Damp-proof breathable packaging structure

Abstract

The utility model relates to the field of packaging, in particular to a damp-proof breathable packaging structure. The damp-proof breathable packaging structure comprises a bottle cap and / or a bottle body and a breathable cover plate matched with the bottle cap and / or the bottle body, and a containing space is defined by the bottle cap and / or the bottle body and the breathable cover plate; a plurality of transparent cover vent holes are formed in the breathable cover plate; the breathable cover plate is fixed in the bottle cap or the bottle body in an ultrasonic welding mode. The strength and the stability of the moisture-proof part are enhanced, and the problems of deformation and drying agent leakage caused by extrusion or collision of external force are effectively prevented, so that the quality and the safety of packaged contents are ensured. And by optimizing the welding surface structure and reserving the gap, the ultrasonic welding quality is improved, and the reliability of the structure is further enhanced.

Description

Technical Field

[0001] The present application relates to the field of packaging, and in particular to a moisture-proof and breathable packaging structure. Background Art

[0002] In existing solid medicine, health care product and food packaging, in order to prevent the contents from deliquescence, fragmentation or agglomeration, desiccant is usually placed in the bottle cap or bottle body and separated by breathable cardboard. However, breathable cardboard has the problem of weak strength and is easily deformed when squeezed or collided, causing the desiccant to leak or break, thereby contaminating the contents of the package.

[0003] Current solutions mainly rely on breathable cardboard as an isolation material, but its strength is not enough to resist external pressure, which can easily cause desiccant leakage. In addition, the air permeability of the cardboard material is also limited, which may affect the drying effect.

[0004] Therefore, how to enhance the strength and stability of the moisture-proof part and prevent desiccant leakage has become a problem that needs to be solved urgently. Utility Model Content

[0005] In order to enhance the strength and stability of the moisture-proof part and prevent desiccant leakage, the present application provides a moisture-proof and breathable packaging structure.

[0006] The present application provides a moisture-proof and breathable packaging structure that adopts the following technical solutions:

[0007] A moisture-proof and breathable packaging structure,

[0008] It includes a bottle cap and / or a bottle body, and a breathable cover plate matched therewith, wherein a containing space is enclosed between the bottle cap and / or the bottle body and the breathable cover plate;

[0009] The breathable cover plate is provided with a plurality of cover-through vent holes;

[0010] The breathable cover plate is fixed inside the bottle cap or the bottle body by ultrasonic welding.

[0011] By adopting the above technical solution: placing materials such as a dryer in the accommodating space, the cover vent holes on the breathable cover of the moisture-proof and breathable packaging structure can effectively regulate the gas exchange between the inside and outside of the package, allowing water vapor to escape while preventing external moisture from entering, thereby preventing the contents from getting damp. Ultrasonic welding technology ensures a tight and stable seal between the breathable cover and the bottle cap or bottle body, further enhancing the moisture-proof ability of the package. By fixing the breathable cover inside the bottle cap or bottle body, the design takes into account the user's operational convenience, making it easier and faster to open and reclose the package, while ensuring that the contents of the package are protected from external contamination throughout the entire use cycle, thereby improving product safety and user satisfaction.

[0012] Optionally, a microstructure is constructed at the joint where the breathable cover plate is welded with the bottle cap and the bottle body, and the microstructure is a microgroove, a microhole, or a microconvex body.

[0013] By adopting the above technical solution: by setting microstructures such as microgrooves, micropores or microconvex bodies, the actual contact area of ​​the welding surface can be increased. Through the mechanical interlocking effect of these fine structures, the bonding strength and stability of the welding interface are significantly improved, and it is not easy to fall off or break even under external impact or long-term use, thereby ensuring the long-term sealing performance and moisture-proof effect of the packaging. The microstructure design helps to guide and control the flow of solder during the welding process, reduce the generation of welding defects such as bubbles and cracks, improve the flatness and uniformity of the welding surface, make the appearance of the entire packaging structure more refined, and improve the overall aesthetics and consumer acceptance of the product.

[0014] Optionally, the ventilated cover plate comprises a ventilated cover top wall and a ventilated cover side wall, the ventilated cover hole is at least provided on the ventilated cover top wall; the outer edge of the ventilated cover side wall is configured as a ventilated cover side wall tip;

[0015] A convex wall body is constructed on the bottle cap and the bottle body, the outer edge of the convex wall body is constructed to form a convex wall tip, a convex wall shoulder is constructed between the convex wall body and the convex wall tip, and the cover side wall tip of the breathable cover plate can abut against the convex wall shoulder;

[0016] The tip of the transparent cover side wall and the convex wall shoulder are fixed by ultrasonic welding.

[0017] By adopting the above technical solution: the tip of the transparent cover side wall of the breathable cover plate is fixed to the convex wall shoulder of the bottle cap or bottle body by ultrasonic welding, forming a stable three-point support structure. Such a design not only enhances the connection strength between the breathable cover plate and the container body, but also ensures the sealing integrity of the package, effectively preventing the intrusion of humid air and the leakage of desiccant. The precise docking of the tip of the transparent cover side wall and the convex wall shoulder and ultrasonic welding enable the stress of the entire packaging structure to be more evenly dispersed when subjected to external force impact, reducing local stress concentration and improving the impact resistance and durability of the packaging. Through the pre-designed geometric matching of the tip of the transparent cover side wall and the convex wall shoulder, the assembly steps are simplified, making the welding process more efficient and easy to automate, improving production efficiency and welding accuracy, and reducing the defective rate caused by human factors.

[0018] Optionally, the inner side of the tip of the transparent cover side wall is in a flared shape; the inner side of the tip of the convex wall is in a flared shape.

[0019] By adopting the above technical solution: the flared structure can disperse stress more evenly and reduce local stress concentration when subjected to external pressure, thereby improving the packaging's ability to resist impact and extrusion and extending the packaging's service life. During the injection molding process, the flared design helps the mold to be smoothly demolded, reducing the possibility of product deformation or damage. At the same time, during assembly, the flared structure can guide naturally, simplifying the operation process and improving production efficiency.

[0020] Optionally, the bottle cap includes a cap top wall, a cap outer peripheral wall, and a cap sealing skirt, and the bottle cap can be screwed onto the bottle body; the bottle cap also includes a cap inner peripheral wall; when the bottle cap is screwed onto the mouth of the bottle body, the cap inner peripheral wall and the cap outer peripheral wall are respectively on the inner and outer sides of the mouth of the bottle body.

[0021] By adopting the above technical solution: the sealing skirt of the cap body is tightly fitted with the mouth of the bottle body, especially when the inner peripheral wall and the outer peripheral wall of the cap body are in contact with the inner side and the outer side of the mouth of the bottle body respectively, a double sealing effect is formed, which effectively prevents water penetration and leakage of contents, and ensures the sealing and moisture-proof properties of the packaging. The bottle cap is designed to be fixed on the bottle body by screwing, which is not only convenient for users to open and close easily, improving the convenience of use, but also ensuring the reliability of the seal, and can maintain a good sealing state even after multiple openings and closings.

[0022] Optionally, a protective sleeve is arranged outside the breathable cover plate, and one end of the protective sleeve is fixed to the top wall of the cover body of the bottle cap.

[0023] By adopting the above technical solution: the addition of the sheath provides an extra physical protection barrier for the accommodating space, which can effectively prevent damage caused by collision and scratch during transportation, storage or use, and extend the service life of the packaging.

[0024] Optionally, at least the cover side wall of the breathable cover plate is configured as a double-layer or multi-layer structure, and a tiny gap is provided between each layer structure.

[0025] By adopting the above technical solutions: developing a double-layer or multi-layer expansion structure, using an inner and outer double-layer plastic cover structure, the inner cover is responsible for air permeability and moisture resistance, and the outer cover provides additional structural support. There is a small gap between each layer to form a buffer area to absorb external impact and protect the inner cover from being squeezed and deformed. And by forming an air interlayer, the thermal insulation performance is improved. The double-layer or multi-layer structure provides more possibilities for customized design, such as selecting different materials or functional materials as each layer according to specific needs to adapt to a wider range of packaging application needs.

[0026] Optionally, a plurality of reinforcing ribs are provided on the outer surface or inner surface of the convex wall body and / or the breathable cover plate.

[0027] By adopting the above technical solution: the addition of reinforcing ribs significantly improves the bending and torsional strength of the breathable cover and the convex wall body, and can effectively prevent the distortion or rupture of the structure even when facing large external forces, ensuring the stability of the packaging and the safety of the contents. The design of the reinforcing ribs has been precisely calculated to achieve the maximum structural reinforcement effect with the least amount of material added, avoiding unnecessary weight gain, which is especially important for the pursuit of lightweight packaging design, while maintaining unaffected breathability. The reinforcing rib design is closely integrated with the mold manufacturing process and can be completed in the molding process such as injection molding or blow molding, without the need for additional processing steps, which simplifies the production process and reduces manufacturing costs.

[0028] Optionally, the width of the welding surface between the tip of the transparent cover side wall and the convex wall shoulder is 0.2-0.5 mm;

[0029] The diameter of the air holes on the air permeable cover plate is 0.1-0.5 mm.

[0030] By adopting the above technical solution: controlling the welding surface width within a narrow range of 0.2-0.5mm, it is possible to ensure that the energy is concentrated during ultrasonic welding, which not only improves the accuracy and efficiency of welding, but also reduces the heat-affected area, avoids deformation or damage of the material caused by excessive heating, and thus ensures the strength and sealing of the welding part. The aperture of the air hole is set at 0.1-0.5mm. This size range can effectively promote the gas exchange between the inside and outside of the package, quickly discharge moisture, and prevent internal moisture. At the same time, it can effectively prevent fine particles (such as desiccant) in the package from leaking through the air hole, achieving the best balance between air permeability and leak-proofness, and is particularly suitable for packaging applications with strict requirements for air permeability control.

[0031] Optionally, the bottle cap, bottle body and breathable cover plate are made of thermoplastic resin by injection molding process; the bottle cap, bottle body and breathable cover plate are made of PP, PE, PET / PS / PC blended material and nano-reinforced plastic;

[0032] The air holes of the breathable cover are coated with a hydrophobic coating.

[0033] By adopting the above technical solution: the production of bottle caps, bottle bodies, and breathable covers by injection molding can achieve high automation and mass production, greatly improving production efficiency. At the same time, thermoplastic resins such as PP, PE, and PET / PS / PC blends are easy to process and relatively low in cost, which is conducive to reducing overall production costs. Using nano-reinforced plastics as a material option significantly improves the strength, wear resistance, and anti-aging properties of the breathable cover, ensuring the stability and reliability of the packaging structure in long-term use. Adding antibacterial or antistatic functional materials to the material effectively inhibits bacterial growth and reduces static electricity accumulation. This is a critical safety enhancement measure for packaging applications such as food and medicine that require strict hygiene conditions. The hydrophobic coating applied to the air holes of the breathable cover can not only effectively prevent blockage caused by condensation of water vapor at the air holes, keep the air holes unobstructed, and improve the gas exchange efficiency between the inside and outside of the package, but also help reduce dirt adhesion, improve self-cleaning ability, extend the service life of the package, and reduce maintenance requirements.

[0034] The present application includes at least one of the following beneficial technical effects:

[0035] This application enhances the strength and stability of the moisture-proof part, effectively preventing deformation and desiccant leakage caused by external force extrusion or collision, thereby ensuring the quality and safety of the package contents. By optimizing the welding surface structure and reserving gaps, the quality of ultrasonic welding is improved, and the reliability of the structure is further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of an embodiment of the present application in which the moisture-proof and breathable packaging structure is arranged on a bottle cap in an assembled state.

[0037] Figure 2 yes Figure 1 Schematic diagram of the structure from another perspective.

[0038] Figure 3 It is a schematic structural diagram of an embodiment of a breathable cover plate in the present application.

[0039] Figure 4 yes Figure 1 Schematic diagram of the front structure, including the breathable cover.

[0040] Figure 5 yes Figure 1 Schematic diagram of the left-side structure, which does not include the breathable cover.

[0041] Figure 6 yes Figure 5 Schematic diagram of the CC cross-section structure.

[0042] Figure 7 yes Figure 6 Schematic diagram of the partially enlarged structure of D in the middle.

[0043] Figure 8 yes Figure 4 Schematic diagram of the AA cross-sectional structure.

[0044] Fig. 9 yes Figure 8 Schematic diagram of the locally enlarged structure of E.

[0045] Description of reference numerals:

[0046] 1. Bottle cap; 11. Top wall of the cap body; 12. Outer peripheral wall of the cap body; 13. Sealing skirt of the cap body; 14. Inner peripheral wall of the cap body; 15. Convex wall body; 151. Convex wall tip; 152. Convex wall shoulder; 16. Accommodating space;

[0047] 2. Breathable cover plate; 21. Permeable cover top wall; 22. Permeable cover side wall; 23. Permeable cover vent; 24. Permeable cover side wall tip;

[0048] 3. Sheath. DETAILED DESCRIPTION

[0049] The following is combined with Figure 1-9 This application is described in further detail.

[0050] The present application aims at the problem of desiccant leakage and contamination caused by the weak strength and easy deformation of the breathable paperboard in the prior art, and the embodiment of the present application discloses a moisture-proof breathable packaging structure. It includes a bottle cap 1 and / or a bottle body, and a breathable cover plate 2 matched therewith, and a containing space 16 is formed between the bottle cap 1 and / or the bottle body and the breathable cover plate 2; a plurality of cover-through vents 23 are opened on the breathable cover plate 2; after placing the dryer and other materials in the containing space 16, the breathable cover plate 2 is fixed to the bottle cap 1 or the bottle body by ultrasonic welding.

[0051] In some embodiments of the present invention, Figure 1-2 As shown, the moisture-proof and breathable packaging structure includes a bottle cap 1 and a breathable cover plate 2.

[0052] like Figure 3 As shown, the breathable cover plate 2 includes a transparent cover top wall 21 and a transparent cover side wall 22. The transparent cover vent 23 is provided on the transparent cover top wall 21, and the outer edge of the transparent cover side wall 22 is configured as a transparent cover side wall tip 24. Figure 4-9As shown, a convex wall body 15 is constructed on the bottle cap 1 and the bottle body, and the outer edge of the convex wall body 15 is constructed to form a convex wall tip 151, and a convex wall shoulder 152 is constructed between the convex wall body 15 and the convex wall tip 151, and the transparent cover side wall tip 24 of the breathable cover plate 2 can abut against the convex wall shoulder 152. The transparent cover side wall tip 24 and the convex wall shoulder 152 are fixed by ultrasonic welding. Thus, an accommodating space 16 is formed between the bottle cap 1 and the breathable cover plate 2, and the breathable cover plate 2 is fixed to the bottle cap 1 or the bottle body by ultrasonic welding. In addition, in order to facilitate production, installation, welding, and have good force, the inner side of the transparent cover side wall tip 24 is flared, and the inner side of the convex wall tip 151 is flared. For example, according to tests in a certain implementation project, the welding surface width of the transparent cover side wall tip 24 and the convex wall shoulder 152 is 0.2-0.5mm; the aperture of the air permeable hole on the air permeable cover plate 2 is 0.1-0.5mm, which has a better effect.

[0053] In some embodiments of the present application, the bottle cap 1 includes a cap top wall 11, a cap outer peripheral wall 12, and a cap sealing skirt 13. The bottle cap 1 can be screwed onto the bottle body. The bottle cap 1 also includes a cap inner peripheral wall 14. When the bottle cap 1 is screwed onto the mouth of the bottle body, the cap inner peripheral wall 14 and the cap outer peripheral wall 12 are respectively located on the inner and outer sides of the mouth of the bottle body. A sheath 3 is provided on the outside of the breathable cover plate 2 and the bottle cap 1. Of course, the bottle cap can also be in any other form, as long as it has the above-mentioned breathable cover plate 2 and the accommodating space 16 formed by the breathable cover plate 2.

[0054] In some embodiments of the present application, a microstructure is constructed at the joint where the breathable cover plate 2 is welded with the bottle cap 1 and the bottle body, and the microstructure is a microgroove, a microhole, or a microconvex body. The transparent cover side wall tip 24 can be regarded as a microstructure. Of course, a microstructure can also be set on the surface of the transparent cover side wall tip 24, or on the surface of the convex wall shoulder 152.

[0055] In some embodiments of the present application, the moisture-proof and breathable packaging structure includes a bottle body and a breathable cover plate 2. The breathable cover plate 2 is arranged on the side wall near the bottom of the bottle body, and a convex wall body 15 is arranged on the side wall of the bottle body. The bottom surface of the bottle body, the lower part of the side wall and the breathable cover plate 2 are jointly enclosed to form an accommodating space.

[0056] In some embodiments of the present application, the moisture-proof and breathable packaging structure includes a bottle body and a breathable cover plate 2. The breathable cover plate 2 is arranged on the bottom surface of the bottle body, and a convex wall body 15 is arranged on the bottom surface of the bottle body. The bottom surface of the bottle body and the breathable cover plate 2 are jointly surrounded to form an accommodating space.

[0057] As an optimization, in some embodiments of the present application, at least the cover side wall 22 of the breathable cover plate 2 is set as a double-layer or multi-layer structure, and a small gap is set between each layer structure. A double-layer or multi-layer expansion structure is developed, and an inner and outer double-layer plastic cover plate structure is adopted. The inner cover plate is responsible for air permeability and moisture-proof, and the outer cover plate provides additional structural support. A small gap is set between each layer to form a buffer area to absorb external impact and protect the inner cover plate from being squeezed and deformed. And by forming an air interlayer, the thermal insulation performance is improved.

[0058] As an optimization, in some embodiments of the present application, a plurality of reinforcing ribs are provided on the outer surface or inner surface of the convex wall body 15 and the breathable cover plate 2. These reinforcing ribs can enhance the overall structural strength of the cover plate without affecting the breathability. The shape and layout of the reinforcing ribs are carefully calculated to ensure the maximum reinforcement effect with the minimum weight increase.

[0059] In some embodiments of the present application, the bottle cap 1, the bottle body, and the breathable cover plate 2 are made of thermoplastic resin by injection molding; the bottle cap 1, the bottle body, and the breathable cover plate 2 are made of PP, PE, PET / PS / PC blended materials, or nano-enhanced plastics; and antibacterial or antistatic functional materials may be added to enhance the use effect. The air holes of the breathable cover plate 2 are coated with a hydrophobic coating to enhance the anti-clogging and self-cleaning capabilities.

[0060] The embodiments of the present application adopt an ultrasonic welding process, using high-frequency, low-amplitude ultrasonic welding technology to ensure that the welding is firm and causes little damage to the material. The width of the welding surface between the cover plate and the drying chamber is accurately controlled within the range of 0.2-0.5mm, which not only ensures the welding strength but also avoids material waste. The lower side walls on both sides of the welding surface are designed to be beveled to form a small gap with the drying chamber, which effectively accommodates the overflow generated during the welding process and improves the welding yield. Ultrasonic welding is not only a non-contact welding method, it uses high-frequency vibration to generate friction heat fusion between material molecules. Compared with traditional welding methods, it can distribute heat more evenly and reduce material damage and deformation, thereby improving the structural stability of the interface between the breathable cover plate 2 and the container and the durability of the overall packaging.

[0061] The embodiments of the present application use high-strength, chemically resistant plastic materials. For example, the bottle cap 1, bottle body, and breathable cover plate 2 are made of thermoplastic resin using an injection molding process; the bottle cap 1, bottle body, and breathable cover plate 2 are all made of PP, PE, or one of PET / PS / PC blends to ensure the service life and safety of the breathable cover plate 2. The breathable cover plate 2 material can also be made of new composite materials, such as nano-reinforced plastics, to improve the strength, wear resistance, and anti-aging properties of the cover plate. Antibacterial or antistatic functional materials are also introduced into the material to meet the hygiene and safety requirements of specific industries.

[0062] In the embodiment of the present application, the breathable cover plate 2 is formed by a precision injection molding process, and the inner wall of the breathable cover plate 2 adopts a gradual expansion design, which is convenient for demolding during injection molding and reduces production costs. The expansion angle is optimized and calculated to ensure that the air permeability is not affected while the anti-deformation ability is enhanced. In addition, the improved welding surface and expansion design reduce the production difficulty, reduce the defective product rate, and save costs.

[0063] In the embodiment of the present application, the air holes on the breathable cover plate 2 are punched with laser technology, and the aperture is precisely controlled within the range of 0.1-0.5mm, ensuring air permeability while preventing desiccant leakage. The shape of the breathable cover plate 2 can be designed in various shapes, such as round, square, oval, etc., to meet the needs of bottle caps 1 or bottle bodies of different shapes and sizes. Each shape has been subjected to structural strength analysis and simulation to ensure good structural stability while maintaining air permeability. The layout of the air holes has been optimized to ensure uniform distribution to achieve efficient moisture exchange and enhance the moisture-proof effect of the packaging. In addition, the shape of the breathable cover plate 2 also adopts a bionic design to imitate the efficient and breathable structure in nature, such as the arrangement of stomata on leaves.

[0064] In the embodiments of the present application, various types of desiccants are provided for users to choose from, including silica gel, molecular sieves and mixtures thereof, and other high-efficiency granular deoxidizers or activated carbon. Each desiccant is strictly screened and tested to ensure that its hygroscopic performance, stability and compatibility with packaging materials meet the use requirements. A variety of desiccant options meet users' different moisture-proof needs and improve product use flexibility and satisfaction.

[0065] In the embodiment of the present application, the breathable cover plate 2 can be designed as a replaceable modular component, so as to customize different breathable and moisture-proof solutions according to the characteristics of different products. At the same time, the modular design also simplifies the production process and reduces the maintenance and replacement costs.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A moisture-proof and breathable packaging structure, characterized in that: It comprises a bottle cap (1) and / or a bottle body, and a breathable cover plate (2) matched therewith, wherein a containing space (16) is formed between the bottle cap (1) and / or the bottle body and the breathable cover plate (2); The breathable cover plate (2) is provided with a plurality of cover-through vent holes (23); The breathable cover plate (2) is fixed inside the bottle cap (1) or the bottle body by ultrasonic welding.

2. The moisture-proof and breathable packaging structure according to claim 1, characterized in that: A microstructure is constructed at the joint where the breathable cover plate (2) is welded to the bottle cap (1) and the bottle body, and the microstructure is a microgroove, a microhole, and a microconvex body.

3. The moisture-proof and breathable packaging structure according to claim 1 or 2, characterized in that: The ventilated cover plate (2) comprises a ventilated cover top wall (21) and a ventilated cover side wall (22); the ventilated cover hole (23) is at least provided on the ventilated cover top wall (21); the outer edge of the ventilated cover side wall (22) is configured as a ventilated cover side wall tip (24); A convex wall body (15) is constructed on the bottle cap (1) and the bottle body, the outer edge of the convex wall body (15) is constructed to form a convex wall tip (151), a convex wall shoulder (152) is constructed between the convex wall body (15) and the convex wall tip (151), and the cover side wall tip (24) of the breathable cover plate (2) can abut against the convex wall shoulder (152); The transparent cover side wall tip (24) and the convex wall shoulder (152) are fixed by ultrasonic welding.

4. The moisture-proof and breathable packaging structure according to claim 3, characterized in that: The inner side of the tip (24) of the transparent cover side wall is in a flared shape; The inner side of the convex wall tip (151) is in a flared shape.

5. The moisture-proof and breathable packaging structure according to claim 3, characterized in that: The bottle cap (1) comprises a cap body top wall (11), a cap body outer peripheral wall (12), and a cap body sealing skirt (13); the bottle cap (1) can be screwed onto the bottle body; The bottle cap (1) further comprises an inner peripheral wall (14) of the cap body; when the bottle cap (1) is screwed onto the mouth of the bottle body, the inner peripheral wall (14) of the cap body and the outer peripheral wall (12) of the cap body are respectively located on the inner side and the outer side of the mouth of the bottle body.

6. The moisture-proof and breathable packaging structure according to claim 5, characterized in that: A protective sleeve (3) is arranged outside the breathable cover plate (2), and one end of the protective sleeve (3) is fixed to the top wall (11) of the cover body of the bottle cap (1).

7. The moisture-proof and breathable packaging structure according to claim 3, characterized in that: At least the cover side wall (22) of the breathable cover plate (2) is configured as a double-layer or multi-layer structure, with tiny gaps being provided between the layers.

8. The moisture-proof and breathable packaging structure according to claim 3, characterized in that: A plurality of reinforcing ribs are provided on the outer surface or the inner surface of the convex wall body (15) and / or the breathable cover plate (2).

9. The moisture-proof and breathable packaging structure according to claim 3, characterized in that: The width of the welding surface between the tip of the transparent cover side wall (24) and the convex wall shoulder (152) is 0.2-0.5 mm; The diameter of the air holes on the air permeable cover plate (2) is 0.1-0.5 mm.

10. The moisture-proof and breathable packaging structure according to claim 3, characterized in that: The bottle cap (1), bottle body and breathable cover plate (2) are made of thermoplastic resin using an injection molding process; the bottle cap (1), bottle body and breathable cover plate (2) are all made of one of PP, PE, PET / PS / PC blended materials and nano-reinforced plastics; The air holes of the air permeable cover plate (2) are coated with a hydrophobic coating.

Images