Composite film capable of blocking water vapor

Abstract

The utility model relates to the technical field of composite films, and discloses a composite film capable of blocking water vapor, which comprises an adhesion layer, the top surface of the adhesion layer is fixedly connected with a second water vapor blocking film layer, the top surface of the second water vapor blocking film layer is fixedly connected with a film body layer, the top surface of the film body layer is fixedly connected with a first water vapor blocking film layer, and the top surface of the first water vapor blocking film layer is fixedly connected with a second water vapor blocking film layer. According to the utility model, the composite film has the effect of isolating water vapor through the water vapor isolating film layers, so that the situation that the interior is damaged due to the fact that water vapor enters the interior in a humid environment is avoided, and meanwhile, due to the effect of the two water vapor isolating film layers, the water vapor can be prevented from entering the interior; and when the outer moisture-proof spacing layer is warped, the inner moisture-proof film layer still has water-proof property.

Description

Technical Field

[0001] This utility model relates to the field of composite membrane technology, specifically a composite membrane that can block water vapor. Background Technology

[0002] Composite film refers to a multi-layered film formed by bonding various plastics with paper, metal or other materials through processes such as lamination, extrusion, and co-extrusion. Composite film generally consists of a substrate, laminating adhesive, barrier material, heat-sealing material, printing and protective coating, etc.

[0003] Composite membranes are used in a wide range of fields, which makes the environments in which they are used quite complex. In particular, humid environments can easily affect the membrane and prevent it from effectively blocking water vapor, so improvements are needed. Therefore, we have proposed a composite membrane that can block water vapor. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a composite membrane that can block water vapor, thus solving the above-mentioned problems.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] A composite membrane capable of blocking water vapor includes an adhesive layer, a second water vapor barrier layer fixedly connected to the top surface of the adhesive layer, a membrane body layer fixedly connected to the top surface of the second water vapor barrier layer, a first water vapor barrier layer fixedly connected to the top surface of the membrane body layer, and a top protective breathable layer fixedly connected to the top surface of the first water vapor barrier layer.

[0007] Preferably, the membrane layer is composed of a polyethylene terephthalate protective layer, a polypropylene protective layer, and a polyethylene protective layer. The top surface of the second water-proof membrane layer is fixedly connected to a polyethylene terephthalate protective layer, the top surface of the polyethylene terephthalate protective layer is fixedly connected to a polypropylene protective layer, and the top surface of the polypropylene protective layer is fixedly connected to a polyethylene protective layer.

[0008] Preferably, the interior of the second water-proof vapor barrier layer is composed of a polyvinylidene chloride barrier layer and a stone-ground film layer. The top surface of the adhesive layer is fixedly connected to the polyvinylidene chloride barrier layer, the top surface of the polyvinylidene chloride barrier layer is fixedly connected to the stone-ground film layer, and the top surface of the stone-ground film layer is fixedly connected to the polyethylene terephthalate protective layer.

[0009] Preferably, the interior of the first water-proof vapor barrier layer is composed of a polyurethane adhesive bonding layer and a nano-mica composite film layer, and the top surface of the polyethylene protective layer is fixedly connected to the nano-mica composite film layer, and the top surface of the nano-mica composite film layer is fixedly connected to the polyurethane adhesive bonding layer.

[0010] Preferably, the adhesive layer is composed of an acrylic adhesive bonding layer and a protective adhesive transparent film layer, the bottom surface of the polyvinylidene chloride barrier layer is fixedly connected to the acrylic adhesive bonding layer, and the bottom surface of the acrylic adhesive bonding layer is fixedly connected to the protective adhesive transparent film layer.

[0011] Preferably, the top surface of the top protective breathable layer is fixedly connected with equidistantly distributed protective particles.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] This invention uses a water-proof vapor barrier layer to enable the composite membrane to function as a barrier against moisture, preventing moisture from entering the interior and causing internal damage in a humid environment. At the same time, the two water-proof vapor barrier layers ensure that even if the outer water-proof vapor barrier layer warps, the inner water-proof vapor barrier layer still retains its water-proof properties. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the membrane structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the first water-proof vapor film layer structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the second water-proof vapor film layer structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the adhesive layer structure of part of this utility model.

[0019] In the diagram: 1. Adhesive layer; 2. Second water-proof vapor barrier layer; 3. Membrane body layer; 4. First water-proof vapor barrier layer; 5. Top protective breathable layer; 6. Polyethylene terephthalate protective layer; 7. Polypropylene protective layer; 8. Polyethylene protective layer; 9. Polyvinylidene chloride barrier layer; 10. Stone-ground film layer; 11. Polyurethane adhesive bonding layer; 12. Nano-mica composite film layer; 13. Acrylic adhesive bonding layer; 14. Protective adhesive transparent film layer. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-5 This utility model provides a technical solution;

[0022] A composite membrane capable of blocking water vapor includes an adhesive layer 1, a second water vapor barrier layer 2 fixedly connected to the top surface of the adhesive layer 1, a membrane body layer 3 fixedly connected to the top surface of the second water vapor barrier layer 2, a first water vapor barrier layer 4 fixedly connected to the top surface of the membrane body layer 3, and a top protective breathable layer 5 fixedly connected to the top surface of the first water vapor barrier layer 4.

[0023] Furthermore, the membrane layer 3 is composed of a polyethylene terephthalate protective layer 6, a polypropylene protective layer 7, and a polyethylene protective layer 8. The top surface of the second water vapor barrier layer 2 is fixedly connected to the polyethylene terephthalate protective layer 6, the top surface of the polyethylene terephthalate protective layer 6 is fixedly connected to the polypropylene protective layer 7, and the top surface of the polypropylene protective layer 7 is fixedly connected to the polyethylene protective layer 8. The polyethylene terephthalate protective layer 6 provides the composite membrane with high mechanical strength, including tensile strength and tear strength, making it less prone to breakage during use and able to withstand certain external forces. The polypropylene protective layer 7 provides the composite membrane with good thermal stability, allowing it to withstand high temperatures without deformation or performance degradation. The polyethylene protective layer 8 provides the composite membrane with excellent flexibility.

[0024] Furthermore, the interior of the second water-vapor barrier layer 2 is composed of a polyvinylidene chloride barrier layer 9 and a stone-ground film layer 10. The top surface of the adhesive layer 1 is fixedly connected to the polyvinylidene chloride barrier layer 9, the top surface of the polyvinylidene chloride barrier layer 9 is fixedly connected to the stone-ground film layer 10, and the top surface of the stone-ground film layer 10 is fixedly connected to the polyethylene terephthalate protective layer 6. Through the function of the second water-vapor barrier layer 2, the composite membrane still has the function of preventing water vapor from rising even when the first water-vapor barrier layer 4 curls up at the edges.

[0025] Furthermore, the interior of the first water-proof vapor barrier layer 4 is composed of a polyurethane adhesive bonding layer 11 and a nano-mica composite film layer 12. The top surface of the polyethylene protective layer 8 is fixedly connected to the nano-mica composite film layer 12, and the top surface of the nano-mica composite film layer 12 is fixedly connected to the polyurethane adhesive bonding layer 11. Through the water-proof vapor barrier function of the first water-proof vapor barrier layer 4, external moisture is prevented from entering the inner side of the composite film.

[0026] Furthermore, the interior of the adhesive layer 1 is composed of an acrylic adhesive bonding layer 13 and a protective adhesive transparent film layer 14. The bottom surface of the polyvinylidene chloride barrier layer 9 is fixedly connected to the acrylic adhesive bonding layer 13, and the bottom surface of the acrylic adhesive bonding layer 13 is fixedly connected to the protective adhesive transparent film layer 14. Through the action of the adhesive layer 1, the acrylic adhesive bonding layer 13 can adhere the composite film to the outer surface to be used.

[0027] Furthermore, the top surface of the top protective breathable layer 5 is fixedly connected with equidistantly distributed protective particles. These protective particles change the friction coefficient of the top surface of the top protective breathable layer 5, thus preventing slippage or unwinding when using the composite film.

[0028] Working principle: When this invention is needed, the protective adhesive transparent film layer 14 is removed, and the acrylic adhesive layer 13 is attached to the outer surface to be used. The acrylic adhesive layer 13 connects the polyvinylidene chloride barrier layer 9 to the surface to be used. The polyvinylidene chloride barrier layer 9 acts as a barrier against external moisture. At the same time, the stone-ground film layer 10 on the top surface of the polyvinylidene chloride barrier layer 9 combines with the polyethylene terephthalate protective layer 6 to form a stone-ground / PET high-barrier composite film, which has excellent moisture barrier performance. Thus, the second moisture barrier film layer 2 isolates the interior from moisture. The membrane layer 3 on the top surface of the second water vapor barrier layer 2 is composed of an inner polyethylene terephthalate protective layer 6, a polypropylene protective layer 7, and a polyethylene protective layer 8. The polyethylene terephthalate protective layer 6 provides the composite membrane with good tensile and tear strength, while the polyethylene protective layer 8 provides good flexibility. The nano-mica composite film layer 12 on the top surface of the polyethylene protective layer 8 acts as a water vapor barrier on the outside, and the top protective breathable layer 5 and the nano-mica composite film layer 12 are stably connected by the polyurethane adhesive bonding layer 11.

[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 composite membrane capable of blocking water vapor, comprising an adhesive layer (1), characterized in that: The top surface of the adhesive layer (1) is fixedly connected to a second water-proof vapor membrane layer (2), the top surface of the second water-proof vapor membrane layer (2) is fixedly connected to a membrane body layer (3), the top surface of the membrane body layer (3) is fixedly connected to a first water-proof vapor membrane layer (4), and the top surface of the first water-proof vapor membrane layer (4) is fixedly connected to a top protective breathable layer (5).

2. The composite membrane capable of blocking water vapor according to claim 1, characterized in that: The membrane layer (3) is composed of a polyethylene terephthalate protective layer (6), a polypropylene protective layer (7), and a polyethylene protective layer (8). The top surface of the second water vapor barrier layer (2) is fixedly connected to the polyethylene terephthalate protective layer (6), the top surface of the polyethylene terephthalate protective layer (6) is fixedly connected to the polypropylene protective layer (7), and the top surface of the polypropylene protective layer (7) is fixedly connected to the polyethylene protective layer (8).

3. The composite membrane capable of blocking water vapor according to claim 2, characterized in that: The interior of the second water-proof vapor membrane layer (2) is composed of a polyvinylidene chloride barrier layer (9) and a stone-ground film layer (10). The top surface of the adhesive layer (1) is fixedly connected to the polyvinylidene chloride barrier layer (9), the top surface of the polyvinylidene chloride barrier layer (9) is fixedly connected to the stone-ground film layer (10), and the top surface of the stone-ground film layer (10) is fixedly connected to the polyethylene terephthalate protective layer (6).

4. The composite membrane capable of blocking water vapor according to claim 2, characterized in that: The interior of the first water-proof vapor membrane layer (4) is composed of a polyurethane adhesive bonding layer (11) and a nano-mica composite film layer (12). The top surface of the polyethylene protective layer (8) is fixedly connected to the nano-mica composite film layer (12), and the top surface of the nano-mica composite film layer (12) is fixedly connected to the polyurethane adhesive bonding layer (11).

5. A composite membrane capable of blocking water vapor according to claim 3, characterized in that: The interior of the adhesive layer (1) is composed of an acrylic adhesive bonding layer (13) and a protective adhesive transparent film layer (14). The bottom surface of the polyvinylidene chloride barrier layer (9) is fixedly connected to the acrylic adhesive bonding layer (13), and the bottom surface of the acrylic adhesive bonding layer (13) is fixedly connected to the protective adhesive transparent film layer (14).

6. The composite membrane capable of blocking water vapor according to claim 1, characterized in that: The top surface of the top protective breathable layer (5) is fixedly connected with equidistantly distributed protective particles.

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