Double-layer composite leakproof paper cover

Abstract

The utility model discloses a double-layer composite leakproof paper cover which comprises an arranged paper cover body, a hierarchical assembly is arranged in the paper cover body, the hierarchical assembly comprises a first inner layer installed in the paper cover body, and a second inner layer used for increasing the strength of the paper cover body is arranged on the first inner layer. A waterproof surface layer is arranged on the second inner layer, a leakage-proof bottom layer is installed below the first inner layer, and air holes for exhausting are formed in the paper cover body. According to the double-layer composite leakproof paper cover, the first inner layer of the paper cover body is made of the paper material, the second inner layer at the upper end of the paper cover body enhances the overall strength and protection performance, provides certain structural support and prevents internal articles from being damaged or affected by external pressure, and the surface layer on the second inner layer is made of the waterproof coating material, so that the paper cover body is prevented from being damaged due to damp; the replacement frequency caused by material damage is reduced, the overall structure is simple, production operation is convenient, and the production complexity and cost are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of paper caps, specifically a double-layer composite leak-proof paper cap. Background Technology

[0002] Paper lids are commonly used in packaging design, especially in the sealed packaging of beverages, food, and pharmaceuticals. Their main purpose is to protect the contents, ensure airtightness, and facilitate transportation and storage. However, existing paper lids still have certain drawbacks. While ordinary paper lids can seal the opening of disposable paper cups, they do not allow air to pass through and dissipate heat, affecting the heat dissipation of hot beverages, increasing waiting time for drinking, and causing inconvenience.

[0003] To overcome the above-mentioned defects, the prior art (Chinese patent with announcement number CN220097169U, announcement date November 28, 2023) provides a breathable and leak-proof paper cover, including a bottom paper, a cover paper, and an edge paper. The edge of the bottom paper is bent upward to form an arc-shaped annular step. The edge paper is ring-shaped, with its upper part covering the annular step and its lower part bending inward to form a double-layer sidewall. The edge of the cover paper is connected to the upper part of the edge paper, forming a waterproof cavity between the cover paper and the bottom paper. A first vent hole is provided on the cover paper, and a second vent hole is provided on the bottom paper. The first and second vent holes are staggered. An annular protrusion is provided on the inner wall of the double-layer sidewall. The protrusion and the inner wall of the annular step form a snap-fit ​​groove, thereby achieving the purpose of venting hot drinks in the paper cup, accelerating heat dissipation and cooling, reducing the waiting time of drinks, and preventing the paper cup from leaking drinks during vibration.

[0004] While existing technologies use ventilation holes on the paper cover to allow for air dissipation, during use, hot air passing through the ventilation holes causes water vapor to condense, which in turn wets the area around the ventilation holes, reducing the strength of the paper cover and making it prone to breakage or leakage. The paper cover manufacturing process requires multiple bending, folding, and connecting steps, which not only increases the complexity and cost of production but also affects production efficiency.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on the existing double-layer composite leak-proof paper cover. Therefore, we proposed that the double-layer composite leak-proof paper cover can effectively solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a double-layer composite leak-proof paper cover to solve the problems mentioned in the background art. Currently, the paper cover on the market is designed with vents to allow for ventilation and heat dissipation. However, during use, hot air passing through the vents causes water vapor to condense, which wets the area around the vents, reduces the strength of the paper cover, and easily leads to damage or leakage. The paper cover manufacturing process requires multiple bending, folding, and connecting steps, which not only increases the complexity and cost of production but also affects production efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a double-layer composite leak-proof paper cover, comprising a paper cover body, wherein a layered assembly is provided inside the paper cover body, the layered assembly comprising a first inner layer installed inside the paper cover body, a second inner layer provided on the first inner layer for increasing the strength of the paper cover body, a surface layer provided on the second inner layer for waterproofing, a bottom layer for leak prevention installed below the first inner layer, and a vent hole for venting the paper cover body.

[0008] Preferably, a reinforcing sheet is provided inside the paper cover body, and the reinforcing sheet is arranged in a ring.

[0009] Preferably, a reinforcing member is installed on the inner side of the paper cover body, and the reinforcing member is symmetrically arranged.

[0010] Preferably, an auxiliary piece is installed on the side of the paper cover body, and a snap-fit ​​groove is opened on the bottom side of the paper cover body.

[0011] Preferably, a first arc groove is formed on the inner side of the snap-fit ​​groove, and the diameter of the first arc groove located at the auxiliary piece side end is larger than the diameter of the first arc groove at other positions.

[0012] Preferably, a first arc block is installed inside the snap-fit ​​groove, and a snap-fit ​​block is provided on the paper cover body, the snap-fit ​​block being adapted to the snap-fit ​​groove.

[0013] Preferably, a second arc groove is provided on one side of the snap-fit ​​block, and the second arc groove is adapted to the first arc block.

[0014] Preferably, a second arc block is installed on the other side of the snap-fit ​​block, and the second arc block is adapted to the first arc groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The first inner layer of this double-layer composite leak-proof paper cover is made of paper material, and the second inner layer at its upper end enhances the overall strength and protection, providing structural support to prevent damage to internal items or external pressure. The surface layer of the second inner layer is made of waterproof coating material to prevent the paper cover from being damaged by moisture, reducing the frequency of replacement due to material damage. The overall structure is simple, convenient for production operations, and reduces the complexity and cost of production. The specific details are as follows:

[0016] (1) The second inner layer at the top of the first inner layer of the paper cover body enhances the overall strength and protection. The surface layer of the second inner layer is made of waterproof coating material to prevent the paper cover body from being damaged by moisture, reduce the frequency of replacement due to material damage, and the overall structure is simple, reducing the complexity and cost of production.

[0017] (2) The ring-shaped reinforcing piece inside the paper cover body enhances the paper cover body's ability to protect the contents and increases the strength of the paper cover body. The reinforcing piece inside the paper cover body makes it easier for users to pick up the paper cover body and other paper structures at the same time, reducing the collapse of the paper cover body.

[0018] (3) The paper cover body is snapped into other paper structures through the snap-fit ​​groove at the bottom, making the connection between the paper cover body and other paper structures more stable. The diameter of the first arc groove inside the snap-fit ​​groove at the side end of the auxiliary piece is larger than the diameter of the first arc groove at other positions, making it convenient for users to separate the paper cover body from other paper structures through the auxiliary piece at the side end of the paper cover body, thus improving the efficiency of use.

[0019] (4) The first arc block inside the snap-fit ​​groove makes the snap-fit ​​groove snap-fit ​​with other paper structures, making the connection between the paper cover body and other paper structures more stable and preventing the paper cover body from accidentally separating.

[0020] (5) The snap-fit ​​block on the paper cover body can be easily snapped into the inside of the snap-fit ​​groove, so that the second arc block on the side end of the snap-fit ​​block is snapped into the first arc groove of the snap-fit ​​groove. The paper cover body is snapped in place by the cooperation of the snap-fit ​​groove and the snap-fit ​​block, ensuring the safety of the paper cover body during transportation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal hierarchical structure of the paper cover body of this utility model;

[0023] Figure 3 This is a bottom view of the paper cover body of this utility model.

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the paper cover body of this utility model;

[0025] Figure 5 This is a schematic diagram of the connection structure between the paper cover body and the reinforcing sheet of this utility model;

[0026] Figure 6 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0027] Figure 7This is a schematic diagram of the cross-sectional structure of the auxiliary piece of this utility model.

[0028] In the diagram: 1. Paper cover body; 2. First inner layer; 3. Second inner layer; 4. Surface layer; 5. Bottom layer; 6. Ventilation hole; 7. Reinforcing sheet; 8. Reinforcing member; 9. Auxiliary sheet; 10. Snap-fit ​​groove; 11. First arc groove; 12. First arc block; 13. Snap-fit ​​block; 14. Second arc groove; 15. Second arc block. Detailed Implementation

[0029] 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.

[0030] Example 1: In this example, the surface layer 4 on the second inner layer 3 is made of waterproof coating material to prevent the paper cover body 1 from being damaged by moisture, reduce the frequency of replacement due to material damage, and lower the usage cost of the paper cover body 1. Figure 1 and Figure 2 The technical solution shown includes a paper cover body 1, inside which is a layered assembly. The layered assembly includes a first inner layer 2 installed inside the paper cover body 1, a second inner layer 3 on the first inner layer 2 to increase the strength of the paper cover body 1, a waterproof surface layer 4 on the second inner layer 3, and a leak-proof bottom layer 5 installed below the first inner layer 2. The paper cover body 1 has vent holes 6 for air release. The first inner layer 2 of the paper cover body 1 is made of paper material, possessing a certain degree of flexibility and plasticity. The second inner layer 3 at its upper end enhances the overall strength and protection, providing a certain degree of structural integrity. The structure provides support to prevent damage to the internal contents or the impact of external pressure, effectively protecting the internal contents and extending the shelf life of the paper lid body 1. The surface layer 4 on the second inner layer 3 is made of waterproof coating material to prevent the paper lid body 1 from being damaged by moisture, reducing the frequency of replacement due to material damage and lowering the cost of use. The bottom layer 5 at the bottom of the first inner layer 2 is also made of waterproof coating material, thereby improving the leak-proof performance of the paper lid body 1 and ensuring the stability of the structure. The overall structure is simple, convenient for production operations, and reduces the complexity and cost of production. The ventilation holes 6 on the paper lid body 1 facilitate ventilation and reduce the waiting time for beverages.

[0031] Example 2: In this example, the paper cover body 1 is engaged with other paper structures via the snap-fit ​​groove 10 at the bottom, making the connection between the paper cover body 1 and other paper structures more stable and preventing the paper cover body 1 from falling off. Specifically, as shown below... Figures 3-6As shown, a reinforcing piece 7 is provided inside the paper cover body 1, and the reinforcing piece 7 is arranged in a ring. Reinforcing members 8 are installed on the inner side of the paper cover body 1, and the reinforcing members 8 are arranged symmetrically. An auxiliary piece 9 is installed on the side end of the paper cover body 1. A snap-fit ​​groove 10 is opened on the bottom side of the paper cover body 1, and a first arc groove 11 is opened on the inner side of the snap-fit ​​groove 10. The diameter of the first arc groove 11 located on the side end of the auxiliary piece 9 is larger than the diameter of the first arc groove 11 at other locations. The ring-shaped reinforcing piece 7 inside the paper cover body 1 enhances the overall rigidity of the paper cover body 1 from the inside, making the paper cover body 1 less prone to deformation when subjected to pressure or impact, further improving the protection capability of the paper cover body 1 for the contents, and increasing the strength of the paper cover body 1. The reinforcing members 8 on the inner side of the paper cover body 1 not only make the connection between the paper cover body 1 and other paper structures more stable, but also facilitate the user to take out the contents at the same time. The paper cover body 1 is separated from other paper structures, reducing the risk of collapse and improving ease of use. The paper cover body 1 is secured to other paper structures via the snap-fit ​​groove 10 at the bottom, making the connection between the paper cover body 1 and other paper structures more stable, preventing the paper cover body 1 from falling off, and ensuring the integrity of the overall structure. The inner side of the first arc groove 11 on the inner side of the snap-fit ​​groove 10 facilitates snap-fit ​​with the outer ring of other paper structures. The diameter of the first arc groove 11 on the inner side of the snap-fit ​​groove 10 at the side end of the auxiliary piece 9 is larger than the diameter of the first arc groove 11 at other positions, making it easier for users to separate the paper cover body 1 from other paper structures using the auxiliary piece 9 on the side end of the paper cover body 1. The overall structure not only ensures tight connection but also facilitates disassembly and operation. Without the need for tools, the paper cover can be easily separated from other structures, improving efficiency.

[0032] Example 3: In this example, the paper cover body 1 is engaged with the engaging block 13 via the engaging slot 10, facilitating the transportation of the paper cover body 1. Specifically, as shown below... Figures 3-7As shown, a first arc block 12 is installed inside the snap-fit ​​groove 10, and a snap-fit ​​block 13 is provided on the paper cover body 1. The snap-fit ​​block 13 is adapted to the snap-fit ​​groove 10. A second arc groove 14 is opened on one side of the snap-fit ​​block 13, which is adapted to the first arc block 12. A second arc block 15 is installed on the other side of the snap-fit ​​block 13, which is adapted to the first arc groove 11. The first arc block 12 inside the snap-fit ​​groove 10 enables the snap-fit ​​groove 10 to snap into connection with other paper structures, making the connection between the paper cover body 1 and other paper structures more stable and preventing the paper cover body 1 from accidentally separating. The snap-fit ​​block 13 can be easily snapped into the inside of the snap-fit ​​groove 10, so that the second arc block 15 on the side end of the snap-fit ​​block 13 snaps into the first arc groove 11 of the snap-fit ​​groove 10. At this time, the first arc block 12 on the inside of the snap-fit ​​groove 10 snaps into the second arc groove 14 on the side end of the snap-fit ​​block 13, so that the paper cover body 1 is snapped into place by the cooperation of the snap-fit ​​groove 10 and the snap-fit ​​block 13, making the paper cover body 1 easy to transport, preventing damage to the paper cover body 1 due to bumps, and ensuring the safety of the paper cover body 1 during transportation. The contents not described in detail in this specification are prior art known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-layer composite leak-proof paper cover, comprising a paper cover body (1), characterized in that, The paper cover body (1) is provided with a layered assembly inside. The layered assembly includes a first inner layer (2) installed inside the paper cover body (1), a second inner layer (3) provided on the first inner layer (2) for increasing the strength of the paper cover body (1), a surface layer (4) for waterproofing provided on the second inner layer (3), a bottom layer (5) for leak prevention installed under the first inner layer (2), and a vent hole (6) for venting.

2. The double-layer composite leak-proof paper cover according to claim 1, characterized in that: The paper cover body (1) is provided with a reinforcing piece (7) inside, and the reinforcing piece (7) is arranged in a ring.

3. The double-layer composite leak-proof paper cover according to claim 1, characterized in that: A reinforcing member (8) is installed on the inner side of the paper cover body (1), and the reinforcing member (8) is arranged symmetrically.

4. The double-layer composite leak-proof paper cover according to claim 1, characterized in that: An auxiliary piece (9) is installed on the side of the paper cover body (1), and a snap-fit ​​groove (10) is opened on the bottom side of the paper cover body (1).

5. The double-layer composite leak-proof paper cover according to claim 4, characterized in that: The inner side of the snap-fit ​​groove (10) is provided with a first arc groove (11), and the diameter of the first arc groove (11) located at the side end of the auxiliary piece (9) is larger than the diameter of the first arc groove (11) at other positions.

6. The double-layer composite leak-proof paper cover according to claim 5, characterized in that: A first arc block (12) is installed inside the snap-fit ​​groove (10), and a snap-fit ​​block (13) is provided on the paper cover body (1), the snap-fit ​​block (13) being adapted to the snap-fit ​​groove (10).

7. The double-layer composite leak-proof paper cover according to claim 6, characterized in that: The snap-fit ​​block (13) has a second arc groove (14) on one side, which is adapted to the first arc block (12).

8. The double-layer composite leak-proof paper cover according to claim 7, characterized in that: A second arc block (15) is installed on the other side of the snap-fit ​​block (13), and the second arc block (15) is adapted to the first arc groove (11).

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