High-strength corrugated board with fracture resistance function

Abstract

The utility model discloses a high-strength corrugated board with fracture resistance function, which relates to the technical field of paperboards, and comprises a central layer, reinforcing strips, first buffer layers and second buffer layers, the two sides of the central layer are provided with the first buffer layers, the second buffer layers are arranged on the first buffer layers, the central layer is provided with a groove, and the reinforcing strips are arranged in the groove. The reinforcing strips are bonded in the grooves, the reinforcing strips are provided with the grooves and are perpendicular to one another through the grooves, the buffer strips are arranged in the first buffer layer, the buffer rings are arranged in the second buffer layer, and the first buffer layer and the second buffer layer are combined for use, so that double buffer protection is provided for the paperboard; according to the corrugated board, the lines formed at the joints of the buffer strips are perpendicular to the lines formed at the joints of the buffer rings, and meanwhile, the memory sponge is added, so that impact force borne by packaging from any direction can be effectively absorbed and dispersed through the vertically connected buffer structures, and the fracture resistance and the strength of the corrugated board are improved.

Description

Technical Field

[0001] This utility model relates to the field of cardboard technology, and in particular to a high-strength corrugated cardboard with anti-folding function. Background Technology

[0002] Corrugated cardboard, also known as corrugated paperboard, is made by bonding together linerboard, core paper, and corrugated paper that has been processed into a wave shape. The corrugations resemble interconnected arches, arranged side-by-side and supporting each other to form a triangular structure. It boasts advantages such as high mechanical strength, good processing performance, and environmental friendliness and recyclability. Corrugated cardboard is highly favored due to its unique properties and wide range of applications. Specific uses include, but are not limited to, making various types of packaging boxes, such as shipping boxes and gift boxes, for protecting and transporting goods; and making various cushioning materials, such as bubble wrap and foam board, for protecting fragile items.

[0003] Patent CN218453264U, published on February 7, 2023, discloses high-strength corrugated cardboard, including a core linerboard and a face linerboard laminated on both sides of the core linerboard. The core linerboard is recessed at the creases corresponding to the cardboard box, and the face linerboard has a smooth transition, allowing for localized elongation when the face linerboard is laminated to the core linerboard. This high-strength corrugated cardboard is composed of thick-flute and thin-flute boards. After die-cutting to form the cardboard box, the recessed areas at the bends, along with the appropriate elongation of the face linerboard, ensure the integrity of the cardboard while maintaining overall strength. The strength is not affected by grooving or creasing.

[0004] In the packaging industry, cardboard is commonly used to package various goods. High-strength corrugated cardboard with folding resistance can better withstand external pressure and impact during transportation and storage, thus effectively protecting goods from damage. However, when corrugated cardboard collides with other objects, it is prone to bending and deformation due to its insufficient folding resistance, thereby reducing the practicality of the packaging box. The above solution considers the inward setting at the bending point of the cardboard, so that the face paper is appropriately lengthened at the bending point to avoid excessive deformation of the face paper after bending, which would cause the face paper to break and thus affect the overall strength of the cardboard. However, the folding resistance is still insufficient.

[0005] Therefore, it is necessary to provide a high-strength corrugated cardboard with folding resistance. Utility Model Content

[0006] This application provides a high-strength corrugated cardboard with folding resistance, which can improve the problem of insufficient folding resistance of corrugated paper in related technologies, which is prone to bending and deformation. This causes the corrugated paper to be easily bent and deformed during transportation and storage, which will reduce its cushioning and protective capabilities and may lead to damage to the contents.

[0007] This application provides a high-strength corrugated cardboard with anti-folding function, including a center layer, reinforcing strips, a first buffer layer and a second buffer layer. The center layer is provided with the first buffer layer on both sides, and the second buffer layer is provided on the first buffer layer. The center layer has a groove, and the reinforcing strip is bonded in the groove. There are multiple reinforcing strips, each with a groove, and they are interlocked perpendicularly to each other through the groove.

[0008] This application provides a high-strength corrugated cardboard with folding resistance, featuring multiple mutually perpendicular reinforcing strips cleverly arranged inside the central layer. This design not only enhances the structural stability of the cardboard but also effectively improves its folding resistance in both the transverse and longitudinal dimensions. This means that the cardboard can better resist bending and folding forces in both the horizontal and vertical directions, thus maintaining its shape and structural integrity. The combined use of the first and second buffer layers provides double cushioning protection for the cardboard. The second buffer layer, as the first line of defense directly facing external pressure and impact, can effectively absorb and disperse these forces, reducing damage to the cardboard's interior. The first buffer layer further enhances the cardboard's flexibility and cushioning capacity; like a soft pad, it can undergo moderate deformation when subjected to external forces, thereby absorbing more energy and protecting the cardboard from damage.

[0009] The technical solutions described above in this application embodiment have at least the following technical effects: the center layer is provided with reinforcing strips, and multiple reinforcing strips are perpendicular to each other, which can increase the folding resistance of the cardboard in both the horizontal and vertical directions. The first buffer layer and the second buffer layer together play a double buffering role. The second buffer layer directly bears external pressure and impact, and the first buffer layer increases the flexibility and buffering capacity of the cardboard.

[0010] In some embodiments, the first buffer layer has a groove, and a buffer strip is disposed in the groove, the buffer strip being arranged in a triangular shape.

[0011] In some embodiments, the second buffer layer has a groove, and a buffer ring is disposed in the groove, the buffer ring being cylindrical.

[0012] In some embodiments, the lines formed by the joints between the buffer strips are perpendicular to the lines formed by the joints between the buffer rings.

[0013] In some embodiments, the surface of the second buffer layer is provided with a waterproof coating.

[0014] In some embodiments, the central layer has a through hole that penetrates the first buffer layer and the second buffer layer, and a reinforcing post is provided on the through hole.

[0015] In some embodiments, memory foam is provided in the cavity formed by the buffer strip and the first buffer layer, as well as inside the buffer ring. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of an overall structure of high-strength corrugated cardboard with folding resistance provided in this application embodiment;

[0018] Figure 2 This is a schematic diagram of a high-strength corrugated cardboard section with folding resistance provided in an embodiment of this application.

[0019] Figure 3 A schematic diagram of a cross-sectional structure of a high-strength corrugated cardboard with folding resistance provided in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of a reinforcing strip in a high-strength corrugated cardboard with folding resistance, provided as an embodiment of this application.

[0021] The following are the labeling elements in the figure:

[0022] 1. Core layer; 2. Reinforcing strip; 3. First buffer layer; 4. Second buffer layer; 5. Buffer strip; 6. Buffer ring; 7. Reinforcing column; 8. Memory foam. Detailed Implementation

[0023] Based on this, in order to improve the problem that corrugated paper has insufficient folding resistance in related technologies, is prone to bending and deformation, and is therefore easily bent and deformed during transportation and storage, which will reduce its cushioning and protection capabilities and may lead to damage to the contents, the embodiments of this application provide the following solutions.

[0024] Please refer to the following: Figures 1-4 It includes a central layer 1, a reinforcing strip 2, a first buffer layer 3 and a second buffer layer 4. The first buffer layer 3 is bonded to both sides of the central layer 1, and the second buffer layer 4 is bonded to the first buffer layer 3. The central layer 1 has a groove, and the reinforcing strip 2 is bonded in the groove. There are multiple reinforcing strips 2, each with a groove, which are perpendicularly interlocked with each other. The surface of the second buffer layer 4 is coated with a waterproof coating.

[0025] This design cleverly incorporates multiple perpendicular reinforcing strips 2 within the central layer 1 of the cardboard. This not only enhances the structural stability of the cardboard but also effectively improves its folding resistance in both the horizontal and vertical directions. This means that the cardboard can better resist bending and folding forces in both the horizontal and vertical directions, thus maintaining its shape and structural integrity. The combined use of the first buffer layer 3 and the second buffer layer 4 provides double cushioning protection for the cardboard. The second buffer layer 4, as the first line of defense directly facing external pressure and impact, can effectively absorb and disperse these forces, reducing damage to the inside of the cardboard. The first buffer layer 3 further enhances the cardboard's flexibility and cushioning capacity. Like a soft pad, it can undergo moderate deformation when subjected to external forces, thereby absorbing more energy and protecting the cardboard from damage. After corrugated paper is used to make product packaging, it often faces various environmental conditions, especially humid environments. After applying a waterproof coating, a waterproof layer can be formed on the surface of the carton, effectively preventing moisture from penetrating into the inside of the carton and protecting the internal goods from moisture damage. The waterproof coating not only enhances the waterproof performance of the corrugated paper but also improves its overall strength to a certain extent. The coating fills the tiny pores on the surface of corrugated paper, making it denser and thus improving its resistance to compression and tearing. At the same time, the waterproof coating can effectively prevent the carton from absorbing moisture and deforming in a humid environment, maintaining the stability and shape integrity of the carton.

[0026] Optionally, in some embodiments, please also refer to Figure 1 The first buffer layer 3 has a groove, and a buffer strip 5 is bonded inside the groove. The buffer strip 5 is arranged in a triangular shape.

[0027] With this design, the cushioning strip 5 can effectively absorb external impact and vibration, reducing the direct impact of these forces on the contents inside the corrugated cardboard. The triangular arrangement allows the cushioning strip 5 to disperse the force when impacted, preventing the force from concentrating on a single point, thereby improving the overall cushioning effect. The combined effect of the groove and the cushioning strip 5 can limit the deformation range of the corrugated cardboard, enabling it to maintain good shape stability when subjected to external forces. This helps ensure the integrity and reliability of the packaging during transportation and storage.

[0028] Optionally, in some embodiments, please also refer to Figure 1 The second buffer layer 4 has a groove, and a buffer ring 6 is bonded in the groove. The buffer ring 6 is cylindrical. In the second buffer layer 4 on both sides, the radius of the buffer ring 6 in one side of the buffer layer is larger than that in the other side. When the packaging box is made with this corrugated paper, the side with the larger radius of the buffer ring 6 can face outwards from the packaging box.

[0029] This design allows the cylindrical cushioning ring 6 to possess excellent elasticity and resilience. When subjected to external impact, it can quickly absorb energy and disperse it into the surrounding material. This dispersion helps reduce the direct impact of the impact on the contents of the corrugated cardboard packaging, minimizing the risk of damage. The presence of the cushioning ring 6 increases the cushioning area of ​​the corrugated cardboard. The introduction of the cushioning ring 6 enhances the compressive strength of the corrugated cardboard, enabling it to withstand greater pressure without deformation. This is particularly important for packaging that needs to withstand heavy loads or long-term stacking, helping to extend the service life of the packaging. By bonding the cushioning ring 6 within the groove, packaging materials can be used more effectively, reducing unnecessary waste. This design makes the packaging more compact and efficient, reducing production and transportation costs. The side of the cushioning ring 6 with a larger radius can face outwards from the packaging box, greatly increasing the inward folding and compressive strength of the corrugated cardboard packaging box.

[0030] Optionally, in some embodiments, please also refer to Figure 2 The lines formed by the connection points between the buffer strips 5 and the lines formed by the connection points between the buffer rings 6 are perpendicular to each other.

[0031] With this configuration, the vertical connection between the buffer strip 5 and the buffer ring 6 forms a cross-support structure. This structure is more mechanically stable. When the corrugated paper is subjected to external force, the cross-support structure can more effectively disperse and resist the force, preventing the corrugated paper from deforming or breaking. The vertically connected buffer strip 5 and buffer ring 6 can provide better multi-directional cushioning effect. No matter which direction the packaging is subjected to impact force, it can be effectively absorbed and dispersed through the vertically connected cushioning structure, while reducing the impact point.

[0032] Optionally, in some embodiments, please also refer to Figure 1 The four corners of the central layer 1 are provided with through holes, which penetrate the first buffer layer 3 and the second buffer layer 4. Reinforcing columns 7 are slidably connected to the through holes.

[0033] With this design, when the pressure on the corrugated paper far exceeds its designed load-bearing capacity, the buffer rings 6 and 5, originally designed to absorb and disperse impact forces, may not be able to quickly and completely return to their original shape after deformation. In this situation, the specially designed reinforcing column 7 plays a crucial supporting role to ensure the stability and durability of the entire structure. The reinforcing column 7 not only enhances the overall structural strength, but more importantly, it effectively prevents the deformation of the buffer rings 6 and 5 from further escalating, preventing them from reaching or exceeding their maximum deformation limits. Thus, even under extreme pressure conditions, the reinforcing column 7 protects the cushioning system from permanently losing its resilience, ensuring that the corrugated paper and its packaging can still recover to their normal state as much as possible after being impacted by external forces, thereby maintaining its protective performance and service life.

[0034] Optionally, in some embodiments, please also refer to Figure 3 Memory foam 8 is provided in the cavity formed by the buffer strip 5 and the first buffer layer 3, as well as inside the buffer ring 6.

[0035] In this design, memory foam 8, a high-performance filling material, is cleverly applied to the internal structure of corrugated cardboard, greatly enhancing its overall stability and resistance to deformation. This unique filling method not only improves the physical properties of the corrugated cardboard but also provides superior protection. Specifically, when the corrugated cardboard is subjected to external force, the internal memory foam 8 responds quickly, distributing the pressure evenly throughout the structure. This characteristic effectively prevents excessive deformation of the corrugated cardboard due to excessive local stress, thus ensuring the overall integrity and stability of the carton. Through the uniform pressure distribution of memory foam 8, the corrugated cardboard can better withstand various external forces, extending its service life and reducing the risk of damage caused by deformation. More importantly, when the corrugated cardboard is impacted, memory foam 8, with its excellent viscoelastic properties, can quickly absorb a large amount of impact energy. This characteristic not only slows down the transmission speed of the impact force but also releases the absorbed energy in a slow and stable manner through the gradual recovery process of the foam. In this way, the packaged items can be fully protected during transportation and storage, even if they encounter accidental impacts, avoiding damage caused by violent vibrations or collisions.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-strength corrugated cardboard with folding resistance, characterized in that: It includes a central layer (1), reinforcing strips (2), a first buffer layer (3) and a second buffer layer (4). The central layer (1) has a first buffer layer (3) on both sides, and the second buffer layer (4) is disposed on the first buffer layer (3). The central layer (1) has a groove, and the reinforcing strip (2) is bonded in the groove. There are multiple reinforcing strips (2) and they have grooves, which are perpendicularly connected to each other through the grooves.

2. The high-strength corrugated cardboard with folding resistance according to claim 1, characterized in that, The first buffer layer (3) has a groove, and a buffer strip (5) is provided in the groove. The buffer strip (5) is arranged in a triangular shape.

3. A high-strength corrugated cardboard with folding resistance according to claim 2, characterized in that, The second buffer layer (4) has a groove, and a buffer ring (6) is provided in the groove. The buffer ring (6) is cylindrical.

4. A high-strength corrugated cardboard with folding resistance according to claim 3, characterized in that, The lines formed by the connection between the buffer strips (5) are perpendicular to the lines formed by the connection between the buffer rings (6).

5. A high-strength corrugated cardboard with folding resistance according to claim 4, characterized in that, The surface of the second buffer layer (4) is provided with a waterproof coating.

6. A high-strength corrugated cardboard with folding resistance according to claim 5, characterized in that, The central layer (1) has a through hole that penetrates the first buffer layer (3) and the second buffer layer (4), and a reinforcing post (7) is provided on the through hole.

7. A high-strength corrugated cardboard with folding resistance according to claim 6, characterized in that, Memory foam (8) is provided in the cavity formed by the buffer strip (5) and the first buffer layer (3) and inside the buffer ring (6).

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