Composite waterproof type packing carton

Abstract

The utility model discloses a kind of composite waterproof packing cartons, belong to packing carton technical field, including box body and the box cover of being set to the top of box body, box body is folded into shape by composite paperboard, composite paperboard includes plant fiber contact layer, the outside of plant fiber contact layer is equipped with microporous breathable layer, the outside of microporous breathable layer is equipped with polypropylene waterproof layer, the outside of polypropylene waterproof layer is equipped with reinforced corrugated layer.The composite waterproof packing carton, plant fiber contact layer surface is coated with food-grade nano waterproof coating, can block the liquid of internal article exudation, the polypropylene waterproof layer in middle is built by biaxially oriented polypropylene film, can effectively isolate external water vapor invasion, the sealing rib outside reinforced corrugated layer is formed by polyurethane adhesive, further enhance overall sealing, solve the problem that existing device can only deal with short-term slight damp, meet continuous water vapor or liquid leakage failure.

Description

Technical Field

[0001] This utility model relates to the field of packaging paper box technology, specifically a composite waterproof packaging paper box. Background Technology

[0002] High-quality packing boxes are indispensable for the transportation and storage of goods. Our boxes are made of high-strength corrugated cardboard, resistant to pressure and impact, providing robust protection for various items such as glassware and electronic products. They are scientifically designed, available in various sizes, easy to assemble, and have a smooth surface for labeling and information filling. They are also environmentally friendly, being recyclable. Choosing them means choosing peace of mind and responsibility, ensuring the safe transport and storage of your goods.

[0003] For example, patent CN211919305U discloses a moisture-proof composite cardboard for food packaging, including a cardboard box body. One end of the cardboard box body has first connecting ears bent on both sides, and the other end has a second connecting ear bent. A polyethylene film is laminated to the outer surface of the cardboard box body, and a PP film is laminated to the inner surface of the cardboard box body. A first pressing plate is located inside the cardboard box body and at the bottom edge, close to the polyethylene film. A yellow cardboard is located inside the cardboard box body and at the top edge, close to the PP film. However, existing devices have relatively weak protective performance, only able to cope with brief periods of slight moisture. They are prone to failure when exposed to continuous moisture or liquid leakage, failing to meet the packaging protection needs in complex scenarios. Furthermore, the sealing structure is inconvenient, and the connection between the box body and the lid has poor stability; even slight external impacts or vibrations can cause the lid to detach, affecting the sealing and reliability of the packaging.

[0004] Therefore, in order to solve this problem, we propose a composite waterproof packaging box. Utility Model Content

[0005] The purpose of this utility model is to provide a composite waterproof packaging box to solve the problems mentioned in the background art. The existing devices have weak protective performance when in use, can only cope with short-term slight moisture, and are prone to failure when exposed to continuous water vapor or liquid leakage. They cannot meet the packaging protection needs in complex scenarios. In addition, the sealing structure is inconvenient, the connection between the box body and the lid is unstable, and the lid will fall off when subjected to slight external force or vibration, affecting the sealing and reliability of the packaging.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a composite waterproof packaging box, comprising a box body and a box lid disposed on the top of the box body. The box body is formed by folding composite cardboard. The composite cardboard includes a plant fiber contact layer, a microporous breathable layer outside the plant fiber contact layer, a polypropylene waterproof layer outside the microporous breathable layer, and a reinforced corrugated layer outside the polypropylene waterproof layer.

[0007] Furthermore, the plant fiber contact layer is made of virgin wood pulp fiber, and the surface of the plant fiber contact layer is coated with a food-grade nano-waterproof coating.

[0008] Furthermore, the exterior of the reinforced corrugated layer is provided with sealing ribs, which are formed by polyurethane adhesive.

[0009] Furthermore, the polypropylene waterproof layer is constructed from biaxially oriented polypropylene film, and the microporous breathable layer is constructed from a composite of modified polyvinyl alcohol and cellulose nanocrystals.

[0010] Furthermore, a sealing groove is provided on the box body, and a sealing ring is fixedly connected to the inner wall of the box cover, and the box body and the box cover are sealed together through the sealing groove and the sealing ring.

[0011] Furthermore, a locking groove is provided below the sealing groove on the box body, and a locking block is fixedly connected below the sealing ring on the inner wall of the box cover, and the box body and the box cover are locked together by the locking groove and the locking block.

[0012] Compared with the prior art, the beneficial effects of this utility model are: a composite waterproof packaging box adopts a novel structural design, the specific details of which are as follows:

[0013] (1) The composite waterproof packaging box has a plant fiber contact layer coated with a food-grade nano waterproof coating, which can block liquid leakage from the contents. The middle polypropylene waterproof layer is constructed from biaxially oriented polypropylene film, which can effectively isolate external moisture intrusion. The sealing ribs on the outside of the corrugated layer are formed by polyurethane adhesive, which further enhances the overall sealing performance and avoids the problem that it can only cope with short-term slight dampness and is prone to failure when exposed to continuous moisture or liquid leakage. Even if the box is soaked in rainwater or the contents leak liquid, the multi-layer waterproof structure can ensure that the contents inside the box are not damp and the external environment is not polluted. The plant fiber contact layer is made of virgin wood pulp fiber, and the microporous breathable layer is constructed from modified polyvinyl alcohol and cellulose nanocrystals. These two materials can degrade in a short period of time in the natural environment, reducing the pollution of the environment caused by waterproof packaging. The microporous breathable layer can achieve a certain degree of gas exchange, preventing the contents inside the box from developing odors or deteriorating due to the sealed environment.

[0014] (2) The composite waterproof packaging box is sealed to the box body and the box lid through a sealing groove and a sealing ring. At the same time, it is fixed by a locking groove and a locking block. The dual connection method greatly improves the stability of the connection between the box body and the box lid, and avoids the phenomenon of the box lid falling off when subjected to slight external force or vibration. It ensures the sealing and reliability of the packaging. When the box lid is subjected to bumps and collisions during transportation, it will not easily separate from the box body and can continuously protect the contents.

[0015] Furthermore, the reinforced corrugated layer, through its optimized structural design, significantly improves the overall mechanical properties of the cardboard box. Its unique corrugated structure can effectively disperse and buffer external pressure and impact. Whether it is the bumps and collisions encountered during transportation or the stacking and squeezing during storage, this layer can provide a solid and reliable protective barrier for the contents. It is especially suitable for the packaging needs of fragile items such as glass products and electronic products, and fully meets the high standard requirements for packaging protection in complex scenarios. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the internal structure of the box body and lid of this utility model;

[0019] Figure 4 This is an exploded view of the internal structure of the box body and lid of this utility model;

[0020] Figure 5 This is a three-dimensional schematic diagram of the box body of this utility model;

[0021] Figure 6 This is a three-dimensional cross-sectional view of the box lid of this utility model.

[0022] In the diagram: 1. Box body; 11. Sealing groove; 12. Locking groove; 13. Plant fiber contact layer; 131. Nano waterproof coating; 14. Microporous breathable layer; 15. Polypropylene waterproof layer; 16. Reinforced corrugated layer; 161. Sealing rib; 2. Box lid; 21. Sealing ring; 22. Locking block. Detailed Implementation

[0023] 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.

[0024] This utility model provides the following technical solution: a composite waterproof packaging box.

[0025] Example 1: A composite waterproof packaging box, through the combination of a plant fiber contact layer 13, a microporous breathable layer 14, a polypropylene waterproof layer 15, and a reinforced corrugated layer 16, enables the box to meet usage standards. The plant fiber contact layer 13 and the microporous breathable layer 14 can degrade in a short period of time under natural conditions, avoiding environmental pollution problems caused by waterproof packaging. The design of the reinforced corrugated layer 16 and sealing ribs 161 enhances the compressive strength of the box, preventing the problem that the protective performance is relatively weak and can only cope with short-term slight moisture. It is very easy to fail when exposed to continuous water vapor or liquid leakage, and cannot meet the packaging protection needs in complex scenarios.

[0026] like Figure 1 - Figure 4As shown, a composite waterproof packaging box includes a box body 1 and a lid 2 disposed on the top of the box body 1. The box body 1 is formed by folding composite cardboard, which includes a plant fiber contact layer 13. The plant fiber contact layer 13 is made of virgin wood pulp fiber, and its surface is coated with a food-grade nano-waterproof coating 131. As the innermost layer that directly contacts the internal items, the food-grade nano-waterproof coating 131 on the surface plays its role first, effectively blocking liquids that may seep out from the items themselves. At the same time, the virgin wood pulp material ensures the safety of contact with the items. The plant fiber contact layer 13... An external microporous breathable layer 14 is provided, which is constructed from a composite of modified polyvinyl alcohol and cellulose nanocrystals. While assisting in blocking some liquids, it also allows for moderate gas exchange, preventing odors from developing inside the box due to its sealed environment, thus balancing protection and breathability. Outside the microporous breathable layer 14 is a polypropylene waterproof layer 15, constructed from biaxially oriented polypropylene film. This serves as the primary waterproof barrier, strongly blocking the intrusion of external moisture and large amounts of liquid water, forming crucial protection. Outside the polypropylene waterproof layer 15 is a reinforced corrugated layer 16, further reinforcing... The corrugated layer 16 not only provides solid structural support for the entire carton, significantly enhancing its compression and impact resistance, but its external sealing ribs 161, formed by polyurethane adhesive, further seal the gaps between layers, improving overall airtightness. In subsequent transportation and storage, thanks to its excellent structural strength, it can directly withstand external squeezing pressure and impact forces, preventing damage to items caused by external forces. Both the carton body 1 and the lid 2 are made of composite cardboard folded into shape, their composite structure forming a tightly coordinated functional system from the inside out. The four layers work together to ensure... A comprehensive protection system is built from the inside out, which not only ensures waterproof effect, but also takes into account the structural strength and environmental protection and breathability requirements. The plant fiber contact layer 13 has a nano waterproof coating 131, polypropylene waterproof layer 15 and other multi-layer waterproof structures work together to completely isolate the penetration of internal and external liquids and water vapor. In addition, the stable connection and sealing system formed by the locking groove 12 and locking block 22, sealing groove 11 and sealing ring 21 can maintain a good sealing state even if the cardboard box is subjected to external impact or vibration. In the end, it can achieve all-round reliable protection for the items in the box from the sealing to the circulation process.

[0027] Example 2: Unlike Example 1, the box body 1 and the lid 2 are fixedly installed by the locking groove 12 and the locking block 22, and the box body 1 and the lid 2 are sealed by the U-shaped sealing groove 11 and the sealing ring 21. This prevents the packaging structure from being inconvenient and the connection between the box body 1 and the lid 2 from being unstable. The lid 2 will fall off if it is hit or vibrated by a slight external force, which will affect the sealing and reliability of the packaging.

[0028] like Figure 5 - Figure 6As shown, a sealing groove 11 is provided on the box body 1, and a sealing ring 21 is fixedly connected to the inner wall of the box lid 2. The box body 1 and the box lid 2 are sealed together through the sealing groove 11 and the sealing ring 21. When the box lid 2 is closed on the box body 1, the sealing ring 21 will fit tightly with the sealing groove 11. This not only prevents moisture, dust and other impurities from the external environment from entering the box, but also prevents the odor of the contents from escaping or liquid from leaking out, thus strengthening the tightness of the seal. The box body 1 also has a locking mechanism. The inner wall of the lid 2 is fixedly connected to the groove 12 and the locking block 22. The two can be locked together by the locking block 22 being inserted into the locking groove 12. When sealing the items, the locking block 22 will be precisely inserted into the locking groove 12 during the process of closing the lid 2 onto the box body 1. The locking block 22 will be initially fixed by physical fitting, which restricts the displacement of the lid 2 from the structure and effectively prevents it from loosening due to slight touch or shaking. On the basis of sealing, the stability of the sealing is further guaranteed, and finally the dual guarantee of fixing and sealing is achieved.

[0029] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] 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 composite waterproof packaging box, comprising a box body (1) and a box lid (2) disposed on the top of the box body (1), characterized in that: The box body (1) and the lid (2) are both folded from composite paperboard. The composite paperboard includes a plant fiber contact layer (13), a microporous breathable layer (14) is provided on the outside of the plant fiber contact layer (13), a polypropylene waterproof layer (15) is provided on the outside of the microporous breathable layer (14), and a reinforced corrugated layer (16) is provided on the outside of the polypropylene waterproof layer (15).

2. The composite waterproof packaging box according to claim 1, characterized in that: The plant fiber contact layer (13) is made of virgin wood pulp fiber, and the surface of the plant fiber contact layer (13) is coated with a food-grade nano waterproof coating (131).

3. The composite waterproof packaging box according to claim 1, characterized in that: The reinforced corrugated layer (16) is provided with sealing ribs (161) on the outside, and the sealing ribs (161) are formed by polyurethane adhesive.

4. A composite waterproof packaging box according to claim 1, characterized in that: The polypropylene waterproof layer (15) is constructed from a biaxially oriented polypropylene film, and the microporous breathable layer (14) is constructed from a composite of modified polyvinyl alcohol and cellulose nanocrystals.

5. A composite waterproof packaging box according to claim 1, characterized in that: The box body (1) is provided with a sealing groove (11), and a sealing ring (21) is fixedly connected to the inner wall of the box cover (2). The box body (1) and the box cover (2) are sealed together by the sealing groove (11) and the sealing ring (21).

6. A composite waterproof packaging box according to claim 1, characterized in that: A locking groove (12) is provided below the sealing groove (11) on the box body (1), and a locking block (22) is fixedly connected below the sealing ring (21) on the inner wall of the box cover (2), and the box body (1) and the box cover (2) are locked together by the locking groove (12) and the locking block (22).

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