Paper box with composite structure and good tear resistance
By using composite structural design and biodegradable materials, the shortcomings of cardboard boxes in terms of tear resistance and environmental friendliness have been solved, achieving high-efficiency tear and puncture resistance, and providing real-time monitoring functions, thereby reducing carbon emissions throughout the entire life cycle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO HONGTAI PACKAGING NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-04-17
AI Technical Summary
Existing cardboard boxes are inadequate in terms of tear resistance and environmental friendliness, especially at the edges and seams where they are easily torn. They also struggle to balance cost and recyclability, making traditional cardboard boxes insufficient for protecting high-value items.
The design employs a composite structure, including an inner tear-resistant layer, an outer puncture-resistant layer, an inner supporting cardboard, and a grooved structure. It combines biodegradable materials and hot melt adhesive dot matrix composite technology to enhance the tear and puncture resistance of the cardboard box, and enables real-time monitoring through humidity-changing color cards and RFID tags.
It significantly improves the tear and puncture resistance of cardboard boxes, reduces the risk of delamination in humid environments, enhances air permeability and structural strength, achieves environmental friendliness and real-time monitoring functions, and reduces carbon emissions throughout the entire life cycle.
Smart Images
Figure CN224131600U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of paper box technology, specifically to a paper box with a composite structure and good tear resistance. Background Technology
[0002] As is well known, most commercially available cardboard boxes currently use single- or double-layer corrugated cardboard as their main material. Their tear resistance mainly depends on the paper weight and the corrugation design of the corrugated core paper. For example, the tear strength of corrugated cardboard boxes at the edges and corners is only 80-120N, which is insufficient to meet the protection requirements of high-value items such as precision instruments. Conventional cardboard boxes rely on corrugated structures or increased paper weight to improve strength, leading to increased costs and difficulty in achieving environmental protection. In particular, the edges and seams are easily torn by external forces. If the bottom of the box comes into direct contact with sharp objects, single-layer cardboard is easily punctured. Existing technologies mostly use plastic patches for protection, but this presents difficulties in recycling. Therefore, it is necessary to propose solutions to this technical problem. Utility Model Content
[0003] (a) Technical problems to be solved
[0004] To address the shortcomings of existing technologies, this utility model provides a paper box with a composite structure and good tear resistance.
[0005] (II) Technical Solution
[0006] To achieve the above objectives, this utility model provides the following technical solution: a paper box with a composite structure and good tear resistance, comprising a paper box body, wherein the inside of the paper box body is provided with a tear-resistant layer, the tear-resistant layer is bonded to the paper box body by a hot melt adhesive dot matrix, the bottom outer side of the paper box body is provided with a puncture-resistant layer, at least one groove is provided on the inner side of the paper box body, a supporting cardboard is provided on the groove, a groove is provided on the inner side of the paper box body, a card slot is provided at the bottom of the groove, and a humidity-changing color card and an anti-theft sticker are provided on the groove.
[0007] Furthermore, an improvement of this utility model is that the supporting cardboard is a wax-impregnated cardboard.
[0008] Furthermore, the present invention is improved by providing a reinforcing cardboard on the groove, wherein the reinforcing cardboard is a honeycomb structure cardboard.
[0009] Furthermore, the present invention is improved in that the puncture-resistant layer is a bamboo pulp fiber layer.
[0010] Furthermore, the present invention is improved by providing an elastic rubber layer at the top of the groove.
[0011] Furthermore, an improvement of this utility model is that the elastic rubber layer is made of a high and low temperature resistant rubber material.
[0012] Furthermore, an improvement of this invention is that the tear-resistant layer is a biodegradable polylactic acid fiber mesh.
[0013] (III) Beneficial Effects
[0014] Compared with the prior art, this utility model provides a paper box with good tear resistance due to its composite structure, and has the following beneficial effects:
[0015] This composite-structured, tear-resistant cardboard box features a biodegradable polylactic acid fiber mesh tear-resistant layer inside the box body. This effectively disperses localized stress and blocks tear propagation paths, enhancing lateral tear strength. The hot-melt adhesive dot matrix composite process avoids full adhesive coverage, strengthening the structure while improving breathability and reducing the risk of delamination in humid environments. The puncture-resistant layer, made of bamboo pulp fiber, utilizes the high aspect ratio of the fibers to form an interlaced barrier. The addition of silicone enhances elastic deformation capabilities, significantly increasing puncture resistance. The supporting cardboard, made of waxed paperboard, seals the capillary pores of the paper fibers, maintaining structural strength even in high humidity environments. Combined with a honeycomb structure reinforcing the cardboard, this forms a composite protective system, significantly improving the bending stiffness and load-bearing capacity of the box bottom. A cobalt chloride silicone strip embedded in the groove displays humidity changes during transportation, providing a visual warning of abnormal temperature and humidity. An RFID tag anti-theft patch, fixed in a slot, provides electronic identification and anti-tampering functions, effectively preventing product theft. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ;
[0017] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ;
[0018] Figure 3 This is a front half-sectional view of the structure of this utility model;
[0019] Figure 4 This utility model Figure 1 A magnified partial sectional view of the main body of the paper box.
[0020] In the picture: 1. Cardboard box body; 2. Tear-resistant layer; 3. Puncture-resistant layer; 4. Supporting cardboard; 5. Groove; 6. Moisture-sensitive color card; 7. Anti-theft sticker; 8. Reinforcing cardboard; 9. Elastic rubber layer. Detailed Implementation
[0021] 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.
[0022] Please see Figure 1-4 This utility model relates to a paper box with a composite structure and good tear resistance, comprising a paper box body 1, an internal tear-resistant layer 2, and a puncture-resistant layer 3 on the outer bottom of the paper box body 1. At least one groove is formed on the inner side of the paper box body 1, and a supporting cardboard 4 is provided on the groove. A recess 5 is formed on the inner side of the paper box body 1, and a slot is formed at the bottom of the recess 5. A humidity-changing color card 6 and an anti-theft sticker 7 are provided on the recess 5. The tear-resistant layer 2 is bonded to the paper box body 1 with hot melt adhesive to enhance the structure. The structure features enhanced transverse tear resistance, dot-matrix bonding to avoid full adhesive coverage, improved breathability to reduce the risk of delamination in humid environments, and a puncture-resistant layer 3 to increase puncture resistance. Supporting cardboard 4 further enhances the load-bearing strength of the structure. A standardized groove 5 allows for the simultaneous insertion of a humidity-changing card 6 and an anti-theft sticker 7, which rest against the groove for real-time monitoring of transport status. The shape of the cardboard box shown in the attached diagram can be customized according to user needs, including bending and size, and can be any packaging box shape. The puncture-resistant layer can also be customized based on user requirements.
[0023] In this design, the supporting cardboard 4 is a wax-impregnated cardboard, the groove 5 is further provided with a reinforcing cardboard 8, the reinforcing cardboard 8 is a honeycomb structure cardboard, the puncture-resistant layer 3 is a bamboo pulp fiber layer, the top of the groove 5 is provided with an elastic rubber layer 9, the elastic rubber layer 9 is a high and low temperature resistant rubber material, and the tear-resistant layer 2 is a biodegradable polylactic acid fiber mesh. The biodegradable polylactic acid PLA fiber mesh is woven from PLA fibers with a diameter of 0.05-0.1mm into a mesh structure with a mesh density of 20-30 meshes, and is composited with the cardboard box body 1 by hot melt adhesive dot matrix. Dispersing local stress, blocking tear propagation paths, and improving lateral tear resistance, the puncture-resistant layer 3 is a bamboo pulp fiber layer. The high aspect ratio of bamboo fibers forms an interlaced barrier. Silicone is added to enhance elastic deformation capabilities. The reinforced cardboard 8, a honeycomb structure cardboard, forms a composite protection system with the puncture-resistant layer 3, improving the bending stiffness of the box bottom. The waxed cardboard seals the capillary pores of the paper fibers, ensuring structural strength even under high humidity conditions. The high and low temperature resistant elastic rubber layer 9 is suitable for both high and low temperature environments, ensuring elastic support for the humidity-changing card 6 and the anti-theft sticker 7, ensuring that the humidity-changing card 6 and the anti-theft sticker 7 are stably inserted into the card slot. The humidity-changing card 6 is a cobalt chloride silicone strip, and the anti-theft sticker 7 is an RFID tag. The proportion of biodegradable components such as PLA fiber mesh, bamboo pulp layer, and honeycomb cardboard is ≥95%. Compared with traditional plastic-reinforced cardboard boxes, the carbon emissions throughout the entire life cycle are reduced by 40%, and the tear resistance, puncture resistance, and load-bearing capacity are all at the industry-leading level.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A carton having a composite structure with good tear resistance, comprising a carton body (1), characterized in that, The inside of the paper box body (1) is provided with a tear-resistant layer (2), which is bonded to the paper box body (1) by a hot melt adhesive dot matrix. The bottom of the outer side of the paper box body (1) is provided with a puncture-resistant layer (3). At least one groove is provided on the inner side of the paper box body (1), and a supporting cardboard (4) is provided on the groove. A groove (5) is provided on the inner side of the paper box body (1), and a card slot is provided at the bottom of the groove (5). A humidity-changing color card (6) and an anti-theft sticker (7) are provided on the groove (5).
2. The cart according to claim 1, wherein The supporting paperboard (4) is a wax-impregnated paperboard.
3. The cart according to claim 1, wherein The groove (5) is also provided with a reinforcing cardboard (8), which is a honeycomb structure cardboard.
4. The cart according to claim 1, wherein The puncture-resistant layer (3) is a bamboo pulp fiber layer.
5. The paper box with good tear resistance and composite structure according to claim 1, characterized in that, The top of the groove (5) is provided with an elastic rubber layer (9).
6. The cart according to claim 5, wherein The elastic rubber layer (9) is made of high and low temperature resistant rubber material.
7. The cart according to claim 1, wherein The tear-resistant layer (2) is a biodegradable polylactic acid fiber web.