION

[0023] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0024] In the following embodiments and comparative examples, the polyolefin is polyethylene, and the polyethylene is high-density polyethylene, model C430A; the model of metallocene polyethylene is SP2320; the model of metallocene polypropylene is MR30MC2; the model of EPDM rubber is 4045M; the particle size of talcum powder is 800 mesh; the compatibilizer is PE-g-MAH, model NF528; the base material of the cloth material layer is polyester cloth, with a thickness of 0.4 mm; the thickness of the upper waterproof layer and the lower waterproof layer are both 1.2 mm; the thickness of the tread base layer is 1.2 mm; the model of polyvinyl pyrrolidone is PVP K90.

[0025] Example 1 A bite-type overlapping prefabricated polymer waterproofing coiled material, which comprises, from top to bottom, a cloth-based material layer, an upper waterproof layer, a base layer, a lower waterproof layer and a first insulating film layer, an overlapping opening is provided on one side of the polymer waterproofing coiled material, the overlapping opening is formed by separating the upper waterproof layer and the lower waterproof layer, a second insulating film layer is provided on the upper surface of the overlapping opening, a third insulating film layer is provided on the lower surface of the overlapping opening, and a fourth insulating film layer is provided on the upper surface of the other side of the cloth-based material layer away from the overlapping opening; The upper waterproof layer and the lower waterproof layer each independently comprise the following components in parts by weight: 50 parts of polyethylene, 10 parts of metallocene polyolefin, 30 parts of EPDM rubber, 30 parts of talc, 30 parts of aluminum hydroxide, 1 part of antioxidant 1010, 0.5 parts of Tinuvin 328, 4 parts of titanium dioxide, 1 part of PE-g-MAH; The metallocene polyolefin comprises 0.5 parts of metallocene polyethylene and 9.5 parts of metallocene polypropylene; A method for preparing a bite-type overlap prefabricated polymer waterproofing membrane comprises the following steps: S1, mixing the components of the upper waterproof layer in parts by weight, and extruding to obtain an upper waterproof layer sheet; S2, mixing the components of the lower waterproof layer in parts by weight, and extruding to obtain a lower waterproof layer sheet; Wherein, in steps S1 and S2, during extrusion, the extrusion temperature of zone 1 is 160°C, the extrusion temperature of zone 2 is 180°C, and the extrusion temperature of zone 3 is 170°C; S3, covering the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the tire base layer respectively, and rolling forming, to obtain the upper waterproof layer and the lower waterproof layer respectively covering the upper and lower sides of the tire base layer; S4, laying a cloth-based material layer on the upper surface of the upper waterproof layer, and laying a first isolation membrane layer on the lower surface of the lower waterproof layer, to obtain a cloth-based material layer laid on the upper surface of the upper waterproof layer and a first isolation membrane layer laid on the lower surface of the lower waterproof layer; S5. An overlapping opening is provided on one side of the polymer waterproof membrane, and the overlapping opening is formed by separating the upper waterproof layer and the lower waterproof layer. The second isolation membrane layer is arranged on the upper surface of the overlapping opening, the third isolation membrane layer is arranged on the lower surface of the overlapping opening, and the fourth isolation membrane layer is arranged on the upper surface of the other side of the cloth-based material layer away from the overlapping opening to obtain a bite-type overlapping prefabricated polymer waterproof membrane.

[0026] Example 2 A bite-type overlapping prefabricated polymer waterproofing coiled material, which comprises, from top to bottom, a cloth-based material layer, an upper waterproof layer, a base layer, a lower waterproof layer and a first insulating film layer, an overlapping opening is provided on one side of the polymer waterproofing coiled material, the overlapping opening is formed by separating the upper waterproof layer and the lower waterproof layer, a second insulating film layer is provided on the upper surface of the overlapping opening, a third insulating film layer is provided on the lower surface of the overlapping opening, and a fourth insulating film layer is provided on the upper surface of the other side of the cloth-based material layer away from the overlapping opening; The upper waterproof layer and the lower waterproof layer each independently comprise the following components in parts by weight: 60 parts of polyethylene, 18 parts of metallocene polyolefin, 32 parts of EPDM rubber, 40 parts of talc, 35 parts of aluminum hydroxide, 2 parts of antioxidant 1010, 1 part of Tinuvin 328, 5 parts of titanium dioxide, 2 parts of PE-g-MAH; The metallocene polyolefin comprises 11 parts of metallocene polyethylene and 7 parts of metallocene polypropylene; A method for preparing a bite-type overlapped prefabricated polymer waterproofing membrane comprises the following steps: S1, mixing the components of the upper waterproof layer in parts by weight, and extruding to obtain an upper waterproof layer sheet; S2, mixing the components of the lower waterproof layer in parts by weight, and extruding to obtain a lower waterproof layer sheet; Wherein, in steps S1 and S2, during extrusion, the extrusion temperature of zone 1 is 160°C, the extrusion temperature of zone 2 is 180°C, and the extrusion temperature of zone 3 is 170°C; S3, covering the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the tire base layer respectively, and rolling forming, to obtain the upper waterproof layer and the lower waterproof layer respectively covering the upper and lower sides of the tire base layer; S4, laying a cloth-based material layer on the upper surface of the upper waterproof layer, and laying a first isolation membrane layer on the lower surface of the lower waterproof layer, to obtain a cloth-based material layer laid on the upper surface of the upper waterproof layer and a first isolation membrane layer laid on the lower surface of the lower waterproof layer; S5. An overlapping opening is provided on one side of the polymer waterproof membrane, and the overlapping opening is formed by separating the upper waterproof layer and the lower waterproof layer. The second isolation membrane layer is arranged on the upper surface of the overlapping opening, the third isolation membrane layer is arranged on the lower surface of the overlapping opening, and the fourth isolation membrane layer is arranged on the upper surface of the other side of the cloth-based material layer away from the overlapping opening to obtain a bite-type overlapping prefabricated polymer waterproof membrane.

[0027] Example 3 A bite-type overlapping prefabricated polymer waterproofing coiled material, which comprises, from top to bottom, a cloth-based material layer, an upper waterproof layer, a base layer, a lower waterproof layer and a first insulating film layer, an overlapping opening is provided on one side of the polymer waterproofing coiled material, the overlapping opening is formed by separating the upper waterproof layer and the lower waterproof layer, a second insulating film layer is provided on the upper surface of the overlapping opening, a third insulating film layer is provided on the lower surface of the overlapping opening, and a fourth insulating film layer is provided on the upper surface of the other side of the cloth-based material layer away from the overlapping opening; The upper waterproof layer and the lower waterproof layer each independently comprise the following components in parts by weight: 65 parts of polyethylene, 20 parts of metallocene polyolefin, 35 parts of EPDM rubber, 45 parts of talc, 40 parts of aluminum hydroxide, 3 parts of antioxidant 1010, 1.5 parts of Tinuvin 328, 6 parts of titanium dioxide, 3 parts of PE-g-MAH; The metallocene polyolefin comprises 19 parts of metallocene polyethylene and 1 part of metallocene polypropylene; A method for preparing a bite-type overlap prefabricated polymer waterproofing membrane comprises the following steps: S1, mixing the components of the upper waterproof layer in parts by weight, and extruding to obtain an upper waterproof layer sheet; S2, mixing the components of the lower waterproof layer in parts by weight, and extruding to obtain a lower waterproof layer sheet; Wherein, in steps S1 and S2, during extrusion, the extrusion temperature of zone 1 is 160°C, the extrusion temperature of zone 2 is 180°C, and the extrusion temperature of zone 3 is 170°C; S3, covering the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the tire base layer respectively, and rolling forming, to obtain the upper waterproof layer and the lower waterproof layer respectively covering the upper and lower sides of the tire base layer; S4, laying a cloth-based material layer on the upper surface of the upper waterproof layer, and laying a first isolation membrane layer on the lower surface of the lower waterproof layer, to obtain a cloth-based material layer laid on the upper surface of the upper waterproof layer and a first isolation membrane layer laid on the lower surface of the lower waterproof layer; S5. An overlapping opening is provided on one side of the polymer waterproof membrane, and the overlapping opening is formed by separating the upper waterproof layer and the lower waterproof layer. The second isolation membrane layer is arranged on the upper surface of the overlapping opening, the third isolation membrane layer is arranged on the lower surface of the overlapping opening, and the fourth isolation membrane layer is arranged on the upper surface of the other side of the cloth-based material layer away from the overlapping opening to obtain a bite-type overlapping prefabricated polymer waterproof membrane.

[0028] Example 4 The only difference between this embodiment and embodiment 2 is that in this embodiment, the metallocene polyolefin includes 16 parts of metallocene polyethylene and 2 parts of metallocene polypropylene.

[0029] Example 5 The only difference between this embodiment and embodiment 2 is that in this embodiment, the metallocene polyolefin includes 12 parts of metallocene polyethylene and 6 parts of metallocene polypropylene.

[0030] Example 6 The only difference between this embodiment and embodiment 2 is that in this embodiment, the metallocene polyolefin includes 15 parts of metallocene polyethylene and 3 parts of metallocene polypropylene.

[0031] Example 7 The only difference between this embodiment and Embodiment 6 is that, in this embodiment, the talcum powder is modified talcum powder, the raw materials of the modified talcum powder include talcum powder and 2-hydroxy-3-naphthoic acid, and the preparation method of the modified talcum powder includes the following steps: dissolving 3 parts of 2-hydroxy-3-naphthoic acid in ethanol to obtain a 2-hydroxy-3-naphthoic acid solution with a mass fraction of 6%, adding 37 parts of talcum powder to the 2-hydroxy-3-naphthoic acid solution with a mass fraction of 6%, dispersing evenly, and drying to obtain modified talcum powder.

[0032] Example 8 The only difference between this embodiment and embodiment 6 is that in this embodiment, the talcum powder is modified talcum powder, the raw materials of the modified talcum powder include talcum powder and polyvinyl pyrrolidone, and the preparation method of the modified talcum powder includes the following steps: dissolving 3 parts of polyvinyl pyrrolidone in water to obtain a polyvinyl pyrrolidone solution with a mass fraction of 4%, adding 37 parts of talcum powder to the polyvinyl pyrrolidone solution with a mass fraction of 4%, dispersing evenly, and drying to obtain modified talcum powder.

[0033] Example 9 The difference between this embodiment and embodiment 6 is that in this embodiment, the talcum powder is modified talcum powder, the raw materials of the modified talcum powder include talcum powder, 2-hydroxy-3-naphthoic acid and polyvinyl pyrrolidone, and the preparation method of the modified talcum powder includes the following steps: A1, 1.5 parts of 2-hydroxy-3-naphthoic acid were dissolved in ethanol to obtain a 5% 2-hydroxy-3-naphthoic acid solution, 37 parts of talcum powder were added to the 5% 2-hydroxy-3-naphthoic acid solution, the mixture was evenly dispersed and dried to obtain 2-hydroxy-3-naphthoic acid modified talcum powder; A2. Dissolve 1.5 parts of polyvinyl pyrrolidone in water to obtain a polyvinyl pyrrolidone solution with a mass fraction of 4%. Add 2-hydroxy-3-naphthoic acid modified talc to the polyvinyl pyrrolidone solution with a mass fraction of 4%, disperse evenly, and dry to obtain modified talc.

[0034] Example 10 The only difference between this embodiment and embodiment 9 is that, in this embodiment, 31 parts of talc, 4.5 parts of 2-hydroxy-3-naphthoic acid and 4.5 parts of polyvinyl pyrrolidone are added.

[0035] Embodiment 11 The only difference between this embodiment and embodiment 9 is that, in this embodiment, 36 parts of talc, 2 parts of 2-hydroxy-3-naphthoic acid and 2 parts of polyvinyl pyrrolidone are added.

[0036] Example 12 The only difference between this embodiment and embodiment 9 is that, in this embodiment, 32 parts of talc, 4 parts of 2-hydroxy-3-naphthoic acid and 4 parts of polyvinyl pyrrolidone are added.

[0037] Comparative Example 1 The difference between this comparative example and Example 1 is that in this comparative example, the metallocene polyolefin is only 10 parts of metallocene polyethylene.

[0038] Comparative Example 2 The difference between this comparative example and Example 1 is that in this comparative example, the metallocene polyolefin is only 10 parts of metallocene polypropylene.

[0039] Comparative Example 3 The only difference between this comparative example and Example 1 is that in this comparative example, no metallocene polyolefin is added.

[0040] Experimental Example 1 The interlocking overlap prefabricated polymer waterproof membranes prepared in Examples 1 to 12 and Comparative Examples 1 to 3 were tested for tensile strength and elongation at break in accordance with GB / T23457-2017 "Pre-laid waterproof membranes".

[0041] Experimental Example 2 The interlocking overlap prefabricated polymer waterproof membranes prepared in Examples 1 to 12 and Comparative Examples 1 to 3 were subjected to a heat aging test according to the method in GB / T23457-2017 "Pre-laid Waterproof Membrane", and then the tensile strength test after the heat aging test was performed according to the above-mentioned tensile strength test method, and the tensile strength change rate was tested according to the following formula: tensile strength change rate = (tensile strength before heat aging test - tensile strength after heat aging test) / tensile strength before heat aging test × 100%, wherein the temperature during the heat aging test was 116°C and the time was 168h.

[0042] The test results are shown in Table 1 below: Table 1 Performance test results of Examples 1 to 12 and Comparative Examples 1 to 3

[0043] Compared with comparative examples 1 to 3, the tensile strength and elongation at break of Example 1 are significantly improved, and the change rate of tensile strength after heat aging is significantly reduced, indicating that the two metallocene polyolefins, metallocene polyethylene and metallocene polypropylene, in the waterproof layer of the interlocking lap prefabricated polymer waterproof membrane have a synergistic effect, which can significantly improve the tensile properties and aging resistance of the interlocking lap prefabricated polymer waterproof membrane.

[0044] Compared with Examples 2 and 4, the tensile strength and elongation at break of Examples 5 to 6 are improved, and the change rate of tensile strength after thermal aging is significantly reduced, indicating that when the weight ratio of metallocene polyethylene to metallocene polypropylene is 2 to 5:1, the tensile properties and aging resistance of the interlocking lap prefabricated polymer waterproof membrane can be further improved.

[0045] Compared with Examples 6 to 8, the tensile strength and elongation at break of Examples 9 to 12 are improved, and the change rate of tensile strength after heat aging is significantly reduced, indicating that the surface modification of talc by 2-hydroxy-3-naphthoic acid and polyvinyl pyrrolidone can further improve the tensile properties and aging resistance of the interlocking overlap prefabricated polymer waterproofing membrane. In addition, compared with Examples 9 to 10, the tensile strength and elongation at break of Examples 11 to 12 are improved, and the change rate of tensile strength after heat aging is significantly reduced, indicating that when the weight ratio of talc, 2-hydroxy-3-naphthoic acid and polyvinyl pyrrolidone is 8 to 18:1:1, the tensile properties and aging resistance of the interlocking overlap prefabricated polymer waterproofing membrane can be further improved.

[0046] The above are only 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 in the protection scope of the present invention.

Claims

1. A bite-type overlap prefabricated polymer waterproofing membrane, characterized in that: The invention comprises, from top to bottom, a cloth-based material layer, an upper waterproof layer, a base layer, a lower waterproof layer and a first insulating film layer, a lap opening is provided on one side of the polymer waterproof coiled material, the lap opening is formed by separating the upper waterproof layer and the lower waterproof layer, a second insulating film layer is provided on the upper surface of the lap opening, a third insulating film layer is provided on the lower surface of the lap opening, and a fourth insulating film layer is provided on the upper surface of the other side of the cloth-based material layer away from the lap opening; The upper waterproof layer and the lower waterproof layer each independently comprise the following components in parts by weight: 50-65 parts of polyolefin, 10-20 parts of metallocene polyolefin, 30-35 parts of EPDM rubber, 30-45 parts of talc, 30-40 parts of flame retardant, 1-3 parts of antioxidant, 0.5-1.5 parts of ultraviolet absorber, 4-6 parts of pigment, 1-3 parts of compatibilizer; The metallocene polyolefin includes metallocene polyethylene and metallocene polypropylene, and the weight ratio of the metallocene polyethylene to the metallocene polypropylene is 1:19-19:

1.

2. The interlocking overlap prefabricated polymer waterproofing membrane according to claim 1, characterized in that: The weight ratio of the metallocene polyethylene to the metallocene polypropylene is 2-5:

1.

3. The interlocking overlap prefabricated polymer waterproofing membrane according to claim 1, characterized in that: The talcum powder is modified talcum powder, and the raw materials of the modified talcum powder include talcum powder, 2-hydroxy-3-naphthoic acid and polyvinyl pyrrolidone.

4. The interlocking overlap prefabricated polymer waterproofing membrane according to claim 3, characterized in that: The weight ratio of the talc powder, 2-hydroxy-3-naphthoic acid and polyvinyl pyrrolidone is 8-18:1:

1.

5. The interlocking overlap prefabricated polymer waterproofing membrane according to claim 3, characterized in that: The preparation method of the modified talcum powder comprises the following steps: A1, dissolving the 2-hydroxy-3-naphthoic acid in ethanol to obtain a 2-hydroxy-3-naphthoic acid solution, adding the talcum powder to the 2-hydroxy-3-naphthoic acid solution, dispersing evenly, and drying to obtain 2-hydroxy-3-naphthoic acid modified talcum powder; A2, dissolving the polyvinyl pyrrolidone in water to obtain a polyvinyl pyrrolidone solution, adding the 2-hydroxy-3-naphthoic acid modified talc to the polyvinyl pyrrolidone solution, dispersing evenly, and drying to obtain modified talc.

6. The interlocking overlap prefabricated polymer waterproofing membrane according to claim 1, characterized in that: The cloth base material of the cloth base material layer is one of polypropylene cloth, polyester cloth, polyester cloth, glass fiber cloth, and various types of non-woven fabrics.

7. The interlocking overlap prefabricated polymer waterproofing membrane according to claim 1, characterized in that: The tire base layer is long-fiber reinforced polyester felt.

8. The interlocking overlap prefabricated polymer waterproofing membrane according to claim 1, characterized in that: The polyolefin is one or both of polyethylene and polypropylene; the flame retardant is one or both of magnesium hydroxide and aluminum hydroxide; the antioxidant is one or more of antioxidant 1010, antioxidant 168, and antioxidant 1098; the ultraviolet absorber is one or more of Tinuvin 234, Tinuvin 328, and Tinuvin 622; the pigment is one or both of titanium dioxide and zinc oxide; and the compatibilizer is one or both of PE-g-MAH and PP-g-MAH.

9. The method for preparing a bite-type overlap prefabricated polymer waterproofing membrane according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, mixing the components of the upper waterproof layer in parts by weight uniformly, and extruding to obtain an upper waterproof layer sheet; S2, mixing the components of the lower waterproof layer in parts by weight uniformly, and extruding to obtain a lower waterproof layer sheet; S3, covering the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the tire base layer respectively, and rolling forming, to obtain the upper waterproof layer and the lower waterproof layer respectively covering the upper and lower sides of the tire base layer; S4, laying a cloth-based material layer on the upper surface of the upper waterproof layer, and laying a first isolation membrane layer on the lower surface of the lower waterproof layer, to obtain a cloth-based material layer laid on the upper surface of the upper waterproof layer and a first isolation membrane layer laid on the lower surface of the lower waterproof layer; S5. An overlapping opening is provided on one side of the polymer waterproof membrane, and the overlapping opening is formed by separating the upper waterproof layer and the lower waterproof layer. The second isolation membrane layer is arranged on the upper surface of the overlapping opening, the third isolation membrane layer is arranged on the lower surface of the overlapping opening, and the fourth isolation membrane layer is arranged on the upper surface of the other side of the cloth-based material layer away from the overlapping opening, so as to obtain a bite-type overlapping prefabricated polymer waterproof membrane.

10. The method for preparing a bite-type overlapped prefabricated polymer waterproofing membrane according to claim 9, characterized in that: In steps S1 and S2, the temperature during extrusion is 160-180°C.

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