Breathable waterproof protective film

Abstract

The utility model relates to the field of protective films, in particular to a breathable waterproof protective film which comprises a base layer film, a reinforcing film is fixed on the outer surface of the base layer film, a plurality of breathable holes are evenly formed in the reinforcing film, a net-shaped PTFE fiber layer is fixed on the outer surface of the reinforcing film, a surface layer film is fixed on the outer surface of the net-shaped PTFE fiber layer, and a waterproof layer is fixed on the surface layer film. The waterproof breathable film has the advantages that the waterproof breathable film has waterproof and breathable functions, the strength and puncture resistance of the waterproof breathable film can be effectively improved, and the food protection effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of protective films, in particular to a breathable and waterproof protective film. Background Art

[0002] Protective film is a plastic packaging product that can regulate the oxygen and moisture content around the preserved food, block dust, and thus extend the shelf life of the food.

[0003] After searching, an antibacterial, breathable and water-locking protective film with a publication number of CN216579511U is found, comprising a peeling layer, an antibacterial layer, a thermal insulation layer, a breathable and waterproof layer, a breathable and water-locking layer and a breathable and water-permeable layer, the peeling layer is adhered to the outside of the antibacterial layer by adhesive, the thermal insulation layer is adhered to the inside of the antibacterial layer, the breathable and waterproof layer is adhered to the inside of the thermal insulation layer, the breathable and water-locking layer is attached to the inside of the breathable and waterproof layer, the breathable and water-permeable layer is attached to the inside of the breathable and water-locking layer, the breathable and waterproof layer is made of a metallocene linear low-density and highly breathable polyethylene film with added high-pressure polyethylene, and the antibacterial layer is made of nano-silver material.

[0004] Although the above utility model patent has moderate oxygen permeability and good moisture retention and can adapt to high temperature and high humidity storage environments, its composite film has poor strength and is easily punctured, thereby losing its protective effect on food.

[0005] Therefore, it is necessary to invent a breathable and waterproof protective film. Utility Model Content

[0006] To this end, the utility model provides a breathable and waterproof protective film to solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a breathable and waterproof protective film, comprising a base film, a reinforcing film is fixed to the outer surface of the base film, a plurality of air holes are evenly opened on the reinforcing film, a mesh PTFE fiber layer is fixed to the outer surface of the reinforcing film, and a surface film is fixed to the outer surface of the mesh PTFE fiber layer.

[0008] Preferably, the reinforcing film is made of PET material, the thickness of the reinforcing film is set to 4-10 μm, and the diameter of the air holes is set to 1-1.5 mm.

[0009] Preferably, the surface film is made of LLDPE material, and the thickness of the surface film is set to 5-8 μm.

[0010] Preferably, the mesh PTFE fiber layer is a mesh porous structure formed by PTFE fibers interwoven horizontally and vertically, and the thickness of the mesh PTFE fiber layer is 6 to 8 μm.

[0011] Preferably, the base film is made of polypropylene, and the thickness of the base film is set to 8-15 μm.

[0012] The beneficial effect of the utility model is that through the coordinated use of the base membrane, the reinforcing membrane, the air holes, the mesh PTFE fiber layer and the surface membrane, while having the waterproof and breathable functions, it can also effectively increase its own strength and puncture resistance, thereby improving the protection effect on food. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural stereogram provided for the utility model;

[0014] Figure 2 A structural cross-sectional view provided by the utility model;

[0015] Figure 3 A structural cross-sectional view provided by the utility model;

[0016] Figure 4 This is a schematic structural diagram of the reinforcement membrane and the air holes provided by the utility model.

[0017] In the figure: 1. base membrane; 2. reinforcement membrane; 3. air permeability; 4. mesh PTFE fiber layer; 5. surface membrane. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0019] Please refer to the attached Figure 1-4The utility model provides a breathable and waterproof protective film, including a base film 1, the base film 1 is set to be a polypropylene material, and has a better breathable and waterproof effect. The thickness of the base film 1 is set to 8-15μm, and a reinforcing film 2 is fixed on the outer surface of the base film 1. The thickness of the reinforcing film 2 is set to 4-10μm. The reinforcing film 2 is set to be a PET material. The reinforcing film 2 of PET material has better strength and puncture resistance, thereby improving the strength and puncture resistance of the protective film. The thickness of the reinforcing film 2 is set to 4-10μm, and a plurality of air holes 3 are evenly opened on the reinforcing film 2. The aperture of the air hole 3 is set to 1-1.5mm, which can be used for ventilation, that is, the setting of the reinforcing film 2 does not affect the air permeability of the protective film. A mesh PTFE fiber layer 4 is fixed on the outer surface of the reinforcing film 2. The thickness of the mesh PTFE fiber layer 4 is 6-8μm. The mesh PTFE fiber layer 4 is a mesh porous structure formed by PTFE fibers interwoven horizontally and vertically. The mesh porous structure makes the PTFE fiber layer have excellent air permeability, and improves the mechanical strength and impact strength of the protective film. It can also be used to support the surface film 5 and the reinforcing film 2 to avoid denaturation or rupture of the protective film. The surface film 5 is fixed on the outer surface of the mesh PTFE fiber layer 4. The surface film 5 is set to LLDPE material, and the thickness of the surface film 5 is set to 5-8μm. The surface film 5 of LLDPE material has good waterproof and breathable effects, and has good cold resistance and weather resistance, and also has good puncture resistance and strength, which further improves the strength and puncture resistance of the protective film, and greatly improves the protection effect on food.

[0020] In the utility model: the reinforcing film 2 made of PET material has better strength and puncture resistance, thereby improving the strength and puncture resistance of the protective film, and a number of air holes 3 with a pore size of 1-1.5mm are opened on the reinforcing film 2, so as not to affect the air permeability of the protective film; under the action of the mesh PTFE fiber layer 4, it has excellent air permeability and at the same time improves the mechanical strength and impact strength of the protective film, and can also be used to support the surface film 5 and the reinforcing film 2; the surface film 5 made of LLDPE material has good waterproof and breathable effect, and good cold resistance and weather resistance, and also has better puncture resistance and strength, which further improves the strength and puncture resistance of the protective film, and greatly improves the protection effect on food.

[0021] The above is only a preferred embodiment of the utility model. Any person skilled in the art can modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A breathable and waterproof protective film, comprising a base film (1), characterized in that: A reinforcing membrane (2) is fixed on the outer surface of the base membrane (1), a plurality of air holes (3) are evenly arranged on the reinforcing membrane (2), a mesh PTFE fiber layer (4) is fixed on the outer surface of the reinforcing membrane (2), and a surface membrane (5) is fixed on the outer surface of the mesh PTFE fiber layer (4).

2. A breathable and waterproof protective film according to claim 1, characterized in that: The reinforcing film (2) is made of PET material, the thickness of the reinforcing film (2) is set to 4-10 μm, and the aperture of the air holes (3) is set to 1-1.5 mm.

3. A breathable and waterproof protective film according to claim 1, characterized in that: The surface film (5) is made of LLDPE material, and the thickness of the surface film (5) is set to 5-8 μm.

4. A breathable and waterproof protective film according to claim 1, characterized in that: The mesh PTFE fiber layer (4) is a mesh porous structure formed by PTFE fibers interwoven horizontally and vertically, and the thickness of the mesh PTFE fiber layer (4) is 6 to 8 μm.

5. The breathable and waterproof protective film according to claim 1, characterized in that: The base film (1) is made of polypropylene, and the thickness of the base film (1) is set to 8-15 μm.

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