A packaging bag

Abstract

The utility model belongs to the technical field of packing bag, especially a packing bag, including the bag body, the bag body is by the bubble -proof paper of inner layer, the kraft paper of middle layer and the membrane layer of outer layer constitute, the bubble -proof paper is through the starch glue joint and covers the kraft paper of middle layer, forms on the kraft paper of middle layer and sprays the membrane layer, the side of bag body is equipped with the crease, and the crease is folded into triangular shape, the top side of bag body is integrally formed with the folding cover, and the folding cover is fixedly connected with disposable sticky tape, the utility model discloses, the bag body is by the bubble -proof paper, kraft paper and membrane layer constitute, the bubble -proof paper has the water absorption, heat preservation buffering effect, has certain coffee aroma, and the kraft paper is made of bearing, and the membrane layer can degrade environmental protection, waterproof and dirt-proof, the side crease can be folded triangular shape, and it is convenient to store, and the disposable sticky tape sealing leak protection is matched with the folding cover on the top, and the rope or handle groove is convenient to carry, and the size is adapted to the take-out meal product loading, and it has practicality and environmental protection, solves the traditional packing pollution and the performance problem of deficiency.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag technology, specifically to a packaging bag. Background Technology

[0002] With the rapid development of the food delivery industry, the use of food delivery packaging has increased dramatically. Traditional insulated food delivery bags are mostly made of non-degradable plastic materials. These materials are difficult to degrade in the natural environment, causing long-term pollution, creating white pollution, and seriously disrupting the ecological balance. At the same time, existing insulated bags also have certain shortcomings in terms of insulation performance, load-bearing capacity, and printing aesthetics, and cannot fully meet the needs of the food delivery industry.

[0003] Therefore, developing a takeaway insulated bag with good heat preservation performance, load-bearing capacity, and biodegradability is of great practical significance. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, the present invention provides a packaging bag that solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A packaging bag includes a bag body, which is composed of an inner layer of bubble wrap, a middle layer of kraft paper, and an outer layer of coating; the bubble wrap is bonded to the middle layer of kraft paper with starch adhesive, and the coating layer is coated on the middle layer of kraft paper.

[0009] The side of the bag has creases, which are used to fold it into a triangular shape.

[0010] The top side of the bag is integrally formed with a flap, and a disposable adhesive tape is fixedly connected to the flap for sealing the bag.

[0011] Two symmetrical carrying straps are fixedly glued to both sides of the bag.

[0012] Furthermore, the foam paper is composed of 80-95% virgin pulp, 5-15% adhesive, 0-5% functional additives, and 3-5% coffee grounds, which serves to absorb water and retain heat, and also has the aroma of coffee.

[0013] Furthermore, the kraft paper is composed of 85% softwood pulp, 12% hardwood pulp, 2% starch, and 1% calcium carbonate, which serves as a support.

[0014] Furthermore, the coating layer is formed by mixing and coating any combination of PBAT / PLA / PBSAT / PESAT, and serves as a waterproof and stain-resistant coating.

[0015] Furthermore, the length, width, and height of the bag are 250mm, 160mm, and 300mm, respectively.

[0016] Furthermore, a through handle groove can be provided on the bag body.

[0017] A method for manufacturing a packaging bag includes: melting and granulating a coating material and then coating it onto a middle layer made of kraft paper to form kraft paper and a coating layer; coating an inner layer of bubble wrap with starch adhesive and then hot-pressing it with the kraft paper; and finally cutting, folding, and heat-sealing it to form a packaging bag.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a packaging bag with the following beneficial effects:

[0020] This utility model features a bag body composed of bubble wrap, kraft paper, and a laminated layer. The bubble wrap has water absorption, heat insulation, and cushioning properties, and also has a slight coffee aroma. The kraft paper is made to bear weight, and the laminated layer is biodegradable, environmentally friendly, waterproof, and stain-resistant. The side folds allow for a triangular fold for easy storage. The top flap is sealed with a disposable adhesive tape to prevent leakage. The carrying strap or handle groove makes it easy to carry. The size is suitable for loading takeout food, combining practicality and environmental friendliness, and solving the problems of pollution and performance deficiencies of traditional packaging. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0022] Figure 2 This utility model Figure 1 Schematic diagram of the central sealing structure;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0024] Figure 4 This utility model Figure 3 Schematic diagram of the central sealing structure;

[0025] Figure 5 This is a schematic diagram of the bag body structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the physical components of the bag body of this utility model.

[0027] In the picture: 1. Bag body; 11. Bubble wrap; 12. Kraft paper; 13. Coated layer; 2. Crease; 3. Fold-out flap; 4. Disposable adhesive tape; 5. Carrying rope; 6. Handle groove. Detailed Implementation

[0028] 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.

[0029] Example 1

[0030] like Figure 1-2 As shown in Figures 5-6, an embodiment of the present invention provides a packaging bag, which includes a bag body 1. The bag body 1 is composed of an inner bubble wrap 11, a middle kraft paper 12, and an outer coating layer 13. The bubble wrap 11 is bonded to the middle kraft paper 12 with starch adhesive, and the coating layer 13 is coated on the middle kraft paper 12.

[0031] A multi-layer composite structure is formed, combining the advantages of each layer of materials. The bubble wrap 11 provides heat insulation and cushioning, the kraft paper 12 is load-bearing and sturdy, and the coating layer 13 is waterproof, stain-resistant and environmentally friendly, giving the bag body good comprehensive performance and meeting the various needs of takeaway packaging.

[0032] The bag body 1 has creases 2 on its side, which allow it to be folded into a triangular shape; this allows the bag body 1 to be folded into both a sealed and an open shape, such as... Figure 1 and 3 As shown, it is easy to store, saves space, and is also more convenient to transport or store;

[0033] The top side of the bag body 1 is integrally formed with a flap 3, and a disposable adhesive tape 4 is fixedly connected to the flap 3 for sealing the bag body 1; the flap 3 and the disposable adhesive tape 4 cooperate to seal the bag body 1, prevent items from falling or leaking, and ensure the safety and hygiene of the contents;

[0034] The disposable adhesive tape 4 achieves a sealed connection between the flap 3 and the bag body 1, and has the characteristic of being for single use, ensuring the airtightness and anti-counterfeiting of the packaging;

[0035] Two symmetrical carrying straps 5 are fixedly glued to both sides of the bag body 1; this makes it convenient for users to carry the packaging bag and improves the ease of use.

[0036] The bag body 1 is composed of an inner layer of bubble wrap 11, an outer layer of kraft paper 12, and a coated film layer 13. The bubble wrap 11 provides insulation and cushioning, the kraft paper 12 provides a certain load-bearing capacity, and the coated film layer 13 gives the bag body 1 biodegradable and environmentally friendly properties, as well as waterproofing. Side creases 2 allow the bag body 1 to be folded into a triangular shape for easy storage or reshaping. A top flap 3 seals the bag body 1 with a disposable adhesive tape 4, preventing items from falling out or leaking. Carrying straps 5 secured to both sides make it easy for users to carry the bag.

[0037] like Figure 5-6 As shown, in some embodiments, the foam-pressed paper 11 is composed of 80-95% virgin pulp, 5-15% adhesive, 0-5% functional additives, and 3-5% coffee grounds. It serves to absorb water and retain heat, and also has a coffee aroma. The foam-pressed paper 11 is formed into a bubble-like cavity structure through a molding process, filled with air. Air is a poor conductor of heat, effectively blocking heat conduction, thereby reducing heat exchange between the inside and outside of the bag 1 and achieving a heat-retaining effect. The functional additives can be heat-retaining agents, enhancing the material's ability to reflect or absorb heat and improving heat retention efficiency. The 3-5% coffee grounds provide a certain aroma, embodying the ESG (Environmental, Social, and Governance) concept.

[0038] like Figure 5-6 As shown, in some embodiments, the kraft paper 12 is composed of 85% softwood pulp, 12% hardwood pulp, 2% starch, and 1% calcium carbonate, serving a supporting function; the softwood and hardwood pulp in the kraft paper 12 provide the mechanical basis, while the starch and calcium carbonate optimize the structural strength and stiffness. This composition not only meets the load-bearing capacity requirements of takeout packaging but also works with other layers to maintain the shape of the bag 1, ensuring insulation performance and ease of use.

[0039] like Figure 5-6 As shown, in some embodiments, the coating layer 13 is formed by mixing and coating any combination of PBAT / PLA / PBSAT / PESAT, providing waterproof and stain-resistant functions. The coating layer 13 achieves its waterproof and stain-resistant function through a combination design of biodegradable polymer materials, where PBAT and PLA provide basic barrier properties, and PBSAT and PESAT optimize the mechanical strength and stain resistance of the film layer. This design not only meets the practical requirements of waterproof and stain-resistant packaging for takeout, but also solves environmental problems through the biodegradability of materials, forming a functionally complementary composite structure with the bubble wrap 11 and kraft paper 12.

[0040] like Figure 1-4As shown, in some embodiments, the length, width and height of the bag body 1 are 250mm, 160mm and 300mm respectively. This size setting takes into account the actual use needs, such as meeting the loading needs of different specifications of food in the food delivery industry. It can accommodate a certain number of food boxes, beverages and other items, and is convenient for users to pick up and carry. It also takes into account factors such as material utilization and production costs.

[0041] A method for manufacturing a packaging bag includes: melting and granulating a coating material and then coating it onto a middle layer made of kraft paper 12 to form kraft paper 12 and a coating layer 13; roller coating an inner layer of bubble wrap 11 with starch adhesive and then hot-pressing it with kraft paper 12; and finally cutting, folding, and heat-sealing it to form a packaging bag.

[0042] This manufacturing method achieves the design goals of "environmentally friendly, practical, and easy to produce" for packaging bags through multi-step process collaboration, solving the performance deficiencies and pollution problems of traditional takeaway packaging.

[0043] Example 2

[0044] like Figure 3-4 As shown in Figures 5-6, an embodiment of the present invention provides a packaging bag, which includes a bag body 1. The bag body 1 is composed of an inner bubble wrap 11, a middle kraft paper 12, and an outer coating layer 13. The bubble wrap 11 is bonded to the middle kraft paper 12 with starch adhesive, and the coating layer 13 is coated on the middle kraft paper 12.

[0045] The side of the bag body 1 is provided with crease 2, which is used to fold the bag into a triangular shape.

[0046] The top side of the bag body 1 is integrally formed with a flap 3, and a disposable adhesive tape 4 is fixedly connected to the flap 3 for sealing the bag body 1;

[0047] The bag body 1 has a through handle groove 6.

[0048] The bag body 1 is also composed of an inner layer of bubble wrap 11, an outer layer of kraft paper 12, and a coated film layer 13, providing insulation, load-bearing capacity, and environmental protection. Side creases 2 allow the bag body to be folded into a triangular shape, increasing its flexibility. A disposable adhesive tape 4 on the top flap 3 seals the bag body 1. Unlike Embodiment 1, the bag body 1 has a through-handle groove 6, allowing users to lift the bag and meet different usage needs.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A packaging bag, comprising a bag body (1), characterized in that: The bag body (1) is composed of an inner layer of bubble wrap (11), a middle layer of kraft paper (12) and an outer layer of coating (13); the bubble wrap (11) is bonded to the middle layer of kraft paper (12) with starch adhesive, and the coating (13) is coated on the middle layer of kraft paper (12). The side of the bag (1) is provided with creases (2), and it is folded into a triangular shape through the creases (2); The top side of the bag (1) is integrally formed with a flap (3), and a disposable adhesive tape (4) is fixedly connected to the flap (3) for sealing the bag (1). Two symmetrical lifting ropes (5) are fixedly glued to both sides of the bag body (1).

2. The packaging bag according to claim 1, characterized in that: The length, width and height of the bag (1) are 250mm, 160mm and 300mm respectively.

3. The packaging bag according to claim 1, characterized in that: A through handle groove (6) can also be provided on the bag body (1).

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