Double sealed light proof aluminum foil bag

Abstract

This utility model relates to the field of aluminum foil bag technology and discloses a double-layer sealed light-proof aluminum foil bag, including an outer aluminum foil bag body and an inner aluminum foil bag body. The outer aluminum foil bag body covers the outside of the inner aluminum foil bag body, and both have outer heat-sealed edges and inner heat-sealed edges, forming a double-sealed structure. A first light-proof layer and a second light-proof layer are provided between the outer and inner aluminum foil bag bodies. Both light-proof layers are made of black PET coated film to enhance light-blocking performance. The bag body has a double zipper closure at the top to allow for repeated opening and closing, improving sealing performance. In this utility model, the double-layer aluminum foil bag structure, combined with double heat-sealed edges and a double zipper closure, effectively improves the sealing performance and reusability of the packaging bag, preventing the penetration of gas, moisture, and odors. At the same time, the multi-layer light-proof coating in the bag body interlayer can significantly enhance the shielding effect against ultraviolet and visible light.

Description

Technical Field

[0001] This utility model relates to the field of aluminum foil bag technology, and in particular to a double-layer sealed light-proof aluminum foil bag. Background Technology

[0002] With the increasing demands for airtightness and light-blocking properties in the storage and transportation of photosensitive substances such as food, pharmaceuticals, and seeds, aluminum foil composite materials have been widely used in the flexible packaging industry due to their excellent barrier properties and mechanical strength. Aluminum foil bags, as a typical form of high-barrier packaging, are often used for products requiring protection from light, moisture, and oxidation. To further improve packaging safety and reusability, the industry continues to improve and optimize packaging bag structures and sealing methods.

[0003] In existing technologies, common aluminum foil packaging bags typically employ a single-layer aluminum-plastic composite film structure, formed by heat sealing and equipped with a single zipper closure to achieve basic sealing functionality. These structures mostly achieve bag closure through heat sealing of the boundaries, and some bags have a single light-blocking layer on the inner wall to reduce ultraviolet transmittance, providing a certain degree of moisture protection and light shielding in practical use. Some improved solutions incorporate functional modules such as easy-tear openings and air valves to meet convenience needs in specific scenarios.

[0004] However, most existing aluminum foil bags still suffer from insufficient sealing performance in their sealing structure design. Especially after repeated opening and closing, the seal is prone to loosening, gas leakage, and moisture ingress, affecting the quality of the contents. Furthermore, their ability to block visible light and ultraviolet radiation is limited, making it difficult to meet the requirements for long-term high-light-shielding storage of photosensitive substances. Therefore, there is an urgent need for a new aluminum foil bag structure with significant improvements in sealing, light-shielding, and reusability to enhance packaging effectiveness and application reliability. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a double-layer sealed light-proof aluminum foil bag, which aims to improve the problem that after repeated opening and closing, the seal may loosen, gas may seep in, and moisture may enter, affecting the quality of the contents.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a double-layer sealed light-proof aluminum foil bag, comprising: an outer aluminum foil bag body and an inner aluminum foil bag body, wherein the outer aluminum foil bag body covers the outside of the inner aluminum foil bag body, and both are respectively provided with an outer heat-sealing edge and an inner heat-sealing edge, forming a double-sealed structure.

[0007] As a further description of the above technical solution:

[0008] A first light-blocking layer and a second light-blocking layer are provided between the outer aluminum foil bag and the inner aluminum foil bag. Both light-blocking layers are made of black PET coated film to enhance the light-blocking performance.

[0009] As a further description of the above technical solution:

[0010] The bag has a double zipper closure at the top, which allows for repeated opening and closing, improving sealing performance.

[0011] As a further description of the above technical solution:

[0012] The double zipper seal and the inner heat-sealed edge form a sealed compartment to further improve storage airtightness.

[0013] As a further description of the above technical solution:

[0014] The inner aluminum foil bag has an easy-tear opening structure to facilitate users in opening the bag.

[0015] As a further description of the above technical solution:

[0016] The inner aluminum foil bag has positioning lines along its width to assist in folding and pressing.

[0017] As a further description of the above technical solution:

[0018] An interlayer venting groove is provided between the inner aluminum foil bag and the outer aluminum foil bag to release excess gas during the heat sealing process and prevent bulging.

[0019] As a further description of the above technical solution:

[0020] The outer and inner aluminum foil bags are made of moisture-proof and UV-proof materials, providing high barrier properties.

[0021] This utility model has the following beneficial effects:

[0022] This invention employs a double-layer aluminum foil bag structure, combined with double heat-sealing edges and a double-zipper closure, effectively improving the sealing performance and reusability of the packaging bag, preventing the penetration of gas, moisture, and odors. Simultaneously, the multi-layer light-blocking coating within the bag's interlayer significantly enhances the shielding effect against ultraviolet and visible light, making it suitable for high-light-shielding storage of photosensitive substances, possessing excellent protective performance and practical value. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of the double-layer sealed light-proof aluminum foil bag proposed in this utility model;

[0025] Figure 2 This is a plan view of the outer aluminum foil bag of the double-layer sealed light-proof aluminum foil bag proposed in this utility model;

[0026] Figure 3 This is a plan view of the inner aluminum foil bag of the double-layer sealed light-proof aluminum foil bag proposed in this utility model.

[0027] Legend:

[0028] 1. Outer aluminum foil bag body; 2. Inner aluminum foil bag body; 3. Outer heat-sealed edge; 4. Inner heat-sealed edge; 5. First light-proof layer; 6. Second light-proof layer; 7. Double zipper seal; 8. Easy-tear opening structure; 9. Positioning seam; 10. Interlayer ventilation channel. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0033] Reference Figures 1-3This utility model provides an embodiment of a double-layer sealed light-proof aluminum foil bag, comprising: an outer aluminum foil bag body 1 and an inner aluminum foil bag body 2. The outer aluminum foil bag body 1 covers the outside of the inner aluminum foil bag body 2, providing a first layer of mechanical protection and primary shielding effect, enhancing overall tear resistance and pressure resistance. Both are respectively provided with an outer heat-sealing edge 3 and an inner heat-sealing edge 4. The outer heat-sealing edge 3 and the inner heat-sealing edge 4 seal the opening ends of the outer aluminum foil bag body 1 and the inner aluminum foil bag body 2 respectively by heat sealing, forming a double-sealed structure, thereby significantly improving light protection. The packaging bag boasts superior sealing performance and durability. A first light-blocking layer 5 and a second light-blocking layer 6 are positioned between the outer aluminum foil bag body 1 and the inner aluminum foil bag body 2. Both light-blocking layers are made of black PET coated film to enhance light-blocking performance, effectively blocking ultraviolet and visible light to prevent the contents from deteriorating due to light exposure. A double-zipper closure 7 is located at the top of the bag, allowing for repeated opening and closing to improve sealing performance. The double-zipper structure provides two layers of protection in a single opening and closing, enhancing the airtightness after opening and closing, making it suitable for applications requiring multiple openings and closings. Storage scenario: A sealed compartment is formed between the double zipper seal 7 and the inner heat-sealed edge 4. This compartment forms an independent space when closed, further preventing external gas or moisture from entering through the zipper gaps, thus improving storage airtightness. The inner aluminum foil bag 2 has an easy-tear structure 8 to facilitate user opening of the bag without the need for scissors or other auxiliary tools, improving the user experience. Positioning lines 9 are set along the width of the bag on the inner aluminum foil bag 2 to assist in folding and pressing, making it easy to keep the bag intact during use or transportation. The packaging design enhances overall integrity and shaping effect. An interlayer venting groove 10 is provided between the inner aluminum foil bag 2 and the outer aluminum foil bag 1 to expel excess gas during heat sealing, preventing bulging and maintaining a smooth sealing surface. This improves heat sealing quality and reliability. The outer aluminum foil bag 1 and inner aluminum foil bag 2 are made of moisture-proof and UV-resistant materials, providing high barrier properties and effectively preventing external factors such as oxygen and water vapor from affecting the contents. This design is suitable for product packaging requirements with high light-proof and freshness-preserving properties.

[0034] Working Principle: When using this double-layer sealed light-proof aluminum foil bag, the nested arrangement of the outer aluminum foil bag body 1 and the inner aluminum foil bag body 2 forms a double-layer structure. The outer heat-sealing edge 3 and the inner heat-sealing edge 4 are respectively set at the edges of the two bag bodies, forming a double barrier channel through heat sealing, significantly enhancing the sealing performance. A first light-proof layer 5 and a second light-proof layer 6 are provided between the outer aluminum foil bag body 1 and the inner aluminum foil bag body 2. These two light-proof layers are black coated films or high-barrier metal film structures, which can effectively block ultraviolet rays and strong light, preventing the contents from decomposing or deteriorating due to light exposure. The double zipper seal 7 at the bag opening has a repeated opening and closing function, and simultaneously forms an independent sealed chamber with the inner heat-sealing edge 4, improving airtightness. The top of the inner aluminum foil bag body 2 has an easy-tear structure 8 for easy opening by the user; the outer wall of the bag is provided with positioning lines 9 for neat folding and guiding alignment. An interlayer venting channel 10 is provided between the outer and inner layers to expel residual gas during the heat-sealing process, preventing bulging. The synergistic effect of these structures achieves light-proof, moisture-proof, oxygen-barrier, and high-sealing performance, making it suitable for packaging and storing photosensitive or high-preservation-requirement products.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-layer sealed light-proof aluminum foil bag, characterized in that, include: The outer aluminum foil bag (1) and the inner aluminum foil bag (2) are provided with an outer heat-sealing edge (3) and an inner heat-sealing edge (4) respectively, forming a double sealing structure.

2. The double-layer sealed light-proof aluminum foil bag according to claim 1, characterized in that: A first light-shielding layer (5) and a second light-shielding layer (6) are provided between the outer aluminum foil bag body (1) and the inner aluminum foil bag body (2). Both light-shielding layers are made of black PET coated film to enhance the light-shielding performance.

3. The double-layer sealed light-proof aluminum foil bag according to claim 1, characterized in that: The bag is equipped with a double zipper closure (7) at the top, which allows for repeated opening and closing to improve sealing performance.

4. The double-layer sealed light-proof aluminum foil bag according to claim 3, characterized in that: The double zipper seal (7) and the inner heat-sealed edge (4) form a sealed compartment to further improve storage airtightness.

5. The double-layer sealed light-proof aluminum foil bag according to claim 1, characterized in that: The inner aluminum foil bag (2) is provided with an easy-tear structure (8) to facilitate the user to open the bag.

6. The double-layer sealed light-proof aluminum foil bag according to claim 1, characterized in that: The inner aluminum foil bag (2) has positioning lines (9) along the width direction of the bag to assist in folding and pressing.

7. The double-layer sealed light-proof aluminum foil bag according to claim 1, characterized in that: An interlayer venting groove (10) is provided between the inner aluminum foil bag body (2) and the outer aluminum foil bag body (1) to discharge excess gas during the heat sealing process and prevent bulging.

8. The double-layer sealed light-proof aluminum foil bag according to claim 1, characterized in that: The outer aluminum foil bag (1) and the inner aluminum foil bag (2) are made of moisture-proof and UV-proof materials, and have high barrier properties.

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