High-strength honeycomb structure paperboard

Abstract

The utility model relates to the technical field of honeycomb structure paperboards, and discloses a high-strength honeycomb structure paperboard which comprises two pieces of surface paper and further comprises a honeycomb paper core bonded between the two pieces of surface paper, a flame-retardant layer is arranged in the surface paper, the flame-retardant layer comprises a first flame-retardant material layer and a second flame-retardant material layer, and the first flame-retardant material layer and the second flame-retardant material layer are arranged in the honeycomb paper core. A waterproof layer is arranged in the surface paper, the waterproof layer comprises a first waterproof material layer and a second waterproof material layer, and a support plate is arranged between the two pieces of surface paper by a circle. The paper tube is arranged on the periphery between the two pieces of surface paper, the paper tube is of a corrugated design, the corrugated structure is elastically folded when stressed and is similar to accordion compression, shear force is converted into deformation energy, impact energy is absorbed, the shear resistance is improved, the impact resistance between the two pieces of surface paper can be improved through cooperation of the supporting plate and the inclined plate, and the service life of the paper tube is prolonged. And by matching with the reinforcing paper board, the support plate can form an I shape, the deformation of the surface layer is inhibited, and the flexural modulus of the bend is improved.

Description

Technical Field

[0001] This utility model relates to the field of honeycomb structure paperboard technology, specifically a high-strength honeycomb structure paperboard. Background Technology

[0002] Honeycomb structure paperboard is a biomimetic engineering material whose core design mimics the hexagonal structure of a honeycomb. Due to its lightweight and high strength, it is widely used in packaging, construction, transportation, and other fields. It is composed of a honeycomb core layer and upper and lower panels, possessing both excellent mechanical properties and environmentally friendly characteristics.

[0003] Although the honeycomb structure paperboard currently on the market adopts a biomimetic honeycomb design in the core layer, which can provide a certain degree of overall strength support, there are still two significant structural defects in practical applications: First, because the edge parts between the two paper surfaces rely only on the lateral support of the honeycomb structure and lack longitudinal reinforcement, the edges are prone to bending and deformation when subjected to concentrated loads or lateral impacts, leading to structural instability; Second, the inherent hydrophilicity of traditional paper-based materials makes them prone to absorbing water and softening in humid environments. When the surface is wet or in a high-humidity environment, the paperboard will quickly lose its rigidity and soften and collapse, seriously affecting its load-bearing capacity and service life. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength honeycomb structure paperboard to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-strength honeycomb structure paperboard, comprising two face sheets, and further comprising:

[0006] A honeycomb paper core is bonded between two face sheets. The face sheets have a flame-retardant layer inside, which includes a first flame-retardant material layer and a second flame-retardant material layer. The face sheets also have a waterproof layer inside, which includes a first waterproof material layer and a second waterproof material layer. A support plate is provided around the perimeter between the two face sheets.

[0007] Preferably, a paper tube is bonded between the two face sheets, and the paper tube is corrugated.

[0008] Preferably, inclined plates are fixedly connected to both sides of the support plate surface, and the opposite sides of the two inclined plates are bonded to the face paper.

[0009] Preferably, a reinforcing cardboard is bonded between the two inclined plates, and the reinforcing cardboard is L-shaped.

[0010] Preferably, the first flame-retardant material layer is disposed inside the face paper, and the second flame-retardant material layer is disposed on one side of the first flame-retardant material layer.

[0011] Preferably, the first flame-retardant material layer is an ammonium polyphosphate coating, and the second flame-retardant material layer is made of flame-retardant PET.

[0012] Preferably, the first waterproof material layer is disposed on one side of the flame retardant layer, the second waterproof material layer is disposed on one side of the first waterproof material layer, the first waterproof material layer is made of PP film, and the second waterproof material layer is made of silicone nano-coating.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention features a paper tube arranged around the perimeter between two face sheets. The paper tube has a corrugated design, and the corrugated structure elastically folds under stress, similar to accordion compression, converting shear force into deformation energy, absorbing impact energy, and improving shear resistance. The support plate, in conjunction with the inclined plate, can improve the impact resistance between the two face sheets. Furthermore, with the reinforcement cardboard, the support plate can be made into an I-shape, suppressing surface deformation and increasing the bending modulus. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the high-strength honeycomb structure paperboard provided by this utility model;

[0016] Figure 2 A schematic diagram of the unfolded structure of the face paper provided by this utility model;

[0017] Figure 3 Provided by this utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the face paper provided by this utility model;

[0019] Figure 5 A schematic diagram of the flame-retardant layer structure provided by this utility model;

[0020] Figure 6 A schematic diagram of the waterproof layer structure provided by this utility model.

[0021] In the diagram: 1. Face paper; 2. Honeycomb paper core; 3. Flame retardant layer; 301. First flame retardant material layer; 302. Second flame retardant material layer; 4. Waterproof layer; 401. First waterproof material layer; 402. Second waterproof material layer; 5. Support plate; 6. Paper tube; 7. Inclined plate; 8. Reinforcing cardboard. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-6 As shown, a high-strength honeycomb structure paperboard includes two face sheets 1, and also includes:

[0024] A honeycomb paper core 2 is bonded between two face sheets 1. The face sheets 1 have a flame-retardant layer 3 inside, which includes a first flame-retardant material layer 301 and a second flame-retardant material layer 302. The face sheets 1 also have a waterproof layer 4 inside, which includes a first waterproof material layer 401 and a second waterproof material layer 402. A support plate 5 is arranged around the two face sheets 1. The honeycomb paper core 2 is bonded between the two face sheets 1, which can improve the strength of the entire paperboard. The flame-retardant layer 3 can improve the flame resistance of the face sheets 1. The use of flame-retardant materials can reduce losses in the event of an accidental fire. The waterproof layer 4 can improve the waterproof performance of the face sheets 1 and improve the environmental adaptability of the paperboard, so that the paperboard can maintain a certain strength when exposed to water.

[0025] A paper tube 6 is bonded between two face sheets 1. The paper tube 6 is corrugated. Both sides of the support plate 5 are fixedly connected to inclined plates 7. The opposite sides of the two inclined plates 7 are bonded to the face sheets 1. A reinforcing cardboard 8 is bonded between the two inclined plates 7. The reinforcing cardboard 8 is L-shaped. Due to the corrugated design of the paper tube 6, the corrugated structure elastically folds under force, similar to accordion compression, converting shear force into deformation energy, absorbing impact energy, and improving shear resistance. The inclined plates 7 on both sides of the support plate 5 can improve the strength of the support plate 5 and the face sheets 1 under pressure. Furthermore, the L-shaped reinforcing cardboard 8 fixed between the two inclined plates 7 forms a triangle in the middle of the inclined plates 7, which further improves the compressive strength and ensures the strength of the cardboard in subsequent use.

[0026] The first flame-retardant material layer 301 is disposed inside the face paper 1, and the second flame-retardant material layer 302 is disposed on one side of the first flame-retardant material layer 301. The first flame-retardant material layer 301 is an ammonium polyphosphate coating, and the second flame-retardant material layer 302 is made of flame-retardant PET. By setting the ammonium polyphosphate coating on the inside of the face paper 1 as the first flame-retardant material layer 301, its gas-phase-condensed-phase dual flame-retardant mechanism can be utilized: when heated, it decomposes to generate polyphosphate, which promotes fiber carbonization and forms an expanding heat insulation layer, while releasing ammonia to dilute oxygen, thus achieving rapid flame retardancy. On the outside of the first flame-retardant material layer 301, a flame-retardant PET film is composited as the second flame-retardant material layer 302. Through its melt self-extinguishing characteristics and high melting point, it forms a physical barrier, which not only prevents flame penetration but also effectively prevents the APP coating from degrading and failing due to high temperature. At the same time, the smooth surface of the flame-retardant PET layer also has wear-resistant and moisture-proof functions, achieving a synergistic improvement in fire resistance and practicality.

[0027] The first waterproof material layer 401 is disposed on one side of the flame-retardant layer 3, and the second waterproof material layer 402 is disposed on one side of the first waterproof material layer 401. The first waterproof material layer 401 is made of PP membrane, and the second waterproof material layer 402 is made of silicone nano-coating. By setting the PP membrane on the outside of the flame-retardant layer 3 as the first waterproof material layer 401, its dense polypropylene structure can provide a basic waterproof barrier, completely blocking the penetration of liquid water while maintaining excellent flexibility. The silicone nano-coating added on the outside of the PP membrane as the second waterproof material layer 402 forms a self-cleaning surface through its superhydrophobic properties. It can not only allow water droplets to roll off and carry away pollutants, but also effectively prevent water vapor from condensing at the micropores, making up for the moisture defects that may occur in the PP membrane in a humid and hot environment. At the same time, the chemical inertness of the silicone coating can also synergistically improve the weather resistance of the flame-retardant layer 3, achieving an organic unity of waterproof and fireproof performance.

[0028] Working principle: First, when the face paper 1 is used, the honeycomb paper core 2 works in conjunction with the paper tube 6 and the support plate 5. The corrugated design of the paper tube 6 allows it to undergo elastic compression deformation when subjected to external impact, similar to the folding mechanism of an accordion. This effectively converts external shear force into deformation energy absorption, significantly improving the overall shear resistance of the structure. At the same time, the support plate 5 is innovatively equipped with inclined plates 7 on both sides. This inclined support structure not only enhances the synergistic load-bearing capacity of the support plate 5 and the face paper 1 under pressure, but also forms a stable triangular support structure in the middle of the inclined plate 7 through clever cooperation with the L-shaped reinforcing cardboard 8. This triple-reinforcement design—corrugated energy absorption, diagonal support, and triangular reinforcement—ensures the cardboard maintains excellent compressive stability during long-term use. It effectively solves key technical problems of traditional cardboard, such as easy deformation at the edges and insufficient impact resistance, providing a reliable solution for high-strength packaging applications. By applying an ammonium polyphosphate coating as the first flame-retardant layer 301 on the inner side of the face paper 1, its dual gas-phase and condensed-phase flame-retardant mechanism is utilized: upon heating, it decomposes to generate polyphosphate, promoting fiber carbonization to form an expanding heat-insulating layer, while simultaneously releasing ammonia to dilute oxygen, achieving rapid flame retardancy. Meanwhile, a flame-retardant PET film is composited on the outside of the first flame-retardant layer 301 as the second flame-retardant layer 302. Its melt-self-extinguishing properties and high melting point form a physical barrier, not only preventing flame penetration but also effectively preventing APP (flame penetration). The coating degrades and fails due to high temperature. Meanwhile, the smooth surface of the flame-retardant PET layer also has wear resistance and moisture-proof functions, achieving a synergistic improvement in fire resistance and practicality. By setting a PP membrane as the first waterproof material layer 401 on the outside of the flame-retardant layer 3, its dense polypropylene structure can provide a basic waterproof barrier, completely blocking liquid water penetration while maintaining excellent flexibility. On the outside of the PP membrane, an organosilicon nano-coating is added as the second waterproof material layer 402. Through its superhydrophobic properties, it forms a self-cleaning surface, which can not only allow water droplets to roll off and carry away pollutants, but also effectively prevent water vapor from condensing at the micropores, making up for the moisture defects that the PP membrane may have in humid and hot environments. At the same time, the chemical inertness of the organosilicon coating can also synergistically improve the weather resistance of the flame-retardant layer 3, achieving an organic unity of waterproof and fireproof performance.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[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 high-strength honeycomb-structured paperboard comprising two face papers (1), characterized in that, Also includes: A honeycomb paper core (2) is bonded between two face sheets (1). A flame-retardant layer (3) is provided inside the face sheet (1). The flame-retardant layer (3) includes a first flame-retardant material layer (301) and a second flame-retardant material layer (302). A waterproof layer (4) is provided inside the face sheet (1). The waterproof layer (4) includes a first waterproof material layer (401) and a second waterproof material layer (402). A support plate (5) is provided around the two face sheets (1).

2. A high-strength honeycomb-structured paperboard according to claim 1, characterized in that: A paper tube (6) is bonded between the two face sheets (1), and the paper tube (6) is corrugated.

3. A high-strength honeycomb-structured paperboard according to claim 1, characterized in that: Both sides of the support plate (5) are fixedly connected with inclined plates (7), and the opposite sides of the two inclined plates (7) are bonded to the face paper (1).

4. A high-strength honeycomb-structured paperboard according to claim 1, characterized in that: A reinforcing cardboard (8) is bonded between the two inclined plates (7), and the reinforcing cardboard (8) is L-shaped.

5. A high-strength honeycomb-structured paperboard according to claim 1, characterized in that: The first flame retardant material layer (301) is disposed inside the face paper (1), and the second flame retardant material layer (302) is disposed on one side of the first flame retardant material layer (301).

6. A high-strength honeycomb structure paperboard according to claim 5, characterized in that: The first flame retardant material layer (301) is an ammonium polyphosphate coating, and the second flame retardant material layer (302) is made of flame retardant PET.

7. A high-strength honeycomb-structured paperboard according to claim 1, characterized in that: The first waterproof material layer (401) is disposed on one side of the flame retardant layer (3), and the second waterproof material layer (402) is disposed on one side of the first waterproof material layer (401). The first waterproof material layer (401) is made of PP film, and the second waterproof material layer (402) is made of silicone nano-coating.

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