Thermoplastic polyolefin waterproofing membrane

Abstract

The application discloses a thermoplastic polyolefin waterproof roll material, which comprises a polyolefin inner layer and a protective film for external protection, and the inner surface of the polyolefin inner layer is further provided with a contact layer in contact with a tunnel waterproof buffer layer, the contact layer comprises vertically distributed convex regions, the outer surface of the convex regions is used for adhering to the tunnel buffer layer and spacing, and the recessed regions are formed between the convex regions and are alternately distributed on the outer surface of the contact layer and between the convex regions. The thermoplastic polyolefin waterproof roll material, by improving the hierarchical mechanism, using the preformed contact layer structure on the inner side, can not only improve the structural strength to a certain extent, but also provide the concave-convex structure to form the heat insulation and the protective space, effectively improve the practicability in the tunnel waterproof engineering, and has the performance improvement of stable reinforcement connection with the gasket and the buffer layer, ensures the waterproof effect and improves the construction convenience.

Description

Technical Field

[0001] This invention relates to the field of polyolefin technology, and is applicable to waterproof polyolefin multilayer rolls, specifically a thermoplastic polyolefin waterproof roll. Background Technology

[0002] Polyolefin materials possess excellent ductility and plasticity, and are commonly used in membrane materials, particularly in waterproofing projects such as waterproofing the base layer of tunnels. For example, a polyolefin waterproof membrane with publication number CN203077752U comprises an upper polyolefin layer, a lower polyolefin layer, and a polyester fiber mesh between the two polyolefin layers. The upper and lower polyolefin layers are inserted into the mesh openings of the polyester fiber mesh and bonded together, forming a unified structure. The polyester fiber mesh is a grid formed by the interlacing of polyester fiber threads. A non-woven fabric layer is adhered to the lower surface of the lower polyolefin layer, and the upper surface of the upper polyolefin layer has raised textures corresponding to the weave of the polyester fiber mesh. This application offers advantages such as high strength, good stability, strong puncture resistance, convenient construction, and excellent waterproofing effect.

[0003] For example, a novel thermoplastic polyolefin waterproof membrane, with publication number CN206663916U, includes a waterproof membrane body. Its key feature is that the waterproof membrane body has a layered structure, comprising a polymer nanolayer, an anti-aging layer, a reinforcing layer, an adhesive layer, and a separating layer. The outer layer on one side of the waterproof membrane body is the polymer nanolayer, and the outer layer on the other side is the separating layer. Adjacent to the polymer nanolayer is the anti-aging layer, which is a thermoplastic polyolefin layer. Adjacent to the separating layer is the adhesive layer. A reinforcing layer is located between the thermoplastic polyolefin layer and the adhesive layer. This reinforcing layer has a layered structure, consisting of a non-woven fabric layer and a metal braided layer. The thermoplastic polyolefin waterproof membrane exhibits good tensile strength and flexibility. Embedding the reinforcing layer into the adhesive layer prevents the layers from detaching, thus improving product quality.

[0004] The aforementioned existing technologies can basically represent the mainstream improvement direction of similar existing technologies for polyolefin waterproof membranes in the market, and have achieved very practical progress. However, when used as waterproof membranes, especially waterproof membranes used in tunnels, they have obvious shortcomings in terms of insufficient heat insulation and protection performance, so further improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to provide a thermoplastic polyolefin waterproof membrane to solve the problem mentioned in the background art that when polyolefin materials are used as waterproof membranes, especially waterproof membranes used in tunnels, there are obvious shortcomings in their heat insulation and protection performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a thermoplastic polyolefin waterproof membrane, comprising a polyolefin inner layer and a protective film for external protection, wherein the inner surface of the polyolefin inner layer is also provided with a contact layer that contacts the tunnel waterproof buffer layer, the contact layer comprising vertically distributed protruding areas, wherein the outer surface of the protruding areas is used to adhere to the tunnel buffer layer and separate the space, wherein recessed areas are formed between the protruding areas and located on the outer surface of the contact layer and alternately distributed between the protruding areas.

[0007] Preferably, the raised area is used to separate the polyolefin inner layer from the tunnel waterproof buffer layer and improve the puncture resistance.

[0008] Preferably, the recessed area corresponds to the inner surface of the contact layer and is tightly attached to the inner layer of the polyolefin, while the recessed area is used to guide the flow of seepage water or water vapor condensation.

[0009] Preferably, the inner surface of the raised area forms a receiving area with the inner layer of polyolefin, wherein the receiving area can be filled with gas or colloid to improve the heat insulation effect.

[0010] Preferably, a reinforcing member is installed on the outer surface of the recessed area, wherein the reinforcing member may be a first metal wire or a second metal wire.

[0011] Preferably, the first metal wire is vertically distributed, that is, distributed along the distribution direction of the recessed area 6, and the end of the first metal wire is not sharp.

[0012] Preferably, the first metal wire is a single-pass shape memory alloy material or a double-pass shape memory alloy material, wherein the middle section of the first metal wire is connected to the contact layer, while the first and last sections are initially attached to the surface of the contact layer.

[0013] Preferably, the second metal wire is horizontally distributed, and the contact layer is divided into inner and outer layers. The outer layer has a layer structure with recessed and protruding shapes, and the inner layer is used to directly bond with the polyolefin inner layer. The middle section of the second metal wire is fixed to the surface of the inner layer, while both ends extend into the receiving area.

[0014] Preferably, the receiving area is arranged in vertical segments, wherein the receiving area can be pre-filled with adhesive.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This thermoplastic polyolefin waterproof membrane, by improving its layer structure and utilizing the pre-formed contact layer structure on the inner side, can not only improve the structural strength to a certain extent, but also provide a concave-convex structure to form a heat insulation and protective space, effectively improving its practicality in tunnel waterproofing projects. It also has the performance improvement of stable and reinforced connection with gaskets and buffer layers, ensuring waterproofing effect while improving construction convenience, as specifically shown below.

[0016] 1. By designing a contact layer on the inner surface of the roll material, the contact layer is pre-formed and then bonded to the roll material, reducing the processing difficulty. The raised and recessed areas in the contact layer provide multiple layers of protection, preventing the tunnel rock base layer that has passed through the buffer layer from further puncturing the roll material, thus ensuring the waterproof effect. At the same time, multiple sets of spaces are used to achieve an auxiliary heat insulation effect.

[0017] 2. The use of the first metal wire can, on the one hand, increase the overall anti-slip and tensile strength of the roll material, and on the other hand, utilize its own temperature-sensitive deformation characteristics to achieve automatic deformation during the heating and bonding of the gasket, thereby creating a positioning effect between the gasket and the gasket, thus improving the overall laying efficiency of the waterproof roll material.

[0018] 3. As a replacement or compatible solution for the first metal wire, the structure of the second metal wire can not only simultaneously achieve the functions of reinforcing the first metal wire and strengthening the positioning connection through deformation, but also utilize its unique distribution pattern and, in conjunction with the adhesive in the containment area, generate a reinforcing connection effect with the buffer layer or gasket after being heated in a designated area of ​​the roll material. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the exploded structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the distribution structure of the receiving area in this invention;

[0022] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection structure between the first metal wire and the gasket of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure in which the metal wire is connected to the buffer layer according to the present invention;

[0025] Figure 7 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the second metal wire after deformation according to the present invention.

[0027] In the diagram: 1. Polyolefin inner layer; 2. Protective film; 3. Contact layer; 4. Raised area; 5. Receiving area; 6. Recessed area; 7. First metal wire; 8. Second metal wire; 9. Gasket; 10. Buffer layer. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-8 The present invention provides the following technical solution:

[0030] Example 1: The solution disclosed in this example is intended to address the problems existing in the prior art, and the specific solution is as follows: Figures 1-3 As shown, the structure includes a polyolefin inner layer 1 and a protective film 2 for external protection. The inner surface of the polyolefin inner layer 1 also has a contact layer 3 that contacts the tunnel waterproof buffer layer 10. The contact layer 3 contains vertically distributed raised areas 4. The outer surface of the raised areas 4 is used to adhere to the tunnel buffer layer and separate the space. Between the raised areas 4, recessed areas 6 are formed, alternating between the raised areas 4 and located on the outer surface of the contact layer 3. The raised areas 4 separate the polyolefin inner layer 1 from the tunnel waterproof buffer layer and improve puncture resistance. The recessed areas 6... The inner surface of the contact layer 3 should be tightly bonded to the inner polyolefin layer 1, while the recessed area 6 is used to guide seepage or condensation. Due to the presence of the raised area 4, after the roll material is laid on the surface of the buffer layer, it will be separated from the buffer layer itself by a certain space. In this way, even if the rock layer penetrates the buffer layer, the damage to the roll material itself will be minimized. At the same time, because a certain space is separated, the recessed area 6 can not only guide seepage or condensation, but also provide a certain heat insulation effect by separating a certain space.

[0031] The inner surface of the raised area 4 and the inner polyolefin layer 1 form a receiving area 5, in which gas or colloid can be filled to improve the heat insulation effect. In this solution, a heat insulation zone is formed between the contact layer 3 and the inner polyolefin layer 1. This heat insulation zone is the receiving area 5. Since it is formed by the relative depression of the raised area 4 of the contact layer 3, it can achieve a relatively better heat insulation effect when combined with the space between the depression area 6 and the buffer layer.

[0032] Example 2: In order to increase the overall structural strength of the roll material, metal wires are also provided on the outer surface of the recessed area 6 of the contact layer 3. The use of metal wires is to improve the overall tensile and scratch resistance of the roll material. The reason for adopting two schemes is to meet the requirements under different usage conditions. The outer surface of the recessed area 6 is equipped with a reinforcing member, which can be a first metal wire 7 or a second metal wire 8. The first metal wire 7 and the second metal wire 8 can exist simultaneously or independently, and their distribution can be horizontal, vertical or inclined.

[0033] The solution disclosed in this embodiment increases the connection stability between the roll material, gasket, and buffer layer by using a specific first metal wire 7, based on the metal wire. During the laying of the waterproof roll material, not only must the overlapping edges of adjacent roll materials be sealed, but a stable connection between the inner surface of the roll material and the gasket must also be achieved through heat fusion. Conventional methods require simple support and positioning of the roll material after heat fusion for a period of time, and waiting for the heat-fused area to cool down, in order to ensure the connection stability between the roll material and the gasket. However, in this solution, as shown in the figure... Figures 4-6 As shown, the first metal wire 7 is vertically distributed, that is, distributed along the distribution direction of the recessed area 6, and the end of the first metal wire 7 is not sharp. The first metal wire 7 is a single-pass shape memory alloy material or a double-pass shape memory alloy material. The middle section of the first metal wire 7 is connected to the contact layer 3, while the first and last sections are initially attached to the surface of the contact layer 3. During the laying process, the gasket can be heated to melt and bond with the roll material. During this process, the two ends of the first metal wire 7 will bend and deform, and the bent part can be attached to the outer edge of the gasket 9. Since the two ends are deformed, the other end will fit into the groove structure of the gasket. At the same time, the roll material in other areas can be heated so that the two ends of the first metal wire 7 can be deformed and inserted into the buffer layer 10, thereby making the connection of the roll material more stable.

[0034] Example 3: In this example, the second metal wire 8 is horizontally distributed, and the contact layer 3 is divided into inner and outer layers. The outer layer has a layer structure with concave and convex shapes, and the inner layer is used to directly bond with the polyolefin inner layer 1. The middle section of the second metal wire 8 is fixed to the surface of the inner layer, while both ends extend into the receiving area 5. The receiving area 5 is vertically segmented, and the receiving area 5 can be pre-filled with adhesive. The second metal wire 8 can not only achieve the function of the first metal wire 7, but also destroy the contact layer 3 through the force generated after deformation. Therefore, the adhesive in the corresponding receiving area 5 will be squeezed out by the subsequent extrusion pressure, which can achieve a better reinforcement connection with the gasket 9 and the buffer layer 10. However, the corresponding heat insulation effect will decrease. Therefore, different solutions need to be selected according to the specific tunnel waterproofing environment requirements.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermoplastic polyolefin waterproof membrane, comprising a polyolefin inner layer (1) and a protective film (2) for external protection, wherein the inner surface of the polyolefin inner layer (1) is further provided with a contact layer (3) that contacts a tunnel waterproof buffer layer (10), characterized in that: The contact layer (3) contains vertically distributed protrusions (4), wherein the outer surface of the protrusions (4) is used to fit the tunnel buffer layer and separate the space, and between the protrusions (4) are recessed areas (6) located on the outer surface of the contact layer (3) and distributed alternately between the protrusions (4). The inner surface of the protruding area (4) forms a receiving area (5) with the polyolefin inner layer (1), wherein the receiving area (5) is filled with colloid to improve the heat insulation effect; The outer surface of the recessed area (6) is fitted with a reinforcing member, wherein the reinforcing member is a first metal wire (7) or a second metal wire (8). The first metal wire (7) is vertically distributed, that is, distributed along the distribution direction of the recessed area (6), and the end of the first metal wire (7) is not sharp; The first metal wire (7) is a single-pass memory alloy material or a double-pass memory alloy material, wherein the middle section of the first metal wire (7) is connected to the contact layer (3), while the first and last sections are initially attached to the surface of the contact layer (3). The second metal wire (8) is horizontally distributed, while the contact layer (3) is divided into inner and outer double layers. The outer layer is a layer structure with concave and convex shapes, and the inner layer is used to directly bond with the polyolefin inner layer (1). The middle section of the second metal wire (8) is fixed on the surface of the inner layer, while both ends extend into the receiving area (5).

2. The thermoplastic polyolefin waterproof membrane according to claim 1, characterized in that: The raised area (4) is used to separate the polyolefin inner layer (1) from the tunnel waterproof buffer layer and improve the puncture resistance.

3. The thermoplastic polyolefin waterproof membrane according to claim 2, characterized in that: The recessed area (6) is closely attached to the inner surface of the contact layer (3) in the polyolefin inner layer (1), and the recessed area (6) is used to guide the seepage of water or water vapor condensation.

4. The thermoplastic polyolefin waterproof membrane according to claim 1, characterized in that: The receiving area (5) is vertically segmented, and the receiving area (5) is pre-filled with adhesive.

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