A modified cement-based waterproofing membrane and a preparation system thereof
By designing an overlap edge pressing groove structure and a breathable isolation membrane on the cement-based waterproof membrane, the environmental pollution problem caused by the need for high-temperature heating in existing technologies has been solved, achieving safe and environmentally friendly membrane overlap and enhanced waterproof performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU GUSU NEW-TYPE BUILDING MATERIALS CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-21
AI Technical Summary
Existing cement-based waterproof membranes lack structural design for adjacent membrane edges, which requires high-temperature heating during construction, polluting the environment and posing safety risks.
The design incorporates a grooved structure at the overlap of the roll material, using interlocking cement slurry to achieve a pressing and fitting of the grooves. A breathable insulating membrane and a reinforcing body are used to prevent open flame heating.
It achieves safe and environmentally friendly roll overlap, enhances waterproof performance, and avoids environmental pollution and safety hazards caused by high-temperature heating.
Smart Images
Figure CN224528233U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building materials, and more specifically, to a modified cement-based waterproof membrane and its preparation system. Background Technology
[0002] Building waterproofing materials can be categorized into waterproof membranes, waterproof coatings, sealants, and rigid waterproofing materials. According to statistics from the China Building Waterproofing Association, the waterproofing construction area in 2023 was approximately 2.23 billion square meters. Of this, waterproof membranes accounted for about 65%-68%, waterproof coatings for about 25-27%, and other materials for about 2-5%. Waterproof coatings mainly include modified cement-based waterproof coatings and polyurethane waterproof coatings, accounting for 90% of the total coating volume. Modified cement-based waterproof coatings account for approximately 50% of the total coating volume, while polyurethane coatings account for approximately 40%.
[0003] Waterproof membranes are divided into two main categories: modified bitumen waterproof membranes and polymer waterproof membranes, accounting for approximately 65%-70%. Modified bitumen waterproof membranes are further divided into self-adhesive and non-self-adhesive types. Self-adhesive bitumen waterproof membranes are inherently adhesive at room temperature; after removing the surface release material (film), they can be directly adhered to the substrate. The membranes overlap and seal directly, without the need for open flame heating. Non-self-adhesive bitumen waterproof membranes, on the other hand, are installed by heating the surface of the membrane with 500-600℃ gas, melting the coating, and then bonding the overlapping edges of adjacent membranes to form a waterproof layer on the substrate. This method is called the hot-melt construction method. Because of the high-temperature combustion, it produces severe smoke and dust, causing serious environmental pollution.
[0004] Currently, there are no cement-based waterproof membranes, nor are there any structural designs for the adjacent edges of such waterproof membranes to address waterproofing issues. Utility Model Content
[0005] The main objective of this application is to provide a modified cement-based waterproof membrane and its preparation system, which creatively designs a grooved structure for the overlapping edges of the membrane. During construction, cement slurry is applied, and the grooves of the membrane are pressed and interlocked, forming a zipper-like interlock, ensuring reliable waterproofing.
[0006] To achieve the above objectives, in a first aspect, this application provides a modified cement-based waterproof membrane, comprising a waterproof membrane body, wherein the upper surface of one side of the waterproof membrane body has a first overlapping edge groove extending along its length direction, and the lower surface of the other side of the waterproof membrane body has a second overlapping edge groove extending along its length direction, wherein a first breathable isolation membrane, a first coating layer, a reinforcing matrix, a second coating layer, and a second breathable isolation membrane are sequentially arranged.
[0007] Optionally, the thickness of the waterproof membrane body is 1.5-2.5 mm.
[0008] Optionally, the reinforcing carcass is made of polyester felt or fiberglass mesh reinforced acrylic felt with a thickness of 0.2-0.3 mm.
[0009] Optionally, the first and second breathable isolation membranes are breathable polymer membranes coated with silicone oil on one side, including breathable polyethylene membranes or breathable polyvinylidene fluoride membranes, with a thickness of 1.0-1.5 mils.
[0010] Optionally, the first overlapping edge groove of the adjacent waterproof membrane body and the second overlapping edge groove cooperate with each other and are interlocked by cement slurry.
[0011] To achieve the above objectives, in a second aspect, this application provides a preparation system for a modified cement-based waterproof membrane, comprising a first winding frame for winding a reinforcing matrix, a powder coating preparation tank for storing dry powder coating, two liquid coating mixing tanks connected to the powder coating preparation tank via a conveying pipe, a pair of forming rollers, two second winding frames corresponding to the forming rollers for winding a breathable membrane, a heating chamber, a side groove pressure roller group disposed within the heating chamber, a curing zone, a cooling zone disposed outside the heating chamber, and a take-up frame.
[0012] Optionally, a hot air inlet is provided on the lower part of one side of the heating box, and an exhaust gas outlet is provided on the upper part of the other side.
[0013] Optionally, the liquid coating mixing tank includes a tank body, a stirring structure rotatably disposed within the tank body, a dry powder coating inlet and a mixing water inlet located at the top of the tank body, and a discharge port located at the bottom of the tank body. The discharge port is directly opposite the gap between the forming rollers and is located between the reinforcing body and the corresponding breathable membrane. The dry powder coating inlet is connected to the conveying pipe, and the mixing water inlet is connected to a water source.
[0014] Optionally, the side groove pressure roller group includes an upper side groove pressure roller and a lower side groove pressure roller, and one side of the upper side groove pressure roller and the opposite side of the lower side groove pressure roller both have concave and convex grooves.
[0015] Optionally, both the curing zone and the cooling zone include a plurality of rotating rollers, with adjacent rollers arranged alternately.
[0016] The modified cement-based waterproof membrane and its preparation system provided by this utility model have the following advantages compared with the prior art:
[0017] The roll material features an innovative design with grooved edges at the overlap. During construction, modified cement slurry is applied, and the grooves of the roll material are pressed together and interlocked with a zipper-like mechanism, ensuring reliable waterproofing.
[0018] An ultra-thin (0.2-0.3mm) substrate is used as the reinforcing layer, achieving an overall roll thickness of approximately 2mm. The fiberglass mesh reinforced acrylic felt (GA) exhibits excellent tensile properties, effectively resisting deformation of the substrate and preventing damage to the roll.
[0019] Using a breathable isolation membrane facilitates the escape of moisture from the coating when it is heated, while also preventing paint overflow, which is beneficial for the production, storage, and construction of roll materials.
[0020] Construction safety. Cold construction, no open flame, construction is not restricted in enclosed spaces or poorly ventilated environments, ensuring safety and reliability. Attached Figure Description
[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:
[0022] Figure 1 This is a schematic diagram of waterproof membrane;
[0023] Figure 2 This is a flowchart of the waterproof membrane forming process;
[0024] Figure 3 This is a schematic diagram of the cross-section of the side groove pressure roller.
[0025] The components are as follows: 1. First winding frame; 2. Mixing water inlet; 3. Dry powder coating inlet; 4. Liquid coating mixing tank; 5. Discharge port; 6. Second winding frame; 7. Forming roller; 8. Heating box; 9. Directional roller; 10. Side groove pressure roller group; 11. Curing zone; 12. Cooling zone; 13. Roller; 14. Winding frame; 15. Hot air inlet; 16. Exhaust gas outlet; 17. Powder coating preparation tank; 18. Conveying pipe; 19. First breathable isolation membrane; 20. First coating layer; 21. Reinforcing body; 22. Second coating layer; 23. Second breathable isolation membrane; 24. First overlapping edge pressure groove; 25. Second overlapping edge pressure groove; 26. Upper edge groove pressure roller; 27. Lower edge groove pressure roller. Detailed Implementation
[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.
[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.
[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.
[0030] In addition, the term "multiple" should mean two or more.
[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0032] like Figure 1 As shown, a modified cement-based waterproof membrane includes a waterproof membrane body. The upper surface of one side of the waterproof membrane body has a first overlapping edge groove 24 extending along its length direction, and the lower surface of the other side of the waterproof membrane body has a second overlapping edge groove 25 extending along its length direction. A first breathable isolation membrane 19, a first coating layer 20, a reinforcing body 21, a second coating layer 22, and a second breathable isolation membrane 23 are sequentially arranged.
[0033] During construction, when adjacent waterproof membranes need to overlap to maintain waterproofing, the first overlap groove 24 and the second overlap groove 25 of the adjacent waterproof membrane bodies are used in conjunction. Cement slurry is also applied during construction. The grooves of the membrane are pressed and interlocked, forming a zipper-like interlock, which greatly improves waterproofing reliability. The cold processing method is not only convenient to operate, but also eliminates the need for open flame construction, making it energy-saving and environmentally friendly.
[0034] The thickness of the waterproof membrane body is 1.5-2.5mm, and the reinforcing core 21 is made of polyester felt or fiberglass mesh reinforced acrylic felt with a thickness of 0.2-0.3mm. Thus, using an ultra-thin (0.2-0.3mm) core as the reinforcing layer achieves an overall membrane thickness of approximately 2mm. Fiberglass mesh reinforced acrylic felt (GA) has excellent tensile properties, effectively resisting deformation of the substrate and preventing damage to the membrane.
[0035] The first breathable isolation membrane 19 and the second breathable isolation membrane 23 are breathable polymer membranes coated with silicone oil on one side. The breathable polymer membrane includes a breathable polyethylene membrane or a breathable polyvinylidene fluoride membrane, with a thickness of 1.0-1.5 mils. Using a breathable isolation membrane is beneficial for the escape of water vapor when the coating is heated. At the same time, the breathable membrane prevents the coating from overflowing, which is beneficial for the production, storage and construction of the roll material.
[0036] like Figure 2 , Figure 3 As shown, a preparation system for a modified cement-based waterproof membrane includes a first winding frame 1 for winding a reinforcing substrate 21, a powder coating preparation tank 17 for storing dry powder coating, two liquid coating mixing tanks 4 connected to the powder coating preparation tank 17 via a feed pipe 18, a pair of forming rollers 7, two second winding frames 6 corresponding to the forming rollers 7 for winding a breathable membrane, a heating box 8, a side groove pressure roller group 10 disposed within the heating box 8, a curing zone 11, a cooling zone 12 disposed outside the heating box 8, and a take-up frame.
[0037] A hot air inlet 15 is provided on the lower part of one side of the heating box 8, and an exhaust gas outlet 16 is provided on the upper part of the other side.
[0038] The liquid coating mixing tank 4 includes a tank body, a stirring structure rotatably disposed in the tank body, a dry powder coating inlet 3 and a mixing water inlet 2 opened at the top of the tank body, and a discharge port 5 disposed at the bottom of the tank body. The discharge port 5 is directly opposite the gap between the forming rollers 7 and is located between the reinforcing body 21 and the corresponding breathable membrane. The dry powder coating inlet 3 is connected to the conveying pipe 18, and the mixing water inlet 2 is connected to a water source.
[0039] The side groove pressure roller group 10 includes an upper side groove pressure roller 26 and a lower side groove pressure roller 27. One side of the upper side groove pressure roller 26 and the opposite side of the lower side groove pressure roller 27 both have concave and convex grooves.
[0040] Both the curing zone 11 and the cooling zone 12 include a plurality of rotating rollers 13, and adjacent rollers 13 are staggered.
[0041] The manufacturing process is as follows:
[0042] (1) Powder coating preparation tank 17 produces a sufficient amount of dry powder coating for later use;
[0043] (2) The 0.3mm thick polyester felt reinforced body 21 is removed from the first winding frame 1, and the breathable isolation film is removed from the second winding frame 6. Figure 2 The material passes sequentially through forming roller 7, heating chamber 8, turning roller 9, side groove pressure roller, curing zone 11, and cooling zone 12. Hot air at 75-85℃ is introduced through hot air inlet 15 and kept at a constant temperature for 10-20 minutes.
[0044] (3) Start the production line and control the traction speed of the tire body 21 at (5-10) m / min to ensure the normal operation of the production line;
[0045] (4) Powdered coating is added to liquid coating mixing tank 4 through dry powder coating inlet 3 via conveying pipe 18 (the amount of material is sufficient for continuous molding). At the same time, water is metered and added through mixing water inlet 2. The mixture is quickly stirred for 3-5 minutes to form liquid coating. The material is simultaneously discharged from both sides of discharge port 55 to forming roller 77. The thickness of the roll is controlled by forming roller 7, and the coating is pressed and adhered to both sides of the reinforcing body 21 and covered with a breathable isolation film.
[0046] (5) The roll material then enters the heating chamber 8;
[0047] (6) The roll material is squeezed by the edge groove roller, and the upper and lower ends of the longitudinal direction show concave and convex grooves;
[0048] (7) The roll material is further dried and cured in curing zone 11;
[0049] (8) The roll material exits the heating box 8 and is cooled in the cooling zone 12;
[0050] (9) Inspect the appearance of the roll material and roll it up to obtain the modified cement-based waterproof roll material of the present invention.
[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A modified cement-based waterproof membrane, characterized in that, The waterproof membrane includes a waterproof membrane body, wherein the upper surface of one side of the waterproof membrane body has a first overlapping edge groove extending along its length, and the lower surface of the other side of the waterproof membrane body has a second overlapping edge groove extending along its length, and a first breathable isolation membrane, a first coating layer, a reinforcing body, a second coating layer, and a second breathable isolation membrane are sequentially arranged.
2. The modified cement-based waterproof membrane as described in claim 1, characterized in that: The thickness of the waterproof membrane body is 1.5-2.5mm.
3. The modified cement-based waterproof membrane as described in claim 1, characterized in that: The reinforcing carcass is made of polyester felt or fiberglass mesh reinforced acrylic felt, with a thickness of 0.2-0.3 mm.
4. The modified cement-based waterproof membrane as described in claim 1, characterized in that: The first and second breathable isolation membranes are breathable polymer membranes coated with silicone oil on one side. The breathable polymer membranes include breathable polyethylene membranes or breathable polyvinylidene fluoride membranes, with a thickness of 1.0-1.5 mils.
5. The modified cement-based waterproof membrane as described in claim 1, characterized in that: The first overlapping edge groove and the second overlapping edge groove of the adjacent waterproof membrane body cooperate with each other and are interlocked by cement slurry.
6. A preparation system for a modified cement-based waterproof membrane as described in any one of claims 1-5, characterized in that: It includes a first winding frame for winding the reinforcing carcass, a powder coating preparation tank for storing dry powder coating, two liquid coating mixing tanks connected to the powder coating preparation tank via a conveying pipe, a pair of forming rollers, two second winding frames corresponding to the forming rollers for winding the breathable membrane, a heating box, a side groove pressure roller group disposed in the heating box and a curing zone, a cooling zone disposed outside the heating box and a take-up frame.
7. The preparation system for the modified cement-based waterproof membrane as described in claim 6, characterized in that: A hot air inlet is provided on the lower part of one side of the heating box, and an exhaust gas outlet is provided on the upper part of the other side.
8. The preparation system for the modified cement-based waterproof membrane as described in claim 6, characterized in that: The liquid coating mixing tank includes a tank body, a stirring structure rotatably disposed within the tank body, a dry powder coating inlet and a mixing water inlet located at the top of the tank body, and a discharge port located at the bottom of the tank body. The discharge port is directly opposite the gap between the forming rollers and is located between the reinforcing body and the corresponding breathable membrane. The dry powder coating inlet is connected to the conveying pipe, and the mixing water inlet is connected to a water source.
9. The preparation system for the modified cement-based waterproof membrane as described in claim 6, characterized in that: The side groove pressure roller group includes an upper side groove pressure roller and a lower side groove pressure roller. One side of the upper side groove pressure roller and the opposite side of the lower side groove pressure roller both have concave and convex grooves.
10. The preparation system for the modified cement-based waterproof membrane as described in claim 6, characterized in that: Both the curing zone and the cooling zone include several rotating rollers, and adjacent rollers are staggered.