High-strength corrugated board and manufacturing process thereof

Abstract

The invention relates to the technical field of corrugated boards, in particular to a high-strength corrugated board and a manufacturing process thereof.The high-strength corrugated board is not prone to deformation and high in tensile strength and compressive strength and comprises two sets of outer boards and a first wavy inner board, and the first wavy inner board is connected with the outer board on the upper side in an adhesive mode; a reinforcing composite layer is arranged between the first wave inner plate and the outer paper plate on the lower side, two sets of reinforcing plates are arranged on the reinforcing composite layer in parallel, the reinforcing plate on the upper side is connected with the first wave inner plate in an adhering mode, a reinforcing grid is arranged between the two sets of reinforcing plates, and a buffering assembly is arranged on the reinforcing plate on the lower side in an adhering mode. The reinforcing plate on the lower side is connected with the outer paperboard on the lower side through a buffering assembly, reinforcing columns are arranged at grid intersection points of the reinforcing grids, every two adjacent sets of reinforcing columns on the same grid line of the reinforcing grids are connected through reinforcing paperboards, grooves are formed in the grid line directions of the upper side and the lower side of the reinforcing grids, and the reinforcing columns are arranged in the grooves. Reinforcing strips are arranged in the grooves in an adhering mode.

Description

Technical Field

[0001] The present invention relates to the technical field of corrugated paperboard, in particular to a high-strength corrugated paperboard and a manufacturing process thereof. Background Art

[0002] In the modern logistics and packaging industries, corrugated cardboard is widely used for packaging various products due to its advantages such as low cost, light weight, and easy processing. However, with the continuous changes in market demand and the development of the industry, traditional corrugated cardboard has gradually exposed some shortcomings in terms of strength.

[0003] Currently, common corrugated cardboard typically consists of a face paper, a lining, and a corrugated core paper sandwiched between them. In practice, traditional corrugated cardboard often fails to meet the demand for high-strength packaging. For example, when transporting heavy or fragile items, the cardboard may deform or break due to insufficient strength, resulting in damage to the contents.

[0004] In addition, some special application scenarios, such as packaging for electronic products and precision instruments, require higher strength for corrugated cardboard. Traditional manufacturing processes cannot meet these high demands.

[0005] In order to meet the market demand for high-strength packaging materials, it is necessary to develop a high-strength corrugated cardboard and its manufacturing process to improve the strength of the corrugated cardboard so that it can better protect the items inside the package in various application scenarios. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a high-strength corrugated paperboard which is not easily deformed and has high tensile and compressive strengths, and a manufacturing process thereof.

[0007] The high-strength corrugated paperboard of the present invention comprises two groups of outer paperboards and a first wave inner board, wherein the first wave inner board is adhered to the upper outer paperboard, and a reinforcing composite layer is provided between the first wave inner board and the lower outer paperboard.

[0008] Preferably, the reinforced composite layer is provided with two groups of reinforcing plates in parallel, the upper reinforcing plate is adhered and connected to the first wave inner plate, a reinforcing grid is provided between the two groups of reinforcing plates, the lower reinforcing plate is adhered and provided with a buffer component, and the lower reinforcing plate is connected to the lower outer cardboard through the buffer component.

[0009] Preferably, the grid intersections of the reinforcement grid are provided with reinforcement columns, and two adjacent groups of reinforcement columns on the same grid line of the reinforcement grid are connected by reinforcement cardboard.

[0010] Preferably, grooves are provided in the grid line direction on both the upper and lower sides of the reinforcement grid, and reinforcement strips are adhered in the grooves.

[0011] Preferably, thickened and reinforced adhesive layers are provided on both sides of the reinforcement grid, and two sets of reinforcement plates are installed on both sides of the reinforcement grid through the thickened and reinforced adhesive layers.

[0012] Preferably, the buffer component is configured as a second wave inner plate, one side of the second wave inner plate is adhered and connected to the bottom of the reinforcing plate on the lower side, the other side of the second wave inner plate is adhered and connected to the outer paperboard on the lower side, and the wave-shaped protrusions of the second wave inner plate and the first wave inner plate are arranged in parallel and staggered.

[0013] Preferably, the reinforcement column is configured as a wound solid paper column.

[0014] Preferably, the reinforcement strip is made of polypropylene fiber, plant fiber reinforcement material or glass fiber.

[0015] A manufacturing process for high-strength corrugated cardboard, which is used to produce high-strength corrugated cardboard. The specific manufacturing process steps are: S1: Material preparation stage Prepare the required outer cardboard, first wave inner board, reinforcement board, reinforcement column material, reinforcement strip material, thickening reinforcement glue, ordinary adhesive glue and second wave inner board, and place them in the raw material storage area for easy access at any time; S2: Strengthening composite layer production stage (a) Reinforcement plate processing: Use cutting equipment to cut the reinforcement plate material into appropriate sizes according to design requirements, and then use a conveyor to transport the reinforcement plate to the reinforcement composite layer production area; (b) Reinforcement grid fabrication: On a specific mounting device, the reinforcement column material is rolled into solid paper columns. Using a pasting device, the paper reinforcement sheets are pasted between two adjacent sets of reinforcement columns on the same grid line, ensuring a secure paste. Once this is complete, a reinforcement grid is formed. (c) Press grooves along the grid lines at the top and bottom of the reinforcement grid. Then, using the groove pasting equipment, accurately paste the reinforcement strip material into the grooves along the grid lines on the upper and lower sides of the reinforcement grid, using appropriate pressure to ensure that the reinforcement strips are tightly bonded to the grooves. (d) Assembling the reinforcement plates and the reinforcement grid: Using a coating device, apply thickened reinforcement glue on both sides of the reinforcement grid. Then, using a pressing device, install the two sets of reinforcement plates on both sides of the reinforcement grid and compact and fix them to ensure that the glue is fully bonded. S3: Corrugated cardboard assembly stage (a) Adhesion of the first corrugated inner plate to the upper outer plate: The first corrugated inner plate is adhered to the upper outer plate by an adhesive device to ensure a strong bond, and then transported to the position for assembly with the reinforced composite layer by a conveyor device; (b) Assembling the reinforced composite layer with the first wave inner plate and the lower outer paperboard: Place the prepared reinforced composite layer between the first wave inner plate and the lower outer paperboard, so that the upper reinforcing plate is tightly adhered to the first wave inner plate, and the lower reinforcing plate faces downward, and use a pressing device to compact it to ensure that the layers are tightly bonded; (c) Installation of the second wave inner plate: Under the action of the gluing equipment, one side of the second wave inner plate is glued and connected to the bottom of the lower reinforcing plate, and then it is glued and connected to the lower outer paperboard to complete the assembly of the entire corrugated paperboard.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Significantly improve the strength of corrugated cardboard, better protecting the contents. Through the design of multiple reinforcement structures, such as the first wave inner board, reinforcement plates, reinforcement grids, reinforcement columns, reinforcement strips and buffer components, the corrugated cardboard can withstand greater external forces and reduce the damage rate during transportation and storage.

[0017] 2. Enhanced structural stability of corrugated cardboard. The rational connection and coordination between the various reinforcing components make the cardboard less likely to deform or collapse when subjected to external forces, maintaining good shape and performance.

[0018] 3. Good cushioning performance. The setting of the cushioning component can effectively absorb external impact, reduce the impact on internal items, and improve the reliability of corrugated cardboard during transportation.

[0019] 4. The manufacturing process is simple and feasible, and it is easy to achieve large-scale production. Through reasonable material preparation and processing steps, high-strength corrugated cardboard can be efficiently produced to meet the market demand for high-quality packaging materials.

[0020] 5. Some materials are environmentally friendly and meet the requirements of sustainable development. For example, the reinforcement strips are made of polypropylene fiber, plant fiber reinforcement materials or glass fiber, which reduces the impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic structural diagram of the reinforcement grid of the present invention; Figure 3 The present invention Figure 1 A schematic diagram of the partially enlarged structure of the middle part; Figure 4 The present invention Figure 2 A schematic diagram of the partially enlarged structure of B in the middle; Markings in the attached figure: 1, outer cardboard; 2, first wave inner board; 3, reinforcement plate; 4, reinforcement column; 5, reinforcement cardboard; 6, reinforcement strip; 7, thickened reinforcement glue layer; 8, second wave inner board. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0023] like Figures 1 to 4 As shown, a high-strength corrugated paperboard of the present invention comprises two sets of outer paperboards 1 and a first wave inner board 2. The first wave inner board 2 is adhered to the outer paperboard 1 on the upper side, and a reinforcing composite layer is provided between the first wave inner board 2 and the outer paperboard 1 on the lower side. The first corrugated inner sheet 2 and the reinforced composite layer effectively enhance the strength of the corrugated cardboard. The adhesive connection between the first corrugated inner sheet 2 and the outer cardboard 1 and the reinforced composite layer increase the structural stability of the cardboard, enabling it to better withstand external forces and protect the contents.

[0024] As a preferred embodiment of the above embodiment, the reinforced composite layer is provided with two sets of reinforcing plates 3 in parallel, the upper reinforcing plate 3 is adhered and connected to the first wave inner plate 2, a reinforcing grid is provided between the two sets of reinforcing plates 3, and a buffer component is adhered and provided on the lower reinforcing plate 3, and the lower reinforcing plate 3 is connected to the lower outer paperboard 1 through the buffer component; The design of two parallel sets of reinforcing plates 3 and the reinforcing grid further enhances the strength of the corrugated cardboard. The reinforcing grid between the reinforcing plates 3 disperses external forces, improving the cardboard's resistance to pressure and impact. Furthermore, the buffer component reduces the impact of external forces on the cardboard, protecting the contents inside.

[0025] As a preferred embodiment of the above, the grid intersections of the reinforcement grid are provided with reinforcement columns 4, and two adjacent groups of reinforcement columns 4 on the same grid line of the reinforcement grid are connected by reinforcement paperboards 5; Reinforcement columns 4 are installed at the intersections of the reinforced grid, and adjacent reinforcement columns 4 are connected by reinforcing paperboard 5, which enhances the structural stability of the grid. The reinforcement columns 4 can withstand greater stress, preventing the grid from deforming or collapsing under stress, thereby improving the overall strength of the corrugated paperboard.

[0026] As a preferred embodiment of the above, grooves are provided on the upper and lower sides of the reinforcement grid in the direction of the grid lines, and reinforcement strips 6 are adhered in the grooves; Grooves are provided on the upper and lower sides of the reinforcement grid, along the grid lines, and reinforcement strips 6 are affixed within the grooves, increasing the strength and rigidity of the reinforcement grid. The reinforcement strips 6 further disperse external forces, improving the cardboard's resistance to stretching and bending. Furthermore, the grooves ensure that the reinforcement strips 6 are better secured to the grid, preventing them from falling off.

[0027] As a preferred embodiment of the above, both sides of the reinforcement grid are provided with thickened reinforcement adhesive layers 7, and two sets of reinforcement plates 3 are installed on both sides of the reinforcement grid through the thickened reinforcement adhesive layers 7; Thickened and reinforced adhesive layers 7 are provided on both sides of the reinforcement grid to strengthen the connection between the reinforcement plate 3 and the reinforcement grid. The thickened and reinforced adhesive layers 7 can improve the bonding strength between the layers and prevent delamination during use, thereby ensuring the overall performance of the corrugated board.

[0028] As a preferred embodiment of the above embodiment, the buffer component is configured as a second corrugated inner plate 8, one side of the second corrugated inner plate 8 is adhered to the bottom of the reinforcing plate 3 on the lower side, and the other side of the second corrugated inner plate 8 is adhered to the outer paperboard 1 on the lower side, and the wave-shaped protrusions of the second corrugated inner plate 8 and the first corrugated inner plate 2 are arranged in parallel and staggered; The second wave inner plate 8, which acts as a buffer component, effectively absorbs external impacts and reduces damage to the corrugated cardboard. The elasticity of the second wave inner plate 8 relieves external pressure and protects the contents. It also increases the cardboard's cushioning properties, improving its reliability during transportation and storage.

[0029] As a preference of the above embodiment, the reinforcement column 4 is configured as a wound solid paper column; The reinforcement column 4 is set as a wound solid paper column, which improves the strength and stability of the reinforcement column 4. The solid paper column can withstand greater pressure and impact and is not easily deformed or damaged, thereby enhancing the structural strength of the reinforcement grid and further improving the overall performance of the corrugated cardboard.

[0030] As a preferred embodiment of the above, the material of the reinforcement strip 6 is set to polypropylene fiber, plant fiber reinforcement material or glass fiber; The reinforcement strip 6 is made of polypropylene fiber, plant fiber reinforced material or glass fiber, which has high strength and toughness and can effectively enhance the strength of the reinforcement grid. At the same time, these materials have good environmental performance and are in line with the development trend of modern packaging materials.

[0031] A manufacturing process for high-strength corrugated cardboard, which is used to produce high-strength corrugated cardboard. The specific manufacturing process steps are: S1: Material preparation stage Prepare the required outer paperboard 1, first wave inner board 2, reinforcement board 3, reinforcement column 4 material, reinforcement strip 6 material, thickening reinforcement glue, ordinary adhesive glue and second wave inner board 8, and place them in the raw material storage area for easy access at any time; S2: Strengthening composite layer production stage (a) Processing of the reinforcement plate 3: Using cutting equipment, the reinforcement plate 3 material is cut into appropriate sizes according to the design requirements, and then the reinforcement plate 3 is transported to the reinforcement composite layer production area by a conveyor; (b) Reinforcement grid production: On a specific installation device, the reinforcement column 4 material is rolled into a solid paper column. With the help of a pasting device, the reinforcement cardboard 5 is pasted between two adjacent groups of reinforcement columns 4 on the same grid line, ensuring that the pasting is firm. After pasting is completed, a reinforcement grid is formed; (c) Press grooves along the grid lines at the top and bottom of the reinforcement grid. Then, using the groove pasting equipment, accurately paste the reinforcement strips 6 into the grooves along the grid lines on the upper and lower sides of the reinforcement grid, using appropriate pressure to ensure that the reinforcement strips 6 are tightly bonded to the grooves. (d) Assembling the reinforcing plates 3 and the reinforcing grid: Apply thickened reinforcing glue to both sides of the reinforcing grid using a coating device, then use a pressing device to install the two sets of reinforcing plates 3 on both sides of the reinforcing grid and compact and fix them to ensure that the glue is fully bonded; S3: Corrugated cardboard assembly stage (a) Adhere the first corrugated inner sheet 2 to the upper outer paperboard 1: Adhere the first corrugated inner sheet 2 to the upper outer paperboard 1 by means of an adhesive device to ensure a strong bond, and then transport the first corrugated inner sheet 2 to a position for assembly with the reinforced composite layer by means of a conveyor device; (b) Assembling the reinforced composite layer with the first corrugated inner plate 2 and the lower outer paperboard 1: Place the prepared reinforced composite layer between the first corrugated inner plate 2 and the lower outer paperboard 1, so that the upper reinforcing plate 3 is tightly adhered to the first corrugated inner plate 2, with the lower reinforcing plate 3 facing downward, and compact it using a pressing device to ensure that the layers are tightly bonded; (c) Installation of the second wave inner plate 8: Under the action of the adhesive device, one side of the second wave inner plate 8 is adhered and connected to the bottom of the lower reinforcing plate 3, and then it is adhered and connected to the lower outer paperboard 1 to complete the assembly of the entire corrugated paperboard.

[0032] The terms "vertical," "horizontal," "left," "right," and the like are used herein for descriptive purposes only.

[0033] The "first", "second" and "third" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-strength corrugated paperboard, comprising two sets of outer paperboards (1) and a first wave inner board (2), characterized in that: The first wave inner plate (2) is adhesively connected to the outer paperboard (1) on the upper side, and a reinforcing composite layer is provided between the first wave inner plate (2) and the outer paperboard (1) on the lower side.

2. A high-strength corrugated paperboard as claimed in claim 1, characterized in that: The reinforced composite layer is provided with two groups of reinforcing plates (3) in parallel, the upper reinforcing plate (3) is adhesively connected to the first wave inner plate (2), a reinforcing grid is provided between the two groups of reinforcing plates (3), the lower reinforcing plate (3) is adhesively provided with a buffer component, and the lower reinforcing plate (3) is connected to the lower outer paperboard (1) via the buffer component.

3. A high-strength corrugated paperboard as claimed in claim 2, characterized in that: Reinforcement columns (4) are provided at the grid intersections of the reinforcement grid, and two adjacent groups of reinforcement columns (4) on the same grid line of the reinforcement grid are connected via reinforcement paperboards (5).

4. A high-strength corrugated paperboard as claimed in claim 3, characterized in that: Grooves are provided in the grid line direction on the upper side and the lower side of the reinforcement grid, and reinforcement strips (6) are adhered and arranged in the grooves.

5. A high-strength corrugated paperboard as claimed in claim 4, characterized in that: Thickened reinforcing adhesive layers (7) are provided on both sides of the reinforcing grid, and two groups of reinforcing plates (3) are installed on both sides of the reinforcing grid via the thickened reinforcing adhesive layers (7).

6. A high-strength corrugated paperboard as claimed in claim 2, characterized in that: The buffer component is configured as a second corrugated inner plate (8), one side of the second corrugated inner plate (8) is adhesively connected to the bottom of the reinforcing plate (3) on the lower side, and the other side of the second corrugated inner plate (8) is adhesively connected to the outer paperboard (1) on the lower side.

7. The high-strength corrugated paperboard according to claim 3, characterized in that: The reinforcement column (4) is configured as a wound solid paper column.

8. The high-strength corrugated paperboard according to claim 4, characterized in that: The material of the reinforcement strip (6) is set to be polypropylene fiber, plant fiber reinforcement material or glass fiber.

9. A process for manufacturing high-strength corrugated paperboard, characterized in that: The process is used to produce the high-strength corrugated paperboard as described in any one of claims 1 to 8, and the specific manufacturing process steps are: S1: Material preparation stage Prepare the required outer paperboard (1), first wave inner board (2), reinforcing board (3), reinforcement column (4) material, reinforcement strip (6) material, thickening reinforcement glue, common adhesive glue and second wave inner board (8), and place them in the raw material storage area for easy access at any time; S2: Strengthening composite layer production stage (a) Processing of the reinforcement plate (3): using a cutting device to cut the reinforcement plate (3) material into suitable sizes according to design requirements, and then transporting the reinforcement plate (3) to the reinforcement composite layer production area through a conveying device; (b) Reinforcement grid production: On a specific installation device, the reinforcement column (4) material is rolled into a solid paper column, and under the action of a pasting device, the reinforcement paperboard (5) is pasted between two adjacent groups of reinforcement columns (4) on the same grid line to ensure that the pasting is firm. After the pasting is completed, a reinforcement grid is formed; (c) Grooves are pressed out along the grid lines at the top and bottom of the reinforcing grid, and then the reinforcing strip (6) material is accurately pasted into the grooves in the direction of the grid lines on the upper and lower sides of the reinforcing grid using a groove pasting device, and appropriate pressure is used to ensure that the reinforcing strip (6) is tightly combined with the grooves; (d) Assembling the reinforcing plate (3) and the reinforcing grid: applying thickened reinforcing glue on both sides of the reinforcing grid by means of a coating device, and then using a pressing device to install the two sets of reinforcing plates (3) on both sides of the reinforcing grid, compacting and fixing them so that the glue is fully bonded; S3: Corrugated cardboard assembly stage (a) Adhesion of the first wave inner plate (2) to the upper outer paperboard (1): the first wave inner plate (2) is adhered to the upper outer paperboard (1) by an adhesive device to ensure a firm bond, and then the first wave inner plate (2) is transported to a position for assembly with the reinforced composite layer by a conveying device; (b) Assembling the reinforced composite layer with the first wave inner plate (2) and the lower outer paperboard (1): placing the prepared reinforced composite layer between the first wave inner plate (2) and the lower outer paperboard (1), so that the upper reinforcing plate (3) and the first wave inner plate (2) are tightly adhered and connected, and the lower reinforcing plate (3) faces downward, and is compacted by a pressing device to ensure that each layer is tightly bonded; (c) Installation of the second corrugated inner plate (8): Under the action of the adhesive device, one side of the second corrugated inner plate (8) is adhesively connected to the bottom of the lower reinforcing plate (3), and then it is adhesively connected to the lower outer paperboard (1), completing the assembly of the entire corrugated paperboard.

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