Tear-resistant corrugated board

Abstract

The utility model relates to the technical field of corrugated boards, in particular to a tear-resistant corrugated board, which adopts the technical scheme that the tear-resistant corrugated board comprises two panels, a corrugated board and a base board are clamped on the opposite sides of the two panels, and folding grooves are formed in the middle sections of the two panels; the number of the corrugated boards is two, and the base board is clamped on the opposite sides of the two corrugated boards. The middle section of the corrugated board and the middle section of the base board are both broken and provided with buffering pieces in an embedded mode, each buffering piece comprises a vulcanized rubber strip, and limiting clamps are arranged at the four corners of each vulcanized rubber strip. The corrugated paper has the advantages that when the corrugated paper is bent, the bent part is not easy to crack and break, and the problem that the bent part of the corrugated paper used at the present stage is easy to crack and break is solved.

Description

Technical Field

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

[0002] Corrugated cardboard is a structure made of multiple layers of paper bonded together. It is commonly used to make cartons, plywood, and packaging materials to protect fragile items. Because of its crucial role in packaging and transportation, the mechanical strength of corrugated cardboard is a key indicator for evaluating its quality.

[0003] Corrugated cardboard is commonly used to make cartons, and it consists of at least one layer of corrugated core paper and one layer of linerboard bonded together. This material is widely used due to its good elasticity and extensibility. During the carton manufacturing process, corrugated cardboard needs to undergo a bending process. However, if not handled properly during bending, the folds may become excessively bent, causing tears and breakage. Therefore, a tear-resistant corrugated cardboard is needed to address this problem. Utility Model Content

[0004] The purpose of this invention is to provide a tear-resistant corrugated cardboard that is less prone to cracking and breaking at the bend when folded, thus solving the problem that corrugated cardboard currently in use is prone to cracking and breaking at the bend.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tear-resistant corrugated cardboard, comprising two panels, wherein a corrugated board and a substrate are sandwiched between the two panels on opposite sides, and a folding groove is provided in the middle section of each of the two panels;

[0006] The number of corrugated sheets is two, and the substrate is clamped on the opposite side of the two corrugated sheets;

[0007] Both the corrugated board and the base plate are broken and embedded with buffer components in the middle section. The buffer components include vulcanized rubber strips, and each of the four corners of the vulcanized rubber strips is provided with a limiting clip.

[0008] Preferably, both panels have a wear-resistant layer on the side facing away from the corrugated board, and both panels are glued to the corrugated board on the side closest to it. This design, with a wear-resistant layer on the side of both panels away from the corrugated board, helps improve the durability of the panels and reduces wear caused by friction during long-term use. Simultaneously, the glued bonding method not only enhances the overall structural stability but also improves the tear resistance of the corrugated cardboard.

[0009] Preferably, both corrugated boards include a core paper layer, and a waterproof layer is glued to the outside of the core paper layer. In this design, the corrugated board is composed of a core paper layer, with a waterproof layer glued to the outside of the core paper layer. This structural design provides additional waterproof protection, allowing the corrugated board to be used in humid environments without damage, enhancing its suitability for varying environments.

[0010] Preferably, the substrate comprises a first cardboard and a second cardboard, both of which have a corrugated structure on opposite sides and are glued together. In this design, the substrate consists of a first cardboard and a second cardboard, both of which have a corrugated structure on opposite sides and are glued together. The corrugated structure not only increases the strength and tear resistance of the substrate but also provides better cushioning performance, helping to protect internal items from impacts.

[0011] Preferably, the grooves are located at the upper and lower ends of the buffer element, with the grooves on opposite sides of the two panels contacting but not being fixedly connected to the vulcanized rubber strip. This design allows for some movement during bending, reducing stress concentration at the bend and lowering the risk of tearing.

[0012] Preferably, the vulcanized rubber strip adopts an X-shaped structure design, with each of its four corners embedded in a limiting clip. This X-shaped structure provides multiple support points, enhancing the stability and load-bearing capacity of the cushioning component. Simultaneously, the limiting clips ensure that the vulcanized rubber strip does not shift during bending, maintaining its cushioning effect.

[0013] Preferably, there are four limiting clips, and the side of each of the four limiting clips facing away from the vulcanized rubber strip is snapped into the corrugated board and the base plate. The design includes four limiting clips, all of which are snapped into the corrugated board and base plate on the side facing away from the vulcanized rubber strip. This snap-fit ​​installation method not only simplifies the assembly process but also provides a secure fixation, ensuring that the cushioning component will not loosen or fall off during long-term use, thereby guaranteeing the durability and reliability of the corrugated cardboard.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention utilizes two panels that sandwich a corrugated sheet and a substrate. This multi-layered structure increases the overall thickness and strength, allowing for better stress distribution during bending and reducing cracks caused by excessive stress at a single point. A folding groove is provided in the middle section of the panel, a pre-set bending point that guides bending along a specific path, thereby reducing cracks caused by improper bending. A buffer is embedded at the midpoint between the corrugated sheet and the substrate; this design allows for some movement during bending, reducing stress concentration at the bend. The addition of the buffer provides extra support and elasticity, helping to absorb and disperse energy generated during bending. The vulcanized rubber strip in the buffer is a highly elastic material that provides good cushioning and resilience during bending, reducing stress concentration at the bend and thus lowering the risk of tearing. Limiting clips are provided at the four corners of the vulcanized rubber strip; these clips not only fix the vulcanized rubber strip, preventing displacement during bending, but also provide additional support points, enhancing the stability and load-bearing capacity of the buffer. These design features allow this corrugated cardboard to better absorb and disperse stress during bending, reducing stress concentration and thus lowering the risk of cracks and breaks at the bends. This design not only improves the durability of the corrugated cardboard but also enhances its protective performance during packaging and transportation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

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

[0018] Figure 3 This is a schematic diagram of the substrate structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the buffer structure of this utility model.

[0020] In the diagram: 1. Panel; 11. Folding groove; 2. Corrugated board; 21. Waterproof layer; 22. Core paper layer; 3. Substrate; 31. First cardboard; 32. Second cardboard; 4. Buffer; 41. Vulcanized rubber strip; 42. Limiting clip. Detailed Implementation

[0021] 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.

[0022] Example

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, one embodiment of the present invention is provided: a tear-resistant corrugated cardboard, including a panel 1, the number of panels 1 being two, the two panels 1 holding a corrugated board 2 and a substrate 3 on opposite sides, and both panels 1 having a folding groove 11 in the middle section;

[0024] There are two corrugated sheets 2, and the substrate 3 is clamped on the opposite side of the two corrugated sheets 2;

[0025] Both the corrugated board 2 and the base plate 3 are broken in the middle and a buffer 4 is embedded in them. The buffer 4 includes a vulcanized rubber strip 41, and a limit card 42 is provided at each of the four corners of the vulcanized rubber strip 41.

[0026] Specifically, two panels 1 are used, sandwiching the corrugated sheet 2 and the substrate 3. This multi-layered structure increases the overall thickness and strength, allowing for better stress distribution during bending and reducing cracks caused by excessive stress at a single point. A folding groove 11 is provided in the middle section of panel 1; this is a pre-set bending point that guides bending along a specific path, thereby reducing cracks caused by improper bending. A buffer 4 is embedded at the midpoint between the corrugated sheet 2 and the substrate 3. This design allows for some movement during bending, reducing stress concentration at the bend. The addition of the buffer 4 provides extra support and elasticity, helping to absorb and disperse the energy generated during bending. The vulcanized rubber strip 41 in the buffer 4 is a highly elastic material that provides good cushioning and rebound performance during bending, reducing stress concentration at the bend and thus lowering the risk of tearing. Each of the four corners of the vulcanized rubber strip 41 is equipped with a limiting clip 42. These limiting clips 42 not only fix the vulcanized rubber strip 41 and prevent it from shifting during bending, but also provide additional support points, enhancing the stability and load-bearing capacity of the cushioning element 4. Through these design features, this corrugated cardboard can better absorb and disperse stress during bending, reducing stress concentration and thus lowering the risk of cracks and breaks at the bends. This design not only improves the durability of the corrugated cardboard but also enhances its protective performance during packaging and transportation.

[0027] Furthermore, both panels 1 have abrasion-resistant layers on the side facing away from the corrugated board 2, and both panels 1 are glued to the corrugated board 2 on the side facing away from the corrugated board 2. This design, with abrasion-resistant layers on the side of both panels 1 away from the corrugated board 2, helps improve the durability of the panels 1 and reduces wear caused by friction during long-term use. Simultaneously, the glued bonding of the side of the panels 1 to the corrugated board 2 not only enhances the overall structural stability but also improves the tear resistance of the corrugated board.

[0028] Furthermore, both corrugated boards 2 include a core paper layer 22, and a waterproof layer 21 is glued to the outside of the core paper layer 22. In this design, the corrugated board 2 is composed of a core paper layer 22, with a waterproof layer 21 glued to the outside of the core paper layer 22. This structural design provides additional waterproof protection, allowing the corrugated cardboard to be used in humid environments without damage, enhancing its suitability for varying environments.

[0029] Furthermore, the substrate 3 includes a first cardboard 31 and a second cardboard 32. Both the first cardboard 31 and the second cardboard 32 have a corrugated structure design on opposite sides, and are glued together on opposite sides. In this design, the substrate 3 is composed of the first cardboard 31 and the second cardboard 32, which have a corrugated structure design on opposite sides and are glued together. The corrugated structure not only increases the strength and tear resistance of the substrate 3 but also provides better cushioning performance, helping to protect internal items from impacts.

[0030] Furthermore, the grooves 11 are located at the upper and lower ends of the buffer 4. The grooves 11 on opposite sides of the two panels 1 contact the vulcanized rubber strip 41 but are not fixedly connected. The design positions the grooves 11 at the upper and lower ends of the buffer 4, allowing them to contact the vulcanized rubber strip 41 without forming a fixed connection. This design allows for some movement during bending, reducing stress concentration at the bend and lowering the risk of tearing.

[0031] Furthermore, the vulcanized rubber strip 41 adopts an X-shaped structure design, with each of its four corners embedded in the limiting clips 42. This X-shaped structure provides multiple support points, enhancing the stability and load-bearing capacity of the buffer component 4. Simultaneously, the use of the limiting clips 42 ensures that the vulcanized rubber strip 41 will not shift during bending, maintaining its cushioning effect.

[0032] Furthermore, there are four limiting clips 42, and the side of each limiting clip 42 facing away from the vulcanized rubber strip 41 is snapped into the corrugated board 2 and the base plate 3. The design includes four limiting clips 42, all of which are snapped into the corrugated board 2 and the base plate 3 on the side facing away from the vulcanized rubber strip 41. This snap-fit ​​installation method not only simplifies the assembly process but also provides a secure fixation, ensuring that the cushioning component 4 will not loosen or fall off during long-term use, thereby guaranteeing the durability and reliability of the corrugated cardboard.

[0033] In use, this invention involves preparing two panels 1. The first cardboard 31 and the second cardboard 32 of the substrate 3 are designed with a corrugated structure to increase their tear resistance. The corrugated first cardboard 31 and the second cardboard 32 are glued together on opposite sides. A waterproof layer 21 is attached to the outside of the core paper layer 22 of the corrugated board 2 to enhance its waterproof performance. Two corrugated boards 2 are prepared and broken in the middle to prepare for the subsequent embedding of the cushioning member 4. A vulcanized rubber strip 41 is prepared and designed with an X-shaped structure. Install limiting clips 42 at the four corners of the vulcanized rubber strip 41, embed the vulcanized rubber strip 41 into the limiting clips 42, and ensure that the limiting clips 42 are snapped into place with the corrugated board 2 and the base plate 3. Add a wear-resistant layer to the side of the panel 1 facing away from the corrugated board 2 to improve wear resistance. Apply glue to the side of the panel 1 close to the corrugated board 2 to bond it to the corrugated board 2. Place the two panels 1 facing each other, ensuring that there is a folding groove 11 in the middle section. Clamp the base plate 3 on the opposite side of the two corrugated boards 2, ensuring that a buffer 4 is embedded at the break in the middle section of the corrugated board 2 and the base plate 3. Glue the panel 1 and the corrugated board 2 together to ensure the stability of the structure. Allow the glue to cure to ensure that all parts are firmly bonded together. Perform a quality inspection on the completed corrugated cardboard to ensure that there is no glue residue, the folding groove 11 is in the correct position, the buffer 4 is installed in place, and the corrugated cardboard is not torn or damaged. Package the qualified corrugated cardboard and store it in a dry, well-ventilated environment to maintain its performance.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tear-resistant corrugated cardboard, comprising two panels (1), wherein the two panels (1) hold a corrugated board (2) and a substrate (3) on opposite sides, characterized in that: Both panels (1) have a folded groove (11) in the middle section. The number of corrugated plates (2) is two, and the substrate (3) is sandwiched between the two corrugated plates (2) on opposite sides; The corrugated board (2) and the base plate (3) are both broken and embedded with buffer components (4). The buffer components (4) include vulcanized rubber strips (41), and each of the four corners of the vulcanized rubber strips (41) is provided with a limiting card (42).

2. The tear-resistant corrugated cardboard according to claim 1, characterized in that, Both panels (1) have a wear-resistant layer on the side facing away from the corrugated board (2), and both panels (1) are glued to the corrugated board (2) on the side close to the corrugated board (2).

3. The tear-resistant corrugated cardboard according to claim 1, characterized in that, Both of the corrugated boards (2) include a core paper layer (22), and a waterproof layer (21) is attached to the outside of the core paper layer (22) by adhesive.

4. The tear-resistant corrugated cardboard according to claim 1, characterized in that, The substrate (3) includes a first paperboard (31) and a second paperboard (32). The first paperboard (31) and the second paperboard (32) are both designed with a wavy structure on opposite sides. The first paperboard (31) and the second paperboard (32) are glued together on opposite sides.

5. The tear-resistant corrugated cardboard according to claim 1, characterized in that, The groove (11) is located at the upper and lower ends of the buffer (4). The groove (11) on the opposite side of the two panels (1) is in contact with the vulcanized rubber strip (41) but not fixedly connected.

6. The tear-resistant corrugated cardboard according to claim 1, characterized in that, The vulcanized rubber strip (41) adopts an X-shaped structure design, and the four corners of the vulcanized rubber strip (41) are respectively embedded in the limiting card (42).

7. The tear-resistant corrugated cardboard according to claim 1, characterized in that, The number of the limiting clips (42) is four, and the side of the four limiting clips (42) facing away from the vulcanized rubber strip (41) is snapped and installed with the corrugated plate (2) and the base plate (3).

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