A bite-type lapped prefabricated polymer waterproofing membrane and its preparation method

Abstract

The present invention relates to the technical field of waterproof coiled materials, and provides an interlocking lap prefabricated polymer waterproof coiled material and a preparation method thereof. The interlocking lap prefabricated polymer waterproof coiled material comprises, from top to bottom in sequence, a fabric base material layer, an upper waterproof layer, a carcass layer, a lower waterproof layer and a first isolation film layer. The upper waterproof layer and the lower waterproof layer independently comprise the following components in parts by weight: 50-65 parts of polyolefin, 10-20 parts of metallocene polyolefin, 30-35 parts of ethylene propylene diene monomer rubber, 30-45 parts of talcum powder, 30-40 parts of flame retardant, 1-3 parts of antioxidant, 0.5-1.5 parts of ultraviolet absorber, 4-6 parts of pigment, and 1-3 parts of compatibilizer. Through the above technical solution, the problems of poor tensile performance and poor aging resistance of the interlocking lap prefabricated polymer waterproof coiled material in the related art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof coiled materials, and specifically, to a bite-type lap joint prefabricated polymer waterproof coiled material and a preparation method thereof. Background Art

[0002] Waterproof coiled materials, as key materials in building waterproof projects, can build a continuous waterproof barrier on the building surface with their excellent water impermeability, effectively resisting water penetration, thus protecting the building structure from water damage and laying a solid waterproof foundation for various projects. The unique feature of the bite-type lap joint prefabricated polymer waterproof coiled material is the adoption of the bite-type double lap joint technology. This technology ensures the tightness of the lap joint edge of the coiled material, fundamentally avoiding the occurrence of water channeling phenomenon and significantly reducing the leakage risk caused by loose lap joints.

[0003] However, it is worth noting that the traditional bite-type lap joint double polymer film-based waterproof coiled material still has limitations in performance, especially in terms of tensile performance and aging resistance, which directly limit its service life and long-term protection effect. Therefore, developing a bite-type lap joint prefabricated polymer waterproof coiled material with good tensile performance and aging resistance is of great significance for improving the overall quality and durability of building waterproof projects. Summary of the Invention

[0004] The present invention provides a bite-type lap joint prefabricated polymer waterproof coiled material and a preparation method thereof, which solve the problems of poor tensile performance and poor aging resistance of the bite-type lap joint prefabricated polymer waterproof coiled material in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides a bite-type lap joint prefabricated polymer waterproof coiled material, which sequentially includes a base fabric material layer, an upper waterproof layer, a carcass layer, a lower waterproof layer and a first release film layer from top to bottom. One side of the polymer waterproof coiled material is provided with a lap joint opening, which is formed by separating the upper waterproof layer and the lower waterproof layer. The upper surface of the lap joint opening is provided with a second release film layer, the lower surface of the lap joint opening is provided with a third release film layer, and the upper surface of the other side of the base fabric material layer away from the lap joint opening is provided with a fourth release film layer;

[0007] The upper waterproof layer and the lower waterproof layer independently include the following components in parts by weight:

[0008] 50 - 65 parts of polyolefin, 10 - 20 parts of metallocene polyolefin, 30 - 35 parts of ethylene propylene diene monomer rubber, 30 - 45 parts of talcum powder, 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;

[0009] The metallocene polyolefins include metallocene polyethylene and metallocene polypropylene, and the weight ratio of the metallocene polyethylene to the metallocene polypropylene is 1:19 to 19:1.

[0010] As a further technical solution, the weight ratio of the metallocene polyethylene to the metallocene polypropylene is 2 to 5:1.

[0011] When the weight ratio of the metallocene polyethylene to the metallocene polypropylene is 2 to 5:1, the tensile property and aging resistance of the prefabricated high molecular waterproofing membrane with snap-in lap joint can be further improved.

[0012] 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 polyvinylpyrrolidone.

[0013] Surface modification of the talcum powder with 2-hydroxy-3-naphthoic acid and polyvinylpyrrolidone can make the inorganic filler of the talcum powder disperse more uniformly in the polyolefin organic matrix, making the combination of the organic and inorganic components tighter, thereby further improving the tensile property and aging resistance of the prefabricated high molecular waterproofing membrane with snap-in lap joint.

[0014] As a further technical solution, the weight ratio of the talcum powder, 2-hydroxy-3-naphthoic acid, and polyvinylpyrrolidone is 8 to 18:1:1.

[0015] When the weight ratio of the talcum powder, 2-hydroxy-3-naphthoic acid, and polyvinylpyrrolidone is 8 to 18:1:1, the tensile property and aging resistance of the prefabricated high molecular waterproofing membrane with snap-in lap joint can be further improved.

[0016] As a further technical solution, the preparation method of the modified talcum powder includes the following steps:

[0017] A1. Dissolve the 2-hydroxy-3-naphthoic acid in ethanol to obtain a 2-hydroxy-3-naphthoic acid solution, add the talcum powder to the 2-hydroxy-3-naphthoic acid solution, disperse evenly, and dry to obtain 2-hydroxy-3-naphthoic acid modified talcum powder;

[0018] A2. Dissolve the polyvinylpyrrolidone in water to obtain a polyvinylpyrrolidone solution, add the 2-hydroxy-3-naphthoic acid modified talcum powder to the polyvinylpyrrolidone solution, disperse evenly, and dry to obtain the modified talcum powder.

[0019] 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 polyvinylpyrrolidone solution is 4% to 8%.

[0020] As a further technical solution, the base material of the base material layer is one of polypropylene cloth, polyester cloth, polyester fabric, fiberglass cloth, and various types of non-woven fabrics.

[0021] As a further technical solution, the carcass layer is a long fiber reinforced polyester felt.

[0022] 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.

[0023] As a further technical solution, the polyolefin is one or two of polyethylene and polypropylene; the flame retardant is one or two 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 two of titanium dioxide and zinc oxide; the compatibilizer is one or two of PE-g-MAH and PP-g-MAH.

[0024] As a further technical solution, the thicknesses of the upper waterproof layer and the lower waterproof layer are each independently 1.2 - 1.5 mm; the thickness of the carcass layer is 1.0 - 1.2 mm; the thickness of the base material layer is 0.4 - 0.6 mm.

[0025] The present invention also provides a preparation method of the above-mentioned bite-type lapped prefabricated polymer waterproof coiled material, which includes the following steps:

[0026] S1. Mix the components of the upper waterproof layer in the above weight parts evenly and extrude to obtain the upper waterproof layer sheet.

[0027] S2. Mix the components of the lower waterproof layer in the above weight parts evenly and extrude to obtain the lower waterproof layer sheet.

[0028] S3. Cover the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the carcass layer respectively, and roll and form to obtain the upper waterproof layer and the lower waterproof layer respectively covered on the upper and lower sides of the carcass layer.

[0029] S4. Lay the base material layer on the upper surface of the upper waterproof layer and lay the first isolation film layer on the lower surface of the lower waterproof layer to obtain the base material layer laid on the upper surface of the upper waterproof layer and the first isolation film layer laid on the lower surface of the lower waterproof layer.

[0030] S5. A lapping opening is provided on one side of the polymer waterproof coiled material. The lapping opening is formed by the separation of the upper waterproof layer and the lower waterproof layer. The second isolation film layer is arranged on the upper surface of the lapping opening, the third isolation film layer is arranged on the lower surface of the lapping opening, and the fourth isolation film layer is arranged on the upper surface of the other side of the base material layer away from the lapping opening, thus obtaining a bite-type lapping prefabricated polymer waterproof coiled material.

[0031] As a further technical solution, in steps S1 and S2, during the extrusion, the temperature is 160 - 180 °C.

[0032] The present invention also provides a construction process for the bite-type lapping prefabricated polymer waterproof coiled material, which is completed by a self-adhesive lapping method. The self-adhesive lapping method includes the following steps: laying the first piece of bite-type lapping prefabricated polymer waterproof coiled material on the base layer according to the design requirements. The upper and lower edge coiled materials of the upper waterproof layer and the lower waterproof layer on the side with the lapping opening are respectively located on the upper side of the base material layer and the lower side of the lower waterproof layer on the side without the lapping opening of the adjacent piece of bite-type lapping prefabricated polymer waterproof coiled material, and the overlapping width is 60 - 100 mm, forming a bite-type lapping structure and aligning them fully. Then, simultaneously removing the second isolation film layer of the first piece of bite-type lapping prefabricated polymer waterproof coiled material and the fourth isolation film layer on the side without the lapping opening of the adjacent piece of bite-type lapping prefabricated polymer waterproof coiled material, and rolling the lapping seam until the lapping edge is completely tightly bonded. Next, simultaneously removing the third isolation film layer of the first piece of bite-type lapping prefabricated polymer waterproof coiled material and the fourth isolation film layer on the side without the lapping opening of the adjacent coiled material, and rolling the lapping seam until the lapping edge is completely tightly bonded.

[0033] The working principle and beneficial effects of the present invention are as follows:

[0034] In the present invention, the bite-type lapping prefabricated polymer waterproof coiled material includes a base material layer, an upper waterproof layer, a lower waterproof layer, and a carcass layer between the two waterproof layers. It adopts a self-adhesive bite-type lapping structure, which makes the entire lapping structure more stable. The components between the upper waterproof layer and the lower waterproof layer in the bite-type lapping prefabricated polymer waterproof coiled material are tightly combined. While having excellent waterproof performance, it can improve the tensile strength and aging resistance of the bite-type lapping prefabricated polymer waterproof coiled material. Among them, by introducing two metallocene polyolefins, metallocene polyethylene and metallocene polypropylene, and optimizing their formulations, the tensile performance and aging resistance of the bite-type lapping prefabricated polymer waterproof coiled material can be significantly improved. Specific embodiments

[0035] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0036] In the following examples and comparative examples, the polyolefin is selected as polyethylene, the polyethylene is high-density polyethylene, and the model is C430A; the model of metallocene polyethylene is SP2320; the model of metallocene polypropylene is MR30MC2; the model of ethylene propylene diene monomer rubber is 4045M; the particle size of talcum powder is 800 mesh; the compatibilizer is PE-g-MAH, and the model is NF528; the base material layer of the base material is polyester cloth, and the thickness is 0.4 mm; the thicknesses of the upper waterproof layer and the lower waterproof layer are both 1.2 mm; the thickness of the carcass layer is 1.2 mm; the model of polyvinylpyrrolidone is PVP K90.

[0037] Example 1

[0038] A bite-type overlapping prefabricated polymer waterproof coiled material, which successively includes a base material layer, an upper waterproof layer, a carcass layer, a lower waterproof layer and a first release film layer from top to bottom. One side of the polymer waterproof coiled material is provided with a lapping opening, which is formed by the separation of the upper waterproof layer and the lower waterproof layer. The upper surface of the lapping opening is provided with a second release film layer, and the lower surface of the lapping opening is provided with a third release film layer. The upper surface of the other side of the base material layer away from the lapping opening is provided with a fourth release film layer;

[0039] The upper waterproof layer and the lower waterproof layer each independently include the following components in parts by weight:

[0040] 50 parts of polyethylene, 10 parts of metallocene polyolefin, 30 parts of ethylene propylene diene monomer rubber, 30 parts of talcum powder, 30 parts of aluminum hydroxide, 1 part of antioxidant 1010, 0.5 part of Tinuvin 328, 4 parts of titanium dioxide, 1 part of PE-g-MAH;

[0041] The metallocene polyolefin includes 0.5 part of metallocene polyethylene and 9.5 parts of metallocene polypropylene;

[0042] A preparation method of a bite-type overlapping prefabricated polymer waterproof coiled material includes the following steps:

[0043] S1. Mix the components of the upper waterproof layer in parts by weight evenly and extrude to obtain an upper waterproof layer sheet;

[0044] S2. Mix the components of the lower waterproof layer in parts by weight evenly and extrude to obtain a lower waterproof layer sheet;

[0045] Among them, in steps S1 and S2, when extruding, the extrusion temperature in zone 1 is 160°C, the extrusion temperature in zone 2 is 180°C, and the extrusion temperature in zone 3 is 170°C;

[0046] S3. Cover the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the tire base layer respectively, and roll and form to obtain an upper waterproof layer and a lower waterproof layer respectively covered on the upper and lower sides of the tire base layer;

[0047] S4. Lay a fabric base material layer on the upper surface of the upper waterproof layer, and lay a first isolation film layer on the lower surface of the lower waterproof layer to obtain a fabric base material layer laid on the upper surface of the upper waterproof layer and a first isolation film layer laid on the lower surface of the lower waterproof layer;

[0048] S5. There is a lapping opening on one side of the polymer waterproof coil, the lapping opening is formed by the separation of the upper waterproof layer and the lower waterproof layer, a second isolation film layer is arranged on the upper surface of the lapping opening, a third isolation film layer is arranged on the lower surface of the lapping opening, and a fourth isolation film layer is arranged on the upper surface of the other side of the fabric base material layer away from the lapping opening to obtain a bite-type lapping prefabricated polymer waterproof coil.

[0049] Example 2

[0050] A bite-type lapping prefabricated polymer waterproof coil, which sequentially includes a fabric base material layer, an upper waterproof layer, a tire base layer, a lower waterproof layer and a first isolation film layer from top to bottom. There is a lapping opening on one side of the polymer waterproof coil, the lapping opening is formed by the separation of the upper waterproof layer and the lower waterproof layer, a second isolation film layer is arranged on the upper surface of the lapping opening, a third isolation film layer is arranged on the lower surface of the lapping opening, and a fourth isolation film layer is arranged on the upper surface of the other side of the fabric base material layer away from the lapping opening;

[0051] The upper waterproof layer and the lower waterproof layer each independently include the following components in parts by weight:

[0052] 60 parts of polyethylene, 18 parts of metallocene polyolefin, 32 parts of ethylene propylene diene monomer rubber, 40 parts of talcum powder, 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;

[0053] The metallocene polyolefin includes 11 parts of metallocene polyethylene and 7 parts of metallocene polypropylene;

[0054] A preparation method of a bite-type lapping prefabricated polymer waterproof coil, which includes the following steps:

[0055] S1. Mix the components of the upper waterproof layer in parts by weight evenly and extrude to obtain an upper waterproof layer sheet;

[0056] S2. Mix the components of the lower waterproof layer in parts by weight evenly and extrude to obtain a lower waterproof layer sheet;

[0057] Among them, in steps S1 and S2, during extrusion, the extrusion temperature in zone 1 is 160°C, the extrusion temperature in zone 2 is 180°C, and the extrusion temperature in zone 3 is 170°C for both cases.

[0058] S3. Cover the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the carcass layer respectively, and roll and form to obtain the upper waterproof layer and the lower waterproof layer respectively covered on the upper and lower sides of the carcass layer.

[0059] S4. Lay the fabric base material layer on the upper surface of the upper waterproof layer, and lay the first release film layer on the lower surface of the lower waterproof layer to obtain the fabric base material layer laid on the upper surface of the upper waterproof layer and the first release film layer laid on the lower surface of the lower waterproof layer.

[0060] S5. There is a lapping opening on one side of the polymer waterproofing coil. The lapping opening is formed by the separation of the upper waterproof layer and the lower waterproof layer. Set the second release film layer on the upper surface of the lapping opening, set the third release film layer on the lower surface of the lapping opening, and set the fourth release film layer on the upper surface of the other side of the fabric base material layer away from the lapping opening to obtain the bite-type lapping prefabricated polymer waterproofing coil.

[0061] Example 3

[0062] A bite-type lapping prefabricated polymer waterproofing coil, which successively includes a fabric base material layer, an upper waterproof layer, a carcass layer, a lower waterproof layer, and a first release film layer from top to bottom. There is a lapping opening on one side of the polymer waterproofing coil. The lapping opening is formed by the separation of the upper waterproof layer and the lower waterproof layer. The upper surface of the lapping opening is provided with a second release film layer, the lower surface of the lapping opening is provided with a third release film layer, and the upper surface of the other side of the fabric base material layer away from the lapping opening is provided with a fourth release film layer.

[0063] The upper waterproof layer and the lower waterproof layer each independently include the following components in parts by weight:

[0064] 65 parts of polyethylene, 20 parts of metallocene polyolefin, 35 parts of ethylene propylene diene monomer rubber, 45 parts of talcum powder, 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;

[0065] The metallocene polyolefin includes 19 parts of metallocene polyethylene and 1 part of metallocene polypropylene;

[0066] A preparation method of a bite-type lapping prefabricated polymer waterproofing coil includes the following steps:

[0067] S1. Mix the components of the upper waterproof layer in parts by weight evenly and extrude to obtain the upper waterproof layer sheet.

[0068] S2. Mix the components of the lower waterproof layer evenly by weight, and extrude to obtain the lower waterproof layer sheet;

[0069] Among them, in steps S1 and S2, during extrusion, the extrusion temperature in zone 1 is 160°C, the extrusion temperature in zone 2 is 180°C, and the extrusion temperature in zone 3 is 170°C;

[0070] S3. Cover the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the base layer respectively, and roll and form to obtain the upper waterproof layer and the lower waterproof layer respectively covered on the upper and lower sides of the base layer;

[0071] S4. Lay a fabric base material layer on the upper surface of the upper waterproof layer, and lay a first isolation film layer on the lower surface of the lower waterproof layer to obtain the fabric base material layer laid on the upper surface of the upper waterproof layer and the first isolation film layer laid on the lower surface of the lower waterproof layer;

[0072] S5. There is a lapping opening on one side of the polymer waterproof coil. The lapping opening is formed by the separation of the upper waterproof layer and the lower waterproof layer. Set the second isolation film layer on the upper surface of the lapping opening, set the third isolation film layer on the lower surface of the lapping opening, and set the fourth isolation film layer on the upper surface of the other side of the fabric base material layer away from the lapping opening to obtain a bite-type lapping prefabricated polymer waterproof coil.

[0073] Example 4

[0074] The difference between this example and Example 2 is only that in this example, the metallocene polyolefin includes 16 parts of metallocene polyethylene and 2 parts of metallocene polypropylene.

[0075] Example 5

[0076] The difference between this example and Example 2 is only that in this example, the metallocene polyolefin includes 12 parts of metallocene polyethylene and 6 parts of metallocene polypropylene.

[0077] Example 6

[0078] The difference between this example and Example 2 is only that in this example, the metallocene polyolefin includes 15 parts of metallocene polyethylene and 3 parts of metallocene polypropylene.

[0079] Example 7

[0080] The difference between this example and Example 6 is only that in this example, the talcum powder is modified talcum powder. The raw materials of the modified talcum powder include talcum powder and 2-hydroxy-3-naphthoic acid. The preparation method of the modified talcum powder includes the following steps: Dissolve 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%. Add 37 parts of talcum powder to the 2-hydroxy-3-naphthoic acid solution with a mass fraction of 6%, disperse evenly, and dry to obtain the modified talcum powder.

[0081] Example 8

[0082] The difference between this example and Example 6 is only that in this example, the talcum powder is modified talcum powder. The raw materials of the modified talcum powder include talcum powder and polyvinylpyrrolidone. The preparation method of the modified talcum powder includes the following steps: Dissolve 3 parts of polyvinylpyrrolidone in water to obtain a polyvinylpyrrolidone solution with a mass fraction of 4%. Add 37 parts of talcum powder to the polyvinylpyrrolidone solution with a mass fraction of 4%, disperse evenly, and dry to obtain the modified talcum powder.

[0083] Example 9

[0084] The difference between this example and Example 6 is only that in this example, the talcum powder is modified talcum powder. The raw materials of the modified talcum powder include talcum powder, 2-hydroxy-3-naphthoic acid and polyvinylpyrrolidone. The preparation method of the modified talcum powder includes the following steps:

[0085] A1. Dissolve 1.5 parts of 2-hydroxy-3-naphthoic acid in ethanol to obtain a 2-hydroxy-3-naphthoic acid solution with a mass fraction of 5%. Add 37 parts of talcum powder to the 2-hydroxy-3-naphthoic acid solution with a mass fraction of 5%, disperse evenly, and dry to obtain 2-hydroxy-3-naphthoic acid modified talcum powder;

[0086] A2. Dissolve 1.5 parts of polyvinylpyrrolidone in water to obtain a polyvinylpyrrolidone solution with a mass fraction of 4%. Add 2-hydroxy-3-naphthoic acid modified talcum powder to the polyvinylpyrrolidone solution with a mass fraction of 4%, disperse evenly, and dry to obtain the modified talcum powder.

[0087] Example 10

[0088] The difference between this example and Example 9 is only that in this example, the added talcum powder is 31 parts, the added 2-hydroxy-3-naphthoic acid is 4.5 parts, and the added polyvinylpyrrolidone is 4.5 parts.

[0089] Example 11

[0090] The difference between this example and Example 9 is only that in this example, the added talcum powder is 36 parts, the added 2-hydroxy-3-naphthoic acid is 2 parts, and the added polyvinylpyrrolidone is 2 parts.

[0091] Example 12

[0092] The difference between this example and Example 9 is only that in this example, the added talcum powder is 32 parts, the added 2-hydroxy-3-naphthoic acid is 4 parts, and the added polyvinylpyrrolidone is 4 parts.

[0093] Comparative Example 1

[0094] The difference between this comparative example and Example 1 is only that in this comparative example, the metallocene polyolefin is only 10 parts of metallocene polyethylene.

[0095] Comparative Example 2

[0096] The difference between this comparative example and Example 1 is only that in this comparative example, the metallocene polyolefin is only 10 parts of metallocene polypropylene.

[0097] Comparative Example 3

[0098] The difference between this comparative example and Example 1 is only that in this comparative example, no metallocene polyolefin is added.

[0099] Experimental Example 1

[0100] The tensile strength and elongation at break of the bite-lap prefabricated polymer waterproofing membranes prepared in Examples 1 to 12 and Comparative Examples 1 to 3 were tested in accordance with GB / T 23457-2017 "Pre-laid Waterproofing Membranes".

[0101] Experimental Example 2

[0102] After the bite-lap prefabricated polymer waterproofing membranes prepared in Examples 1 to 12 and Comparative Examples 1 to 3 were subjected to a heat aging test in accordance with the method in GB / T 23457-2017 "Pre-laid Waterproofing Membranes", the tensile strength after the heat aging test was tested in accordance with the above-mentioned tensile strength test method, and the change rate of tensile strength was tested according to the following formula: change rate of tensile strength = (tensile strength before heat aging test - tensile strength after heat aging test) / tensile strength before heat aging test × 100%. Among them, when performing the heat aging test, the temperature was 116 °C and the time was 168 h.

[0103] The test results are shown in Table 1 below:

[0104] Table 1 Performance test results of Examples 1 to 12 and Comparative Examples 1 to 3

[0105]

[0106] Compared with Comparative Examples 1 to 3, the tensile strength and elongation at break of Example 1 were significantly improved, and the change rate of tensile strength after heat aging was significantly reduced, indicating that the two metallocene polyolefins, metallocene polyethylene and metallocene polypropylene, in the waterproof layer of the bite-lap prefabricated polymer waterproofing membrane have a synergistic effect, which can significantly improve the tensile performance and aging resistance of the bite-lap prefabricated polymer waterproofing membrane.

[0107] Compared with Examples 2 and 4, the tensile strength and elongation at break of Examples 5 to 6 are increased, and the change rate of tensile strength after heat aging is significantly decreased, 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 bite-lap prefabricated polymer waterproofing membrane can be further improved.

[0108] Compared with Examples 6 to 8, the tensile strength and elongation at break of Examples 9 to 12 are increased, and the change rate of tensile strength after heat aging is significantly decreased, indicating that the surface modification of talc powder with 2-hydroxy-3-naphthoic acid and polyvinylpyrrolidone simultaneously can further improve the tensile properties and aging resistance of the bite-lap 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 increased, and the change rate of tensile strength after heat aging is significantly decreased, indicating that when the weight ratio of talc powder, 2-hydroxy-3-naphthoic acid and polyvinylpyrrolidone is 8 to 18:1:1, the tensile properties and aging resistance of the bite-lap prefabricated polymer waterproofing membrane can be further improved.

[0109] The above are only the 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 principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bite-type lapped prefabricated polymer waterproofing membrane, characterized in that, It successively includes a base material layer, an upper waterproof layer, a base ply, a lower waterproof layer, and a first release film layer from top to bottom. One side of the polymer waterproof coil has a lapping opening formed by the separation of the upper waterproof layer and the lower waterproof layer. The upper surface of the lapping opening is provided with a second release film layer, and the lower surface of the lapping opening is provided with a third release film layer. The upper surface of the other side of the base material layer away from the lapping opening is provided with a fourth release film layer; The upper waterproof layer and the lower waterproof layer independently include the following components in parts by weight: 50-65 parts of polyolefin, 10-20 parts of metallocene polyolefin, 30-35 parts of ethylene propylene diene monomer rubber, 30-45 parts of talcum powder, 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 metallocene polyethylene to metallocene polypropylene is 1:19-19:1; 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 polyvinylpyrrolidone; The preparation method of the modified talcum powder includes the following steps: A1. Dissolve the 2-hydroxy-3-naphthoic acid in ethanol to obtain a 2-hydroxy-3-naphthoic acid solution. Add the talcum powder to the 2-hydroxy-3-naphthoic acid solution, disperse evenly, and dry to obtain 2-hydroxy-3-naphthoic acid modified talcum powder; A2. Dissolve the polyvinylpyrrolidone in water to obtain a polyvinylpyrrolidone solution. Add the 2-hydroxy-3-naphthoic acid modified talcum powder to the polyvinylpyrrolidone solution, disperse evenly, and dry to obtain modified talcum powder.

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

1.

3. The occlusive lap prefabricated polymer waterproofing membrane according to claim 1, wherein, The weight ratio of talcum powder, 2-hydroxy-3-naphthoic acid, and polyvinylpyrrolidone is 8-18:1:

1.

4. The bite-type lapped prefabricated polymer waterproofing membrane according to claim 1, wherein, The base material of the base material layer is one of polypropylene cloth, polyester cloth, and fiberglass cloth.

5. A bite-type lapped prefabricated polymer waterproofing membrane according to claim 1, wherein, The base ply is a long fiber reinforced polyester felt.

6. The bite-type lapped prefabricated polymer waterproofing membrane according to claim 1, wherein, The polyolefin is one or two of polyethylene and polypropylene; the flame retardant is one or two 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 two of titanium dioxide and zinc oxide; the compatibilizer is one or two of PE-g-MAH and PP-g-MAH.

7. A method for preparing an occlusive lap joint precast polymer waterproof coiled material according to any one of claims 1 to 6, characterized in that, It includes the following steps: S1. Mix the components of the upper waterproof layer in parts by weight evenly and extrude to obtain an upper waterproof layer sheet; S2. Mix the components of the lower waterproof layer in parts by weight evenly and extrude to obtain a lower waterproof layer sheet; S3. Cover the upper waterproof layer sheet and the lower waterproof layer sheet on the upper and lower sides of the base ply respectively and roll them into shape to obtain the upper waterproof layer and the lower waterproof layer respectively covered on the upper and lower sides of the base ply; S4. Lay a fabric base material layer on the upper surface of the upper waterproof layer, and lay a first isolation film layer on the lower surface of the lower waterproof layer, obtaining a fabric base material layer laid on the upper surface of the upper waterproof layer and a first isolation film layer laid on the lower surface of the lower waterproof layer; S5. There is a lapping opening on one side of the polymer waterproofing coil. The lapping opening is formed by separating the upper waterproof layer and the lower waterproof layer. Arrange the second isolation film layer on the upper surface of the lapping opening, arrange the third isolation film layer on the lower surface of the lapping opening, and arrange the fourth isolation film layer on the upper surface of the other side of the fabric base material layer away from the lapping opening, obtaining a bite-type lapping prefabricated polymer waterproofing coil.

8. The preparation method of a bite-type lapped prefabricated polymer waterproofing membrane according to claim 7, characterized in that, In steps S1 and S2, when extruding, the temperature is 160~180°C.

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