Flame-retardant corrugated board

Abstract

The utility model relates to a kind of fire -retardant corrugated paperboard, comprising: corrugated paper base layer, the two sides of corrugated paper base layer are bonded with fire -retardant composite fiber board, fire -retardant composite fiber board side away from corrugated paper base layer is bonded with fire -retardant layer, fire -retardant layer side away from fire -retardant composite fiber board is bonded with protective layer, protective layer side away from fire -retardant layer is coated with waterproof moisture-proof coating, protective layer inside is installed with flow support mechanism, flow support mechanism includes flow subassembly and support subassembly, flow subassembly is used to ventilate and block outside water source to enter, support subassembly is used to improve the structural strength at flow subassembly.The utility model has the beneficial effects that: effectively increase the moisture-proof and fire -retardant performance of corrugated paperboard, reduce the hidden danger of fire, further increase practicability.

Description

Technical Field

[0001] This utility model relates to the field of corrugated cardboard technology, specifically to a flame-retardant corrugated cardboard. Background Technology

[0002] Corrugated cardboard has corrugated waves arranged side-by-side, supporting each other to form a triangular structure, which provides good mechanical strength and can withstand a certain amount of pressure on a flat surface. It can be made into various shapes and sizes of pads or containers, and is less affected by temperature, offering good light-blocking properties. However, most corrugated cardboard used in applications employs a three-layer corrugated cardboard structure design. In actual impact situations, it is highly susceptible to damage, as its end faces lack good impact resistance. Furthermore, existing corrugated cardboard lacks a rubber cushioning structure, meaning that the entire corrugated cardboard system lacks overall cushioning performance during installation.

[0003] In the prior art, Chinese Patent No. CN220335592U discloses a high-cushioning corrugated cardboard, comprising a first corrugated cardboard, a second corrugated cardboard fixedly connected to each of the upper and lower side walls of the first corrugated cardboard, a third corrugated cardboard fixedly connected to each of the two second corrugated cardboards on opposite side walls, and reinforcing sleeves symmetrically fixedly connected to the side walls of the first corrugated cardboard, with the second and third corrugated cardboards fixedly connected to the side walls of the two reinforcing sleeves facing each other. While this increases the cushioning performance of the corrugated cardboard, making it less prone to damage upon impact, it lacks flame-retardant properties, increasing the risk of fire during actual use or transportation, thus affecting the overall practicality of the cardboard. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a flame-retardant corrugated cardboard, which effectively increases the moisture-proof and flame-retardant properties of the corrugated cardboard, reduces the risk of fire, and further increases its practicality.

[0005] This utility model provides the following technical solution: a flame-retardant corrugated cardboard, comprising: a corrugated paper base layer, flame-retardant composite fiberboard bonded to both sides of the corrugated paper base layer, a fire-retardant layer bonded to the side of the fire-retardant composite fiberboard away from the corrugated paper base layer, a protective layer bonded to the side of the fire-retardant layer away from the fire-retardant composite fiberboard, a waterproof and moisture-proof coating applied to the side of the protective layer away from the fire-retardant layer, and a flow support mechanism installed inside the protective layer. The flow support mechanism includes a flow component and a support component. The flow component is used to allow air to pass through and prevent external water from entering, and the support component is used to improve the structural strength at the flow component.

[0006] As a preferred embodiment of this utility model, the support component includes multiple sets of protective sleeves embedded and installed inside the protective layer. The protective sleeves are made of silicone, and multiple sets of thick wallpaper tubes are arranged and embedded inside the protective sleeves.

[0007] As a preferred embodiment of this utility model, the circulation component includes a first through hole opened inside the protective layer at both ends located on both sides of the protective sleeve, and a second through hole opened at both ends inside the protective layer corresponding to the first through hole.

[0008] As a preferred embodiment of this utility model, a third through hole is provided inside the fireproof and flame-retardant layer and the flame-retardant composite fiberboard corresponding to the first through hole. A waterproof layer is bonded to one end of the inner wall of the first through hole, the second through hole, and the third through hole. The waterproof layer is a halogen-free flame-retardant PET film.

[0009] As a preferred embodiment of this utility model, multiple sets of rubber buffer strips are arranged and installed on the outer surface of the protective layer, and the positions of the first through holes of the rubber buffer strips are staggered.

[0010] As a preferred embodiment of this utility model, the fire-retardant layer is aramid fiber paper impregnated with a phosphorus-nitrogen intumescent flame retardant, and the protective layer is glass fiber reinforced paper.

[0011] As a preferred embodiment of this invention, the waterproof and moisture-proof coating is a polyurea coating.

[0012] The beneficial effects of this utility model are: by allowing air to pass through the circulation component and blocking external water sources from entering, and by increasing the structural strength of the circulation component through the support component, the moisture-proof and flame-retardant properties of the corrugated cardboard are effectively increased, the risk of fire is reduced, and the practicality is further enhanced. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a partial three-dimensional structural diagram of the protective layer of this utility model;

[0015] Figure 3 This is a partial cross-sectional view of the circulation support mechanism of this utility model;

[0016] In the diagram: 1. Corrugated paper base layer; 2. Flame-retardant composite fiberboard; 3. Fireproof and flame-retardant layer; 4. Protective layer; 5. Waterproof and moisture-proof coating; 6. Protective sleeve; 7. Thick wallpaper tube; 8. First through hole; 9. Waterproof layer; 10. Rubber buffer strip. Detailed Implementation

[0017] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Example:

[0019] like Figures 1 to 3 As shown, a flame-retardant corrugated cardboard includes: a corrugated paper base 1, flame-retardant composite fiberboard 2 bonded to both sides of the corrugated paper base 1, a fire-retardant layer 3 bonded to the side of the fire-retardant composite fiberboard 2 away from the corrugated paper base 1, a protective layer 4 bonded to the side of the fire-retardant layer 3 away from the fire-retardant composite fiberboard 2, and a waterproof and moisture-proof coating 5 coated on the side of the protective layer 4 away from the fire-retardant layer 3. A flow support mechanism is installed inside the protective layer 4, comprising a flow component and a support component. The flow component allows air to pass through while preventing external water from entering, and the support component enhances the structural strength of the flow component. In use, this device allows air to pass through the flow component while preventing external water from entering, and the support component enhances the structural strength of the flow component, effectively increasing the moisture-proof and flame-retardant properties of the corrugated cardboard, reducing the risk of fire, and further increasing its practicality.

[0020] In this embodiment, the fire-retardant layer 3 is aramid fiber paper impregnated with a phosphorus-nitrogen intumescent flame retardant, and the protective layer 4 is glass fiber reinforced paper. First, flame-retardant composite fiberboard 2 is bonded to both sides of the corrugated paper base layer 1 to initially construct a flame-retardant framework, providing basic flame-retardant capability for the corrugated cardboard. Based on this, the fire-retardant layer 3 uses aramid fiber paper impregnated with a phosphorus-nitrogen intumescent flame retardant. When exposed to a fire source, the phosphorus-nitrogen intumescent flame retardant undergoes decomposition and other reactions, rapidly forming a heat-insulating and oxygen-barrier charred layer, effectively preventing the spread of fire and greatly improving the overall flame-retardant effect of the corrugated cardboard.

[0021] In this embodiment, the support component includes multiple sets of protective sleeves 6 embedded inside the protective layer 4. The protective sleeves 6 are made of silicone. Multiple sets of thick wallpaper tubes 7 are embedded inside the protective sleeves 6. The waterproof and moisture-proof coating 5 is a polyurea coating. The flow component includes first through holes 8 located at both ends of the protective sleeves 6 inside the protective layer 4. Second through holes are provided at both ends of the protective layer 4 corresponding to the first through holes 8. A waterproof layer 9 is adhered to one end of the inner wall of the first through hole 8, the second through hole, and the third through hole. Then, the polyurea coating coated on the outside of the protective layer 4 serves as the waterproof and moisture-proof coating 5 and is cured. A dense, continuous, and resilient film is then formed, effectively blocking external moisture intrusion. In humid environments or when exposed to rain, it prevents moisture from penetrating into the corrugated cardboard, protecting the internal structure from moisture damage. The halogen-free flame-retardant PET film waterproof layer 9, bonded to the inner walls of the first, second, and third through holes in the flow assembly, ensures breathability while preventing moisture from entering the corrugated cardboard through these pores, further enhancing the waterproof and moisture-proof effect. In the support assembly, the silicone protective sleeve 6 is elastic and cushioning, better securing and protecting the internal thick wallpaper tubes 7. The thick wallpaper tubes 7 are arranged and embedded within the protective sleeve 6. When the corrugated cardboard is subjected to external pressure, the thick wallpaper tubes 7 can evenly distribute the pressure, enhancing the compressive strength of the protective layer 4 in the area near the flow assembly, preventing deformation or cracking of the protective layer 4 due to excessive local pressure, and ensuring the overall structural stability of the corrugated cardboard.

[0022] In this embodiment, a third through hole is provided inside the fire-retardant layer 3 and the flame-retardant composite fiberboard 2 at the corresponding position of the first through hole 8. The waterproof layer 9 is a halogen-free flame-retardant PET film. Furthermore, the corrugated paper base layer 1, together with the flame-retardant composite fiberboard 2, the fire-retardant layer 3, and the protective layer 4 on both sides, constitute a tight multi-layer structure, which synergistically improves the mechanical properties of the corrugated cardboard, such as compressive strength and bending strength, in all directions, enabling it to withstand the pressure of heavier items and various external impacts during transportation. The circulation component forms a through-ventilation channel by opening the first through hole 8 and the second through hole inside the protective layer 4, and opening the third through hole at the corresponding position inside the fire-retardant layer 3 and the flame-retardant composite fiberboard 2. These channels allow air to circulate inside the packaging, which helps to reduce the humidity and temperature inside the corrugated cardboard, prevents internal mold growth due to heat and moisture, increases its service life, and achieves a good balance between breathability and waterproofing.

[0023] In this embodiment, multiple sets of rubber buffer strips 10 are arranged on the outer surface of the protective layer 4. The rubber buffer strips 10 are staggered with the positions of the first through holes 8. Furthermore, the rubber buffer strips 10 arranged on the outer surface of the protective layer 4 are staggered with the first through holes 8. When the corrugated cardboard is impacted by external forces, the rubber buffer strips 10 can effectively buffer and absorb impact energy, reduce the damage of impact force to the internal structure of the corrugated cardboard, and improve the impact resistance of the corrugated cardboard.

[0024] Implementation plan: Flame-retardant composite fiberboard 2 is bonded to both sides of the corrugated paper base layer 1 to initially construct a flame-retardant frame and provide basic flame-retardant capability for the corrugated paperboard. Based on this, the fire-retardant layer 3 uses aramid fiber paper impregnated with phosphorus-nitrogen intumescent flame retardant. When exposed to a fire source, the phosphorus-nitrogen intumescent flame retardant undergoes decomposition and other reactions, quickly forming a heat-insulating and oxygen-barrier carbonized layer, effectively preventing the spread of fire and greatly improving the overall flame-retardant effect of the corrugated cardboard. The polyurea coating on the outer side of the protective layer 4 serves as a waterproof and moisture-proof coating 5. After curing, it forms a dense, continuous, and tough film that can effectively block external moisture intrusion. In humid environments or when exposed to rain, it prevents moisture from penetrating into the interior of the corrugated cardboard, protecting the internal structure from moisture damage. The halogen-free flame-retardant PET film waterproof layer 9, which is bonded to the inner walls of the first through hole 8, the second through hole, and the third through hole in the flow component, ensures breathability while preventing moisture from entering the interior of the corrugated cardboard through these holes, further enhancing the waterproof and moisture-proof effect. In the support component, the silicone protective sleeve 6 has elasticity and cushioning, which can better fix and protect the internal thick wallpaper tube 7. Thick paper tubes 7 are embedded in the protective sleeve 6. When the corrugated cardboard is subjected to external pressure, the thick paper tubes 7 can evenly distribute the pressure, enhancing the compressive strength of the protective layer 4 in the area near the flow component. This prevents the protective layer 4 from deforming or cracking due to excessive local pressure, ensuring the overall structural stability of the corrugated cardboard. The corrugated base layer 1, together with the flame-retardant composite fiberboard 2, fire-retardant layer 3, and protective layer 4 on both sides, constitute a tight multi-layer structure. This structure works synergistically in all directions to improve the compressive and bending mechanical properties of the corrugated cardboard, enabling it to withstand the pressure of heavier items and various external impacts during transportation. The flow component is formed by opening a first through hole 8 inside the protective layer 4. The first through hole 8 and the second through hole are formed, and the third through hole is opened at the corresponding position inside the fireproof and flame-retardant layer 3 and the flame-retardant composite fiberboard 2 to form a through-ventilation channel. These channels allow air to circulate inside the packaging, which helps to reduce the humidity and temperature inside the corrugated cardboard, prevent internal mold growth caused by heat and moisture, increase its service life, and achieve a good balance between breathability and waterproofing and moisture resistance. The rubber buffer strips 10 arranged on the outer surface of the protective layer 4 are staggered with the first through hole 8. When the corrugated cardboard is hit by external impact, the rubber buffer strips 10 can effectively buffer and absorb impact energy, reduce the damage of impact force to the internal structure of the corrugated cardboard, and improve the impact resistance of the corrugated cardboard.

[0025] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0026] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fire-retardant corrugated paperboard, characterized in that, include: The corrugated paper base layer has flame-retardant composite fiberboard bonded to both sides. A fire-retardant layer is bonded to the side of the flame-retardant composite fiberboard away from the corrugated paper base layer. A protective layer is bonded to the side of the fire-retardant layer away from the flame-retardant composite fiberboard. A waterproof and moisture-proof coating is applied to the side of the protective layer away from the fire-retardant layer. A flow support mechanism is installed inside the protective layer. The flow support mechanism includes a flow component and a support component. The flow component is used to allow air to pass through and prevent external water from entering. The support component is used to improve the structural strength of the flow component.

2. The flame-retardant corrugated cardboard according to claim 1, characterized in that, The support components include multiple sets of protective sleeves embedded inside the protective layer. The protective sleeves are made of silicone, and multiple sets of thick wallpaper tubes are embedded inside the protective sleeves.

3. The flame-retardant corrugated cardboard according to claim 1, characterized in that, The circulation component includes a first through hole located at both ends of the protective sleeve inside the protective layer, and a second through hole corresponding to the first through hole at both ends inside the protective layer.

4. The flame-retardant corrugated cardboard according to claim 1, characterized in that, A third through hole is provided inside the fireproof and flame-retardant layer and the flame-retardant composite fiberboard corresponding to the first through hole. A waterproof layer is bonded to one end of the inner wall of the first through hole, the second through hole and the third through hole. The waterproof layer is a halogen-free flame-retardant PET film.

5. The flame-retardant corrugated cardboard according to claim 4, characterized in that, Multiple sets of rubber buffer strips are arranged on the outer surface of the protective layer, and the positions of the first through holes of the rubber buffer strips are staggered.

6. The flame-retardant corrugated cardboard according to claim 5, characterized in that, The fire-retardant layer is aramid fiber paper impregnated with phosphorus-nitrogen intumescent flame retardant, and the protective layer is glass fiber reinforced paper.

7. The flame-retardant corrugated cardboard according to claim 1, characterized in that, The waterproof and moisture-proof coating is a polyurea coating.

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