Colored waterproof coiled material capable of being bonded with post-poured concrete
By setting up self-adhesive and anti-adhesive layers with significant color differences on the overlapping edges of the waterproof roll, the problem of insufficient width of the overlapping edges of the roll is solved, and rapid discovery and repair are achieved, the risk of waterproof failure is reduced, and the quality of the waterproof project is ensured.
Patent Information
- Application Number
- CN202421585713.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-07-05
AI Technical Summary
During the construction process of existing waterproof coils, the overlapping edges of two adjacent coils are prone to insufficient width, resulting in waterproof failure. Moreover, due to the similar colors, it is difficult to detect whether the width of the overlapping edge meets the requirements through visual inspection, which increases the risk of waterproof failure.
A colored waterproof coil is designed. By setting significantly different overlapping self-adhesive and anti-adhesive layers on the overlapping sides of the polymer sheet layer, the color difference between the outer surface of the overlapping side self-adhesive and the anti-adhesive layer is obvious. When the overlap width is insufficient, a color difference is formed that is visible to the naked eye, which is convenient for quickly discovering and repairing weak areas.
It can quickly detect and repair areas with insufficient overlapping edge width during construction, reduce the risk of waterproof failure and ensure the quality of waterproofing projects.
Smart Images
Figure CN223256068U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of waterproof coiled materials, and more specifically relates to a colored waterproof coiled material that can be bonded to post-cast concrete. Background Art
[0002] The membrane used for waterproofing underground projects that can be bonded to post-poured concrete is generally called pre-laid waterproof membrane. There are usually two major categories: one is modified asphalt type and the other is polymer type. The modified asphalt type generally uses a sand surface anti-adhesion functional layer. The sand surface color is generally dark, such as black or dark gray, and the sand surface color is the same or similar to the color of the long overlapping edge; the other type of polymer type (such as HDPE, TPO, EVA, PVC) generally uses a light-colored sand surface or a light-colored (white or transparent) coating surface for the anti-adhesion surface. The anti-adhesion surface is the same or similar in color to the long overlapping edge. Therefore, during construction, if the two adjacent membranes are not placed flush, or the straightness of the membranes is insufficient, the long overlapping edges of the two adjacent membranes will be misaligned or the overlapping width will be insufficient after the long overlapping edges are overlapped. The national standard GB55030-2022 "General Specification for Waterproofing of Buildings and Municipal Engineering" requires that the overlapping edge width must meet 8cm. The overlapping edge bonding area that does not meet the above width requirements will bring the risk of waterproofing failure.
[0003] To ensure waterproofing continuity and reliability, the overlap of waterproofing membranes plays a crucial role. In practice, the probability of waterproofing failure at the overlap is far greater than at the larger surface of the membrane. Traditional membranes have similar colors in their anti-sticking areas and overlap areas, making it difficult to verify whether the overlap width meets construction requirements through individual inspections after installation. If insufficient overlap width can be easily detected during factory acceptance inspections and then effectively strengthened in these areas, the consequences of waterproofing failure caused by insufficient overlap width can be greatly reduced, thereby reducing the risk of waterproofing failure across the entire waterproofing layer. Utility Model Content
[0004] The purpose of the utility model is to address the deficiencies in the prior art and provide a colored waterproof membrane that can be bonded to post-cast concrete. When two adjacent waterproof membranes are overlapped, when the overlap width of the membranes is greater than or equal to the overlap width requirement, the colors of the areas on both sides of the overlap seam of the two membranes are consistent. When the overlap width of the membranes is less than the overlap width, different colors that can be distinguished by the naked eye will be displayed on both sides of the overlap area of the two membranes, thereby making it easy to find areas where the overlap width does not meet the requirements, facilitating the search for weak waterproof areas after construction and repairing them before proceeding to the next process.
[0005] In order to achieve the above object, the utility model provides a colored waterproof membrane that can be bonded to post-cast concrete, comprising:
[0006] An anti-adhesive layer, an anti-adhesive self-adhesive layer, and a polymer sheet layer are sequentially arranged from top to bottom, wherein the front overlapping area of the polymer sheet layer is provided with an overlapping edge self-adhesive, the outer surface color of the overlapping edge self-adhesive after being composited with the polymer sheet layer is different from the color of the anti-adhesive layer, the reflectivity of the anti-adhesive layer is less than 50%, the surface color difference of the anti-adhesive layer ΔE*ab≤2, and the surface color difference between the anti-adhesive layer and the overlapping edge self-adhesive ΔE*ab≥5;
[0007] When adjacent waterproof membranes are overlapped, if the overlap width is not less than the width of the front overlap region, there is no color difference at the overlap of the waterproof membranes; if the overlap width is less than the width of the front overlap region, there is a color difference at the overlap of the waterproof membranes;
[0008] The outer surface of the overlapping edge self-adhesive is covered with a first isolation film.
[0009] Optionally, the thickness deviation of the anti-sticking layer is no more than 5 μm.
[0010] Optionally, the anti-sticking layer comprises a weather-resistant pigment, which is an organic pigment or an inorganic pigment.
[0011] Optionally, the organic pigment includes an azo pigment, a phthalocyanine pigment, a naphthol pigment, a quinacridone pigment, or a dioxazine pigment.
[0012] Optionally, the thickness of the anti-sticking layer is 0.5-500 μm, and the thickness of the polymer sheet layer is 0.05-2.0 mm.
[0013] Optionally, a second isolation film is provided on the back side of the polymer sheet layer, and a back-coated self-adhesive adhesive is provided between the second isolation film and the polymer sheet layer.
[0014] Optionally, the area of the back-coated self-adhesive is less than or equal to the area of the polymer sheet layer.
[0015] The utility model provides a colored waterproof membrane that can be bonded to post-cast concrete, and its beneficial effect is that: the waterproof membrane is provided with an anti-sticking layer on the front side of the polymer sheet layer, and after the overlapping edge self-adhesive is compounded with the polymer sheet layer, the outer surface of the overlapping edge self-adhesive and the anti-sticking layer have significantly different colors, when the overlapping area of adjacent waterproof membranes does not meet the overlapping width requirements, obvious color difference visible to the naked eye will appear on the surface of the overlapping area, during the inspection and repair process, it is easy to quickly find the weak waterproof area, which is convenient for repairing between the next process, ensuring that the quality of the waterproof project meets the standards.
[0016] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.
[0018] Figure 1 The cross-sectional structure diagram of a colored waterproof membrane that can be bonded to post-cast concrete according to the first embodiment of the utility model is shown.
[0019] Figure 2 The cross-sectional structure diagram of a colored waterproof membrane that can be bonded to post-cast concrete according to the second embodiment of the present utility model is shown.
[0020] Figure 3 The cross-sectional structure diagram of a colored waterproof membrane that can be bonded to post-cast concrete according to the third embodiment of the present utility model is shown.
[0021] Figure 4 The cross-sectional diagram shows a colored waterproof membrane that can be bonded to post-cast concrete according to the first embodiment of the present utility model when adjacent overlaps meet width requirements.
[0022] Figure 5 A front view of a colored waterproof membrane that can be bonded to post-cast concrete according to the first embodiment of the present utility model is shown when adjacent overlaps meet width requirements.
[0023] Figure 6 A cross-sectional schematic diagram is shown of a colored waterproof membrane that can be bonded to post-cast concrete according to the first embodiment of the present utility model when adjacent overlaps do not meet the width requirement.
[0024] Figure 7 A front view of a colored waterproof membrane that can be bonded to post-cast concrete according to the first embodiment of the present utility model is shown when adjacent overlaps do not meet width requirements.
[0025] Description of reference numerals:
[0026] 1. Polymer sheet layer; 2. Anti-sticking layer; 3. Front overlap area; 4. Overlap edge self-adhesive; 5. Reverse self-adhesive layer; 6. First release film; 7. Back-coated self-adhesive; 8. Back overlap area; 9. Second release film. DETAILED DESCRIPTION
[0027] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.
[0028] The utility model provides a colored waterproof membrane that can be bonded to post-cast concrete, comprising:
[0029] The anti-adhesive layer, the reverse self-adhesive layer and the polymer sheet layer are sequentially arranged from top to bottom, the front overlapping area of the polymer sheet layer is provided with an overlapping edge self-adhesive, the outer surface color of the overlapping edge self-adhesive after being laminated to the polymer sheet layer is different from the color of the anti-adhesive layer, the reflectivity of the anti-adhesive layer is less than 50%, the surface color difference of the anti-adhesive layer ΔE*ab≤2, and the surface color difference between the anti-adhesive layer and the overlapping edge self-adhesive ΔE*ab≥5;
[0030] When adjacent waterproof membranes overlap each other, if the overlap width is not less than the width of the front overlap area, there will be no color difference at the overlap of the waterproof membranes. If the overlap width is less than the width of the front overlap area, there will be a color difference at the overlap of the waterproof membranes.
[0031] The outer surface of the overlapping edge self-adhesive is covered with a first isolation film.
[0032] Specifically, the colored waterproof roll includes a polymer sheet layer, a self-adhesive and anti-adhesive layer, a release layer and an overlapping edge self-adhesive. The release layer and the overlapping edge self-adhesive are both arranged on the front side of the polymer sheet layer, and the overlapping edge self-adhesive is only arranged in the overlapping area of the polymer sheet layer, while the release layer completely covers the rest of the front area of the polymer sheet layer. When the waterproof roll is being laid, adjacent waterproof rolls will be overlapped up and down, and the upper waterproof roll is required to at least cover the entire overlapping area of the lower waterproof roll, so that the adjacent overlapping waterproof rolls can achieve effective waterproofing and water-blocking effects at the overlapping position. If the upper waterproof roll does not completely cover the overlapping area of the lower waterproof roll, the overlapping edge self-adhesive of the lower waterproof roll will be exposed on the surface of the waterproof roll, resulting in obvious color difference that can be distinguished by the naked eye, which is easy to be discovered and convenient for remediation in subsequent processes. In addition, the first isolation film is used to protect the self-adhesive glue at the overlapping edge, so as to ensure the surface cleanliness of the self-adhesive glue at the overlapping edge before the roll material is laid, thereby avoiding a decrease in viscosity.
[0033] The commonly used method for preparing coated polymer pre-laid waterproofing membranes is to spray liquid coating onto the surface of the anti-sticky hot melt adhesive, and then dry it to obtain a release layer. Under this process, the coating thickness uniformity is low, and there may even be glue exposure, making it difficult to achieve color uniformity. Currently, it is common to use a white or light-colored, transparent release layer and an overlapping edge self-adhesive composite with a white polymer sheet layer, and the surface color is similar. Therefore, the color difference between the release layer of the membrane with a white or light-colored, transparent coating and the outer surface of the overlapping edge adhesive is not obvious visually; at the same time, the spray equipment pipeline is difficult to clean thoroughly during the color change process, which is not conducive to flexible color switching. Therefore, a release layer with a significantly different color from the outer surface of the self-adhesive is set, while ensuring the thickness accuracy of the release layer, ensuring that the color displayed by the release layer does not have an uneven color effect, and achieving a significant difference between the color of the release layer and the outer surface color of the overlapping edge self-adhesive.
[0034] In this waterproofing membrane, the polymer sheet layer provides physical strength, toughness, and a continuous waterproof layer. The polymer sheet has a flat surface and can be a homogeneous film or a multilayer composite film selected from blown film, cast film, extruded sheet, woven material, non-woven fabric, and laminated fabric. When the polymer sheet is a homogeneous film, its material is polyolefin homopolymer, polyolefin copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyester, polyamide, or polyurethane. When the polymer sheet is a multilayer composite film, its material is at least one of polyolefin homopolymer, polyolefin copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyester, polyamide, and polyurethane.
[0035] Specifically, when two adjacent waterproof membranes are overlapped and laid, when the overlap width of the two waterproof membranes is consistent with the overlap area width, the back side of the upper waterproof membrane will be adhered to the surface of the self-adhesive glue of the overlap edge of the lower waterproof membrane, and the width of the overlapping overlap area is consistent with the designed overlap area width. The end face of the polymer sheet layer of the upper waterproof membrane is against the end face of the lower anti-adhesive layer, thus forming a continuous waterproof barrier; when the overlap width of the two waterproof membranes is greater than or equal to the width of the overlap area, the back side of the upper waterproof membrane completely presses the surface of the self-adhesive glue of the overlap edge of the lower waterproof membrane, and the width of the overlapping overlap area is also consistent with the designed overlap area width. In this way, the polymer sheet layer of the upper layer is connected to the anti-adhesive layer of the lower layer, which can also form a waterproof barrier.
[0036] Specifically, the surface of the anti-adhesive layer of the waterproof membrane needs to meet all the requirements of GB / T 23457-2017. In particular, the anti-adhesive layer must have good color uniformity, with no visually discernible color difference, and the color difference must be controlled within ΔE*ab≤2.
[0037] Optionally, the thickness deviation of the anti-sticking layer is no more than 5 μm.
[0038] Specifically, the thickness of the anti-sticking layer is preferably 5 to 100 μm. If you want to achieve the best effect, the thickness can be selected to be 0.5 to 50 μm; in addition, the gram weight range of the anti-sticking layer is 0.5 g / sqm to 500 g / sqm, preferably 5 g / sqm to 200 g / sqm. If you want to achieve the best effect, the optimal gram weight range is 5 g / sqm to 100 g / sqm; the corona value of the anti-sticking layer needs to be higher than 38 dynes.
[0039] Optionally, the anti-sticking layer comprises a weather-resistant pigment, which is an organic pigment or an inorganic pigment.
[0040] Alternatively, the organic pigment includes an azo pigment, a phthalocyanine pigment, a naphthol pigment, a quinacridone pigment, or a dioxazine pigment.
[0041] Specifically, the release layer is produced using a precision coating method that enables precise control of coating thickness. The coating can be applied using tools such as a comma blade, slit coater, or anilox roller. The thickness deviation of the release layer can be controlled within 5 microns, achieving uniform color on the web. Furthermore, precise switching between different colors is possible, minimizing the risk of color mixing and material loss during the switching process. The surface color coating of the release layer can be prepared using either inorganic or organic pigments, with organic pigments being preferred, including azo pigments, phthalocyanine pigments, naphthol pigments, quinacridone pigments, dioxazine pigments, and other pigments primarily composed of organic components.
[0042] Waterproof membranes with a release layer must be suitable for exposed use within a limited timeframe. After 72 hours of xenon arc aging, the reflectance (based on lightness / darkness color indication) must change within 10%, with a color difference of ΔE*ab ≤ 5. Reflectance is measured using a Novo-Shade Duo+ reflectometer in reflectance mode. This reflectance measurement is based on grayscale values, where black is zero. A white plate is the included calibration plate. The color of the release layer and the self-adhesive area of the overlapped edge is indicated using Lab codes, using a D50 illuminant and a 2° field of view.
[0043] The xenon arc lamp aging test method was based on GB / T 18244-2022, "Test Methods for Aging of Building Waterproof Materials": irradiance 60±2W / m² (300nm-400nm), black mark temperature 65±3°C, and relative humidity 50±10%. Simultaneously, the light was applied for 18 minutes every 2 hours, for a cumulative irradiation time of 72 hours±5 minutes.
[0044] The waterproof membrane with the anti-adhesive layer can be bonded to post-cast concrete. The test method for the bonding strength with post-cast concrete is as follows: the test method for the peeling strength with post-cast concrete (untreated and xenon lamp UV treated) in GB / T 23457-2017 is used.
[0045] The anti-sticking layer can be made of at least one of fluorocarbon copolymer coatings, polyurethane coatings, polyacrylate coatings, silane-modified polyurethane coatings, styrene / acrylic (ester) coatings, silicon-containing polyacrylic (ester) coatings, polyvinyl acetate coatings, and ethylene-vinyl acetate coatings. These coatings can be either water-based polymer dispersion coatings or solvent-based coatings. The polymer sheet layer can be made of polyolefin homopolymers, polyolefin copolymers, ethylene-vinyl acetate copolymers, polyvinyl chloride, polyester, polyamide, or polyurethane. The hot melt adhesive in the self-adhesive layer can be styrene block copolymer hot melt pressure-sensitive adhesive, butyl adhesive, acrylic pressure-sensitive adhesive, silane-modified polymer pressure-sensitive adhesive, or polyurethane pressure-sensitive adhesive. The color and transparency of the hot melt adhesive can be adjusted as needed.
[0046] Optionally, the thickness of the anti-sticking layer is 0.5-500 μm, and the thickness of the polymer sheet layer is 0.05-2.0 mm.
[0047] Specifically, the preferred range of the anti-adhesive layer is 0.5-100 μm. For example, the thickness of the anti-adhesive layer to achieve the best effect is 0.5-50 μm. In addition, the thickness of the back-coated self-adhesive layer is independently 0.1-1.5 mm.
[0048] Optionally, a second isolation film is provided on the back side of the polymer sheet layer, and a back-coated self-adhesive adhesive is provided between the second isolation film and the polymer sheet layer.
[0049] Optionally, the back-coated adhesive area is smaller than or equal to the polymer sheet layer.
[0050] Specifically, the back side of the polymer sheet layer is laminated with the back-coated self-adhesive adhesive and the second isolation film to form a composite waterproof roll.
[0051] Example 1
[0052] like Figure 1 、 Figures 4 to 7 As shown, the utility model provides a colored waterproof membrane that can be bonded to post-cast concrete, comprising:
[0053] From top to bottom, a release layer 2, an anti-sticking self-adhesive layer 5, and a polymer sheet layer 1 are sequentially provided. The front overlap region 3 of the polymer sheet layer 1 is provided with an overlapping self-adhesive adhesive 4. The outer surface color of the overlapping self-adhesive adhesive 4 is different from the color of the release layer 2. The reflectivity of the release layer 2 is less than 50%. The surface color difference of the release layer 2 is ΔE*ab≤2. The outer surface color difference ΔE*ab between the release layer 2 and the overlapping self-adhesive adhesive 4 is ΔE*ab≥5. The bonding strength with the post-cast concrete is greater than 2N / mm before and after xenon lamp treatment.
[0054] When adjacent waterproof membranes are overlapped, if the overlap width is not less than the width of the front overlap area 3, there is no color difference at the overlap of the waterproof membranes. If the overlap width is less than the width of the front overlap area 3, there is a color difference at the overlap of the waterproof membranes.
[0055] The outer surface of the overlapping edge self-adhesive 4 is covered with a first isolation film 6 .
[0056] In this embodiment, the thickness deviation of the anti-sticking layer 2 is no more than 5 μm.
[0057] In this embodiment, the composition of the anti-sticking layer 2 includes a weather-resistant pigment, which is an organic pigment or an inorganic pigment.
[0058] In this embodiment, the organic pigments include azo pigments, phthalocyanine pigments, naphthol pigments, quinacridone pigments, and dioxazine pigments.
[0059] In this embodiment, the thickness of the anti-adhesive layer 2 is 0.5-500 μm, and the thickness of the polymer sheet layer 1 is 0.05-2.0 mm.
[0060] In summary, the waterproof membrane is provided with an overlapping edge self-adhesive adhesive 4 and an anti-adhesive layer 2 on the front overlap area 3 and non-front overlap area of the polymer sheet layer 1, respectively. The outer surface of the overlapping edge self-adhesive adhesive 4 and the anti-adhesive layer 2 have a significant color difference. When the overlapping width of adjacent membranes meets the overlapping width, the upper layer of the waterproof membrane can completely cover the overlapping edge self-adhesive adhesive 4 of the lower layer of the waterproof membrane. In this way, when observing from the front of the waterproof membrane, only the color of the anti-adhesive layer 2 is visible. When the overlapping width of adjacent membranes does not meet the overlapping width, the outer surface of the overlapping edge self-adhesive adhesive 4 of the lower layer of the waterproof membrane will be exposed on the front side of the waterproof membrane, making it easy to observe the color difference, so that weak waterproof areas can be quickly found. At the same time, the waterproof membrane has the performance characteristic of being exposed for a limited time. The color difference after xenon lamp treatment and water immersion treatment is less than 2, and the bonding strength with post-cast concrete is greater than 2N / mm before and after xenon lamp treatment.
[0061] Example 2
[0062] like Figure 2 As shown, the utility model provides a colored waterproof membrane that can be bonded to post-cast concrete, and also includes:
[0063] In this embodiment, a second isolation film 9 is provided on the back side of the polymer sheet layer 1 , and a back-coated self-adhesive adhesive 7 is provided between the second isolation film 9 and the polymer sheet layer 1 .
[0064] In this embodiment, the area of the back-coated self-adhesive 7 is the same as the front overlapping area 3 of the polymer sheet layer 1 .
[0065] Example 3
[0066] like Figure 3 As shown, the utility model provides a colored waterproof membrane that can be bonded to post-cast concrete, and also includes:
[0067] In this embodiment, the area of the back-coated self-adhesive 7 covers the entire back side of the polymer sheet layer 1 .
[0068] The performance data of Examples 1, 2, and 3 are summarized in the following table (showing the performance test results of anti-sticking layer coils of different colors):
[0069]
[0070]
[0071] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.
Claims
1. A colored waterproof membrane that can be bonded to post-cast concrete, characterized in that: include: An anti-adhesive layer, an anti-adhesive self-adhesive layer, and a polymer sheet layer are sequentially arranged from top to bottom, wherein the front overlapping area of the polymer sheet layer is provided with an overlapping edge self-adhesive, the outer surface color of the overlapping edge self-adhesive is different from the color of the anti-adhesive layer, the reflectivity of the anti-adhesive layer is less than 50%, the surface color difference of the anti-adhesive layer is ΔE*ab≤2, and the color difference between the outer surface of the anti-adhesive layer and the overlapping edge self-adhesive is ΔE*ab≥5; When adjacent waterproof membranes are overlapped, if the overlap width is not less than the width of the front overlap region, there is no color difference at the overlap of the waterproof membranes; if the overlap width is less than the width of the front overlap region, there is a color difference at the overlap of the waterproof membranes; The outer surface of the overlapping edge self-adhesive is covered with a first isolation film.
2. The colored waterproof membrane that can be bonded to post-cast concrete according to claim 1, characterized in that: The thickness deviation of the anti-sticking layer is no more than 5 μm.
3. The colored waterproof membrane that can be bonded to post-cast concrete according to claim 1, characterized in that: The anti-sticking layer comprises a weather-resistant pigment, which is an organic pigment or an inorganic pigment.
4. The colored waterproof membrane that can be bonded to post-cast concrete according to claim 1, characterized in that: The thickness of the anti-sticking layer is 0.5-500 μm, and the thickness of the polymer sheet layer is 0.05-2.0 mm.
5. The colored waterproof membrane that can be bonded to post-cast concrete according to claim 1, characterized in that: A second isolation film is provided on the back of the polymer sheet layer, and a back-coated self-adhesive adhesive is provided between the second isolation film and the polymer sheet layer.
6. The colored waterproof membrane that can be bonded to post-cast concrete according to claim 5, characterized in that: The area of the back-coated self-adhesive is smaller than or equal to the area of the polymer sheet layer.