A lap joint structure of a waterproofing membrane
By introducing protrusions, grooves, and adhesive layers into the overlapping structure of the waterproof membrane, the problem of insufficient construction deviation compensation in the hot melt rubber asphalt layer is solved, improving adhesion and overall performance, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 安徽隆润高分子材料有限公司
- Filing Date
- 2025-09-01
- Publication Date
- 2026-07-24
AI Technical Summary
In existing waterproof membrane overlap structures, although the hot-melt rubber asphalt layer improves the bonding strength, it lacks a compensation mechanism for construction deviations.
The connecting assembly includes a first connecting strip, a second connecting strip, a protrusion, a groove, and an adhesive layer. The adhesion is enhanced by the insertion of the protrusion and groove and the combination of the adhesive layer to compensate for construction deviations. The connecting assembly also includes a reinforcing layer, a rubber layer, a waterproof base layer, an isolation layer, and fiberglass cloth to improve overall performance.
It improves the overall integrity of waterproof membrane splicing and construction adaptability, enhances adhesion and resistance to ultraviolet rays and oxidation, and extends service life.
Smart Images

Figure CN224549373U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polymer materials, and in particular to an overlapping structure for waterproof membrane. Background Technology
[0002] Waterproof membranes are mainly used in building walls, roofs, tunnels, highways, landfills, etc., to resist external rainwater and groundwater seepage. They are flexible building materials that can be rolled up and serve as a leak-proof connection between the foundation and the building. They are the first line of defense for waterproofing the entire project and play a vital role in the overall project.
[0003] A waterproof membrane overlap structure is disclosed, relating to the field of membrane overlap technology. The structure includes: a first waterproof membrane and a second waterproof membrane, which overlap; and a hot-melt rubber asphalt waterproof coating layer disposed between the overlap portions of the first and second waterproof membranes. This structure connects the overlap portions of the first and second waterproof membranes using the hot-melt rubber asphalt waterproof coating layer as an adhesive. The hot-melt rubber asphalt waterproof coating layer has good film-forming properties, ensuring overlap quality and connection strength while also improving construction efficiency.
[0004] However, although the hot-melt rubber asphalt layer used in the above-mentioned utility model improves the bonding strength, it lacks a compensation mechanism for construction deviations. Utility Model Content
[0005] The purpose of this invention is to provide an overlapping structure for waterproof membranes, which aims to solve the problem that although the hot-melt rubber asphalt layer used in the prior art improves the bonding strength, it lacks a compensation mechanism for construction deviations.
[0006] To achieve the above objectives, this utility model provides an overlapping structure for a waterproof membrane, including a first membrane, a second membrane, and a connecting component. The connecting component further includes a first connecting strip, a second connecting strip, a protrusion, a groove, and an adhesive layer.
[0007] The first connecting strip is connected to the first roll material and located on one side of the first roll material; the protrusion is connected to the first connecting strip and located on one side of the first connecting strip; the adhesive layer is disposed at the bottom of the first connecting strip and on the outside of the protrusion; the groove is connected to the protrusion and located on the outside of the protrusion; the second connecting strip is connected to the groove and located on one side of the groove; and the second roll material is connected to the second connecting strip and located on one side of the second connecting strip.
[0008] The first roll and the second roll both include a reinforcing layer, a rubber layer and a waterproof base layer. The rubber layer is fixedly connected to the reinforcing layer and is located at the bottom of the reinforcing layer. The waterproof base layer is fixedly connected to the reinforcing layer and is located at the top of the reinforcing layer. The first connecting strip is disposed on the waterproof base layer of the first roll, and the second connecting strip is disposed on the reinforcing layer and the rubber layer of the second roll.
[0009] The connecting component further includes an isolation layer, which is connected to the waterproof base layer and located on top of the waterproof base layer.
[0010] The connecting component further includes a glass fiber cloth, which is connected to the rubber layer and located at the bottom of the rubber layer.
[0011] The connecting component further includes a waterproof adhesive coating, which is connected to the isolation layer and located on top of the isolation layer.
[0012] This utility model discloses an overlapping structure for a waterproof membrane. The first and second membranes are made of the same material. A first connecting strip is provided on one side of the first membrane, and a second connecting strip is provided on one side of the second membrane. The first connecting strip has an integrally formed protrusion, and the second connecting strip has an integrally formed groove. When the first and second membranes are spliced, the protrusion on the first connecting strip is inserted into the groove for splicing. An adhesive layer is provided between the protrusion and the groove to increase adhesion and improve the overall integrity after splicing. This solves the problem in the prior art where the hot-melt rubber asphalt layer, although improving bonding strength, lacks a compensation mechanism for construction deviations. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0014] Figure 1 This is a structural diagram of the overlapping structure of a waterproof membrane according to this utility model.
[0015] Figure 2 yes Figure 1 Enlarged view of detail A.
[0016] Figure 3 This is a partial cross-sectional schematic diagram of the overlapping structure of a waterproof membrane according to this utility model.
[0017] 101-First roll material, 102-Second roll material, 103-Connecting assembly, 104-First connecting strip, 105-Second connecting strip, 106-Protrusion, 107-Groove, 108-Adhesive layer, 109-Reinforcing layer, 110-Rubber layer, 111-Waterproof base layer, 112-Isolation layer, 113-Fiberglass cloth, 114-Waterproof adhesive coating. Detailed Implementation
[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0019] First Embodiment
[0020] Please see Figures 1-3 , Figure 1 This is a structural diagram of the overlapping structure of a waterproof membrane according to this utility model. Figure 2 yes Figure 1 Enlarged view of detail A Figure 3 This is a partial cross-sectional schematic diagram of the overlapping structure of a waterproof membrane according to this utility model.
[0021] This utility model provides an overlapping structure for a waterproof membrane: it includes a first membrane 101, a second membrane 102, and a connecting component 103. The connecting component 103 further includes a first connecting strip 104, a second connecting strip 105, a protrusion 106, a groove 107, an adhesive layer 108, a reinforcing layer 109, a rubber layer 110, a waterproof base layer 111, a separating layer 112, a fiberglass cloth 113, and a waterproof adhesive coating 114. This solution addresses the problem in existing technologies where the hot-melt rubber asphalt layer, while improving bonding strength, lacks a compensation mechanism for construction deviations.
[0022] In this embodiment, the first connecting strip 104 is connected to the first roll 101 and located on one side of the first roll 101; the protrusion 106 is connected to the first connecting strip 104 and located on one side of the first connecting strip 104; the adhesive layer 108 is disposed at the bottom of the first connecting strip 104 and on the outside of the protrusion 106; the groove 107 is connected to the protrusion 106 and located on the outside of the protrusion 106; the second connecting strip 105 is connected to the groove 107 and located on one side of the groove 107; the second roll 102 is connected to the second connecting strip 105 and located on one side of the second connecting strip 105; the first roll 101 and the second roll 102 are made of the same material. The water-resistant roofing membrane has a first connecting strip 104 on one side of the first roll 101 and a second connecting strip 105 on one side of the second roll 102. The first connecting strip 104 has an integrally formed protrusion 106, and the second connecting strip 105 has an integrally formed groove 107. When the first roll 101 and the second roll 102 are spliced, the protrusion 106 on the first connecting strip 104 is inserted into the groove 107 for splicing. An adhesive layer 108 is provided between the protrusion 106 and the groove 107 to increase adhesion and improve the overall integrity after splicing. This solves the problem that although the hot-melt rubber asphalt layer used in the prior art improves the bonding strength, it lacks a compensation mechanism for construction deviations.
[0023] The first roll 101 and the second roll 102 both include a reinforcing layer 109, a rubber layer 110, and a waterproof base layer 111. The rubber layer 110 is fixedly connected to the reinforcing layer 109 and is located at the bottom of the reinforcing layer 109. The waterproof base layer 111 is fixedly connected to the reinforcing layer 109 and is located at the top of the reinforcing layer 109. The first connecting strip 104 is disposed on the waterproof base layer 111 of the first roll 101, and the second connecting strip 105 is disposed on the reinforcing layer 109 and the rubber layer 110 of the second roll 102. The reinforcing layer 109 improves the toughness of the roll, the waterproof base layer 111 serves as an important waterproof layer of the roll, and the rubber layer 110 provides extensibility to the roll. The first connecting strip 104 is integrally formed with the waterproof base layer 111, and the second connecting strip 105 is integrally formed with the reinforcing layer 109 and the rubber layer 110.
[0024] Secondly, the connecting component 103 also includes an isolation layer 112, which is connected to the waterproof base layer 111 and located on top of the waterproof base layer 111. The isolation layer 112 increases the UV resistance and oxidation resistance of the roll material, thereby extending the service life of the roll material.
[0025] Furthermore, the connecting assembly 103 also includes a fiberglass cloth 113, which is connected to the rubber layer 110 and located at the bottom of the rubber layer 110. The fiberglass cloth 113 can not only increase the tensile strength of the roll material but also increase the friction at the bottom of the roll material, thereby improving the adhesion during installation.
[0026] Finally, the connecting assembly 103 also includes a waterproof adhesive coating 114, which is connected to the isolation layer 112 and located on top of the isolation layer 112. The waterproof adhesive coating 114 is applied to the top of the joint after the first roll 101 and the second roll 102 are spliced together, which increases waterproofness, prevents water from seeping through the joint, and extends service life.
[0027] In the overlapping structure of the waterproof membrane of this utility model, the first membrane 101 and the second membrane 102 are waterproof membranes of the same material. A first connecting strip 104 is provided on one side of the first membrane 101, and a second connecting strip 105 is provided on one side of the second membrane 102. The first connecting strip 104 has an integrally formed protrusion 106, and the second connecting strip 105 has an integrally formed groove 107. When the first membrane 101 and the second membrane 102 are spliced, the protrusion 106 on the first connecting strip 104 is inserted into the groove 107 for splicing. An adhesive layer 108 is provided between the protrusion 106 and the groove 107 to increase adhesion and improve the overall integrity after splicing. This solves the problem that although the hot melt rubber asphalt layer used in the prior art improves the bonding strength, it lacks a compensation mechanism for construction deviations.
[0028] The above-disclosed embodiments are merely preferred embodiments of the overlapping structure of waterproof membranes of this utility model, and should not be construed as limiting the scope of this utility model. Those skilled in the art can understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of this utility model still fall within the scope of this utility model.
Claims
1. An overlapping structure for a waterproof membrane, comprising a first roll and a second roll, characterized in that: It also includes a connecting component, which further includes a first connecting strip, a second connecting strip, a protrusion, a groove, and an adhesive layer; The first connecting strip is connected to the first roll material and located on one side of the first roll material; the protrusion is connected to the first connecting strip and located on one side of the first connecting strip; the adhesive layer is disposed at the bottom of the first connecting strip and on the outside of the protrusion; the groove is connected to the protrusion and located on the outside of the protrusion; the second connecting strip is connected to the groove and located on one side of the groove; and the second roll material is connected to the second connecting strip and located on one side of the second connecting strip.
2. The overlapping structure of a waterproof membrane as described in claim 1, characterized in that: Both the first roll and the second roll include a reinforcing layer, a rubber layer, and a waterproof base layer. The rubber layer is fixedly connected to the reinforcing layer and is located at the bottom of the reinforcing layer. The waterproof base layer is fixedly connected to the reinforcing layer and is located at the top of the reinforcing layer. The first connecting strip is disposed on the waterproof base layer of the first roll, and the second connecting strip is disposed on the reinforcing layer and the rubber layer of the second roll.
3. The overlapping structure of a waterproof membrane as described in claim 2, characterized in that: The connecting assembly also includes an isolation layer that is connected to the waterproof base layer and is located on top of the waterproof base layer.
4. The overlapping structure of a waterproof membrane as described in claim 3, characterized in that: The connecting assembly also includes a fiberglass cloth, which is connected to the rubber layer and located at the bottom of the rubber layer.
5. The overlapping structure of a waterproof membrane as described in claim 4, characterized in that: The connecting assembly also includes a waterproof adhesive coating that is connected to the isolation layer and located on top of the isolation layer.