Waterproof vapor-permeable film for building doors and windows

Abstract

The utility model provides a waterproof vapor-permeable membrane for building doors and windows, which relates to the field of vapor-permeable membranes for building doors and windows and comprises a door and window waterproof membrane body, a back adhesive layer is coated on the lower surface of the door and window waterproof membrane body, and an alkali-resistant non-woven fabric surface layer is arranged on the upper surface of the door and window waterproof membrane body. A PTFE film layer is arranged at the lower end of the alkali-resistant non-woven fabric surface layer in a hot-pressing mode through a first polyurethane fiber layer, a PE film layer is arranged at the lower end of the PTFE film layer in a hot-pressing mode through a second polyurethane fiber layer, and an alkali-resistant non-woven fabric inner layer is attached to the lower end face of the PE film layer in a hot-pressing mode. The waterproof vapor-permeable film solves the problem that the service life of the waterproof vapor-permeable film is affected by ultraviolet irradiation of the PE film layer on the outer side of the core layer in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of building door and window breathable membrane technology, specifically to a waterproof and breathable membrane for building doors and windows. Background Technology

[0002] Breathable membranes are frequently used in the construction industry for doors, windows, and through-wall pipes. Waterproof breathable membranes are a new type of high-polymer waterproof material with much higher technical requirements than ordinary waterproof materials. While enhancing the airtightness and watertightness of buildings, they also require the rapid expulsion of moisture from the structure to prevent mold growth and protect property value. A search revealed an existing technology (publication number: CN202120831798.X) for a waterproof breathable membrane in construction. The paper describes that "the core layer of this utility model's waterproof breathable membrane is a three-dimensional structural layer formed by aggregated polyolefin fibers, which not only effectively improves the breathability of the waterproof breathable membrane, allowing moisture to escape quickly and preventing mold growth and protecting property value, but also improves the strength of the waterproof breathable membrane to a certain extent, facilitating its installation and use." However, the existing technology suffers from the problem that the PE film layer on the outer side of the core layer is affected by ultraviolet radiation, impacting the service life of the waterproof breathable membrane. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, a waterproof and breathable membrane for building doors and windows is provided to solve the problem that the service life of the waterproof and breathable membrane is affected by ultraviolet radiation on the outer PE film layer of the core layer in existing technologies.

[0004] To achieve the above objectives, a waterproof and breathable membrane for building doors and windows is provided, comprising: a waterproof membrane body, wherein the lower surface of the waterproof membrane body is coated with an adhesive backing layer.

[0005] The upper surface of the waterproof membrane body for doors and windows is provided with an alkali-resistant non-woven fabric surface layer. A PTFE film layer is hot-pressed onto the lower end of the alkali-resistant non-woven fabric surface layer through a first polyurethane fiber layer. A PE film layer is hot-pressed onto the lower end of the PTFE film layer through a second polyurethane fiber layer. An alkali-resistant non-woven fabric inner layer is hot-pressed onto the lower end of the PE film layer.

[0006] Furthermore, the surface of the alkali-resistant nonwoven fabric is coated with a waterproof coating layer.

[0007] Furthermore, the lower surface of the alkali-resistant nonwoven fabric layer is coated with a waterproof coating layer and then bonded with an adhesive backing layer.

[0008] Furthermore, the first polyurethane fiber layer and the second polyurethane fiber layer are bonded to the surface of the PTFE membrane layer in a honeycomb mesh pattern.

[0009] Furthermore, the thickness of both the PTFE membrane layer and the PE membrane layer is 0.1-0.5 mm.

[0010] Furthermore, the thickness of the alkali-resistant nonwoven fabric surface layer and the alkali-resistant nonwoven fabric inner layer is 0.3-0.5 mm.

[0011] Furthermore, the lower end of the waterproof membrane body for doors and windows is bonded with self-adhesive paper via an adhesive backing layer.

[0012] The beneficial effects of this utility model are as follows: the waterproof and breathable membrane for building doors and windows utilizes a PTFE membrane layer and a PE membrane layer to form a waterproof and breathable membrane core structure layer. The PTFE membrane layer blocks external ultraviolet radiation from irradiating the PE membrane layer, effectively enhancing the waterproof and breathable performance of the door and window waterproof and breathable membrane. At the same time, it reduces the damage to the waterproof and breathable membrane caused by the external environment and improves the service life of the building door and window waterproof and breathable membrane. The polyurethane fiber layers bonded to both sides of the PTFE membrane layer facilitate further protection and buffering of external impact forces, preventing the PTFE membrane layer from breaking upon impact. Attached Figure Description

[0013] Figure 1 This is a front view cross-sectional structural diagram of the waterproof and breathable membrane according to an embodiment of the present invention.

[0014] Figure 2 This is a front view cross-sectional diagram of the connection structure of the PTFE membrane layer and the PE membrane layer in an embodiment of the present invention.

[0015] Figure 3 This is a three-dimensional structural diagram of the waterproof and breathable membrane according to an embodiment of the present invention.

[0016] Figure 4 This is a front view schematic diagram of the bonding structure of the waterproof and breathable membrane according to an embodiment of the present invention.

[0017] In the diagram: 1. Waterproof membrane body for doors and windows; 2. Alkali-resistant non-woven fabric surface layer; 21. Waterproof coating layer; 3. PTFE membrane layer; 31. First polyurethane fiber layer; 32. Second polyurethane fiber layer; 4. PE membrane layer; 5. Alkali-resistant non-woven fabric layer; 51. Adhesive backing layer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1 to 4 As shown, this utility model provides a waterproof and breathable membrane for building doors and windows, including: a waterproof membrane body 1, the lower surface of which is coated with an adhesive layer 51.

[0020] The upper surface of the waterproof membrane body 1 is provided with an alkali-resistant non-woven fabric surface layer 2. The lower end of the alkali-resistant non-woven fabric surface layer 2 is hot-pressed with a PTFE membrane layer 3 through a first polyurethane fiber layer 31. The lower end of the PTFE membrane layer 3 is hot-pressed with a PE membrane layer 4 through a second polyurethane fiber layer 32. The lower end of the PE membrane layer 4 is hot-pressed with an alkali-resistant non-woven fabric inner layer 5.

[0021] The main body 1 of the waterproof membrane for doors and windows consists of a PTFE membrane layer 3 and a PE membrane layer 4, forming a waterproof and breathable membrane core structure. The PTFE membrane layer 3 blocks external ultraviolet radiation from the PE membrane layer 4, effectively enhancing the waterproof and breathable performance of the waterproof membrane for doors and windows. At the same time, it reduces the damage to the waterproof membrane caused by the external environment and improves the service life of the waterproof membrane for building doors and windows. The polyurethane fiber layers bonded to both sides of the PTFE membrane layer 3 provide further protection and buffer against external impacts, preventing the PTFE membrane layer 3 from breaking upon impact.

[0022] In this embodiment, a waterproof coating layer 21 is sprayed onto the upper surface of the alkali-resistant nonwoven fabric surface layer 2. An adhesive backing layer 51 is coated and bonded to the lower surface of the alkali-resistant nonwoven fabric layer 5 through the waterproof coating layer 21.

[0023] As a preferred implementation, the alkali-resistant nonwoven fabric surface layer 2 and the alkali-resistant nonwoven fabric inner layer 5 of the door and window waterproof membrane body 1 enhance the tensile strength of the breathable membrane, improving the efficiency of storage, construction, and use of the door and window waterproof membrane body 1. Furthermore, the alkali-resistant nonwoven fabric surface layer 2 and the alkali-resistant nonwoven fabric inner layer 5 are made of ultra-soft, alkali-resistant nonwoven fabric, further enhancing the alkali resistance of the door and window waterproof membrane body 1. The door and window waterproof membrane body 1 adopts a "two-layer membrane core" structure, facilitating efficient enhancement of waterproof and breathable performance.

[0024] In this embodiment, the first polyurethane fiber layer 31 and the second polyurethane fiber layer 32 are bonded to the surface of the PTFE membrane layer 3 in a honeycomb mesh pattern. The thickness of both the PTFE membrane layer 3 and the PE membrane layer 4 is 0.1-0.5 mm. The thickness of the alkali-resistant nonwoven fabric surface layer 2 and the alkali-resistant nonwoven fabric inner layer 5 is 0.3-0.5 mm.

[0025] As a preferred embodiment, the honeycomb mesh first polyurethane fiber layer 31 and second polyurethane fiber layer 32 have good elasticity and wear resistance, and can resist various external forces of compression and tension, protect the inner PTFE membrane layer 3 and PE membrane layer 4 from damage, and improve the service life of the door and window waterproof membrane body 1.

[0026] In this embodiment, the lower end of the door and window waterproof membrane body 1 is bonded with self-adhesive paper through the backing layer 51.

[0027] As a preferred implementation method, the door and window waterproof membrane body 1 is bonded to the self-adhesive layer 51 with a release paper, which facilitates more precise positioning of the door and window waterproof membrane body 1 and ensures that the door and window waterproof membrane body 1 can be fully bonded to the gaps of the building doors and windows.

[0028] This utility model of waterproof and breathable membrane for building doors and windows can effectively solve the problem that the service life of waterproof and breathable membranes is affected by ultraviolet radiation on the outer PE film layer of the core layer in the prior art. It effectively enhances the waterproof and breathable performance of waterproof and breathable membranes for doors and windows, while reducing the damage of the external environment to the waterproof and breathable membrane, and improving the service life of waterproof and breathable membranes for building doors and windows. It is suitable for waterproof and breathable membranes for building doors and windows.

[0029] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waterproof and breathable membrane for building doors and windows, comprising: The waterproof membrane body (1) for doors and windows, wherein the lower surface of the waterproof membrane body (1) is coated with an adhesive backing layer (51), characterized in that: The upper surface of the waterproof membrane body (1) of the door and window is provided with an alkali-resistant non-woven fabric surface layer (2). The lower end of the alkali-resistant non-woven fabric surface layer (2) is hot-pressed with a PTFE membrane layer (3) through a first polyurethane fiber layer (31). The lower end of the PTFE membrane layer (3) is hot-pressed with a PE membrane layer (4) through a second polyurethane fiber layer (32). The lower end of the PE membrane layer (4) is hot-pressed with an alkali-resistant non-woven fabric inner layer (5).

2. The waterproof and breathable membrane for building doors and windows according to claim 1, characterized in that, The surface of the alkali-resistant nonwoven fabric (2) is coated with a waterproof coating layer (21).

3. The waterproof and breathable membrane for building doors and windows according to claim 1, characterized in that, The lower surface of the alkali-resistant nonwoven fabric layer (5) is coated with a waterproof coating layer (21) and then bonded with an adhesive backing layer (51).

4. The waterproof and breathable membrane for building doors and windows according to claim 1, characterized in that, The first polyurethane fiber layer (31) and the second polyurethane fiber layer (32) are attached to the surface of the PTFE membrane layer (3) in a honeycomb mesh pattern.

5. A waterproof and breathable membrane for building doors and windows according to claim 1, characterized in that, The thickness of both the PTFE membrane (3) and the PE membrane (4) is 0.1-0.5 mm.

6. A waterproof and breathable membrane for building doors and windows according to claim 1, characterized in that, The thickness of the alkali-resistant nonwoven fabric surface layer (2) and the alkali-resistant nonwoven fabric inner layer (5) is 0.3-0.5 mm.

7. A waterproof and breathable membrane for building doors and windows according to claim 1, characterized in that, The lower end of the waterproof membrane body (1) for doors and windows is bonded with self-adhesive release paper through the backing layer (51).

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