Water-leakage-proof take-out bag with bottom sealed

By combining an aluminum-coated inner layer and a fusion coating with a sealing strip on the bottom of the paper takeout bag, the problems of waterproofing and heat preservation are solved, achieving environmental friendliness and cost reduction, and enhancing brand competitiveness.

CN223792088UActive Publication Date: 2026-01-13HUBEI KANGDING PACKAGING CO LTD
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Patent Information

Application Number
CN202520545807.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-26
Publication Date
2026-01-13
Estimated Expiration
2035-03-26

AI Technical Summary

Technical Problem

The existing takeaway bags have poor bottom sealing, resulting in poor waterproof performance, allowing drinks or soup to easily seep in and affecting hygiene; the takeaway bags are made of plastic, which is not environmentally friendly, and the need for anti-theft strips increases production costs.

Method used

The takeaway bag, made of paper, has an aluminum-coated film coating and multiple fusion coatings on the inside. Combined with the bottom sealing strip and easy-tear adhesive area, it achieves the functions of sealing and heat preservation of the bag. The bag can be opened by tearing the surface of the bag to determine whether it has been opened, which is an alternative to the anti-theft strip.

Benefits of technology

It achieves excellent waterproof and heat insulation effects, reduces production costs, improves environmental friendliness, reduces landfill waste, enhances brand image, and avoids additional equipment or labor costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223792088U_ABST
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Abstract

The utility model provides a bottom-sealed water-leakage-proof take-out bag which comprises a bag body, handles are arranged on the outer portions of the two sides of the bag body, a pasting area is arranged on one side of the bag body, an easy-to-tear strip is arranged on the pasting area, the bag body comprises a bag bottom area at the bottom, a plurality of fusion coatings are arranged at the bottom of the bag body, and a bottom sealing paper strip is arranged on the bag bottom area. A plurality of fusion coatings seal one end of the bag body. The multiple fusion coatings enable one end of the bag body to be well sealed, the bottom of the bag body is further sealed through the bottom sealing paper strip, and when soup in drinks or meals is splashed to the bottom of the take-out bag, the bag body can be well sealed through the two-layer structure of the multiple fusion coatings and the bottom sealing paper strip, so that the good waterproof effect is achieved. The phenomena that beverages or soup easily permeate out of the bottom of the take-out bag, so that bacteria are bred, the sanitary condition is affected, peculiar smell is generated when cleaning is not conducted in time, and the experience of customers is greatly affected are avoided, and meanwhile the bag body can be used for the second time.
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Description

Technical Field

[0001] This utility model relates to the field of takeaway bags, and in particular to a waterproof takeaway bag with a sealed bottom. Background Technology

[0002] Existing takeout bags are made of materials such as polyethylene (PE) and polypropylene (PP). The bottom of these bags is typically sealed by attaching the top seal to the bottom seal, forming a V-shape to close the bag. However, because the bottom of these bags is not properly sealed, they do not provide adequate waterproofing. Customers may spill drinks or food on the bottom of the bag while exercising or inadvertently. With prolonged use, this spillage can easily seep out, leading to bacterial growth, hygiene issues, and unpleasant odors if not cleaned promptly. This significantly impacts the customer experience and also limits the bag's reusability.

[0003] The existing takeout bags are made of plastic, which makes them non-recyclable and environmentally unfriendly. The handles are located inside the bag, preventing a proper seal and insulation, causing the food inside to cool down too quickly and affecting customer experience.

[0004] Existing takeout bags are typically made of plastic. To prevent theft, an anti-theft strip is usually added to the outside of the bag. However, the anti-theft strip itself has procurement costs, and installing it may require additional equipment or labor, all of which increase the production cost of the takeout bag and potentially raise costs for businesses. Therefore, we propose a leak-proof takeout bag with a sealed bottom to solve these problems. Utility Model Content

[0005] This utility model provides a leak-proof takeaway bag with a sealed bottom, solving the problems of existing takeaway bags having inadequate bottom sealing, failing to provide good waterproofing, allowing drinks or soup to easily seep out from the bottom of the bag, affecting its use, being made of plastic which is not environmentally friendly, not providing good insulation, and requiring anti-theft strips to prevent theft, which increases costs.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sealed bottom waterproof takeaway bag, including a bag body, handles on both sides of the bag body, an adhesive area on one side of the bag body, an easy-tear strip on the adhesive area, a bottom area of ​​the bag body, multiple fused coatings on the bottom of the bag body, and a sealing paper strip on the bottom area.

[0007] Multiple fused coatings seal one end of the bag.

[0008] In the preferred embodiment, the bag body is made of paper material.

[0009] In the preferred embodiment, the inner side of the bag is coated with an aluminum-plated film material.

[0010] In a preferred embodiment, the inner side of the bag is coated with one or more of the following: PE coating, PLA coating, and plastic-free coating.

[0011] In a preferred embodiment, the adhesive area is provided with a connecting adhesive, and the connecting adhesive is provided with an easy-tear strip, with both ends of the easy-tear strip extending out of the adhesive area.

[0012] In the preferred embodiment, one end of the handle is provided with a side seal, which is affixed to the outside of the bag body, and the side seal is made of paper.

[0013] In the preferred embodiment, the bag body has a hollow structure, and side folds are provided on both sides of the bag body.

[0014] In the preferred embodiment, a sealing area is provided at one end of the bottom area of ​​the bag, and multiple fused coatings are pressed onto the sealing area.

[0015] In the preferred embodiment, fold lines are provided at both ends of the bottom area of ​​the bag, and both ends of the bottom area of ​​the bag can be folded along the fold lines.

[0016] In a preferred embodiment, the bottom sealing strip is provided with a second connecting adhesive, and the bottom sealing strip is connected to the bottom of the bag body through the second connecting adhesive.

[0017] The beneficial effects of this utility model are as follows: Before the bag body is formed by pasting the bottom sealing strip, multiple fusion coatings are used to press the opening at one end of the bag body to fuse the two sides of the bag body together, thus sealing the bag body. The area where the multiple fusion coatings press the bag body is the bottom sealing area. The bottom sealing area is folded upwards so that it rests against the bottom area of ​​the bag. The two ends of the bottom area are V-shaped folds, and the two ends of the V-shaped folds are folded along the fold lines so that the tips of the two V-shaped folds are aligned inwards. Finally, the two ends of the bottom sealing strip are pasted onto the V-shaped folds, and the middle part of the bottom sealing strip is pasted onto the bottom area of ​​the bag. The multiple fusion coatings form a good seal at one end of the bag body, and the bottom sealing strip further seals the bottom. When soup or liquid from drinks or meals spills onto the bottom of the takeaway bag, the two-layer structure of the multiple fusion coatings and the bottom sealing strip allows the bag body to be sealed well, thus providing a good waterproof effect. To prevent beverages or soup from easily seeping out from the bottom of the takeout bag, which could breed bacteria, affect hygiene, and cause odors if not cleaned in time, greatly impacting the customer experience, the bag can also be reused.

[0018] The bag body, side seals, and bottom seal are all made of paper to make the overall structure recyclable, thus making it environmentally friendly and in line with environmental protection principles. This reduces landfill and incineration waste, minimizes environmental pollution, and enhances the brand image. This environmentally friendly approach can attract more environmentally conscious consumers, strengthen the brand's competitiveness and reputation, and ultimately promote sustainable development.

[0019] The handle of this device is located on the outside of the bag. After the easy-tear strip on the adhesive area is peeled off, the adhesive on the adhesive area adheres to the inside of the other handle, sealing the other end of the bag. The adhesive area, easy-tear strip, and handle work together to ensure a good seal for the entire takeout bag, providing excellent insulation and preventing the food inside from cooling down too quickly, which could affect customer use. The inner coating of the bag is an aluminized film, further enhancing the overall insulation function while reducing production costs.

[0020] The adhesive strip of this device is attached to the inside of the bag body on the other handle, sealing the other end of the bag. When the user needs to open the bag, they simply tear off the adhesive strip. Since the bag is made of paper, tearing off the adhesive strip will damage the outer surface of the bag. Users can determine whether the bag has been opened by observing the tear, thus ensuring the overall structure functions as an anti-theft device and eliminating the need for tamper-evident strips. This avoids the need for additional equipment or labor required for tamper-evident strips, which would increase the production cost of takeout bags, making this device highly valuable for widespread adoption. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0022] Figure 1 This is an axonometric view of the overall structure of this utility model;

[0023] Figure 2 This is an axonometric view of the overall structure of this utility model from another perspective;

[0024] Figure 3 This is a utility model Figure 1 A magnified view of A in the middle;

[0025] Figure 4 This is a front view of the first step in the folding process of the bag body of this utility model;

[0026] Figure 5 This is a front view of the second step in the folding process of the bag body of this utility model;

[0027] Figure 6 This is a front view of the third step in the folding process of the bag body of this utility model;

[0028] Figure 7 This is a front view of the fourth step in the folding process of the bag body of this utility model;

[0029] Figure 8 This is a front view of the fifth step in the folding process of the bag body of this utility model;

[0030] Figure 9 This is a utility model Figure 4 Axonometric view;

[0031] Figure 10 This is a utility model Figure 5 Axonometric view;

[0032] Figure 11 This is an axonometric view of a prior art packaging bag;

[0033] In the diagram: 1. Bag body; 101. Bottom area; 102. Figure-eight fold bottom; 103. Bottom sealing area; 104. Side crease; 105. Fold line; 2. Coating; 3. Handle; 301. Slide rail; 4. Side seal; 5. Adhesive area; 501. Easy-tear strip; 6. Bottom sealing strip; 7. Fusion coating; 8. Bottom sealing surface; 9. Top bottom sealing surface; 901. Bottom bottom sealing surface; 902. Detailed Implementation

[0034] Example 1:

[0035] like Figure 1-11 In the present invention, a leak-proof takeaway bag with a sealed bottom includes a bag body 1, with handles 3 on both sides of the bag body 1, an adhesive area 5 on one side of the bag body 1, an easy-tear strip 6 on the adhesive area 5, a bottom area 101 of the bag body 1, multiple fusion coatings 8 on the bottom of the bag body 1, and a sealing paper strip 7 on the bottom area 101.

[0036] Multiple fusion coatings 8 seal one end of the bag body 1. With this structure, before the bottom sealing strip 7 is attached and formed, the opening at one end of the bag body 1 is pressed together by multiple fusion coatings 8 to fuse the two sides of the bag body 1 together, thus sealing the bag body 1. The area where the multiple fusion coatings 8 press the bag body 1 is the bottom sealing area 103. The bottom sealing area 103 is folded upwards so that it rests against the bottom area 101. The two ends of the bottom area 101 are V-shaped folds 102. The two ends of the V-shaped folds 102 are folded along the fold line 105 so that the tips of the two V-shaped folds 102 are aligned inwards. Finally, the two ends of the bottom sealing strip 7 are attached to the V-shaped folds 102, and the middle of the bottom sealing strip 7 is attached to the bottom area 101. Multiple fused coatings 8 create a good seal at one end of the bag body 1, and a bottom sealing strip 7 further seals the bottom. When beverages or soup spills onto the bottom of the takeout bag, the two-layer structure of the fused coatings 8 and the bottom sealing strip 7 ensures a good seal, providing excellent waterproofing. This prevents beverages or soup from easily seeping out from the bottom of the takeout bag, which could lead to bacterial growth, affecting hygiene, and causing unpleasant odors if not cleaned promptly, greatly impacting the customer experience. Furthermore, the bag body 1 can be reused.

[0037] The bag body 1, side seal 4, and bottom sealing strip 7 are all made of paper to enable the overall structure to be recycled, making the overall structure environmentally friendly and in line with environmental protection concepts. This reduces the amount of waste going to landfills and incineration, reduces environmental pollution, and enhances the brand image. This environmentally friendly approach can attract more environmentally conscious consumers, enhance the brand's competitiveness and reputation, and ultimately promote sustainable development.

[0038] The handle 3 of this device is located on the outside of the bag body 1. When the easy-tear strip 6 on the adhesive area 5 is torn off, the adhesive 501 of the adhesive area 5 is used to adhere to the inside of the other handle 3, thus sealing the other end of the bag body 1. The adhesive area 5, the easy-tear strip 6, and the handle 3 work together to ensure that the entire takeaway bag is well sealed, providing good insulation and preventing the food inside from cooling down too quickly, which could affect customer use. The coating 2 on the inside of the bag body 1 is an aluminum-plated film, which further enhances the overall insulation function while reducing production costs.

[0039] The adhesive 501 of the adhesive area 5 of this device is attached to the inner side of the bag body 1 of the other handle 3, sealing the other end of the bag body 1. When the user needs to open the bag body 1, they can tear off the adhesive area 5. Since the bag body 1 is made of paper, tearing off the adhesive area 5 will tear and damage the outer surface of the bag body 1. The user can determine whether the bag body 1 has been opened by checking whether the surface of the bag body 1 is torn or damaged, thus ensuring that the overall structure can play an anti-theft role and avoiding the need for anti-theft strips. This avoids the need for additional equipment or labor to install anti-theft strips, which would increase the production cost of the takeout bag.

[0040] The outer material of bag 1 is paper. Compared with some plastic or composite material takeout bags, the production process of paper takeout bags is relatively simple. It does not require complex injection molding, lamination, or other processes, which often consume a lot of energy and generate significant carbon emissions. Paper takeout bags can typically be formed through simple cutting, folding, and printing, effectively reducing energy consumption and carbon emissions during production. Paper takeout bags also have good recyclability; recycled paper can be re-pulped and used to make new paper, further reducing environmental pressure and carbon emissions from producing new raw materials.

[0041] In the preferred embodiment, the bag body 1 is made of paper. With this structure, the bag body 1, side seals 4, and bottom sealing strips 7 are all made of paper, enabling the overall structure to be recyclable and environmentally friendly. This aligns with environmental protection principles, reduces landfill and incineration waste, minimizes environmental pollution, and enhances brand image. This environmentally conscious approach can attract more environmentally conscious consumers, strengthen brand competitiveness and reputation, and ultimately promote sustainable development.

[0042] Since the material of bag 1 is paper, the outer surface of bag 1 will be torn and damaged when the adhesive area 5 is torn. Users can determine whether bag 1 has been opened by checking whether the surface of bag 1 is torn or damaged, thus ensuring that the overall structure can function as an anti-theft device.

[0043] In a preferred embodiment, the inner side of the bag body 1 is provided with a coating 2, which is an aluminized film material. This structure allows for the use of an aluminized film coating at a lower cost, reducing production costs. The aluminized film coating 2 on the inner side of the bag body 1 further enhances the overall structure's heat insulation function.

[0044] In a preferred embodiment, the inner side of the bag body 1 is provided with a coating 2, which is one or more of PE coating, PLA coating, and plastic-free coating. With this structure,

[0045] In a preferred embodiment, the adhesive area 5 is provided with a connecting adhesive 501, and the connecting adhesive 501 is provided with an easy-tear strip 6, with both ends of the easy-tear strip 6 extending out of the adhesive area 5. With this structure, the handle 3 of this device is located on the outside of the bag body 1. When the easy-tear strip 6 on the adhesive area 5 is torn off, the connecting adhesive 501 of the adhesive area 5 adheres to the inside of the other handle 3, thus sealing the other end of the bag body 1. The adhesive area 5, the easy-tear strip 6, and the handle 3 work together to ensure a good seal for the entire takeaway bag, providing excellent insulation.

[0046] The adhesive 501 of the adhesive area 5 of this device is attached to the inner side of the bag body 1 of the other handle 3, sealing the other end of the bag body 1. When the user needs to open the bag body 1, they can tear off the adhesive area 5. Since the bag body 1 is made of paper, tearing off the adhesive area 5 will tear and damage the outer surface of the bag body 1. The user can determine whether the bag body 1 has been opened by checking whether the surface of the bag body 1 is torn or damaged, thus ensuring that the overall structure can play a theft prevention role.

[0047] In a preferred embodiment, one end of the handle 3 is provided with a side seal 4, which is affixed to the outside of the bag body 1. The side seal 4 is made of paper. This structure makes the handle 3 easy for the user to lift.

[0048] In the preferred embodiment, the bag body 1 has a hollow structure, and side folds 104 are provided on both sides of the bag body 1. With this structure, the bag bodies 1 are folded together through the side folds 104, so that when multiple bag bodies 1 are placed, space can be saved greatly.

[0049] In a preferred embodiment, a sealing area 103 is provided at one end of the bottom area 101, and multiple fusion coatings 8 are pressed onto the sealing area 103. With this structure, the multiple fusion coatings 8 are pressed onto the sealing area 103 to fuse the two sides of the bag body 1, thereby sealing one end of the bag body 1. The fusion coating 8 is PLA, a colorless coating, or an aluminized film, and the fusion coating 8 fuses with the bag body 1 through high temperature.

[0050] In a preferred embodiment, the bottom area 101 has fold lines 105 at both ends, and the bottom area 101 can be folded along the fold lines 105. With this structure, the figure-eight folds 102 on both sides are folded along the fold lines 105 so that the tips of the two figure-eight folds 102 are aligned with each other. The sealing strips 7 are then pasted to the bottom of the two figure-eight folds 102 at both ends to further form a seal.

[0051] In a preferred embodiment, the bottom sealing strip 7 is provided with a second connecting adhesive, and the bottom sealing strip 7 is connected to the bottom of the bag body 1 through the second connecting adhesive. Therefore, the material of the bottom sealing strip 7 is paper.

[0052] Example 2:

[0053] Further explanation in conjunction with Example 1: Figure 11 This is a schematic diagram of the existing bottom sealing structure. The second bag body on both sides is folded, and then the bottom of the upper bottom sealing surface 901 abuts against the top of the lower bottom sealing surface 902. The two bottom sealing surfaces are glued together to seal the second bag body.

[0054] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A leak-proof takeout bag with a sealed bottom, characterized in that: Includes a bag body (1), with handles (3) on both sides of the bag body (1), an adhesive area (5) on one side of the bag body (1), an easy-tear strip (6) on the adhesive area (5), a bottom area (101) at the bottom of the bag body (1), multiple fusion coatings (8) on the bottom of the bag body (1), and a sealing strip (7) on the bottom area (101). Multiple fused coatings (8) seal one end of the bag body (1).

2. The leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: The bag body (1) is made of paper material.

3. The leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: The inner side of the bag body (1) is provided with a coating (2), which is an aluminum-plated film material.

4. The leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: The inner side of the bag body (1) is provided with a coating (2), which is one or more of PE coating, PLA coating, and plastic-free coating.

5. The leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: The adhesive area (5) is provided with adhesive (501), and the adhesive (501) is provided with an easy-tear strip (6), with both ends of the easy-tear strip (6) extending out of the adhesive area (5).

6. The leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: One end of the handle (3) is provided with a side seal (4), which is pasted on the outside of the bag body (1). The material of the side seal (4) is paper.

7. The leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: The bag body (1) has a hollow structure, and side folds (104) are provided on both sides of the bag body (1).

8. A leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: A sealing area (103) is provided at one end of the bottom area (101), and multiple fusion coatings (8) are pressed on the sealing area (103).

9. A leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: The bottom area (101) of the bag has fold lines (105) at both ends, and the bottom area (101) of the bag can be folded along the fold lines (105).

10. A leak-proof takeaway bag with a sealed bottom according to claim 1, characterized in that: The bottom sealing strip (7) is provided with a second connecting adhesive, and the bottom sealing strip (7) is connected to the bottom of the bag body (1) through the second connecting adhesive.