Anti-cracking waterborne polyurethane waterproof coiled material

Abstract

The utility model discloses an anti-cracking waterborne polyurethane waterproof roll. The anti-cracking waterborne polyurethane waterproof roll comprises a central layer, an outer protective layer and an adhesive layer, according to the utility model, the anti-cracking layers are arranged on the upper side and the lower side of the waterproof central layer, the two layers of basalt fiber nets keep the waterproof coiled material to have better anti-cracking performance, and the meshes of the basalt fiber nets are set to be regular hexagonal, so that a certain deformation space is provided when the waterproof coiled material is pulled, and the flexibility of the waterproof coiled material is kept; through the elasticity of the natural rubber layer, the waterproof coiled material can recover after the pulling force disappears.

Description

Technical Field

[0001] This utility model relates to the field of waterproof membrane technology, and in particular to a crack-resistant water-based polyurethane waterproof membrane. Background Technology

[0002] Waterproof membranes are mainly used in building walls, roofs, tunnels, highways, landfills, and other locations. It is a flexible building material that can be rolled up to resist leaks from external rainwater and groundwater. As a leak-proof connection between the foundation and the building structure, it serves as the first line of defense in the entire waterproofing project, playing a crucial role. With increasing environmental awareness and regulations, the research and development of environmentally friendly water-based polyurethane has gained significant attention. Polyurethane waterproof membranes are considered to have the best environmental performance and a very wide range of applications.

[0003] Existing polyurethane waterproof membranes have a significant drawback: poor crack resistance during use. They are prone to stress shrinkage and cracking in external environments, leading to deformation and reducing their service life and applicability. To address this, a single-component, crack-resistant waterborne polyurethane waterproof membrane is proposed, comprising an adhesive layer, a base layer, a crack-resistant layer, a waterproof layer, and an outer protective layer. This technology, through the combination of a polyester fiber layer, a glass fiber mesh layer, and an acrylic resin layer, enhances the crack resistance of the waterproof membrane, preventing deformation caused by external environmental pressure, stress shrinkage, and cracking, thus improving the practicality of the waterproof membrane.

[0004] The aforementioned disclosed technology has improved crack resistance compared to traditional technology to a certain extent. However, the actual improvement in crack resistance achieved by using a single layer of glass fiber mesh is limited. Therefore, it is necessary to further optimize the structure of water-based polyurethane waterproof membrane to improve its crack resistance performance. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a crack-resistant water-based polyurethane waterproof membrane.

[0006] The objective of this utility model is achieved through the following technical measures:

[0007] A crack-resistant waterborne polyurethane waterproof membrane includes a core layer, an outer protective layer, and an adhesive layer. The core layer is disposed between the outer protective layer and the adhesive layer. A first crack-resistant layer and a second crack-resistant layer are respectively disposed on the upper and lower side walls of the core layer. The outer protective layer is disposed on the side of the first crack-resistant layer away from the core layer. The adhesive layer is disposed on the side of the second crack-resistant layer away from the core layer. A release film is disposed on the side of the adhesive layer away from the second crack-resistant layer. The core layer includes a base layer and an upper coating layer and a lower coating layer respectively disposed on the upper and lower sides of the base layer. The opposite sides of the upper coating layer and the lower coating layer are respectively connected to the first crack-resistant layer and the second crack-resistant layer. The outer protective layer includes a weather-resistant layer and an impact-resistant layer distributed vertically. The side of the impact-resistant layer away from the weather-resistant layer is connected to the first crack-resistant layer. The first crack-resistant layer includes a first fiber woven mesh and a first upper cover layer and a first lower cover layer respectively disposed on the upper and lower sides of the first fiber woven mesh. The second crack-resistant layer includes a second fiber woven mesh and a second upper cover layer and a second lower cover layer respectively disposed on the upper and lower sides of the second fiber woven mesh.

[0008] As a further description of the above technical solution: both the first fiber woven mesh and the second fiber woven mesh are basalt fiber meshes, and the mesh of both the first fiber woven mesh and the second fiber woven mesh is hexagonal.

[0009] As a further description of the above technical solution: the first upper cover layer, the first lower cover layer, the second upper cover layer, and the second lower cover layer are all made of natural rubber.

[0010] As a further description of the above technical solution: both the upper coating and the lower coating are water-based polyurethane coatings.

[0011] As a further description of the above technical solution: the impact-resistant layer is EPDM rubber.

[0012] As a further description of the above technical solution: the weather-resistant layer is a thermoplastic polyurethane film.

[0013] As a further description of the above technical solution: the base layer is polyethylene cloth.

[0014] This utility model has the following beneficial effects:

[0015] Compared with existing technologies, this crack-resistant waterborne polyurethane waterproof membrane has crack-resistant layers on both the upper and lower sides of the core layer used for waterproofing. The two layers of basalt fiber mesh maintain the good crack resistance of the waterproof membrane. The mesh of the basalt fiber mesh is set as a regular hexagon, which provides a certain deformation space when the waterproof membrane is stretched, maintaining the flexibility of the waterproof membrane itself. The elasticity of the natural rubber layer allows the waterproof membrane to return to its original shape after the tensile force is removed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a partial sectional view of the side of the overall structure of this utility model.

[0018] Figure 3 This is a partial sectional view of the side of the first crack-resistant layer in this utility model.

[0019] Figure 4 This is a partial cross-sectional view of the side of the central layer of this utility model.

[0020] Figure 5 This is a partial sectional view of the side of the second crack-resistant layer in this utility model.

[0021] Figure 6 This is a partial structural diagram of the second fiber woven mesh in this utility model.

[0022] Figure 7 This is a partial sectional view of the side of the outer protective layer in this utility model.

[0023] In the diagram: 1. Outer protective layer; 2. First crack-resistant layer; 3. Central layer; 4. Second crack-resistant layer; 5. Adhesive layer; 6. Release film; 101. Impact-resistant layer; 102. Weather-resistant layer; 201. First fiber woven mesh; 202. First upper cover layer; 203. First lower cover layer; 301. Base layer; 302. Upper coating layer; 303. Lower coating layer; 401. Second fiber woven mesh; 402. Second upper cover layer; 403. Second lower cover layer. Detailed Implementation

[0024] Example: As attached Figures 1 to 7 As shown, a crack-resistant waterborne polyurethane waterproof membrane includes a core layer 3, an outer protective layer 1, and an adhesive layer 5. The core layer 3 is disposed between the outer protective layer 1 and the adhesive layer 5. A first crack-resistant layer 2 and a second crack-resistant layer 4 are respectively disposed on the upper and lower side walls of the core layer 3. The outer protective layer 1 is disposed on the side of the first crack-resistant layer 2 away from the core layer 3. The adhesive layer 5 is disposed on the side of the second crack-resistant layer 4 away from the core layer 3. A release film 6 is disposed on the side of the adhesive layer 5 away from the second crack-resistant layer 4.

[0025] To provide excellent waterproofing, the core layer 3 includes a base layer 301 and an upper coating layer 302 and a lower coating layer 303 respectively disposed on the upper and lower sides of the base layer 301. The opposite sides of the upper coating layer 302 and the lower coating layer 303 are connected to the first crack-resistant layer 2 and the second crack-resistant layer 4 respectively. Both the upper coating layer 302 and the lower coating layer 303 are water-based polyurethane coatings. The base layer 301 is polyethylene cloth. Polyethylene cloth is lightweight and high-strength, with excellent weather resistance, and can resist the erosion of harsh environments. It also has outstanding isolation performance, effectively blocking water, gas, oil and chemicals. Combined with the water-based polyurethane coatings applied to the upper and lower sides of the polyethylene cloth, it can achieve a very good waterproofing effect.

[0026] To improve the service life of the waterproof membrane, the outer protective layer 1 includes a weather-resistant layer 102 and an impact-resistant layer 101 distributed vertically. The side of the impact-resistant layer 101 away from the weather-resistant layer 102 is connected to the first crack-resistant layer 2. The impact-resistant layer 101 is made of EPDM rubber, and the weather-resistant layer 102 is made of thermoplastic polyurethane film. The thermoplastic polyurethane film has high tensile strength and elongation at break, can maintain the stability of the material within a large deformation range, and has better abrasion resistance than many other polymers. Its weather aging resistance is also excellent. EPDM rubber has the characteristics of aging resistance, corrosion resistance, heat resistance, and water vapor resistance, and has very high elasticity. By setting the impact-resistant layer 101 and the weather-resistant layer 102, the service life of the waterproof membrane in outdoor use can be effectively improved.

[0027] To improve crack resistance, the first crack-resistant layer 2 includes a first fiber woven mesh 201 and a first upper covering layer 202 and a first lower covering layer 203 respectively disposed on the upper and lower sides of the first fiber woven mesh 201. The second crack-resistant layer 4 includes a second fiber woven mesh 401 and a second upper covering layer 402 and a second lower covering layer 403 respectively disposed on the upper and lower sides of the second fiber woven mesh 401. Both the first fiber woven mesh 201 and the second fiber woven mesh 401 are basalt fiber meshes, and the mesh openings of the first fiber woven mesh 201 and the second fiber woven mesh 401 are regular hexagonal. Basalt fiber meshes have the characteristics of high strength and high modulus of high-tech fibers. The crack resistance of the waterproof membrane can be greatly improved by using two layers of basalt fiber meshes. Moreover, the regular hexagonal mesh openings of the basalt fiber meshes provide a certain space for the deformation of the waterproof membrane, allowing the waterproof membrane to still maintain its flexibility.

[0028] To improve the resilience of the waterproof membrane after being stretched, the first upper cover layer 202, the first lower cover layer 203, the second upper cover layer 402, and the second lower cover layer 403 are all made of natural rubber. The high resilience of natural rubber allows the waterproof membrane to recover quickly after being stretched and deformed.

[0029] Working principle: Polyethylene fabric is lightweight yet high-strength, with excellent weather resistance, resisting harsh environmental erosion and providing outstanding barrier properties, effectively blocking water, air, oil, and chemicals. Combined with a water-based polyurethane coating on both sides of the polyethylene fabric, it achieves excellent waterproofing. Thermoplastic polyurethane film has high tensile strength and elongation at break, maintaining material stability over a wide deformation range, and exhibits superior abrasion resistance compared to many other polymers. Its weather aging resistance is also excellent. EPDM rubber is resistant to aging, corrosion, heat, and water. The waterproof membrane is characterized by its high elasticity and resistance to steam. By incorporating an impact-resistant layer 101 and a weather-resistant layer 102, the service life of the waterproof membrane for outdoor use can be effectively improved. The basalt fiber mesh has the characteristics of high strength and high modulus of high-tech fibers. The two layers of basalt fiber mesh can greatly improve the crack resistance of the waterproof membrane. Furthermore, the mesh of the basalt fiber mesh is set in a regular hexagonal shape, which provides a certain amount of space for the deformation of the waterproof membrane, allowing it to maintain its flexibility. The high resilience of natural rubber allows the waterproof membrane to recover quickly after being stretched and deformed.

Claims

1. A crack-resistant waterborne polyurethane waterproof membrane, characterized in that: The material includes a central layer (3), an outer protective layer (1), and an adhesive layer (5). The central layer (3) is disposed between the outer protective layer (1) and the adhesive layer (5). The upper and lower side walls of the central layer (3) are respectively provided with a first crack-resistant layer (2) and a second crack-resistant layer (4). The outer protective layer (1) is disposed on the side of the first crack-resistant layer (2) away from the central layer (3). The adhesive layer (5) is disposed on the side of the second crack-resistant layer (4) away from the central layer (3). A release film (6) is disposed on the side of the adhesive layer (5) away from the second crack-resistant layer (4). The central layer (3) includes a base layer (301) and an upper coating layer (302) and a lower coating layer (303) respectively disposed on the upper and lower sides of the base layer (301). The upper coating layer (302) and the lower coating layer (303) are respectively disposed on the upper and lower sides of the base layer (301). The outer protective layer (1) is connected to the first crack-resistant layer (2) and the second crack-resistant layer (4) on the opposite side of the layer (303). The outer protective layer (1) includes a weather-resistant layer (102) and an impact-resistant layer (101) distributed vertically. The side of the impact-resistant layer (101) away from the weather-resistant layer (102) is connected to the first crack-resistant layer (2). The first crack-resistant layer (2) includes a first fiber woven mesh (201) and a first upper cover layer (202) and a first lower cover layer (203) respectively disposed on the upper and lower sides of the first fiber woven mesh (201). The second crack-resistant layer (4) includes a second fiber woven mesh (401) and a second upper cover layer (402) and a second lower cover layer (403) respectively disposed on the upper and lower sides of the second fiber woven mesh (401).

2. The crack-resistant waterborne polyurethane waterproof membrane according to claim 1, characterized in that: Both the first fiber woven mesh (201) and the second fiber woven mesh (401) are basalt fiber meshes, and the meshes of both the first fiber woven mesh (201) and the second fiber woven mesh (401) are regular hexagonal.

3. The crack-resistant waterborne polyurethane waterproof membrane according to claim 2, characterized in that: The first upper cover layer (202), the first lower cover layer (203), the second upper cover layer (402), and the second lower cover layer (403) are all made of natural rubber.

4. The crack-resistant waterborne polyurethane waterproof membrane according to claim 3, characterized in that: Both the upper coating (302) and the lower coating (303) are water-based polyurethane coatings.

5. The crack-resistant waterborne polyurethane waterproof membrane according to claim 4, characterized in that: The impact-resistant layer (101) is EPDM rubber.

6. The crack-resistant waterborne polyurethane waterproof membrane according to claim 5, characterized in that: The weather-resistant layer (102) is a thermoplastic polyurethane film.

7. The crack-resistant waterborne polyurethane waterproof membrane according to claim 6, characterized in that: The base layer (301) is polyethylene cloth.

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