A leak-proof packaging paper

Abstract

This utility model discloses a leak-proof packaging paper, comprising: a packaging paper body, the packaging paper body including a protective layer and a breathable layer; the protective layer including a first protective layer and a second protective layer, and the breathable layer disposed between the first protective layer and the second protective layer. In this utility model, the outer first protective layer can effectively increase the strength of the packaging paper and serve as a printing layer for printing product information; the middle breathable layer can effectively prevent liquid leakage and block dust leakage; and the inner second protective layer can further increase the strength of the packaging paper and serve as a heat-sealing protection for internal moisture-regulating materials, or achieve a double leak-proof effect.

Description

Technical Field

[0001] This utility model relates to the field of packaging paper technology, specifically to a leak-proof packaging paper. Background Technology

[0002] Packaging paper used for dehumidifier bags, dehumidifier boxes, desiccants, and humidity-regulating products needs to have good moisture resistance, breathability, and structural strength to ensure that the internal moisture-absorbing materials function effectively and do not leak.

[0003] Current packaging paper materials are mostly non-woven fabric and polyethylene breathable film, which serve both dustproof and moisture-proof functions, allowing moisture to pass through and be absorbed by the internal materials while preventing powder or particles from leaking out. However, once the moisture-regulating materials inside the packaging paper have fully absorbed moisture, the non-woven fabric and polyethylene breathable film become less effective at preventing liquid leakage and cannot form an effective barrier. Liquid can easily seep out through the gaps, greatly affecting product quality and user experience. Utility Model Content

[0004] The purpose of this utility model is to provide a leak-proof packaging paper to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including: a packaging paper body, wherein the packaging paper body includes a protective layer and a breathable layer;

[0006] The protective layer includes a first protective layer and a second protective layer, and the breathable layer is disposed between the first protective layer and the second protective layer.

[0007] As a further description of the above technical solution, the material of the first protective layer is non-woven fabric.

[0008] As a further description of the above technical solution, the first protective layer is 50-150μm.

[0009] As a further description of the above technical solution, the material of the second protective layer is non-woven fabric, polyethylene breathable membrane, or polyethylene perforated membrane.

[0010] As a further description of the above technical solution, the second protective layer is 50-150μm.

[0011] As a further description of the above technical solution, the breathable layer is made of polypropylene film.

[0012] As a further description of the above technical solution, the thickness of the breathable layer is 30-80μm.

[0013] As a further description of the above technical solution, the protective layer and the breathable layer are bonded together by an adhesive layer, which includes a first adhesive layer and a second adhesive layer.

[0014] As a further description of the above technical solution, the material of the first adhesive layer is hot melt adhesive or water-based adhesive, and the thickness of the first adhesive layer is 10-30μm.

[0015] As a further description of the above technical solution, the material of the second adhesive layer is hot melt adhesive or water-based adhesive, and the thickness of the second adhesive layer is 10-30μm.

[0016] The beneficial effects of this utility model are as follows:

[0017] In this invention, the outer first protective layer can effectively increase the strength of the packaging paper and serve as a printing layer for printing product information; the middle breathable layer can effectively prevent liquid leakage and block dust leakage; and the inner second protective layer can further increase the strength of the packaging paper and serve as a heat-sealing protection for the internal moisture-regulating materials, or achieve a double leak-proof effect.

[0018] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the leak-proof packaging paper of this utility model.

[0020] Figure label:

[0021] 1. Protective layer; 11. First protective layer; 12. Second protective layer; 2. Breathable layer; 3. Adhesive layer; 31. First adhesive layer; 32. Second adhesive layer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, in one embodiment, a leak-proof packaging paper includes: a packaging paper body; wherein the packaging paper body includes a protective layer 1 and a breathable layer 2;

[0024] Furthermore, the protective layer 1 includes a first protective layer 11 and a second protective layer 12. The double protection can significantly enhance the overall performance of the packaging paper. The breathable layer 2 is disposed between the first protective layer 11 and the second protective layer 12 to maintain the breathability of the packaging paper.

[0025] For example, the first protective layer 11 is made of non-woven fabric, including polyester fiber (PET) non-woven fabric, polypropylene fiber (PP) non-woven fabric, and ET non-woven fabric, which can be flexibly selected according to the application scenario: polyester fiber non-woven fabric has the characteristics of high strength, wear resistance and excellent chemical stability, which can effectively resist external friction and chemical corrosion; polypropylene fiber non-woven fabric has the characteristics of light weight, flexibility and water resistance, which can be used in high humidity environment; while the hybrid non-woven fabric combines the dual advantages of PET and PP, which not only has higher tensile strength and folding resistance, but also can adapt to complex use environment; and in addition to providing physical protection, the first protective layer 11 can also be used as a printing layer due to its flat surface and good adsorption. Through gravure printing, flexographic printing and other processes, product name, instructions for use, brand logo and other information can be clearly printed to improve the product's recognizability and aesthetics.

[0026] Correspondingly, the material of the second protective layer 12 can be consistent with that of the first protective layer 11, further enhancing the overall strength and protective performance of the packaging paper. At the same time, it can be tightly bonded to other parts of the packaging paper using a heat-sealing process to form a closed space. Alternatively, it can be a polyethylene (PP) breathable film or a polyethylene (PP) perforated film, which can be flexibly selected according to the application scenario: the polyethylene breathable film forms a micron-level microporous structure through a special process, which effectively blocks liquid water leakage while ensuring the permeability of moisture; the polyethylene perforated film forms breathable channels through mechanical or laser perforation, which achieves rapid air permeability and forms a double leak-proof mechanism with the outer protective structure, further reducing the risk of liquid leakage and providing a safer storage environment for the internal materials.

[0027] Specifically, the first protective layer 11 is 50-150μm thick, and the second protective layer 12 is 50-150μm thick.

[0028] For example, the breathable layer 2 is made of polypropylene membrane, using homopolymer polypropylene or copolymer polypropylene as raw material, and manufactured through biaxial stretching or microporous foaming process to form a uniformly distributed micron-scale microporous structure. The polypropylene membrane of the breathable layer 2 is tightly bonded to the protective layers 1 on both sides to form a multi-layer protective system: when the internal moisture-regulating material absorbs water vapor and turns into a liquid state, the microporous structure of the polypropylene membrane can prevent liquid penetration, and together with the physical barrier of the outer protective layer 1, double leakage prevention is achieved; for fine particles such as dust, the pore size limitation and surface smoothness of the membrane layer can effectively prevent dust leakage.

[0029] Specifically, the thickness of the breathable layer 2 is 30-80μm.

[0030] Please continue reading. Figure 1 In this embodiment, the protective layer 1 and the breathable layer 2 are bonded together by an adhesive layer 3, which includes a first adhesive layer 31 and a second adhesive layer 32.

[0031] For example, the materials of the first adhesive layer 31 and the second adhesive layer 32 are hot melt adhesive or water-based adhesive, which can be flexibly selected according to the application scenario: hot melt adhesive uses ethylene-vinyl acetate copolymer as the base material, and achieves rapid leveling and wetting within a preset temperature range through a heating and melting coating process, and forms an elastic adhesive film layer after cooling; water-based adhesive uses acrylic emulsion as the main body, and forms a film by water evaporation. Its advantage is that it is environmentally friendly and non-toxic, and meets the safety standards for food contact materials.

[0032] Specifically, the thickness of the first adhesive layer 31 is 10-30 μm, and the thickness of the second adhesive layer 32 is 10-30 μm.

[0033] The above technical solution is applicable to the packaging of dehumidifying bags, dehumidifying boxes, desiccants and humidity-regulating products, which can reduce the risk of liquid leakage of internal products and effectively improve product performance and stability.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leakproof wrapping paper, characterized by, include: The packaging paper body includes a protective layer (1) and a breathable layer (2); The protective layer (1) includes a first protective layer (11) and a second protective layer (12), and the breathable layer (2) is disposed between the first protective layer (11) and the second protective layer (12).

2. The barrier wrapping paper according to claim 1, wherein, The first protective layer (11) is made of non-woven fabric.

3. The barrier wrapping paper according to claim 2, wherein, The first protective layer (11) is 50-150 μm thick.

4. The barrier wrapping paper according to claim 1, wherein The material of the second protective layer (12) is non-woven fabric, polyethylene breathable membrane or polyethylene perforated membrane.

5. The barrier wrapping paper according to claim 4, wherein, The second protective layer (12) is 50-150 μm thick.

6. The barrier wrapping paper according to claim 1, wherein, The breathable layer (2) is made of polypropylene film.

7. The barrier wrapping paper according to claim 6, wherein, The thickness of the breathable layer (2) is 30-80 μm.

8. The barrier wrapping paper according to claim 1, wherein, The protective layer (1) and the breathable layer (2) are bonded together by an adhesive layer (3), which includes a first adhesive layer (31) and a second adhesive layer (32).

9. The barrier wrapping paper according to claim 8, wherein, The first adhesive layer (31) is made of hot melt adhesive or water-based adhesive, and the thickness of the first adhesive layer (31) is 10-30μm.

10. The barrier wrapping paper according to claim 8, wherein, The material of the second adhesive layer (32) is hot melt adhesive or water-based adhesive, and the thickness of the second adhesive layer (32) is 10-30μm.

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