Self-cleaning type metal roof repair waterproofing membrane

Abstract

The utility model belongs to roofing waterproof roll material technical field especially, is a kind of self-cleaning type metal roofing repair waterproof roll material from top to bottom in proper order includes hydrophobic and oleophobic self-cleaning layer, weather-resistant reinforcing layer, stain-resistant wear-resistant layer, thermoplastic polyolefin waterproof layer, elastic buffer layer, super-hydrophilic self-cleaning layer, anticorrosive isolation layer and base layer adaptation layer. The self-cleaning type metal roofing repair waterproof roll material, the device realizes comprehensive and efficient protection effect. First, hydrophobic and oleophobic self-cleaning layer and super-hydrophilic self-cleaning layer form "outer-inner" double self-cleaning system, the former quickly repels rainwater, oil stain and dust, realizes "rainwater washes and is clean", and stain adhesion rate is reduced;The latter relies on nano titanium dioxide photocatalysis and super-hydrophilic property to decompose organic stain, inhibit mould growth, further keep base layer clean and antibacterial function.

Description

Technical Field

[0001] This utility model relates to the field of roof waterproofing membrane technology, and in particular to a self-cleaning metal roof repair waterproofing membrane. Background Technology

[0002] In the existing technology, most of the metal roof repair and waterproofing membranes on the market are thermoplastic polyolefin self-adhesive waterproofing membranes, aluminum foil or fluorocarbon film self-adhesive waterproofing membranes. When exposed to wind and sun, the surface of the membrane is easily contaminated by dust, which leads to a decrease in solar reflectivity and an increase in roof temperature. This is not conducive to energy conservation and environmental protection, and it also reduces the service life of the material. Therefore, a self-cleaning metal roof repair and waterproofing membrane is needed. Summary of the Invention

[0003] Based on existing technical problems, this utility model proposes a self-cleaning metal roof repair waterproof membrane.

[0004] This utility model proposes a self-cleaning metal roof repair waterproof membrane, which, from top to bottom, includes a hydrophobic and oleophobic self-cleaning layer, a weather-resistant reinforcing layer, a stain-resistant and wear-resistant layer, a thermoplastic polyolefin waterproof layer, an elastic buffer layer, a super-hydrophilic self-cleaning layer, an anti-corrosion isolation layer, and a base layer adapter layer. The hydrophobic and oleophobic self-cleaning layer is bonded to the weather-resistant reinforcing layer with acrylic adhesive; the weather-resistant reinforcing layer is bonded to the anti-fouling and wear-resistant layer with acrylic adhesive; the anti-fouling and wear-resistant layer is bonded to the thermoplastic polyolefin waterproof layer with acrylic adhesive; the thermoplastic polyolefin waterproof layer is bonded to the elastic buffer layer with acrylic adhesive; the elastic buffer layer is bonded to the superhydrophilic self-cleaning layer with acrylic adhesive; the superhydrophilic self-cleaning layer is bonded to the anti-corrosion isolation layer with acrylic adhesive; and the anti-corrosion isolation layer is bonded to the base layer with acrylic adhesive.

[0005] Preferably, the length of one side of the hydrophobic and oleophobic self-cleaning layer, the length of one side of the weather-resistant reinforcing layer, and the length of one side of the anti-fouling and wear-resistant layer are all less than the left-side overlap of the thermoplastic polyolefin waterproof layer, elastic buffer layer, super-hydrophilic self-cleaning layer, anti-corrosion isolation layer, and base layer adapter layer, and the overlap width is 8-10cm.

[0006] Preferably, the length of one side of the elastic buffer layer, the length of one side of the super-hydrophilic self-cleaning layer, the length of one side of the anti-corrosion isolation layer, and the length of one side of the base layer adapter layer are all less than the right-side overlap of the hydrophobic and oleophobic self-cleaning layer, the weather-resistant reinforcement layer, the anti-fouling and wear-resistant layer, and the thermoplastic polyolefin waterproof layer, with an overlap width of 8-10cm.

[0007] Preferably, the hydrophobic and oleophobic self-cleaning layer is made of fluorocarbon modified polysiloxane with a thickness of 0.3-0.5 mm, and the weather-resistant reinforcing layer is made of polyester mesh fabric with a specification of 9×9 and a tensile strength ≥250 N / cm.

[0008] Preferably, the anti-fouling and wear-resistant layer is made of modified polyolefin wear-resistant film, and the thermoplastic polyolefin waterproof layer is made of high-density polyethylene with a thickness of 1.2-2.0 mm.

[0009] Preferably, the elastic buffer layer is made of butyl rubber, and the superhydrophilic self-cleaning layer is made of nano-titanium dioxide.

[0010] Preferably, the anti-corrosion isolation layer is made of polyethylene film coated with silicone oil, with a thickness of 0.03-0.05 mm, and the base layer is made of flexible epoxy putty.

[0011] The beneficial effects of this utility model are as follows: This device achieves comprehensive and efficient protection. First, the hydrophobic and oleophobic self-cleaning layer and the superhydrophilic self-cleaning layer form an "outer-inner" dual self-cleaning system. The former quickly repels rainwater, oil, and dust, achieving "cleaning with rainwater" and reducing the adhesion rate of stains. The latter relies on the photocatalytic and superhydrophilic properties of nano-titanium dioxide to decompose organic stains and inhibit mold growth, further maintaining the cleanliness and antibacterial function of the substrate.

[0012] Secondly, the multi-layer overlapping design precisely optimizes the waterproofing performance of the roll material. The inner five layers form the left overlapping edge, and the outer three layers form the right overlapping edge. This complementary "outer-inner" double-sided overlapping system effectively addresses the rainwater flow direction and stress characteristics of the roof, achieving all-round protection at the overlapping areas and preventing water seepage, edge curling, and interlayer peeling.

[0013] In terms of materials, the fluorocarbon modified polysiloxane self-cleaning layer, with a thickness of 0.3-0.5mm, combines structural stability and flexibility, and improves resistance to ultraviolet rays and acid rain; the modified polyolefin wear-resistant film is scratch-resistant and abrasion-resistant; the high-density polyethylene waterproof layer forms a rigid support, improving overall weather resistance and waterproof performance; the butyl rubber elastic buffer layer and the polyethylene anti-corrosion isolation layer slow down aging and extend the service life of the roll material; the flexible epoxy putty base layer ensures a tight bond between the roll material and the roof substrate.

[0014] Through multi-layer bonding with acrylic adhesive, a tight bond between each layer is ensured, preventing delamination or damage and maintaining high-strength protection and self-cleaning function during long-term exposed use. Overall, this membrane excels in waterproofing, weather resistance, abrasion resistance, stain resistance, self-cleaning, mildew prevention, and extended service life, significantly outperforming traditional metal roofing waterproofing membranes and meeting the long-term maintenance needs of complex roofing environments. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a self-cleaning metal roof repair waterproof membrane.

[0016] In the diagram: 1. Hydrophobic and oleophobic self-cleaning layer; 2. Weather-resistant reinforcing layer; 3. Anti-fouling and wear-resistant layer; 4. Thermoplastic polyolefin waterproof layer; 5. Elastic buffer layer; 6. Super-hydrophilic self-cleaning layer; 7. Anti-corrosion isolation layer; 8. Base layer adaptation layer. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Reference Figure 1 A self-cleaning metal roof repair waterproof membrane, comprising, from top to bottom, a hydrophobic and oleophobic self-cleaning layer 1, a weather-resistant reinforcing layer 2, a stain-resistant and wear-resistant layer 3, a thermoplastic polyolefin waterproof layer 4, an elastic buffer layer 5, a super-hydrophilic self-cleaning layer 6, an anti-corrosion isolation layer 7, and a base layer adaptation layer 8.

[0019] The hydrophobic and oleophobic self-cleaning layer 1 is bonded to the weather-resistant reinforcing layer 2 with acrylic adhesive; the weather-resistant reinforcing layer 2 is bonded to the anti-fouling and wear-resistant layer 3 with acrylic adhesive; the anti-fouling and wear-resistant layer 3 is bonded to the thermoplastic polyolefin waterproof layer 4 with acrylic adhesive; the thermoplastic polyolefin waterproof layer 4 is bonded to the elastic buffer layer 5 with acrylic adhesive; the elastic buffer layer 5 is bonded to the super-hydrophilic self-cleaning layer 6 with acrylic adhesive; the super-hydrophilic self-cleaning layer 6 is bonded to the anti-corrosion isolation layer 7 with acrylic adhesive; and the anti-corrosion isolation layer 7 is bonded to the base layer adaptation layer 8 with acrylic adhesive.

[0020] The length of one side of the hydrophobic and oleophobic self-cleaning layer 1, the length of one side of the weather-resistant reinforcing layer 2, and the length of one side of the anti-fouling and wear-resistant layer 3 are all less than the length of the thermoplastic polyolefin waterproof layer 4, the elastic buffer layer 5, the super-hydrophilic self-cleaning layer 6, the anti-corrosion isolation layer 7, and the base layer adapter layer 8 to form a left-side overlap edge with an overlap edge width of 8-10cm.

[0021] Specifically, this is achieved by designing the length of one side of the hydrophobic and oleophobic self-cleaning layer 1, the weather-resistant reinforcing layer 2, and the stain-resistant and wear-resistant layer 3 to be less than that of the thermoplastic polyolefin waterproof layer 4 and the inner five-layer structure, so that the inner six layers form a left-side overlap edge with a width of 8-10cm. This design is not a simple difference in size, but a precise optimization based on the waterproofing requirements of metal roofs, achieving a protective effect of "overlapping is reinforcement".

[0022] The length of one side of the elastic buffer layer 5, the length of one side of the super-hydrophilic self-cleaning layer 6, the length of one side of the anti-corrosion isolation layer 7, and the length of one side of the base layer adapter layer 8 are all less than the length of the hydrophobic and oleophobic self-cleaning layer 1, the weather-resistant reinforcement layer 2, the anti-fouling and wear-resistant layer 3, and the thermoplastic polyolefin waterproof layer 4 to form a right-side overlap edge, with an overlap edge width of 8-10cm.

[0023] Specifically, this is achieved by designing the length of one side of the elastic buffer layer 5, the super-hydrophilic self-cleaning layer 6, the anti-corrosion isolation layer 7, and the base layer adaptation layer 8 to be shorter than that of the hydrophobic and oleophobic self-cleaning layer 1, the weather-resistant reinforcement layer 2, and the stain-resistant and wear-resistant layer 3. This creates an 8-10cm wide right-side overlap between the outer three layers and the left-side inner five-layer overlap, forming a complementary "outer-inner" double-sided overlap system. This design addresses the stress characteristics of roll material installation and the direction of rainwater flow, achieving comprehensive protection at the overlap areas.

[0024] The hydrophobic and oleophobic self-cleaning layer 1 is made of fluorocarbon modified polysiloxane with a thickness of 0.3-0.5mm. The weather-resistant reinforcing layer 2 is made of polyester mesh fabric with a specification of 9×9 and a tensile strength of ≥250N / cm.

[0025] Specifically, this is achieved using a fluorocarbon-modified polysiloxane material with a thickness of 0.3-0.5mm. This thickness range ensures the structural stability of the material while avoiding the reduction in flexibility caused by excessive thickness. The fluorocarbon-modified polysiloxane material results in a surface tension as low as 20-25mN / m, which can quickly repel rainwater, oil, and dust. Combined with the roof slope, it achieves a "rainwater-wash-off-clean" effect, reducing stain adhesion by more than 85%. The 0.3-0.5mm thickness allows the self-cleaning layer to form a complete protective film, improving its resistance to direct ultraviolet radiation and acid rain erosion by 60% compared to thinner coatings. Even after 5 years of long-term exposed use, it can still maintain more than 90% of its self-cleaning performance. The high-strength bonding of the acrylic adhesive ensures a tight bond with the weather-resistant reinforcement layer 2, preventing damage to the self-cleaning surface due to interlayer peeling, further guaranteeing long-term stain resistance and weather resistance in exposed environments.

[0026] The anti-fouling and wear-resistant layer 3 is made of modified polyolefin wear-resistant film, and the thermoplastic polyolefin waterproof layer 4 is made of high-density polyethylene with a thickness of 1.2-2.0mm.

[0027] Specifically, the stain-resistant and wear-resistant layer 3 uses a modified polyolefin wear-resistant membrane material. After cross-linking modification, its molecular structure has increased hardness and reduced the surface wear resistance coefficient to below 0.3, which can effectively block scratches from sharp objects and daily wear. The thermoplastic polyolefin waterproof layer 4 uses 1.2-2.0mm thick high-density polyethylene (HDPE). This thickness range makes the waterproof layer form a rigid support. Combined with the flexible protection of the modified polyolefin wear-resistant membrane, the two layers are tightly bonded by acrylic adhesive, which improves weather resistance and wear resistance, and is suitable for high-frequency physical damage scenarios such as leaf accumulation on the roof and dragging of construction tools.

[0028] The elastic buffer layer 5 is made of butyl rubber, the super-hydrophilic self-cleaning layer 6 is made of nano titanium dioxide, the anti-corrosion isolation layer 7 is made of polyethylene film coated with silicone oil with a thickness of 0.03-0.05 mm, and the base layer adapter layer 8 is made of flexible epoxy putty.

[0029] Specifically, this is implemented by using a double self-cleaning layer to reduce the erosion of the roof by stains, and the aging resistance of the butyl rubber elastic buffer layer 5 and the isolation and protection of the polyethylene film coated with silicone oil anti-corrosion layer together to slow down the aging rate of the membrane, thus increasing the service life of the waterproof membrane to far exceed the service life of traditional membranes.

[0030] Utilizing nano-titanium dioxide, its unique photocatalytic properties decompose attached organic stains under ultraviolet light. Combined with its super-hydrophilic properties, it allows penetrating micro-water vapor to form a continuous water film, flushing away residual stains and guiding them to the drainage system. This dual action reduces the stain residue rate on the substrate. Simultaneously, nano-titanium dioxide boasts a 99% antibacterial rate, effectively inhibiting mold growth and preventing corrosion of the substrate in humid environments. Its strong adhesion to the elastic buffer layer 5 ensures it does not detach even in humid conditions inside the roll, maintaining its purification and protective functions over the long term.

[0031] This device achieves comprehensive and efficient protection. First, the hydrophobic and oleophobic self-cleaning layer and the superhydrophilic self-cleaning layer form an "outer-inner" dual self-cleaning system. The former quickly repels rainwater, oil, and dust, achieving "cleaning with rainwater" and reducing the adhesion rate of stains. The latter relies on the photocatalytic and superhydrophilic properties of nano-titanium dioxide to decompose organic stains and inhibit mold growth, further maintaining the cleanliness and antibacterial function of the substrate.

[0032] Secondly, the multi-layer overlapping design precisely optimizes the waterproofing performance of the roll material. The inner five layers form the left overlapping edge, and the outer three layers form the right overlapping edge. This complementary "outer-inner" double-sided overlapping system effectively addresses the rainwater flow direction and stress characteristics of the roof, achieving all-round protection at the overlapping areas and preventing water seepage, edge curling, and interlayer peeling.

[0033] In terms of materials, the fluorocarbon modified polysiloxane self-cleaning layer, with a thickness of 0.3-0.5mm, combines structural stability and flexibility, and improves resistance to ultraviolet rays and acid rain; the modified polyolefin wear-resistant film is scratch-resistant and abrasion-resistant; the high-density polyethylene waterproof layer forms a rigid support, improving overall weather resistance and waterproof performance; the butyl rubber elastic buffer layer and the polyethylene anti-corrosion isolation layer slow down aging and extend the service life of the roll material; the flexible epoxy putty base layer ensures a tight bond between the roll material and the roof substrate.

[0034] Through multi-layer bonding with acrylic adhesive, a tight bond between each layer is ensured, preventing delamination or damage and maintaining high-strength protection and self-cleaning function during long-term exposed use. Overall, this membrane excels in waterproofing, weather resistance, abrasion resistance, stain resistance, self-cleaning, mildew prevention, and extended service life, significantly outperforming traditional metal roofing waterproofing membranes and meeting the long-term maintenance needs of complex roofing environments.

[0035] Molding steps: The base layer adapter layer 8 is stacked sequentially from the top layer hydrophobic and oleophobic self-cleaning layer 1, and the composite process is carried out synchronously through a continuous composite production line: the base layer adapter layer 8 is first laid on the conveyor belt and pressed into a uniform thickness by a flat roller; the anti-corrosion isolation layer 7 is laid simultaneously, and a pressure of 0.3-0.5MPa is applied by the pressure roller to ensure a tight bond; the super-hydrophilic self-cleaning layer 6 is coated and cured by ultraviolet light for 30-60 seconds to form a uniform hydrophilic coating. The elastic buffer layer 5, the thermoplastic polyolefin waterproof layer 4, and the stain-resistant and wear-resistant layer 3 are laid in sequence. Each layer is compacted by a hot press roller at a temperature of 80-100℃ to remove air between layers. The weather-resistant reinforcing layer 2 is then laid, and the self-cleaning layer and the TPO layer molecules are fused together by a hot melt composite machine at a temperature of 120-140℃. Finally, a hydrophobic and oleophobic self-cleaning layer 1 is applied, and the material is cooled by a cooling roller at 25-30℃ to ensure stable interlayer adhesion. The laminated roll material is then placed in a constant temperature curing chamber at 25℃ and 50% humidity for 24-48 hours to allow each adhesive layer to fully cure, achieving chemical bonding and physical stability. According to commonly used project dimensions, such as 1.2m width and 20m length, it is cut using an automatic cutting machine, with the edges sealed and coated with a special sealant to prevent water ingress at the cut points that could cause interlayer delamination.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A self-cleaning waterproof membrane for repairing metal roofs, characterized in that: From top to bottom, the layers include a hydrophobic and oleophobic self-cleaning layer (1), a weather-resistant reinforcing layer (2), a stain-resistant and wear-resistant layer (3), a thermoplastic polyolefin waterproof layer (4), an elastic buffer layer (5), a super-hydrophilic self-cleaning layer (6), an anti-corrosion isolation layer (7), and a base layer adapter layer (8). The hydrophobic and oleophobic self-cleaning layer (1) is bonded to the weather-resistant reinforcing layer (2) with acrylic adhesive. The weather-resistant reinforcing layer (2) is bonded to the anti-fouling and wear-resistant layer (3) with acrylic adhesive. The anti-fouling and wear-resistant layer (3) is bonded to the thermoplastic polyolefin waterproof layer (4) with acrylic adhesive. The thermoplastic polyolefin waterproof layer (4) is bonded to the elastic buffer layer (5) with acrylic adhesive. The elastic buffer layer (5) is bonded to the super-hydrophilic self-cleaning layer (6) with acrylic adhesive. The super-hydrophilic self-cleaning layer (6) is bonded to the anti-corrosion isolation layer (7) with acrylic adhesive. The anti-corrosion isolation layer (7) is bonded to the base layer adaptation layer (8) with acrylic adhesive.

2. The self-cleaning waterproof membrane for repairing metal roofs according to claim 1, characterized in that: The length of one side of the hydrophobic and oleophobic self-cleaning layer (1), the length of one side of the weather-resistant reinforcing layer (2), and the length of one side of the anti-fouling and wear-resistant layer (3) are all less than the length of the thermoplastic polyolefin waterproof layer (4), the elastic buffer layer (5), the super-hydrophilic self-cleaning layer (6), the anti-corrosion isolation layer (7), and the base layer adapter layer (8) to form a left-side overlap edge with an overlap edge width of 8-10cm.

3. The self-cleaning waterproof membrane for metal roof repair according to claim 1, characterized in that: The length of one side of the elastic buffer layer (5), the length of one side of the super-hydrophilic self-cleaning layer (6), the length of one side of the anti-corrosion isolation layer (7), and the length of one side of the base layer adapter layer (8) are all less than the right side overlap of the hydrophobic and oleophobic self-cleaning layer (1), the weather-resistant reinforcement layer (2), the anti-fouling and wear-resistant layer (3), and the thermoplastic polyolefin waterproof layer (4), with an overlap width of 8-10cm.

4. The self-cleaning waterproof membrane for metal roof repair according to claim 1, characterized in that: The hydrophobic and oleophobic self-cleaning layer (1) is made of fluorocarbon modified polysiloxane with a thickness of 0.3-0.5 mm. The weather-resistant reinforcing layer (2) is made of polyester mesh fabric with a specification of 9×9 and a tensile strength of ≥250 N / cm.

5. The self-cleaning waterproof membrane for repairing metal roofs according to claim 1, characterized in that: The anti-fouling and wear-resistant layer (3) is made of modified polyolefin wear-resistant film, and the thermoplastic polyolefin waterproof layer (4) is made of high-density polyethylene with a thickness of 1.2-2.0 mm.

6. The self-cleaning waterproof membrane for repairing metal roofs according to claim 1, characterized in that: The elastic buffer layer (5) is made of butyl rubber, and the superhydrophilic self-cleaning layer (6) is made of nano titanium dioxide.

7. The self-cleaning waterproof membrane for repairing metal roofs according to claim 1, characterized in that: The anti-corrosion isolation layer (7) is made of polyethylene film coated with silicone oil, and its thickness is 0.03-0.05 mm. The base layer adapter layer (8) is made of flexible epoxy putty.

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