A pre-laid self-healing waterproof membrane with polyester lining

Abstract

This invention provides a pre-laid self-healing waterproof membrane with a polyester base. The self-healing waterproof membrane includes a layered bitumen-based waterproof layer and a penetrating crystalline waterproof bonding sand layer. The bitumen-based waterproof layer is connected to the penetrating crystalline waterproof bonding sand layer via a self-adhesive layer. The pre-laid self-healing waterproof membrane with a polyester base provided by this invention has a simple and reasonable structural design. After contacting the concrete, the penetrating crystalline waterproof bonding sand layer penetrates into the concrete to form a crystalline layer. This allows for self-repair of minor defects in the concrete while simultaneously forming a rigid waterproof layer. Combined with the bitumen-based waterproof layer, it forms a "rigid + flexible self-healing waterproof structure," thus creating a waterproof system with two waterproof layers in a single application. This effectively saves construction time and significantly improves waterproofing performance, making it suitable for widespread use in the construction industry.

Description

Technical Field

[0001] This utility model belongs to the field of waterproofing technology, and relates to a waterproof membrane, particularly a pre-laid self-healing waterproof membrane with polyester base. Background Technology

[0002] Waterproof membrane refers to a waterproof material product made by impregnating a base material with asphalt or polymer-based waterproofing materials. It is supplied in roll form and is called waterproof membrane. It is mainly used in building walls, roofs, tunnels, highways, landfills, etc., to resist external rainwater and groundwater seepage. It is a flexible building material that can be rolled up and serves as a leak-proof connection between the foundation and the building. It is the first line of defense for waterproofing the entire project and plays a vital role in the overall project.

[0003] CN 208277563U discloses a pre-laid reverse-adhesive waterproof membrane and a building waterproofing structure, comprising a cement mortar fiber cloth layer, an upper self-adhesive layer, a substrate, and a lower self-adhesive layer. The upper self-adhesive layer adheres to the upper surface of the substrate, the lower self-adhesive layer adheres to the lower surface of the substrate, and the cement mortar fiber cloth layer adheres to the side of the upper self-adhesive layer facing away from the substrate. The cement mortar fiber cloth layer improves the peel strength between the pre-laid reverse-adhesive waterproof membrane and the cement mortar, thereby enhancing the waterproofing effect.

[0004] CN 203527998U discloses a pre-laid waterproof membrane with a sanded surface. The pre-laid waterproof membrane includes an adhesive layer, and at least one side of the adhesive layer has a sanded surface layer. By providing a sanded surface layer on the surface of the adhesive layer of the waterproof membrane, cement powder is not needed to prevent the adhesive from sticking when the waterproof membrane is installed using the pre-laid reverse bonding method. Simultaneously, the sanded surface layer on the adhesive layer prevents the adhesive layer and the waterproof membrane from aging due to natural factors such as sunlight and temperature, ensuring the normal use of the waterproof membrane.

[0005] While the aforementioned pre-laid waterproof membranes have improved the waterproofing effect of the membranes, they do not consider the actual construction conditions. Due to the high hardness of the granules used in the granular layer, the carrier layer is easily damaged under pressure during transportation and construction, thus affecting the waterproofing effect. Furthermore, the whiteness value of the granular layer in existing technologies is too high, generally above 70%, which can easily cause glare for operators and hinder construction efficiency. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a pre-laid self-healing waterproof membrane based on polyester. This invention uses an asphalt-based reinforced waterproof layer as the main waterproof layer, and sets a penetrating crystalline waterproof bonding sand layer on the upper surface of the asphalt-based reinforced waterproof layer. The waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer penetrates into the concrete to form a crystalline layer, achieving self-repair of minor defects in the concrete while forming a rigid waterproof layer. The pre-laid self-healing waterproof membrane has a reasonable structural design, forming a "rigid + flexible self-healing waterproof structure," creating a waterproof system with two waterproof layers in a single application. This effectively saves construction time and significantly improves waterproofing performance, making it suitable for widespread use in the construction industry.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] This utility model provides a polyester-based pre-laid self-healing waterproof membrane, which includes a layered bitumen-based waterproof membrane and a penetrating crystalline waterproof bonding sand layer.

[0009] The self-healing waterproof membrane provided by this utility model features an asphalt-based reinforced waterproof layer that is tightly bonded to a penetrating crystalline waterproof bonding sand layer, forming a continuous waterproof layer. The asphalt-based reinforced waterproof layer exhibits excellent waterproofing performance, forming a flexible waterproof layer. The activating components in the penetrating crystalline waterproof bonding sand layer can diffuse upon contact with cast-in-place concrete, penetrating the concrete structure and forming a crystalline layer, autonomously repairing minor structural defects and forming a rigid waterproof layer. Combined with the asphalt-based reinforced waterproof layer, this forms a "rigid + flexible self-healing waterproof structure," creating a waterproof system with two waterproof layers applied in a single application, further enhancing the waterproofing effect of the self-healing waterproof membrane.

[0010] Preferably, the particle size of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer is 0.18 to 2.8 mm, for example, it can be 0.18 mm, 0.2 mm, 0.22 mm, 0.24 mm, 0.26 mm or 0.28 mm, etc., but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0011] Preferably, the thickness of the penetrating crystalline waterproof adhesive sand layer is 0.2 to 2 mm, for example, it can be 0.2 mm, 0.4 mm, 0.8 mm, 1.2 mm, 1.6 mm or 2 mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0012] Preferably, the particle coating amount of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer is 1-2 kg / m³. 2 For example, it could be 1kg / m 21.2kg / m 2 1.4kg / m 2 1.6kg / m 2 1.8kg / m 2 Or 2kg / m 2 This applies to, but is not limited to, the listed values; other unlisted values ​​within the range are also applicable.

[0013] To further improve the construction effect of the waterproof membrane, the Mohs hardness of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer is 2 to 3.

[0014] It is worth noting that the thickness of the penetrating crystalline waterproof bonding sand layer described in this utility model is 0.2–2 mm, and the particle coating amount of the waterproof bonding sand is 1–2 kg / m³. 2 By reasonably optimizing the coating thickness and particle coating amount, it is possible to ensure that there are sufficient activating components in the waterproof bonding sand layer to diffuse into the concrete and self-repair the small defects in the concrete, forming a suitable rigid waterproof layer structure. At the same time, it can also ensure that the preparation cost of the waterproof membrane is low, the unit weight is light, and it is easy to transport.

[0015] Preferably, the asphalt-based waterproof layer includes a self-adhesive layer, a base layer, an adhesive layer, and a release layer stacked together.

[0016] Preferably, the asphalt-based waterproof layer is connected to the penetrating crystalline waterproof adhesive sand layer through a self-adhesive layer.

[0017] Preferably, the thickness of the asphalt-based waterproof layer is ≥4mm, for example, it can be 4mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm or 5mm, etc., but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0018] Preferably, the self-adhesive layer comprises an asphalt-based adhesive layer.

[0019] Preferably, the thickness of the self-adhesive layer is 1.0 to 2.0 mm, for example, it can be 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 2.0 mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0020] In this invention, the asphalt-based adhesive layer has excellent impact resistance and adhesion, enabling a firm bond between the asphalt-based waterproof layer and the penetrating crystalline waterproof bonding sand layer. Furthermore, this invention does not specifically limit the composition of the self-adhesive layer, including the asphalt-based adhesive layer; any existing self-adhesive layer in the art, including asphalt-based adhesive, can be used.

[0021] Preferably, the thickness of the adhesive layer is 1.0 to 2.0 mm, for example, it can be 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 2.0 mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0022] Preferably, the adhesive layer comprises an asphalt-based adhesive layer or an asphalt layer.

[0023] Preferably, the isolation layer comprises a PE film or a PET film.

[0024] It is worth noting that the PE film described in this utility model includes a PE release film or a regular PE film; in addition, the surface of the release layer does not contain silicone oil.

[0025] Preferably, the base layer comprises a polyester base layer.

[0026] Preferably, the thickness of the base layer is 1.2 to 1.5 mm, for example, it can be 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm, but is not limited to the listed values. Other unlisted values ​​within the range are also applicable.

[0027] In this invention, the base layer serves as the skeleton layer of the asphalt-based waterproof layer and can be used to control the tensile strength and dimensional stability of the waterproof layer; the adhesive layer has good weather resistance, water resistance, corrosion resistance and low-temperature flexibility, and can maintain good waterproof performance under different environmental conditions, effectively reducing the penetration of rainwater, groundwater and other substances.

[0028] The numerical range described in this utility model includes not only the point values ​​listed above, but also any point values ​​within the numerical range not listed above. Due to space limitations and for the sake of brevity, this utility model will not exhaustively list the specific point values ​​included in the range.

[0029] The system refers to an equipment system, device system, or production device.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The pre-laid self-healing waterproof membrane with polyester-based material provided by this utility model has a simple and reasonable structural design. The asphalt-based waterproof layer is a flexible waterproof layer. After the penetrating crystalline waterproof bonding sand layer comes into contact with the concrete, it penetrates into the concrete to form a crystalline layer. While realizing the self-repair of small defects in the concrete, it also forms a rigid waterproof layer. The combination of the two forms a continuous waterproof layer with one rigid and one flexible layer, thus forming a waterproof system with two waterproof layers in one construction. This can effectively save construction time and significantly improve the waterproof effect, making it suitable for widespread use in the construction field. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of the pre-laid self-healing waterproof membrane with polyester lining provided in a specific embodiment of this utility model;

[0033] Among them, 1 is a penetrating crystalline waterproof bonding sand layer, 2 is an asphalt-based reinforced waterproof layer, 2-1 is a self-adhesive layer, 2-2 is a base layer, 2-3 is an adhesive layer, and 2-4 is an isolation layer. Detailed Implementation

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be determined by the claims.

[0036] It should be understood that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In one specific embodiment, this utility model provides a pre-laid self-healing waterproof membrane with a polyester base, such as... Figure 1 As shown, the polyester-based pre-laid self-healing waterproof membrane includes a layered bitumen-based waterproof membrane 2 and a penetrating crystalline waterproof bonding sand layer 1.

[0039] The particle size of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer 1 is 0.18–2.8 mm; the thickness of the penetrating crystalline waterproof bonding sand layer 1 is 0.2–2 mm.

[0040] The asphalt-based waterproof layer 2 includes a self-adhesive layer 2-1, a base layer 2-2, an adhesive layer 2-3, and a release layer 2-4, which are stacked together.

[0041] The asphalt-based waterproof layer 2 is connected to the penetrating crystalline waterproof bonding sand layer 1 through the self-adhesive layer 2-1;

[0042] The thickness of the asphalt-based waterproof layer 2 is ≥4mm;

[0043] The self-adhesive layer 2-1 includes an asphalt-based adhesive layer with a thickness of 1.0 to 2.0 mm;

[0044] The adhesive layer 2-3 comprises an asphalt-based rubber layer or asphalt, with a thickness of 1.0-2.0 mm;

[0045] The isolation layers 2-4 include PE film or PET film;

[0046] The base layer 2-2 includes a polyester base layer with a thickness of 1.2 to 1.5 mm.

[0047] Example 1

[0048] This embodiment provides a pre-laid self-healing waterproof membrane based on polyester, such as... Figure 1 As shown, the polyester-based pre-laid self-healing waterproof membrane includes a layered bitumen-based waterproof membrane 2 and a penetrating crystalline waterproof bonding sand layer 1.

[0049] The particle size of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer 1 is 1.0 to 2.0 mm;

[0050] The thickness of the penetrating crystalline waterproof bonding sand layer 1 is 1.5 mm;

[0051] The asphalt-based waterproof layer 2 includes a self-adhesive layer 2-1, a base layer 2-2, an adhesive layer 2-3, and a release layer 2-4, which are stacked together.

[0052] The asphalt-based waterproof layer 2 is connected to the penetrating crystalline waterproof bonding sand layer 1 through the self-adhesive layer 2-1;

[0053] The thickness of the asphalt-based waterproof layer 2 is >4mm;

[0054] The self-adhesive layer 2-1 includes an asphalt-based adhesive layer with a thickness of 1.5 mm;

[0055] The adhesive layer 2-3 comprises an asphalt-based rubber layer or asphalt, with a thickness of 1.5 mm;

[0056] The isolation layers 2-4 include PE film or PET film;

[0057] The base layer 2-2 includes a polyester base layer with a thickness of 1.2 mm.

[0058] Example 2

[0059] Polyester-based pre-laid self-healing waterproof membranes, such as Figure 1 As shown, the polyester-based pre-laid self-healing waterproof membrane includes a layered bitumen-based waterproof membrane 2 and a penetrating crystalline waterproof bonding sand layer 1.

[0060] The particle size of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer 1 is 1.0 to 2.0 mm;

[0061] The thickness of the penetrating crystalline waterproof bonding sand layer 1 is 1.5 mm;

[0062] The asphalt-based waterproof layer 2 includes a self-adhesive layer 2-1, a base layer 2-2, an adhesive layer 2-3, and a release layer 2-4, which are stacked together.

[0063] The asphalt-based waterproof layer 2 is connected to the penetrating crystalline waterproof bonding sand layer 1 through the self-adhesive layer 2-1;

[0064] The thickness of the asphalt-based waterproof layer 2 is >4mm;

[0065] The self-adhesive layer 2-1 includes an asphalt-based adhesive layer with a thickness of 1.0 mm;

[0066] The adhesive layer 2-3 comprises an asphalt-based rubber layer or asphalt, with a thickness of 2.0 mm;

[0067] The isolation layers 2-4 include PE film or PET film;

[0068] The base layer 2-2 comprises a polyester base layer with a thickness of 1.5 mm.

[0069] Example 3

[0070] Polyester-based pre-laid self-healing waterproof membranes, such as Figure 1 As shown, the polyester-based pre-laid self-healing waterproof membrane includes a layered bitumen-based waterproof membrane 2 and a penetrating crystalline waterproof bonding sand layer 1.

[0071] The particle size of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer 1 is 1.2 to 2.8 mm;

[0072] The thickness of the penetrating crystalline waterproof bonding sand layer 1 is 2mm;

[0073] The asphalt-based waterproof layer 2 includes a self-adhesive layer 2-1, a base layer 2-2, an adhesive layer 2-3, and a release layer 2-4, which are stacked together.

[0074] The asphalt-based waterproof layer 2 is connected to the penetrating crystalline waterproof bonding sand layer 1 through the self-adhesive layer 2-1;

[0075] The thickness of the asphalt-based waterproof layer 2 is >4mm;

[0076] The self-adhesive layer 2-1 includes an asphalt-based adhesive layer with a thickness of 2.0 mm;

[0077] The adhesive layer 2-3 comprises an asphalt-based rubber layer or asphalt, with a thickness of 1.0 mm;

[0078] The isolation layers 2-4 include PE film or PET film;

[0079] The base layer 2-2 comprises a polyester base layer with a thickness of 1.3 mm.

[0080] Tensile properties, water resistance, and low-temperature flexibility were tested on the pre-laid self-healing waterproof membrane with polyester lining provided in the above embodiments.

[0081] Five 250mm × 300mm (longitudinal × transverse) self-healing waterproof membrane samples were cut in both the longitudinal and transverse directions, and tensile properties were tested according to 6.8.2 of GB / T 23457-2017. The results showed that the self-healing waterproof membranes in Examples 1 to 3 did not exhibit separation between the adhesive layer and the core material during tensile testing, and the tensile strength could reach over 1000N / 50mm.

[0082] Three 100mm × 70mm (longitudinal × transverse) self-healing waterproof membrane sheets were cut and subjected to water resistance testing according to section 6 of T / CWA302-2023. The results showed that the self-healing waterproof membrane sheets in Examples 1-3 exhibited no cracks, delamination, blistering, or breakage, and had a water absorption rate of ≤4%.

[0083] Five 150mm × 25mm (longitudinal × transverse) self-healing waterproof membrane samples were cut and tested for low-temperature flexibility according to GB / T328.14-2007. The bending axis diameter was 20mm during the test. The results showed that the self-healing waterproof membranes in Examples 1-3 did not exhibit cracking or other phenomena at -20℃.

[0084] Example 4

[0085] This embodiment provides a pre-laid self-healing waterproof membrane with polyester backing. The only difference between this pre-laid self-healing waterproof membrane and that of Embodiment 1 is:

[0086] In this embodiment, the particle size range of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer is adjusted to 0.15-0.18 mm.

[0087] In this embodiment, because the particle size of the sand in the penetrating crystalline waterproof bonding sand layer is relatively small, the sand is not firmly bonded to the self-adhesive layer and is very easy to fall off. As a result, there are fewer activating components that diffuse into the concrete structure, resulting in a thinner rigid waterproof layer and a reduction in the waterproof performance of the polyester-based pre-laid self-healing waterproof membrane.

[0088] Example 5

[0089] This embodiment provides a pre-laid self-healing waterproof membrane with polyester backing. The only difference between this pre-laid self-healing waterproof membrane and that of Embodiment 1 is:

[0090] In this embodiment, the thickness of the penetrating crystalline waterproof adhesive sand layer is adjusted to 0.35mm.

[0091] In this embodiment, the thickness of the penetrating crystalline waterproof adhesive sand layer is too large, which increases the unit mass of the waterproof membrane, thereby affecting subsequent transportation and increasing costs.

[0092] Comparative Example 1

[0093] This comparative example provides a pre-laid self-healing waterproof membrane with a polyester base. The only difference between this pre-laid self-healing waterproof membrane and Example 1 is that:

[0094] This comparative example omits the setting of the penetrating crystalline waterproof adhesive sand layer.

[0095] The inclusion of a penetrating crystalline waterproof bonding sand layer in this comparative example results in the asphalt-based reinforced waterproof layer being in direct contact with the concrete, preventing the formation of a rigid waterproof layer and thus significantly reducing the waterproof performance of the waterproof membrane.

[0096] Comparative Example 2

[0097] This comparative example provides a pre-laid self-healing waterproof membrane with a polyester base. The only difference between this pre-laid self-healing waterproof membrane and Example 1 is that:

[0098] In this comparative example, a protective layer is provided on the upper surface of the penetrating crystalline waterproof adhesive sand layer, and the protective layer is a polyurethane coating layer.

[0099] The addition of a protective layer in this comparative example prevents the active components in the penetrating crystalline waterproof bonding sand layer from directly contacting the concrete, thus preventing the formation of a rigid waterproof layer and reducing the waterproofing effect of the waterproof membrane.

[0100] In summary, the pre-laid self-healing waterproof membrane with polyester backing provided by this utility model has a simple and reasonable structural design. After the penetrating crystalline waterproof bonding sand layer comes into contact with the concrete, it penetrates into the concrete to form a crystalline layer. While realizing the self-repair of minor defects in the concrete, it also forms a rigid waterproof layer. Combined with the asphalt-based reinforced waterproof layer, it forms a "rigid + flexible self-healing waterproof structure", forming a waterproof system with two layers of waterproofing in one construction. This can effectively save construction time and significantly improve the waterproofing effect, making it suitable for widespread use in the construction field.

[0101] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A polyester mat-based pre-ply type self-repairing waterproofing membrane, characterized in that, The pre-laid self-healing waterproof membrane with polyester backing includes a layered bitumen-based waterproof layer and a penetrating crystalline waterproof bonding sand layer.

2. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 1, characterized in that, The particle size of the multifunctional penetrating crystalline waterproof bonding sand in the penetrating crystalline waterproof bonding sand layer is 0.18 to 2.8 mm.

3. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 2, characterized in that, The thickness of the penetrating crystalline waterproof bonding sand layer is 0.2–2 mm.

4. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 1, characterized in that, The asphalt-based waterproof layer includes a self-adhesive layer, a base layer, an adhesive layer, and a release layer, which are stacked together.

5. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 4, characterized in that, The asphalt-based waterproof layer is connected to the penetrating crystalline waterproof adhesive sand layer through a self-adhesive layer.

6. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 4, characterized in that, The thickness of the asphalt-based waterproof layer is ≥4mm.

7. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 4, characterized in that, The self-adhesive layer includes an asphalt-based adhesive layer; The thickness of the self-adhesive layer is 1.0 to 2.0 mm.

8. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 4, characterized in that, The thickness of the adhesive layer is 1.0–2.0 mm; The adhesive layer includes an asphalt-based rubber layer or an asphalt layer.

9. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 4, characterized in that, The isolation layer includes a PE film or a PET film.

10. The polyester mat-based pre-ply type self-repairing waterproofing membrane according to claim 4, characterized in that, The tire base layer includes a polyester tire base layer; The thickness of the base layer is 1.2 to 1.5 mm.

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