A waterproof structure for bathrooms
By using a combination of multi-layer polyurethane waterproofing layers and fiber cloth in the bathroom waterproofing structure, along with the fixing method of stainless steel plates and plastic water pipes, the problems of uneven coating and leakage at the joints are solved, achieving a highly efficient and environmentally friendly waterproofing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAN YOUHE NEW WATERPROOF MATERIALS CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-06-09
AI Technical Summary
Existing waterproofing technologies for houses suffer from problems such as uneven coating, easy leakage at joints, and complex construction, making it difficult to achieve long-term waterproofing effects, especially in special areas such as bathrooms.
A waterproof structure consisting of a first polyurethane waterproof layer, a first fiber cloth, a second polyurethane waterproof layer, a second fiber cloth, and a third polyurethane waterproof layer is adopted. Drainage pipes are installed through holes, and stainless steel plates and plastic threaded water pipes are used for fixing during construction to form an integral waterproof layer.
It improves the toughness and durability of the waterproof layer, reduces the risk of cracking and water seepage, simplifies the construction process, meets environmental protection standards, and has a high material utilization rate.
Smart Images

Figure CN224338424U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building waterproofing structures, and in particular to a waterproofing structure for bathrooms. Background Technology
[0002] During house construction, waterproofing materials need to be applied to areas such as the roof, bathrooms, and balconies with drainage outlets to prevent leaks. After the waterproofing layer is applied, a water tightness test is required, which often involves the use of a drainage device specifically designed for building waterproofing.
[0003] Existing methods for waterproofing houses include the following two:
[0004] 1. Water-based coatings are applied multiple times to form a waterproof layer. However, manual application results in uneven coating and the waterproof areas are subject to thermal expansion and contraction, which can cause cracking and prevent long-term waterproofing.
[0005] 2. Multiple spliced waterproof membranes are used for laying (general waterproof membranes are small in size, so splicing is necessary). However, due to the influence of the materials at the splicing positions, water leakage is prone to occur at the joints, and the treatment of the intended drainage points is poor.
[0006] For example, Chinese patent 202420466644.9 has a relatively complex structure and is difficult to construct. Utility Model Content
[0007] The main purpose of this invention is to propose a waterproof structure for bathrooms, aiming to improve the waterproof effect of bathrooms by addressing the problem that existing single materials and coatings cannot achieve good waterproofing.
[0008] To achieve the above objectives, this utility model proposes a waterproof structure for bathrooms, comprising:
[0009] A waterproof structure comprising, from bottom to top, a first polyurethane waterproof layer, a first fiber cloth, a second polyurethane waterproof layer, a second fiber cloth, and a third polyurethane waterproof layer;
[0010] Holes are provided at predetermined positions after the waterproof structure is formed. These holes are used to install drainage pipes.
[0011] In actual processing, the waterproof structure consists of a first polyurethane waterproof layer, a first fiber cloth, a second polyurethane waterproof layer, a second fiber cloth, and a third polyurethane waterproof layer. The first and second fiber cloths are less expensive than existing waterproof materials, and their area is more flexible, making it easier to obtain materials for larger areas.
[0012] The first, second, and third polyurethane waterproof layers are formed by foaming a coating layer and bonding it to the corresponding fiber cloth layer, then compressing it into a single, complete material. This compression can be done on-site or by processing the material at a predetermined location before placing it in the appropriate processing environment.
[0013] The fiber cloth provides good support and fit, thus forming the skeleton of the polyurethane waterproof layer for easy movement. The polyurethane waterproof layer material is relatively simple, and has good waterproof and deformability, effectively improving the waterproof effect.
[0014] After the waterproof structure is installed in the bathroom, the concrete layer is poured to complete the bathroom installation.
[0015] The specific processing steps include:
[0016] 1. The new waterproof material is a complete sheet formed by combining and foaming several polyurethane waterproof coatings.
[0017] 2. Clean the floor; the drain hole must be flush with the floor and there should be no protrusions.
[0018] 3. The materials should be calculated including the height of the four walls (20cm). After gluing to the walls, the corner materials should be folded into a right triangle. Do not cut them; use adhesive tape to hold them in place.
[0019] 4. After the waterproof material is laid flat, make the drain hole, attach a stainless steel plate to the upper and lower walls of the waterproof structure at the hole, and tighten it with the corresponding plastic threaded water pipe, and apply joint adhesive.
[0020] Its advantages are:
[0021] ① The material is tough and can expand and contract, so even if it cracks in the corresponding waterproof area, it will not leak water;
[0022] ② The material is 1.5-2mm thick, making it stronger and more durable than traditional materials;
[0023] ③ The material is a single sheet, with no risk of water seepage;
[0024] ④ It can be customized according to size, so there will be no waste of materials;
[0025] ⑤ The material has high durability;
[0026] ⑥ Convenient construction, environmentally friendly materials, and in compliance with national standards. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the present invention installed on a predetermined template;
[0028] Figure 2 This is a cross-sectional view of the present invention;
[0029] Figure 3 This is a schematic diagram of the present invention.
[0030] In the picture,
[0031] 11 First polyurethane waterproof layer, 12 Second polyurethane waterproof layer, 13 Third polyurethane waterproof layer,
[0032] 21 First fiber cloth, 22 Second fiber cloth,
[0033] 3 holes
[0034] 4. Stainless steel plate
[0035] 5. Side section, 51. Folded section. Detailed Implementation
[0036] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0037] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0039] like Figures 1 to 3 As shown, a waterproof structure for a bathroom includes:
[0040] A waterproof structure comprising, from bottom to top, a first polyurethane waterproof layer 11, a first fiber cloth 21, a second polyurethane waterproof layer 12, a second fiber cloth 22, and a third polyurethane waterproof layer 13.
[0041] Hole 3: After the waterproof structure is formed, hole 3 is opened at a predetermined position. Hole 3 is used to install drainage pipes.
[0042] In actual processing, the waterproof structure consists of a first polyurethane waterproof layer 11, a first fiber cloth 21, a second polyurethane waterproof layer 12, a second fiber cloth 22, and a third polyurethane waterproof layer 13. The first fiber cloth 21 and the second fiber cloth 22 have lower costs compared to existing waterproof materials, and their area options are greater, making it easier to obtain materials for larger areas.
[0043] The first polyurethane waterproof layer 11, the second polyurethane waterproof layer 12, and the third polyurethane waterproof layer are formed by foaming the coating layer and bonding it with the corresponding fiber cloth layer, and then compressing it into a complete material. The compression can be carried out on-site (preferred embodiment) or processed in a predetermined place and then placed in the corresponding processing environment (mainly used in some non-standard places).
[0044] The fiber cloth provides good support and fit, thus forming the skeleton of the polyurethane waterproof layer for easy movement. The polyurethane waterproof layer material is relatively simple, and has good waterproof and deformability, effectively improving the waterproof effect.
[0045] After the waterproof structure is installed in the bathroom, the concrete layer is poured to complete the bathroom installation.
[0046] The specific processing steps include:
[0047] 1. The new waterproof material is a complete sheet formed by combining and foaming several polyurethane waterproof coatings.
[0048] 2. Clean the floor; the drain hole must be flush with the floor and there should be no protrusions.
[0049] 3. The materials should be calculated including the height of the four walls (20cm). After gluing to the walls, the corner materials should be folded into a right triangle. Do not cut them; use adhesive tape to hold them in place.
[0050] 4. After the waterproof material is spread out, make the drain hole. Attach a stainless steel plate to the upper and lower walls of the waterproof structure at hole 3, and tighten it with the corresponding plastic threaded water pipe. Apply joint adhesive.
[0051] Its advantages are:
[0052] ① The material is tough and can expand and contract, so even if it cracks in the corresponding waterproof area, it will not leak water;
[0053] ② The material is 1.5-2mm thick, making it stronger and more durable than traditional materials;
[0054] ③ The material is a single sheet, with no risk of water seepage;
[0055] ④ It can be customized to size, so there will be no waste of materials;
[0056] ⑤ The material has high durability;
[0057] ⑥ Convenient construction, environmentally friendly materials, and in compliance with national standards.
[0058] Specifically, the waterproof structure is a sheet that extends upward from the horizontal plane to form a side portion 5, wherein the side portion 5 is higher than the horizontal plane, thereby ensuring the overall waterproofness of the bathroom.
[0059] In this embodiment of the utility model, the minimum height of the side portion 5 is 15CM-30CM. Through reasonable height design, the waterproof effect of construction is guaranteed, and the predetermined waterproof requirements are also met.
[0060] Specifically, the side portion 5 is adhered to the wall surface, where waterproof adhesive can be used for fixation.
[0061] In this embodiment of the utility model, stainless steel plates 4 are respectively attached to the upper and lower walls of the waterproof structure located at the hole position 3, wherein the stainless steel plates 4 and the pipe can be interference fit, elastic fit or threaded fit.
[0062] Carbon fiber cloth, also known as carbon fiber cloth, carbon fiber fabric, carbon fiber cloth, carbon cloth, carbon fiber woven fabric, carbon fiber tape, carbon fiber sheet (prepreg), etc., is a composite material made of carbon fiber. It has extremely high strength, is ultra-lightweight, and is resistant to high temperature and high pressure.
[0063] In actual tests, the five-layer structure showed better waterproofing and durability. Of course, it can also be a combination of alternating polyurethane waterproofing layers and fiber cloth layers.
[0064] Polyurethane waterproof coating, also known as polyurethane coating material, is a type of polymer waterproof coating with polyurethane resin as the main film-forming substance. It is composed of a mixture of isocyanate-based curing agents and other additives in a specific ratio, without tar or asphalt additives. It is a single-component, environmentally friendly waterproof coating applied in a liquid state. It cures upon contact with moisture in the air, forming a strong, tough, seamless, and integral waterproof membrane on the substrate surface. This type of coating is a reaction-curing (moisture-curing) coating, characterized by high strength, high elongation, good water resistance, environmental friendliness, dense film, and easy application. It has strong adaptability to substrate deformation and is suitable for waterproofing projects in various underground buildings, kitchens, toilets, bathrooms, and restrooms. When using polyurethane waterproof coating, the substrate must be flat and clean.
[0065] Specifically, the stainless steel plate 4 is bonded to the wall surface of the waterproof structure using waterproof adhesive.
[0066] In this embodiment of the utility model, the first polyurethane waterproof layer 11, the second polyurethane waterproof layer 12, and the third polyurethane waterproof layer are coatings.
[0067] Specifically, the foaming treatment of the coating can improve both the degree of deformation and the degree of adhesion to the fiber cloth.
[0068] In this embodiment of the utility model, the side portion 5 is provided with a folded portion 51 at the corner end.
[0069] Specifically, the folded portion 51 extends outward and is glued to the side portion 5, further improving the waterproof effect and avoiding water leakage problems caused by cutting.
[0070] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A waterproof structure for bathrooms, characterized in that, include: A waterproof structure comprising, from bottom to top, a first polyurethane waterproof layer, a first fiber cloth, a second polyurethane waterproof layer, a second fiber cloth, and a third polyurethane waterproof layer; Holes are provided at predetermined positions after the waterproof structure is formed. These holes are used to install drainage pipes.
2. The waterproof structure for bathrooms as described in claim 1, characterized in that: The waterproof structure is a sheet, which extends upward from the horizontal plane to form a side portion.
3. The waterproof structure for bathrooms as described in claim 2, characterized in that: The minimum height of the side section is 15CM-30CM.
4. The waterproof structure for bathrooms as described in claim 2, characterized in that: The side is adhered to the wall.
5. The waterproof structure for bathrooms as described in claim 1, characterized in that: The waterproof structure has stainless steel plates attached to the upper and lower walls of the hole.
6. The waterproof structure for bathrooms as described in claim 5, characterized in that: The stainless steel plate is bonded to the wall surface of the waterproof structure with waterproof adhesive.
7. The waterproof structure for bathrooms as described in claim 1, characterized in that: The first, second, and third polyurethane waterproof layers are coatings.
8. The waterproof structure for a bathroom as described in claim 7, characterized in that: The coating foaming treatment.
9. The waterproof structure for bathrooms as described in claim 2, characterized in that: The side portion has a folded section at the corner end.
10. The waterproof structure for a bathroom as described in claim 9, characterized in that: The folded portion extends outward and is then glued to the side portion.