Novel degradable environment-friendly envelope bag
By employing a multi-layered structure design consisting of kraft paper, bubble wrap, and PBAT film, combined with adhesive tape and wax coating, the problem of non-degradability in traditional envelopes is solved, achieving both degradability and cushioning protection in environmentally friendly envelopes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2026-06-19
AI Technical Summary
Traditional bubble envelopes are non-biodegradable, causing serious environmental pollution and producing harmful substances during incineration.
Employing a multi-layered structure consisting of kraft paper, bubble wrap, and PBAT film, combined with double-sided cotton paper tape and a plant-based wax coating, this envelops a biodegradable bag that provides excellent cushioning and sealing.
This technology enables the envelopes to be biodegradable, reducing environmental pollution, improving the protection of goods during transportation, and reducing the risk of gaps in the seal.
Smart Images

Figure CN224376394U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of envelope technology, specifically a novel biodegradable and environmentally friendly envelope. Background Technology
[0002] In today's booming logistics and express delivery industry, the use of packaging materials has seen explosive growth. Bubble envelopes, as an extremely common packaging material, occupy an important position in the field of goods transportation and protection due to their unique structure and performance. Traditional bubble envelopes are usually composed of an outer material and an inner bubble wrap. The inner bubble wrap provides good cushioning, effectively preventing items from being damaged by vibration, squeezing, or collision during transportation. However, since bubble envelopes are mostly made of non-degradable plastics, with the continuous increase in logistics volume, a large number of used bubble envelopes are discarded and piled up in landfills. They not only occupy valuable land resources, but may also release harmful chemicals during degradation, polluting soil and water bodies. Even if some bubble envelopes are incinerated, they will produce a large amount of harmful smoke and toxic gases, seriously polluting the atmospheric environment and placing a heavy burden on the ecosystem. Utility Model Content
[0003] The purpose of this utility model is to provide a new type of biodegradable and environmentally friendly envelope bag, which has the advantages of being biodegradable and effectively improving the overall environmental protection effect.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel biodegradable and environmentally friendly envelope bag, comprising a bag body, a kraft paper sealing cap fixedly connected to the top of the bag body, kraft paper edge sealing caps fixedly connected to both sides of the kraft paper sealing cap, and double-sided cotton paper tape pasted between the back of the kraft paper sealing cap and the back of the kraft paper edge sealing cap. The bag body comprises a kraft paper layer, a bubble wrap layer, and a PBAT film layer.
[0005] As a preferred embodiment, the inner surface of the kraft paper layer is fixedly connected to the outer surface of the bubble wrap layer, and the inner surface of the bubble wrap layer is fixedly connected to the outer surface of the PBAT film layer.
[0006] As a preferred embodiment, release paper is adhered to the back of the double-sided cotton paper tape.
[0007] As a preferred embodiment, the surface of the kraft paper sealing cap is provided with tear marks for opening and closing.
[0008] As a preferred embodiment, the outer surface of the bag body, the front surface of the kraft paper sealing cap, and the front surface of the kraft paper edge sealing cap are all coated with a plant wax coating.
[0009] As a preferred embodiment, the thickness of the kraft paper sealing cap is the same as the thickness of the kraft paper edge sealing cap.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0011] This invention utilizes double-sided cotton paper tape to facilitate the attachment of kraft paper sealing caps and edge caps to the bag body for sealing. After the kraft paper sealing cap is attached to the upper back of the bag during folding, the edge cap can be folded and attached to the upper front of the bag, effectively preventing gaps on both sides from affecting the sealing effect. Furthermore, the combination of kraft paper, bubble wrap, and PBAT film layers creates multi-layered protection inside the bag. The bubble wrap layer provides excellent cushioning around the items placed inside, reducing the likelihood of damage during transport. Since all materials used in this envelope are biodegradable, unlike traditional non-biodegradable bubble envelopes, this envelope degrades naturally after disposal, effectively reducing environmental pollution and significantly improving environmental protection. Attached Figure Description
[0012] Figure 1 This is a perspective view of the present utility model;
[0013] Figure 2 This is a schematic diagram of the rear structure of the present invention;
[0014] Figure 3 This is a schematic diagram of the bag structure of this utility model;
[0015] Figure 4 This utility model Figure 2 A magnified view of section A in the image.
[0016] In the picture: 1. Bag body; 11. Kraft paper layer; 12. Bubble wrap layer; 13. PBAT film layer; 2. Kraft paper sealing cap; 3. Kraft paper edge sealing cap; 4. Tear marks from opening; 5. Release paper; 6. Double-sided cotton paper tape. Detailed Implementation
[0017] 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.
[0018] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0019] The components of this application, such as the bag body 1, kraft paper layer 11, bubble wrap layer 12, PBAT film layer 13, kraft paper sealing cap 2, kraft paper edge sealing cap 3, opening tear mark 4, release paper 5, and double-sided cotton paper tape 6, are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods.
[0020] Example 1:
[0021] Please see Figures 1-4 As shown, this utility model provides a novel biodegradable and environmentally friendly envelope bag, including a bag body 1. A kraft paper sealing cap 2 is fixedly connected to the top of the bag body 1. Kraft paper edge sealing caps 3 are fixedly connected to both sides of the kraft paper sealing cap 2. Double-sided cotton paper tape 6 is pasted between the back of the kraft paper sealing cap 2 and the back of the kraft paper edge sealing cap 3. The bag body 1 includes a kraft paper layer 11, a bubble wrap layer 12, and a PBAT film layer 13.
[0022] In this technical solution, the use of double-sided cotton paper tape 6 facilitates the application of kraft paper sealing cap 2 and kraft paper edge sealing cap 3 to the bag body 1, achieving a sealing effect. After the kraft paper sealing cap 2 is folded and adhered to the upper back of the bag body 1, the kraft paper edge sealing cap 3 can be folded and adhered to the upper front of the bag body 1, effectively preventing gaps on both sides from affecting the sealing effect. Simultaneously, the kraft paper layer 11, bubble wrap layer 12, and PBAT film layer 13 create multi-layered protection inside the bag body 1. The bubble wrap layer 12 provides excellent cushioning protection around the items placed inside the bag body 1, reducing the likelihood of damage during transportation. Furthermore, since the materials used in this envelope are biodegradable, compared to traditional non-biodegradable bubble envelopes, this envelope can naturally degrade after disposal, effectively reducing environmental pollution and significantly improving environmental protection.
[0023] Example 2:
[0024] Based on Embodiment 1, this utility model is as follows: Figures 1-4As shown, the inner surface of the kraft paper layer 11 is fixedly connected to the outer surface of the bubble wrap layer 12, the inner surface of the bubble wrap layer 12 is fixedly connected to the outer surface of the PBAT film layer 13, release paper 5 is pasted on the back of the double-sided cotton paper tape 6, the surface of the kraft paper sealing cap 2 is provided with opening tear marks 4, the outer surface of the bag body 1, the front surface of the kraft paper sealing cap 2 and the front surface of the kraft paper edge sealing cap 3 are all coated with a plant wax coating, and the thickness of the kraft paper sealing cap 2 is the same as the thickness of the kraft paper edge sealing cap 3.
[0025] In this technical solution, the release paper 5 protects the adhesive side of the double-sided cotton paper tape 6 when not in use. The tear 4 makes it easy for personnel to open the kraft paper sealing cap 2. The plant wax coating provides good waterproof protection on the surfaces of the bag body 1, the kraft paper sealing cap 2 and the kraft paper edge sealing cap 3, thus improving the overall waterproof effect.
[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. A novel biodegradable and environmentally friendly envelope bag, comprising a bag body (1), characterized in that: The top of the bag body (1) is fixedly connected to a kraft paper sealing cap (2), and kraft paper edge sealing caps (3) are fixedly connected to both sides of the kraft paper sealing cap (2). Double-sided cotton paper tape (6) is pasted between the back of the kraft paper sealing cap (2) and the back of the kraft paper edge sealing cap (3). The bag body (1) includes a kraft paper layer (11), a bubble wrap layer (12), and a PBAT film layer (13).
2. The novel biodegradable and environmentally friendly envelope bag according to claim 1, characterized in that: The inner surface of the kraft paper layer (11) is fixedly connected to the outer surface of the bubble paper layer (12), and the inner surface of the bubble paper layer (12) is fixedly connected to the outer surface of the PBAT film layer (13).
3. The novel biodegradable and environmentally friendly envelope bag according to claim 1, characterized in that: Release paper (5) is pasted on the back of the double-sided cotton paper tape (6).
4. The novel biodegradable and environmentally friendly envelope bag according to claim 1, characterized in that: The surface of the kraft paper sealing cap (2) is provided with opening tear marks (4).
5. A novel biodegradable and environmentally friendly envelope bag according to claim 1, characterized in that: The outer surface of the bag body (1), the front surface of the kraft paper sealing cap (2), and the front surface of the kraft paper edge sealing cap (3) are all coated with a plant wax coating.
6. A novel biodegradable and environmentally friendly envelope bag according to claim 1, characterized in that: The thickness of the kraft paper sealing cap (2) is the same as the thickness of the kraft paper edge sealing cap (3).