Honeycomb buffering packaging paperboard, processing equipment and packaging carton

Abstract

The invention provides a honeycomb buffering packaging paperboard, processing equipment and a packaging carton, and the thickness of the honeycomb buffering packaging paperboard ranges from 3mm to 8mm; the honeycomb buffering packaging paperboard comprises an upper paper surface layer, a core layer and a lower paper surface layer which are sequentially arranged from top to bottom in a stacked mode, and the core layer is composed of a plurality of honeycomb holes which are linearly arranged at intervals in an array mode. By limiting the thickness of the honeycomb buffer packaging paperboard, the size parameters of the honeycomb holes and the like, the buffer energy absorption and structure adaptation performance of the honeycomb buffer packaging paperboard is intensified in a targeted mode; sufficient compression deformation space is reserved for honeycomb hole walls through thickness limitation, and falling impact energy can be efficiently dispersed and dissipated layer by layer in cooperation with a high-density array structure of small-side-length honeycomb holes, so that the situation that a display screen panel is damaged due to stress concentration is avoided.

Description

Technical Field

[0001] This invention relates to the field of packaging cushioning technology, specifically to a honeycomb cushioning packaging cardboard and processing equipment, and a packaging carton. Background Technology

[0002] Due to its biomimetic design, honeycomb structures offer lightweight, high rigidity, excellent energy absorption, and uniform force distribution, leading to their mature applications in multiple fields. In aerospace engineering, honeycomb structures are widely used in components such as fuselages, wings, and spacers, effectively reducing structural weight and improving fuel efficiency and stability. In the automotive industry, their use in lightweight design of body and cabin components enhances structural safety and energy efficiency. Furthermore, in marine engineering, medical implants, furniture, and sports equipment, honeycomb structures have become the preferred structural form for critical components due to their targeted mechanical performance advantages.

[0003] In the packaging industry, with increasing environmental awareness, the environmental problems caused by the non-degradability of traditional cushioning materials such as foam plastics are becoming increasingly prominent. Developing environmentally friendly cushioning packaging materials has become an inevitable trend in the industry. Currently, cushioning packaging on the market mainly relies on materials such as plastic foam, bubble wrap, or corrugated paper. While plastic foam materials offer acceptable cushioning performance, they present environmental pollution and recycling challenges. Corrugated paper materials, although more environmentally friendly, have limited cushioning protection capabilities and cannot meet the transportation protection needs of delicate, fragile, or large-volume products.

[0004] Although the superior mechanical properties of honeycomb structures are widely recognized in the industry, and honeycomb paper has emerged as an environmentally friendly material in the packaging field, its application is mostly limited to the rigid support of outer packaging boxes, without structural design and application development specifically for cushioning and protection. In existing technologies, honeycomb paper is not effectively utilized as a cushioning structure, rendering its energy absorption and impact resistance properties ineffective in packaging cushioning scenarios. The industry still lacks a honeycomb paper-based cushioning packaging solution that combines environmental friendliness with high-efficiency cushioning performance, making it difficult to balance the multiple demands of packaging protection, environmental requirements, and cost control. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a honeycomb cushioning packaging paperboard, processing equipment, and packaging carton to solve the problems mentioned in the background section above.

[0006] This invention is achieved through the following technical solution: A honeycomb cushioning packaging paperboard, wherein the thickness of the honeycomb cushioning packaging paperboard is between 3 mm and 8 mm; the honeycomb cushioning packaging paperboard comprises an upper paper surface layer, a core layer and a lower paper surface layer arranged sequentially from top to bottom, wherein the core layer is composed of a plurality of honeycomb cells arranged in a linearly spaced array; the side length of the honeycomb cells is less than or equal to 6 mm.

[0007] Furthermore, the shape of the honeycomb holes is a regular polygon with five or more sides.

[0008] Furthermore, the honeycomb cells have a regular hexagonal structure.

[0009] Furthermore, the side length of the honeycomb holes is between 3mm and 6mm; the thickness of the honeycomb cushioning packaging cardboard is between 3mm and 7mm.

[0010] Furthermore, the density of the honeycomb cushioning packaging paperboard is greater than or equal to 3333 g / m³. 3 .

[0011] Furthermore, the honeycomb cushioning packaging cardboard is provided with fold lines, which separate the upper paper surface layer from the core layer.

[0012] A processing apparatus for producing the honeycomb cushioning packaging paperboard as described above, the processing apparatus comprising an upper cutting roller and a lower cutting roller; one of the upper cutting roller and the lower cutting roller is provided with a die for processing the fold lines, and the other is provided with a groove matching the die; sponge pads are evenly distributed around the periphery of the die and the groove.

[0013] A packaging carton, comprising the honeycomb cushioning packaging paperboard as described in any of the preceding claims, further comprising an outer packaging carton and a paper-plastic inner liner; the honeycomb cushioning packaging paperboard is embedded inside the outer packaging carton, and the paper-plastic inner liner is embedded inside the honeycomb cushioning packaging paperboard; the packaged item is disposed between the honeycomb cushioning packaging paperboard and the paper-plastic inner liner.

[0014] Furthermore, the honeycomb cushioning packaging paperboard includes a first honeycomb cushioning packaging paperboard located at the lower end of the packaged item. The first honeycomb cushioning packaging paperboard includes a bottom plate portion and a folded edge portion formed by folding the edge of the bottom plate portion. The folded edge portion abuts against the side end face of the packaged item.

[0015] Furthermore, the folded edge abuts against the long side end face of the packaged item, and the outer packaging carton is provided with a folded part that folds inward, the folded part abutting against the short side end face of the packaged item.

[0016] The beneficial effects of this invention are as follows: A honeycomb cushioning packaging paperboard, wherein the thickness of the honeycomb cushioning packaging paperboard is between 3mm and 8mm; the honeycomb cushioning packaging paperboard includes an upper paper surface layer, a core layer, and a lower paper surface layer stacked sequentially from top to bottom, wherein the core layer is composed of a plurality of honeycomb holes arranged in a linearly spaced array; the side length of the honeycomb holes is less than or equal to 6mm. This invention, by limiting the thickness of the honeycomb cushioning packaging paperboard and the size parameters of the honeycomb holes, specifically enhances its cushioning energy absorption and structural adaptability performance, meeting the protection requirements of delicate and fragile products such as displays: by limiting the thickness, sufficient compression deformation space is reserved for the honeycomb hole walls, and with the high-density array structure of small-side-length honeycomb holes, the impact energy of falling can be efficiently dispersed and dissipated layer by layer, avoiding stress concentration damage to the display panel; on the other hand, this parameter combination takes into account both cushioning flexibility and structural rigidity, which can weaken the impact force through the directional collapse of the hole walls, and prevent packaging displacement and deformation through the stable support of the core layer, ensuring that the display screen is always in a stable cushioned wrapping state during transportation and turnover, perfectly matching the "efficient cushioning +" requirements of delicate and fragile products. The core requirement is "precise protection". Attached Figure Description

[0017] Figure 1 This is a perspective view of a honeycomb cushioning packaging cardboard according to the present invention.

[0018] Figure 2 This is a view of a honeycomb cushioning packaging cardboard with the top paper layer removed, according to the present invention.

[0019] Figure 3 This is a partial perspective view of the upper and lower cutting rollers in a processing device according to the present invention.

[0020] Figure 4 This is a perspective view of a packaging carton according to the present invention.

[0021] Figure 5 This is a cross-sectional view of a packaging carton according to the present invention.

[0022] Figure 6 This is an exploded view of a packaging carton according to the present invention.

[0023] Figure 7 for Figure 6 A magnified view of a section at point M.

[0024] Figure 8 This is a schematic diagram showing the positions of the first to the third honeycomb cushioning packaging paperboard.

[0025] Figure 9 This is a three-dimensional image of the packaged product.

[0026] The above figures include the following reference numerals: 1. Honeycomb cushioning packaging paperboard; 11. Upper paper surface layer; 12. Core layer; 121. Honeycomb holes; 13. Lower paper surface layer; 2. Processing equipment; 21. Upper knife roller; 211. Die-cutting die; 22. Lower knife roller; 221. Knife groove; 23. Sponge pad; 1A. First honeycomb cushioning packaging paperboard; 1A1. Bottom plate; 1A2. Folded edge; 1A21. Vertical plate; 1B. Second honeycomb cushioning packaging paperboard; 1C. Third honeycomb cushioning packaging paperboard; 3. Outer packaging carton; 31. Folding section; 4. Paper-plastic liner; 41. Card slot; 42. Accessory slot; 5. Hollowed-out buffer zone; 6. Packaged product. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] As a first embodiment: Reference Figures 1 to 2 As shown, a honeycomb cushioning packaging paperboard, wherein the thickness of the honeycomb cushioning packaging paperboard 1 is ( Figure 1 The dimensions shown in H are between 3mm and 8mm; the honeycomb cushioning packaging paperboard 1 includes an upper paper surface layer 11, a core layer 12, and a lower paper surface layer 13 arranged sequentially from top to bottom, the core layer 12 being composed of a plurality of honeycomb holes 121 arranged in a linearly spaced array; the side length of the honeycomb holes 121 is (… Figure 2 The dimension shown in D is less than or equal to 6mm.

[0029] According to tests, if the thickness of the honeycomb cushioning packaging paperboard 1 is less than 3mm, the core layer 12 will have a weak support structure, failing to meet the standards in subsequent drop performance tests and thus failing to meet cushioning and protection requirements. If the thickness of the honeycomb cushioning packaging paperboard 1 is greater than 8mm, due to the increased number of stacked layers of the core layer 12 paper, it is difficult to ensure that all honeycomb holes 121 are formed synchronously during the die stamping process. The inner layer paper is affected by the lag in pressure transmission from the outer layer, which can easily lead to smaller hole diameters and tilted hole walls; the outer layer paper may suffer from defects such as hole wall tearing and irregular hole diameters due to excessive tension. Ultimately, this results in a disordered array of honeycomb holes 121, losing the mechanical performance advantages that the honeycomb structure should have. Therefore, as a preferred solution, the thickness of the honeycomb cushioning packaging paperboard 1 is between 3mm and 7mm.

[0030] The present invention has been tested and found that if the side length of the honeycomb hole 121 is greater than 6 mm, its performance is difficult to meet the requirements of precision cushioning and protection. The present invention further limits the side length of the honeycomb hole 121 to less than or equal to 6 mm, which can significantly improve the structural density of the core layer 12, making the stress distribution more uniform under external force, and thus significantly enhancing the flat crush strength and impact cushioning performance of the material. As a preferred solution, the side length of the honeycomb hole 121 is between 3 mm and 6 mm. If the side length of the honeycomb hole 121 is less than 3 mm, although it can theoretically further improve the structural density and flat crush strength, it will increase the difficulty of forming the honeycomb hole 121 of the core layer 12. The honeycomb hole 121 with too fine a size will place higher requirements on the mold precision, the basis weight of the base paper and the stamping parameters of the processing equipment 2.

[0031] The honeycomb cells 121 are regular polygons with five or more sides. With more than five sides, the contact between the cell walls and external forces is closer to uniform surface contact than localized point or line contact. When subjected to external impact or pressure, stress can be uniformly transmitted and dispersed along the cell walls throughout the core layer 12, significantly improving the material's impact resistance and compressive strength. Therefore, as a preferred embodiment, the honeycomb cells 121 are hexagonal in shape. Furthermore, the density of the honeycomb cushioning packaging paperboard 1 is greater than or equal to 3333 g / m³. 3 By setting the density parameters of the honeycomb cushioning packaging paperboard 1, the amount of base material and the density of the structure per unit area of ​​the honeycomb cushioning packaging paperboard 1 are ensured, providing more stable protective support for the packaged product 6.

[0032] The honeycomb cushioning packaging paperboard 1 is provided with fold lines, which separate the upper paper surface layer 11 from the core layer 12. The fold line structure allows the honeycomb cushioning packaging paperboard 1 to be folded into L-shaped, U-shaped, or other cushioning structures as needed, without the need for additional cutting and splicing, thus reducing processing steps and material waste.

[0033] The circular die semi-penetration process, through the semi-penetrating punching action of the circular die 211, can precisely control the cutting depth to the preset requirement of "only separating the upper paper surface layer 11 from the core layer 12, while keeping the lower paper surface layer 13 intact." The fold line is formed by a semi-cutting process using a circular die, and the upper paper surface layer 11 and core layer 12 at the fold line are cut to minimize the possibility of cracking on the inside of the fold line. At the same time, when the arc-shaped cutting edge of the circular die 211 contacts the honeycomb cushioning packaging cardboard 1, the stress is evenly distributed along the cutting edge, which can prevent fiber tearing caused by local stress concentration at the cutting point between the upper paper surface layer 11 and the core layer 12, thus minimizing the defect of cracking on the inside of the fold line and improving the surface flatness of the fold line by more than 90%.

[0034] As a second embodiment: Referring to Figure 3, a processing device 2 is used to produce the honeycomb cushioning packaging paperboard 1 as described above. The processing device 2 includes an upper cutting roller 21 and a lower cutting roller 22. One of the upper cutting roller 21 and the lower cutting roller 22 is provided with a die 211 for processing the fold lines, and the other is provided with a groove 221 that matches the die 211. Sponge pads 23 are evenly distributed around the periphery of the die 211 and the groove 221.

[0035] To process the fold lines of the honeycomb cushioning packaging paperboard 1, for example, Chinese patent document CN223631130U discloses a paperboard folding processing device, which rolls the honeycomb cushioning packaging paperboard 1 to create fold lines using an upper cutter roller 21 and a lower cutter roller 22. The improvement of the present invention is that one of the upper cutter roller 21 and the lower cutter roller 22 is provided with a die 211 for processing the fold lines, and the other is provided with a groove 221 that matches the die 211; the periphery of the die 211 and the groove 221 is evenly distributed with sponge pads 23.

[0036] During the folding process, a die 211 for folding is configured on one of the upper die roller 21 and the lower die roller 22, and a matching groove 221 is configured on the other. Precise half-cutting is achieved by controlling the depth of the die 211 pressing into the honeycomb cushioning packaging cardboard 1, i.e., cutting only the upper paper surface layer 11 and the core layer 12, while retaining the complete lower paper surface layer 13. Simultaneously, sponge pads 23 are evenly distributed around the die 211 and the groove 221. Their key function is to contact the honeycomb cushioning packaging cardboard 1 synchronously with the die 211 during the die-cutting process. The elastic pressure generated allows the sponge pad 23 to exert a reverse pushing force on the honeycomb cushioning packaging paperboard 1 after the die 211 completes the half-cutting action. This allows the processed paperboard to quickly separate from the die 211, effectively avoiding the problem in traditional structures without sponge pad 23 where the paperboard is embedded in the die 211 due to the adhesion of the die 211 blade or the stickiness of the paper layer after half-cutting. This ensures that the paperboard can smoothly detach from the die roller after folding, guaranteeing the stability and efficiency of continuous roll pressing. The production efficiency of the processing equipment 2 of this invention can reach 3000pcs / hour.

[0037] As a third embodiment: Reference Figures 4 to 9 As shown, a packaging carton includes the aforementioned honeycomb cushioning packaging cardboard 1, an outer packaging carton 3, and a paper-plastic liner 4; the honeycomb cushioning packaging cardboard 1 is housed inside the outer packaging carton 3, and the paper-plastic liner 4 is housed inside the honeycomb cushioning packaging cardboard 1; the packaged item 6 is disposed between the honeycomb cushioning packaging cardboard 1 and the paper-plastic liner 4.

[0038] Among them, the outer packaging carton 3 is used to resist impact and resist external collisions and squeezing; the honeycomb cushioning packaging paperboard 1 is used to absorb energy when the packaging carton is accidentally dropped. Utilizing the elastic deformation characteristics of the high-density small-side-length honeycomb holes 121, it can efficiently absorb impact energy when the packaging carton is accidentally dropped or subjected to severe vibration. The kinetic energy is dissipated through the compression and buckling deformation of the hole walls, preventing the packaged product 6 from being damaged or failing due to excessive impact force; the groove 41 of the paper-plastic inner liner 4 enables the precise positioning of the packaged product 6, preventing it from moving around inside the box.

[0039] Preferably, the honeycomb cushioning packaging paperboard 1 includes a first honeycomb cushioning packaging paperboard 1A located at the lower end of the packaged item 6. The first honeycomb cushioning packaging paperboard 1A includes a bottom plate portion 1A1 and a folded edge portion 1A2 formed by folding the edge of the bottom plate portion 1A1. The folded edge portion 1A2 abuts against the side end face of the packaged item 6.

[0040] The base plate 1A1 provides stable bottom support for the packaged product 6. The folded edge 1A2 is formed by folding the edge of the base plate 1A1 and supporting the side end face of the packaged product 6, forming a fully enclosed positioning structure that can effectively limit the horizontal movement, displacement or tipping of the packaged product 6. Even in the event of severe bumps or accidental drops during long-distance transportation, the packaged product 6 can remain relatively fixed. In the event of an accidental drop, it can absorb energy through the deformation of its built-in honeycomb holes 121.

[0041] The cooperation between the bottom and the paper-plastic liner 4 prevents the packaged product 6 from moving vertically and keeps the packaged product 6 relatively fixed.

[0042] The folded edge 1A2 abuts against the long side end face of the packaged item 6, and the outer packaging carton 3 is provided with a folding part 31 that folds inward, and the folding part 31 abuts against the short side end face of the packaged item 6.

[0043] The folded edge 1A2, integrally formed by the first honeycomb buffer, and the folding part 31, integrally formed by the outer packaging carton 3, limit the four sides of the packaged product 6. In the event of an accidental drop, the folded edge 1A2, made of honeycomb buffer packaging cardboard 1, can efficiently dissipate energy through the directional collapse and buckling deformation of the honeycomb hole 121 during the impact. The folding part 31 of the outer packaging carton 3 relies on the elastic deformation characteristics of the corrugated cardboard to assist in energy absorption. The folded edge 1A2 on the long side focuses on deep energy absorption, while the folding part 31 on the short side focuses on rigid buffering. Together, they weaken the transmission of impact energy to the core area of ​​the packaged product 6, greatly reducing the risk of damage to the packaged product 6 (such as the main body of the display screen).

[0044] In another embodiment, the bottom plate portion 1A1 can be bent to form folded edge portions 1A2 on all four sides, and the four folded edge portions 1A2 can support the four sides of the packaged item 6.

[0045] The honeycomb cushioning packaging paperboard 1 also includes a second honeycomb cushioning packaging paperboard 1B and a third honeycomb cushioning packaging paperboard 1C stacked sequentially at the lower end of the first honeycomb cushioning packaging paperboard 1A; the two sets of the second honeycomb cushioning packaging paperboard 1B and the third honeycomb cushioning packaging paperboard 1C are respectively disposed at the lower ends of both sides of the first honeycomb cushioning packaging paperboard 1A, so that the lower end of the middle area of ​​the first honeycomb cushioning packaging paperboard 1A forms a hollow buffer zone 5.

[0046] When the bottom of the packaging carton is impacted by falling perpendicular to the ground, the hollow buffer zone 5 at the lower end of the middle area of ​​the first honeycomb cushioning packaging paperboard 1A, through structural clearance, causes the honeycomb holes 121 on the side near the hollow buffer zone 5 to collapse preferentially during the impact of the second honeycomb cushioning packaging paperboard 1B and the third honeycomb cushioning packaging paperboard 1C. This directional collapse mode can concentrate the impact energy on the honeycomb holes 121 around the hollow buffer zone 5, avoiding the problem of the packaged product 6 shifting or moving to the side during the impact.

[0047] The folded edge portion 1A2 has at least two layers of vertical plates 1A21, and each of the vertical plates 1A21 is arranged perpendicularly to the bottom plate portion 1A1. Preferably, the number of vertical plates 1A21 can be three, four, or five. After bending, natural gaps will be formed between the vertical plates 1A21. Each layer of vertical plates 1A21 can absorb energy through compression deformation of the pore walls of the honeycomb holes 121, while the gaps between the vertical plates 1A21 provide sufficient space for deformation, avoiding stress concentration caused by the lack of gaps between layers, and improving the protection of the packaged product 6.

[0048] The four sides of the first honeycomb cushioning packaging paperboard 1A abut against the inner sidewall of the outer packaging carton 3. The four sides of the first honeycomb cushioning packaging paperboard 1A are tightly abutted against the inner sidewall of the outer packaging carton 3, forming an all-round positioning constraint, which can completely prevent the honeycomb cushioning packaging paperboard 1 from shifting, tilting or moving inside the carton when it is bumped during transportation or accidentally dropped. This ensures that the bottom plate 1A1 supports the bottom of the packaged product 6 and the folded edge 1A2 supports the long side at all times, eliminating the problem of protective failure caused by the displacement of the honeycomb cushioning packaging paperboard 1.

[0049] The outer packaging carton 3 is made of corrugated cardboard, which includes a top liner, a bottom liner, and one or more layers of corrugated core paper between the top and bottom liner. The corrugated core paper has a continuous arc-shaped corrugation and high fiber bonding strength with the top and bottom liner. The static stacking strength and bending rigidity of corrugated cardboard are far superior to other paper structures such as honeycomb paper, effectively resisting the risks of tearing and puncture during transportation and stacking.

[0050] The upper end of the paper-plastic liner 4 has an accessory slot 42. In this invention, the packaged product 6 is the main body of the display screen, and the accessory slot 42 is used to place display screen accessories. The main body of the display screen and the display screen accessories are transported in the same packaging carton, eliminating the need for separate packaging of accessories, reducing material consumption and operational steps in the packaging process, and lowering the packaging cost for large-scale transportation.

[0051] To verify the impact resistance of the packaging carton, when the packaging carton is dropped, the packaged product 6 will accelerate down with the packaging carton. At the moment of contact with the ground, it will suddenly decelerate from high speed to stand still. The greater the acceleration generated by this "deceleration process", the stronger the impact force on the product (according to the physical formula: impact force F = mass m × acceleration a).

[0052] The smaller peak acceleration indicates that the packaging's cushioning structure effectively extends the "deceleration time," dispersing and weakening the impact force, thus reducing the force on the packaged product and making it less prone to damage or malfunction.

[0053] Based on the above principles, the packaged product 6 of this invention is the main body of a display screen. The packaging carton containing the main body of the display screen is allowed to undergo free fall motion at the same height. Furthermore, by oriented different parts of the main body of the display screen perpendicular to the ground, and during its contact with the ground, the accelerations along the x-axis, y-axis, and z-axis are obtained, and the peak acceleration Gtotal is calculated.

[0054] This invention provides the following table: Table 1 shows the drop test results of a paper-plastic packaging box for a display screen disclosed in Chinese invention patent CN215362918U: Table 1

[0055] Table 2 shows the drop test results when the thickness of the honeycomb cushioning packaging cardboard 1 is 3 mm and the side length of the honeycomb hole 121 is equal to 4.5 mm: Table 2

[0056] Table 3 shows the drop test results when the thickness of the honeycomb cushioning packaging cardboard 1 is 6 mm and the side length of the honeycomb hole 121 is equal to 4.5 mm: Table 3

[0057] Table 4 shows the drop test results when the thickness of the honeycomb cushioning packaging cardboard 1 is 6 mm and the side length of the honeycomb hole 121 is equal to 3.5 mm: Table 4

[0058] In Tables 1 to 4 above, when the packaged item 6 is the main body of the display screen, refer to... Figure 9 As shown, the six sides of the display screen are marked with arrows; F1, or side 1, corresponds to the top side of the display screen; F2, or side 2, corresponds to the right side of the display screen; F3, or side 3, corresponds to the bottom side of the display screen; F4, or side 4, corresponds to the left side of the display screen; F5, or side 5, corresponds to the front side of the display screen; and F6, or side 6, corresponds to the back side of the display screen.

[0059] Table 1 shows the drop test data of the display paper-plastic packaging box disclosed in prior art CN215362918U (the paper tray material is corrugated cardboard). Table 3 shows the drop test data of the honeycomb cushioning packaging cardboard 1 with a thickness of 6mm and a honeycomb hole 121 side length of 4.5mm. The test conditions (drop height, drop location, type of packaged item 6, etc.) are completely consistent between the two, with only the cushioning material being different. The comparison of the test results is sufficiently accurate and convincing. As can be seen from the data, the average G-value of the test in Table 1 is 76, while the average G-value of the test in Table 3 drops to 63, a decrease of 17.1%. This significant difference proves that the present invention significantly improves the impact resistance of the packaging through material replacement. The honeycomb cushioning packaging cardboard 1, with its directional collapse energy absorption characteristics of the highly dense and small-side-length honeycomb holes 121, can more efficiently disperse and weaken the impact energy of the drop, providing a more reliable protective effect for delicate and fragile packaged items 6 such as displays, and effectively reducing the risk of panel breakage, frame damage, and interface failure caused by impact during transportation.

[0060] Furthermore, this application offers several practical advantages by replacing the lower paper tray material with honeycomb cushioning packaging paperboard 1: Firstly, the honeycomb cushioning packaging cardboard 1, due to the presence of the honeycomb core layer 12, not only has superior impact resistance, but its unit area weight is also reduced by 20%-30% compared to corrugated cardboard, resulting in a significant reduction in the overall weight of the entire packaging carton. This feature can reduce the load during transportation and lower logistics and transportation costs (especially suitable for long-distance, bulk transportation scenarios).

[0061] Secondly, the core layer 12 of the honeycomb cushioning packaging paperboard 1 is composed of honeycomb holes 121 arranged in a linearly spaced array. Compared with the solid layered structure of corrugated paperboard, it not only has better impact resistance, but also saves 15%-25% of paper raw material usage, directly reducing material procurement costs.

[0062] Tables 2 and 3 compare drop tests of the same honeycomb cushioning packaging paperboard 1 (only the thickness is different). The variable is the thickness of the honeycomb cushioning packaging paperboard 1 (3 mm in Table 2, 6 mm in Table 3). The side length of the honeycomb holes 121 is 4.5 mm. The test conditions (drop height, drop location, packaged product 6, etc.) are completely consistent. The comparison results can accurately reflect the influence of thickness on cushioning performance. The experimental results show that the 3 mm thick honeycomb cushioning packaging paperboard 1 is not rigid enough. When dropped, it is prone to overall deformation rather than local energy absorption, resulting in stress concentration and failing the drop resistance test.

[0063] Tables 3 and 4 compare drop tests of honeycomb cushioning packaging paperboard 1 of the same thickness. The core variable is the side length of the honeycomb pores 121 (4.5 mm in Table 3, 3.5 mm in Table 4). The test conditions (drop height, drop location, type of packaged product 6, etc.) are completely consistent. The experimental results show that when the side length of the honeycomb pores 121 is reduced from 4.5 mm to 3.5 mm, the core layer 12 structure becomes denser. When subjected to impact, more pore walls participate in stress transfer and deformation energy absorption, avoiding rapid compaction of local pore walls due to concentrated force. This allows the impact energy to be evenly distributed along the pore wall network, significantly reducing the peak acceleration.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0065] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A honeycomb cushioning packaging paperboard, characterized by: The thickness of the honeycomb cushion packaging paperboard (1) is in the range of 3mm to 8mm. The honeycomb cushion packaging paperboard (1) comprises an upper paper surface layer (11), a core layer (12) and a lower paper surface layer (13) arranged in sequence from top to bottom, and the core layer (12) is composed of a plurality of honeycomb holes (121) arranged in a linear interval array; the side length of the honeycomb hole (121) is less than or equal to 6mm.

2. A honeycomb cushioning packaging paperboard according to claim 1, characterized in that: The shape of the honeycomb hole (121) is a regular polygon with a side number greater than or equal to five.

3. A honeycomb cushioning packaging paperboard according to claim 2, characterized in that: The honeycomb hole (121) is a regular hexagonal structure.

4. A honeycomb cushioning packaging paperboard according to claim 3, characterized in that: The side length of the honeycomb hole (121) is in the range of 3mm to 6mm; the thickness of the honeycomb cushion packaging paperboard (1) is in the range of 3mm to 7mm.

5. A honeycomb cushioning packaging paperboard according to claim 1, characterized in that: The density of the honeycomb cushion packaging paperboard (1) is greater than or equal to 3333 g / m 3 .

6. A honeycomb cushioning packaging paperboard according to claim 1, characterized in that: The honeycomb cushion packaging paperboard (1) is provided with a folding line, which disconnects the upper paper surface layer (11) and the core layer (12).

7. A processing plant, said processing plant (2) for producing the honeycomb cushioning packaging paperboard (1) as defined in claim 6, characterized by: It comprises an upper knife roll (21) and a lower knife roll (22); one of the upper knife roll (21) and the lower knife roll (22) is provided with a knife die (211) for processing the folding line, and the other is provided with a knife groove (221) matched with the knife die (211); the peripheral edge of the knife die (211) and the knife groove (221) is uniformly provided with a sponge pad (23).

8. A packaging carton comprising a honeycomb cushioning packaging paperboard (1) according to any one of claims 1 to 6, characterized in that: It also includes an outer packaging carton (3) and a paper-plastic inner liner (4); the honeycomb cushion packaging paperboard (1) is built into the inside of the outer packaging carton (3), and the paper-plastic inner liner (4) is built into the inside of the honeycomb cushion packaging paperboard (1); the packaged product (6) is arranged between the honeycomb cushion packaging paperboard (1) and the paper-plastic inner liner (4).

9. A packaging carton according to claim 8 wherein: The honeycomb cushion packaging paperboard (1) comprises a first honeycomb cushion packaging paperboard (1A) located at the lower end of the packaged product (6); the first honeycomb cushion packaging paperboard (1A) comprises a bottom plate part (1A1) and a folded edge part (1A2) folded from the edge of the bottom plate part (1A1), which supports the side end face of the packaged product (6).

10. A carton according to claim 9 wherein: The folded edge part (1A2) supports the long side end face of the packaged product (6), and the outer packaging carton (3) is provided with an inwardly folded folding part (31), which supports the short side end face of the packaged product (6).

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