High-toughness corrugated board

Abstract

The utility model discloses a high-toughness corrugated board, which relates to the technical field of corrugated boards and comprises a corrugated board body, the corrugated board body comprises an outer layer board, an inner layer board and middle layer boards, the middle layer boards are arranged on two sides of the inner layer board, the middle layer boards are wavy, the outer layer board is arranged on one side of each middle layer board far away from the inner layer board, and the outer layer board is arranged on the other side of each middle layer board. A first reinforcing rib is fixedly connected between the outer sides of the middle-layer plates, one end of the first reinforcing rib is fixedly connected with a second reinforcing rib, the other end of the second reinforcing rib is fixedly connected with the inner-layer plate, the first reinforcing rib and the second reinforcing rib are in a T shape, reinforcing columns are arranged in the middle-layer plates in a penetrating mode, and connecting plates are fixedly connected to the two ends of the reinforcing columns and the two ends of the middle-layer plates. By the adoption of the structure, the compressive strength and the bearing capacity of the corrugated board are remarkably improved, the corrugated board can have the higher impact resistance, and meanwhile the corrugated board can still keep the complete structure and the stable performance after being used for a long time and recycled for multiple times.

Description

Technical Field

[0001] This utility model belongs to the field of corrugated cardboard, and specifically relates to high-toughness corrugated cardboard. Background Technology

[0002] Corrugated cardboard, also known as corrugated paperboard, is a multi-layered laminate consisting of at least one layer of corrugated core paper and one or more layers of cardboard bonded together. It possesses high mechanical strength, can withstand impacts and drops during handling, and is lightweight, durable, and easy to handle and store. The number of core paper and cardboard layers in corrugated cardboard can be combined according to requirements, such as exposed corrugated cardboard, single-wall corrugated cardboard, double-wall corrugated cardboard, triple-wall corrugated cardboard, etc. Furthermore, the flute size on the core paper also comes in various specifications, such as "A" flute, "B" flute, "C" flute, and "E" flute.

[0003] Announcement No. "CN220643657U" discloses a high-strength corrugated cardboard, relating to the field of corrugated cardboard technology. It includes two symmetrically arranged surface layers, with a partition between the two surface layers. A corrugated core paper interlayer is located between both sides of the two surface layers and the partition. Multiple reinforcing rods are inserted inside each of the two corrugated core paper interlayers. Connecting blocks are fixed at both ends of each reinforcing rod, and the connecting blocks are located between the surface layer and the corrugated core paper interlayer. Grooves are formed on the sidewalls of the connecting blocks, and a positioning mechanism is provided between the connecting blocks and the surface layers. This invention improves the toughness of the corrugated cardboard, minimizing the risk of bending under external pressure. The positioning mechanism stably positions the reinforcing rods between the corrugated core paper interlayer and the surface layer, while also facilitating assembly and disassembly.

[0004] While the aforementioned utility model can improve the toughness of corrugated cardboard and minimize bending under external pressure, and the positioning mechanism can stably position the reinforcing rod between the corrugated core paper interlayer and the surface layer, facilitating assembly and disassembly, the rubber springs have a higher density and weight compared to the corrugated cardboard. Adding rubber springs inside the corrugated cardboard increases the overall weight, which is detrimental to transportation and storage. Furthermore, the introduction of rubber springs also increases production costs. Moreover, the strength of corrugated cardboard mainly comes from the support structure of its internal core layer. Adding rubber springs inside the corrugated core paperboard alters the original support structure, thus affecting the compressive strength and stability of the corrugated cardboard. Especially under high pressure, the deformation of the rubber springs may make the corrugated cardboard more prone to deformation. Utility Model Content

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide high-toughness corrugated cardboard to solve the problem that rubber springs have a large density and weight compared to corrugated cardboard. Adding rubber springs inside the corrugated cardboard will increase the overall weight, which is not conducive to transportation and storage. At the same time, the introduction of rubber springs will also increase production costs. Moreover, the strength of corrugated cardboard mainly comes from the support structure of its internal core layer. Adding rubber springs inside the corrugated core cardboard may change the original support structure.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] High-toughness corrugated cardboard includes a corrugated cardboard body, which comprises an outer layer, an inner layer, and a middle layer. The inner layer has middle layers on both sides, and the middle layers are corrugated. An outer layer is located on the side of the middle layer away from the inner layer. A first reinforcing rib is fixedly connected between the outer sides of the middle layers. A second reinforcing rib is fixedly connected to one end of the first reinforcing rib, and the other end of the second reinforcing rib is fixedly connected to the inner layer. The first and second reinforcing ribs form a T-shape. Reinforcing posts are inserted inside each middle layer, and the middle layer is filled with reinforcing filler. Connecting plates are fixedly connected to both ends of the reinforcing posts and the middle layers. The first and second reinforcing ribs form an additional support structure between the corrugated core. When the cardboard is subjected to external force, the reinforcing ribs can support the corrugated core, preventing excessive deformation or breakage. Furthermore, the corrugated corrugated core itself already possesses good mechanical strength and elasticity, while the reinforcing ribs further enhance its structural strength, enabling the corrugated cardboard to withstand greater pressure and weight.

[0008] As a preferred technical solution, the outer layer includes a face paper layer, a waterproof layer, and a laminating layer. A waterproof layer is sprayed onto one side of the face paper layer, and a laminating layer is coated onto the other side. The waterproof layer is made of a water-soluble composite emulsion, the laminating layer is made of polyethylene, and the face paper layer is made of kraft paper. The face paper layer, made of kraft paper, possesses high tensile strength and tear resistance, effectively withstanding external pressure and impact, protecting internal items from damage. Furthermore, the kraft paper surface is smooth, flat, and hard, making it resistant to wear. The waterproof layer, also made of a water-soluble composite emulsion... The emulsion boasts advantages such as excellent performance, ease of use, non-toxicity, odorlessness, good stability, and good adaptability to temperature differences. It effectively prevents moisture from penetrating into the face paper layer or other internal structures, thus protecting the internal items from dampness and moisture. It also enhances the durability of the outer layer, resisting corrosion and degradation caused by moisture and extending the lifespan of the face paper. The coating layer, made of polyethylene, possesses high tensile strength, flexural strength, and hardness, enabling it to withstand certain external forces and pressures. Furthermore, it is visually more aesthetically pleasing, enhancing the overall quality.

[0009] As a preferred technical solution, the inner layer includes a linerboard, a moisture-proof layer, and a reinforcing layer. A reinforcing layer is located outside the linerboard, and a moisture-proof layer is located outside the reinforcing layer. The linerboard is made of cotton paperboard, the moisture-proof layer is made of polypropylene, and the reinforcing layer is made of polyester fiber. The linerboard, made of cotton paperboard, possesses high strength and toughness, significantly enhancing the overall structural strength of the corrugated cardboard. This allows the corrugated cardboard to better maintain its shape and stability when subjected to external pressure or impact. Furthermore, the cotton paperboard itself has a certain degree of elasticity and cushioning properties, enabling the corrugated cardboard to better absorb and disperse impact forces, thus protecting the internal contents from damage. The moisture-proof layer, made of polypropylene, has excellent moisture-proof properties, effectively preventing the penetration and absorption of moisture. It also has strong corrosion resistance, effectively preventing the erosion of corrosive substances such as acids, alkalis, and salts. The reinforcing layer, made of polyester fiber, has good elasticity and toughness, providing effective support and recovery force when the cardboard is bent or compressed. Moreover, its relatively low density allows for increased strength of the corrugated cardboard without significantly increasing its weight.

[0010] As a preferred technical solution, the middle layer includes a corrugated core paper layer made of unbleached hardwood semi-chemical pulp, and the reinforcing filler made of waste paper pulp. The use of unbleached hardwood semi-chemical pulp in the corrugated core paper layer, which undergoes chemical treatment and mechanical separation during manufacturing, enhances the bonding force between fibers, thus giving the corrugated core paper high strength and good physical properties, such as ring crush strength, bursting strength, and folding endurance. This allows the corrugated board to better maintain its shape and structural stability under external pressure. Furthermore, the corrugated core paper made from unbleached hardwood semi-chemical pulp has good elasticity and toughness, effectively absorbing and dispersing impact forces, thereby protecting the contents from damage. The use of waste paper pulp as reinforcing filler enables the reuse of waste paper resources, reducing deforestation of native forests and contributing to the protection of forest resources and the ecological environment. Moreover, it allows the corrugated board to maintain sufficient strength while reducing overall weight, which is beneficial for reducing transportation costs and improving logistics efficiency.

[0011] As a preferred technical solution, the two middle layers are arranged in a cross-staggered manner, and the two sets of reinforcing columns and reinforcing ribs are also arranged in a cross-staggered manner. The reinforcing columns 2 provide additional support for the corrugated paper core, effectively enhancing the overall structural strength of the paperboard. This allows the corrugated paperboard to better maintain its shape and stability when subjected to heavy objects or external pressure, and it is not easily deformed or damaged.

[0012] In summary, the present invention has the following main advantages:

[0013] In this invention, the first and second reinforcing ribs form an additional support structure between the corrugated paper core. When the paperboard is subjected to external force, the reinforcing ribs can support the corrugated paper core, preventing it from being excessively deformed or broken. Moreover, the corrugated paper core itself already has good mechanical strength and elasticity, while the reinforcing ribs further enhance its structural strength, enabling the corrugated paperboard to withstand greater pressure and weight, thereby enhancing the toughness of the entire paperboard and significantly improving its compressive strength and load-bearing capacity. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is the utility model Figure 1 Enlarged view of part A

[0016] Figure 3 This is a cross-sectional view of the outer layer plate of this utility model;

[0017] Figure 4 This is a cross-sectional view of the inner layer plate of this utility model.

[0018] Reference numerals: 1. Corrugated cardboard body; 101. Outer layer; 1011. Face paper layer; 1012. Waterproof layer; 1013. Laminated layer; 102. Inner layer; 1021. Liner paper layer; 1022. Moisture-proof layer; 1023. Reinforcing layer; 103. Middle layer; 1031. Corrugated core paper layer; 2. Reinforcing column; 3. First reinforcing rib; 4. Connecting plate; 5. Reinforcing filler; 6. Second reinforcing rib. Detailed Implementation

[0019] Example

[0020] refer to Figures 1 to 4The high-toughness corrugated cardboard described in this embodiment includes a corrugated cardboard body 1, which includes an outer layer 101, an inner layer 102, and a middle layer 103. The inner layer 102 has a middle layer 103 on both sides, and the middle layer 103 is wavy. An outer layer 101 is located on the side of the middle layer 103 away from the inner layer 102. A first reinforcing rib 3 is fixedly connected between the outer sides of the middle layer 103. A second reinforcing rib 6 is fixedly connected to one end of the first reinforcing rib 3, and the other end of the second reinforcing rib 6 is fixedly connected to the inner layer 102. The first reinforcing rib 3 and the second reinforcing rib 6 form a T-shape. Reinforcing columns 2 are inserted inside each layer 103, and reinforcing filler 5 is filled inside the middle layer 103. Connecting plates 4 are fixedly connected to both ends of the reinforcing columns 2 and the middle layer 103. An additional support structure is formed between the corrugated paper core by the first reinforcing rib 3 and the second reinforcing rib 6. When the paperboard is subjected to external force, the reinforcing rib can support the corrugated paper core and prevent it from being excessively deformed or broken. Moreover, the corrugated paper core itself already has good mechanical strength and elasticity, while the reinforcing rib further enhances its structural strength, enabling the corrugated paperboard to withstand greater pressure and weight.

[0021] refer to Figure 3 The outer layer 101 includes a face paper layer 1011, a waterproof layer 1012, and a laminated layer 1013. The face paper layer 1011 is coated with the waterproof layer 1012 on one side, and the waterproof layer 1012 is coated with the laminated layer 1013 on the other side. The waterproof layer 1012 is made of water-soluble composite emulsion, the laminated layer 1013 is made of polyethylene, and the face paper layer 1011 is made of kraft paper. The face paper layer 1011, being made of kraft paper, possesses high tensile strength and tear resistance, effectively withstanding external pressure and impact, protecting internal items from damage. Furthermore, the kraft paper surface is smooth, flat, and hard, making it resistant to wear. The waterproof layer 1012 and... The material is a water-soluble composite emulsion, which has advantages such as excellent performance, ease of use, non-toxicity, odorlessness, good stability, and good adaptability to temperature differences. It can effectively prevent moisture from penetrating into the face paper layer 1011 or other internal structures, thereby protecting the internal items from moisture and water. It also enhances the durability of the outer layer 101, resists corrosion and degradation caused by moisture, and extends the service life of the face paper. The coating layer 1013 is made of polyethylene, which has high tensile strength, flexural strength, and hardness. This allows the coating layer 1013 to withstand certain external forces and pressures, and it is also more visually appealing, improving the overall quality.

[0022] refer to Figure 4The inner layer 102 includes a linerboard 1021, a moisture-proof layer 1022, and a reinforcing layer 1023. The reinforcing layer 1023 is located outside the linerboard 1021, and the moisture-proof layer 1022 is located outside the reinforcing layer 1023. The linerboard 1021 is made of cotton paperboard, the moisture-proof layer 1022 is made of polypropylene, and the reinforcing layer 1023 is made of polyester fiber. The linerboard 1021, made of cotton paperboard, possesses high strength and toughness, significantly enhancing the overall structural strength of the corrugated cardboard. This allows the corrugated cardboard to better maintain its shape and stability when subjected to external pressure or impact. Furthermore, the cotton paperboard itself has a certain degree of elasticity and cushioning properties, which makes the corrugated cardboard... Corrugated cardboard can better absorb and disperse impact force when subjected to impact, thus protecting the contents from damage. The moisture-proof layer 1022 is made of polypropylene, which has good moisture-proof properties and can effectively prevent the penetration and absorption of moisture. It also has strong corrosion resistance and can effectively prevent the erosion of corrosive substances such as acids, alkalis, and salts. The reinforcing layer 1023 is made of polyester fiber, which has good elasticity and toughness and can provide effective support and recovery force when the cardboard is bent or compressed. Moreover, its density is relatively low. Using it as the reinforcing layer 1023 can increase the strength of the corrugated cardboard without adding too much weight.

[0023] refer to Figure 2 The middle layer 103 includes a corrugated core paper layer 1031, which is made of unbleached hardwood semi-chemical pulp. The reinforcing filler 5 is made of waste paper pulp. By setting the corrugated core paper layer 1031 to be made of unbleached hardwood semi-chemical pulp, the semi-chemical pulp undergoes chemical treatment and mechanical separation during the manufacturing process, which enhances the bonding force between fibers. This gives the corrugated core paper high strength and good physical properties, such as ring crush strength, bursting strength, and folding endurance. This allows the corrugated board to better maintain its shape and structural stability when subjected to external pressure. Moreover, the corrugated core paper made of unbleached hardwood semi-chemical pulp has good elasticity and toughness, which can effectively absorb and disperse impact force, thereby protecting the internal items from damage. By setting the reinforcing filler 5 to be made of waste paper pulp, the reuse of waste paper resources is realized, reducing the felling of native forests and helping to protect forest resources and the ecological environment. Furthermore, the corrugated board can reduce its overall weight while maintaining sufficient strength, which is conducive to reducing transportation costs and improving logistics efficiency.

[0024] refer to Figure 2 The two middle layers 103 are arranged in a cross-staggered manner, and the two sets of reinforcing columns 2 and reinforcing ribs are also arranged in a cross-staggered manner. The reinforcing columns 2 provide additional support for the corrugated paper core, effectively enhancing the overall structural strength of the paperboard. This allows the corrugated paperboard to better maintain its shape and stability when subjected to heavy objects or external pressure, and it is not easy to deform or be damaged.

[0025] Operating principle and advantages: First, the first reinforcing rib 3 and the second reinforcing rib 6 form an additional support structure between the corrugated paper core. When the paperboard is subjected to external force, the reinforcing rib can support the corrugated paper core and prevent it from being excessively deformed or broken. Moreover, the corrugated paper core itself already has good mechanical strength and elasticity, and the reinforcing rib further enhances its structural strength, enabling the corrugated paperboard to withstand greater pressure and weight. Furthermore, the reinforcing column 2 provides additional support for the corrugated paper core, effectively enhancing the overall structural strength of the paperboard.

[0026] This invention can significantly improve the compressive strength and load-bearing capacity of corrugated cardboard, giving it higher impact resistance. During transportation and storage, it can effectively protect the contents from damage caused by external pressure, ensuring the safety and integrity of the items. At the same time, it can significantly improve the durability of corrugated cardboard, enabling it to maintain its structural integrity and stable performance even after long-term use and multiple cycles, thus extending its service life.

Claims

1. A high-toughness corrugated cardboard, comprising a corrugated cardboard body, characterized in that: The corrugated cardboard body includes an outer layer, an inner layer, and a middle layer. The inner layer has middle layers on both sides, and the middle layers are wavy. The outer layer is located on the side of the middle layer away from the inner layer. A first reinforcing rib is fixedly connected between the outer sides of the middle layers. A second reinforcing rib is fixedly connected to one end of the first reinforcing rib, and the other end of the second reinforcing rib is fixedly connected to the inner layer. The first and second reinforcing ribs are T-shaped. Reinforcing posts are inserted inside the middle layers, and the middle layers are filled with reinforcing filler. Connecting plates are fixedly connected to both ends of the reinforcing posts and the middle layers.

2. The high-toughness corrugated cardboard according to claim 1, characterized in that: The outer layer includes a face paper layer, a waterproof layer, and a film layer. The face paper layer is coated with a waterproof layer on one side, and the waterproof layer is coated with a film layer on the other side.

3. The high-toughness corrugated cardboard according to claim 2, characterized in that: The waterproof layer is made of water-soluble composite emulsion, the film layer is made of polyethylene, and the face paper layer is made of kraft paper.

4. The high-toughness corrugated cardboard according to claim 1, characterized in that: The inner layer board includes a linerboard, a moisture-proof layer, and a reinforcing layer. The reinforcing layer is provided on the outside of the linerboard, and the moisture-proof layer is provided on the outside of the reinforcing layer.

5. The high-toughness corrugated cardboard according to claim 4, characterized in that: The inner paper layer is made of cotton paperboard, the moisture-proof layer is made of polypropylene, and the reinforcing layer is made of polyester fiber.

6. The high-toughness corrugated cardboard according to claim 5, characterized in that: The middle layer includes a corrugated core paper layer, which is made of unbleached hardwood semi-chemical pulp, and the reinforcing filler is made of waste paper pulp.

7. The high-toughness corrugated cardboard according to claim 6, characterized in that: The two middle-layer plates are arranged in a cross-staggered manner, and the two sets of reinforcing columns and reinforcing ribs are also arranged in a cross-staggered manner.

Images