Paperboard piece and packaging box

Abstract

The utility model relates to a paperboard piece and a packaging box. The paperboard piece comprises a hard paperboard and grid supporting paper. The hardboards are arranged on the two sides of the grid supporting paper respectively in the thickness direction of the hardboards. The elastic modulus of the hardboard is larger than that of the grid supporting paper. The grid supporting paper comprises a net knot part, hollow holes and a transition connecting part. The net knot part comprises a first connecting part and a second connecting part. One of the hardboards on the two sides of the grid supporting paper is connected with the first connecting part, and the other hardboard is connected with the second connecting part. And a transition connecting part is arranged between any two adjacent net knot parts. And a gap is formed between the transition connecting part and the hardboard. According to the paperboard piece, the machining cost of the paperboard piece can be reduced.

Description

Technical Field

[0001] This application relates to the field of packaging technology, and in particular to a cardboard part and a packaging box. Background Technology

[0002] In related technologies, composite paperboard includes two face sheets and an intermediate paper product. An intermediate paper product is placed between the two face sheets. The face sheets are generally thinner and lighter, while the intermediate paper product can be made of paperboard material. Because existing intermediate paper products are generally thicker, heavier, and more rigid, they mainly serve a supporting and cushioning function; for example, corrugated paper is commonly used. The corrugated paper is generally wavy. Typically, 1 meter of composite paperboard requires 1.5 meters of corrugated paper. The relatively large amount of corrugated paper used also makes the composite paperboard heavier per unit volume. The intermediate paper product can also be, for example, a rigid three-dimensional honeycomb paper. Three-dimensional honeycomb paper includes multiple honeycomb-shaped through-holes. The two face sheets cover two openings of each through-hole. Three-dimensional honeycomb paper can be formed by sequentially bonding multiple sheets of rigid paper, with adjacent sheets forming a row of honeycomb-shaped through-holes. The processing steps for three-dimensional honeycomb paper are relatively complex, affecting the processing cost of composite paperboard. Utility Model Content

[0003] This application provides a cardboard part and a packaging box, which helps to reduce the processing cost of the cardboard part.

[0004] This application provides a cardboard component for packaging boxes. The cardboard component includes cardboard and a grid support paper. Cardboard is disposed on both sides of the grid support paper along the thickness direction of the cardboard. The elastic modulus of the cardboard is greater than that of the grid support paper. The grid support paper includes a knot, perforations, and a transition connection. The knot includes a first connection and a second connection. One of the cardboard sections on both sides of the grid support paper is connected to the first connection, and the other is connected to the second connection. A transition connection is disposed between any two adjacent knots. There is a gap between the transition connection and the cardboard.

[0005] In the cardboard component of this application embodiment, a grid support paper is sandwiched between the cardboard on both sides. The grid support paper is a grid paper with perforations. The grid support paper itself has a relatively small unit volume weight, which helps to reduce the unit volume weight of the cardboard component, thereby helping to reduce the overall weight of the cardboard component. The grid support paper can support the cardboard on both sides, improving the impact and compression resistance of the cardboard on both sides. When the cardboard is subjected to impact or compression force, the force can be dispersed and buffered by the grid support paper. The grid support paper includes multiple mesh knots. Multiple mesh knots are arranged circumferentially around each perforation. The cardboard on both sides is connected to the mesh knots of the grid support paper respectively. When the cardboard is subjected to impact or compression force, the cardboard can transmit the force to the grid support paper through the mesh knots, and the force can be dispersed and buffered by the grid support paper. The grid support paper itself has a relatively simple structure, is easy to process and form, and helps to reduce the processing cost of the cardboard component.

[0006] In some feasible methods, the grid support paper is made of paper and is a one-piece molded three-dimensional structure, which helps to improve the overall structural strength of the grid support paper and enhance its overall energy buffering capacity. The grid support paper can be integrally set between the two cardboard sheets and connected to them, reducing the difficulty of splicing and assembling the grid support paper and cardboard.

[0007] In some feasible methods, the grid support paper comprises multiple strips of paper that are interconnected to form a grid knot, perforations, and transition joints.

[0008] After the grid support paper is formed, paper strips are formed simultaneously. The integrally formed structure of each paper strip allows the grid knot to be a single, unified structure. If the paper strips are spliced ​​together, they overlap at the grid knot, increasing the thickness of the knot. Furthermore, connecting structures (such as adhesive) are needed at the knot to connect the paper strips, increasing the difficulty of forming the grid support paper. Additionally, during the transfer, storage, or use of the cardboard parts, the paper strips may detach at the grid knot, leading to connection failure. In this embodiment, the grid support paper is integrally formed, which helps solve the above-mentioned technical problems. The thickness at the grid knot is relatively small, and the paper strips are stably connected at the grid knot, making them less prone to detachment.

[0009] In some feasible ways, the thickness of the cardboard is D1 and the thickness of the paper strip is D2, where D1 > D2.

[0010] Compared to paper strips, cardboard is relatively thicker, resulting in higher structural strength and better resistance to impact, compression, and deformation. Conversely, paper strips are relatively thinner, making the grid support paper lighter overall, thus reducing the overall weight of the cardboard component. Furthermore, the amount of grid support paper used is relatively small, reducing processing costs.

[0011] In some feasible ways, the thickness of the cardboard and the thickness of the paper strip satisfy the following relationship: 7D2≥D1≥5D2.

[0012] In some feasible methods, the structure of the grid support paper is as follows: along the transverse direction of the paper, multiple rows of longitudinal slots are provided on the paper, each row of longitudinal slots includes multiple longitudinal slots, and the longitudinal slots of adjacent rows are staggered. Along the transverse direction of the paper, when the two ends of the paper are stretched, the longitudinal slots are torn open, and the paper between two adjacent longitudinal slots is twisted under the stretching action to form the grid support paper.

[0013] Mesh support paper is generally quite soft. It is typically used directly in packaging to cushion and wrap products for easier transport; therefore, those skilled in the art are limited to its direct use in product packaging for cushioning. In this embodiment, the mesh support paper is connected to cardboard to manufacture cardboard components, achieving weight reduction and pressure resistance. Thus, cardboard components, as raw materials for packaging boxes, can achieve overall weight reduction and pressure resistance, meeting various performance requirements of existing packaging boxes, and at a low production cost.

[0014] In some feasible implementations, there is an included angle V between the transition connection and the mesh knot, where 110°≤V≤160°.

[0015] Different included angles V result in varying degrees of bending between the transition joint and the mesh knot, thus affecting their supporting function. Excessive or insufficient bending can cause the transition joint to lose its supporting capacity. In practice, the included angle can be adjusted according to actual needs.

[0016] In some feasible methods, the angle between the axial direction of the cutout and the thickness direction of the cardboard is K, where 50°≤K≤85°.

[0017] An angle K that is too large or too small may result in insufficient support from the grid support paper. In practice, the angle K can be adjusted according to actual needs.

[0018] In some feasible methods, the number of cardboard sheets is three or more, the number of grid support sheets is two or more, and the cardboard sheets and grid support sheets are alternately arranged along the thickness direction of the cardboard sheets.

[0019] The method of stacking multiple cardboard sheets and multiple grid support sheets results in a relatively large number of cardboard layers, which can help improve the overall structural strength of the cardboard and thus enhance its pressure resistance and impact deformation resistance.

[0020] In some feasible methods, two or more grid support papers are placed between two adjacent cardboards, and the two or more grid support papers are stacked along the thickness direction of the cardboard.

[0021] By setting two or more grid support papers between two adjacent cardboard pieces, the force can be dispersed and buffered when the cardboard is subjected to impact or compression, which helps to improve the overall impact resistance of the cardboard.

[0022] In some feasible methods, the cardboard on both sides of the grid support paper is arranged parallel to each other, the thickness of the cardboard is D1, and the vertical distance between the cardboard on both sides of the grid support paper is D3, where D3 > D1.

[0023] The maximum thickness of the grid support paper can be equal to the vertical spacing D3 between the cardboard on both sides of the grid support paper. A relatively thick grid support paper can be placed between the cardboard sides to ensure good support performance and deformation buffering. At the same time, the overall thickness of the cardboard component can be adjusted by flexibly selecting a suitable thickness of grid support paper according to product requirements. Since the grid support paper itself is relatively lightweight, adjusting the overall thickness of the cardboard component by adjusting the thickness of the grid support paper will not significantly increase the overall weight of the cardboard component.

[0024] In some feasible methods, the thickness of the cardboard is D1, and the vertical spacing between the cardboard on both sides of the grid support paper is D3, where 6D1≥D3≥4D1.

[0025] In some feasible ways, one of the cardboard pieces on either side of the grid support paper is bonded to the first connecting part, and the other is bonded to the second connecting part.

[0026] The connection method between the cardboard and the grid support paper is simple, reducing the difficulty of connecting the cardboard and the grid support paper.

[0027] In some feasible methods, the grid support paper is kraft paper.

[0028] The grid support paper itself has good flexibility, which makes its structure stable and not easily deformed, and has good support capacity. At the same time, the grid support paper can be naturally degraded and will not cause pollution to the environment.

[0029] This application provides a packaging box that includes cardboard components as described in the above embodiments. Attached Figure Description

[0030] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0031] Figure 1 This is a schematic diagram of the structure of a cardboard component according to an embodiment of this application;

[0032] Figure 2 This is an exploded structural diagram of a cardboard component according to an embodiment of this application;

[0033] Figure 3 This is a partial structural schematic diagram of a cardboard component according to an embodiment of this application;

[0034] Figure 4 yes Figure 3 A partial structural diagram of the cardboard component viewed from above along its thickness direction;

[0035] Figure 5 yes Figure 2 Enlarged view of point M in the middle;

[0036] Figure 6 This is a schematic diagram of the structural forming process of the grid support paper according to an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the structure of a cardboard component according to an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the structure of a cardboard component according to an embodiment of this application.

[0039] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10. Cardboard parts;

[0042] 20. Cardboard;

[0043] 30. Grid support paper; 301. Paper strip; 31. Knot section; 311. First connecting part; 312. Second connecting part; 32. Hole; 33. Transition connecting part;

[0044] 100. Paper;

[0045] 110. Longitudinal groove;

[0046] X, thickness direction;

[0047] O, Axial direction. Detailed Implementation

[0048] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the allowable tolerance range. "Parallel" is not parallel in the strict sense, but within the allowable tolerance range.

[0050] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0051] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] Figure 1 The structure of the cardboard part 10 is shown schematically. Figure 2 The exploded structure of the cardboard part 10 is shown schematically. Figure 3 A partial structure of the cardboard part 10 is shown schematically. Figure 4 schematically shown Figure 3 Partial structure of the cardboard component 10 viewed from above along the thickness direction X. Figure 5 schematically shown Figure 2 A magnified view of point M in the middle. (See below for reference.) Figures 1 to 5 The embodiments of this application are described below.

[0053] See Figures 1 to 5 As shown, this application embodiment provides a cardboard component 10 for packaging boxes. The cardboard component 10 includes cardboard 20 and mesh support paper 30.

[0054] Along the thickness direction X of the cardboard 20, cardboard 20 is respectively arranged on both sides of the grid support paper 30. The cardboard 20 on both sides of the grid support paper 30 is spaced apart. An accommodating space is formed between the cardboard 20 on both sides of the grid support paper 30. The grid support paper 30 is disposed within the accommodating space. The grid support paper 30 is sandwiched between the cardboard 20 on both sides of the grid support paper 30. The elastic modulus of the cardboard 20 is greater than that of the grid support paper 30. The grid support paper 30 includes a knot portion 31, a perforation 32, and a transition connection portion 33. The knot portion 31 includes a first connection portion 311 and a second connection portion 312. One of the cardboard 20 on both sides of the grid support paper 30 is connected to the first connection portion 311, and the other is connected to the second connection portion 312. A transition connection portion 33 is provided between any two adjacent knot portions 31. There is a gap between the transition connection portion 33 and the cardboard 20.

[0055] In the cardboard component 10 of this application embodiment, a grid support paper 30 is sandwiched between the cardboard 20 on both sides. The grid support paper 30 is a grid paper with perforations 32. The grid support paper 30 itself has a relatively small unit volume weight, which is beneficial to reducing the unit volume weight of the cardboard component 10, thereby reducing the overall weight of the cardboard component 10. The grid support paper 30 can support the cardboard 20 on both sides, improving the impact and compression resistance of the cardboard 20 on both sides. When the cardboard 20 is subjected to impact or compression force, the force can be dispersed and buffered through the grid support paper 30. The grid support paper 30 includes multiple mesh knots 31. Multiple mesh knots 31 are arranged circumferentially around each perforation 32. The cardboard 20 on both sides is connected to the mesh knots 31 of the grid support paper 30 respectively. When the cardboard 20 is subjected to impact or compression force, the cardboard 20 can transmit the force to the grid support paper 30 through the mesh knots 31, and the force can be dispersed and buffered through the grid support paper 30. The grid support paper 30 has a relatively simple structure and is easy to process and form, which helps to reduce the processing cost of the paperboard 10.

[0056] The mesh section 31 includes a first connecting portion 311 and a second connecting portion 312. Along the thickness direction X of the cardboard 20, the first connecting portion 311 is close to one side of the cardboard 20, while the second connecting portion 312 is close to the other side of the cardboard 20. One of the cardboard sections 20 on both sides is connected to the first connecting portion 311, and the other is connected to the second connecting portion 312.

[0057] The knot section 31 is inclined. A first connecting portion 311 and a second connecting portion 312 of the knot section 31 are spaced apart. The knot section 31 can be simultaneously connected to the cardboard 20 on both sides via the first connecting portion 311 and the second connecting portion 312. The cardboard 20 on both sides provides support for the knot section 31, which helps improve the connection stability and reliability of the knot section 31. Simultaneously, the knot section 31 pulls on both sides of the cardboard 20. When the cardboard 20 is subjected to impact or compression, the cardboard 20 can transmit the force to the mesh support paper 30 through the knot section 31, which helps improve the buffering and energy absorption effect.

[0058] The grid support paper 30 includes transition connecting portions 33. A transition connecting portion 33 is provided between any two adjacent grid knots 31. There is a gap between the transition connecting portion 33 and the cardboard 20. The transition connecting portion 33 and the cardboard 20 can be in a non-connected state. The transition connecting portion 33 can be in a suspended state. Each grid knot 31 is connected to multiple transition connecting portions 33. When the cardboard 20 is subjected to impact or compression, the cardboard 20 can transmit the force to the grid knot 31, and then the grid knot 31 can transmit the force to the transition connecting portion 33, thereby dispersing and buffering the force.

[0059] For example, four mesh sections 31 can be provided around a perforated hole 32. Each mesh section 31 can be connected to four transition connecting sections 33.

[0060] For example, there is a gap between the transition connection 33 and the cardboard 20. Different cutouts 32 can be connected through this gap.

[0061] The elastic modulus of the cardboard 20 is greater than that of the grid support paper 30. The grid support paper 30 itself is flexible. When the cardboard 20 is subjected to external forces, the grid support paper 30 is relatively easier to compress and deform than the cardboard 20, thus effectively dispersing and buffering the external forces. When the cardboard 20 itself is subjected to external forces, the stiffer cardboard 20 is less prone to collapse, deformation, or damage than the grid support paper 30, which helps to improve the impact and compression resistance of the cardboard part 10.

[0062] Because the cardboard 20 on both sides is relatively stiff, only when a relatively large force is applied to the cardboard 20 can the cardboard piece 10 bend or break as a whole. Therefore, the packaging box made using the cardboard piece 10 of this application embodiment can maintain its structure and is not easily deformed, and has good impact resistance and compression resistance.

[0063] In some feasible methods, the grid support paper 30 is made of paper and is a one-piece molded three-dimensional structure, which helps to improve the overall structural strength of the grid support paper 30 and enhance its overall energy buffering capacity. The grid support paper 30 can be integrally set between the two cardboard boxes 20 and connected to them, reducing the difficulty of splicing and assembling the grid support paper 30 and the cardboard boxes 20.

[0064] In some feasible methods, the grid support paper 30 can be kraft paper. The grid support paper 30 itself has good flexibility, which makes its structure stable and not easily deformed, and has good support capacity. At the same time, the grid support paper 30 can be naturally degraded and will not cause pollution to the environment.

[0065] See also some of the possible implementation methods. Figure 5 As shown, the grid support paper 30 includes multiple paper strips 301. The paper strips 301 are interconnected to form a mesh knot 31, a perforated hole 32, and a transition connection 33. The paper strips 301 have a simple structure and relatively low weight, which helps to reduce the processing difficulty and overall weight of the grid support paper 30.

[0066] The grid support paper 30 is a one-piece molded three-dimensional structure. After the grid support paper 30 is formed, paper strips 301 are simultaneously formed. The one-piece molding structure between the various paper strips 301 allows the mesh knot 31 to be a single, integral structure. If the various paper strips 301 are spliced ​​together, the paper strips 301 overlap at the mesh knot 31, increasing the thickness of the mesh knot 31. Furthermore, a connecting structure (e.g., adhesive) needs to be provided at the mesh knot 31 to connect the paper strips 301, increasing the processing difficulty of the grid support paper 30. Additionally, during the transfer, storage, or use of the cardboard part 10, the paper strips 301 may detach at the mesh knot 31, leading to connection failure. In this embodiment, the one-piece molding of the grid support paper 30 helps solve the above-mentioned technical problems. The thickness at the mesh knot 31 is relatively small, and the paper strips 301 are stably connected at the mesh knot 31, making them less prone to detachment.

[0067] In some feasible ways, the thickness of the cardboard 20 itself is D1, and the thickness of the paper strip 301 itself is D2, where D1 > D2.

[0068] Compared to paper strip 301, cardboard 20 is relatively thicker, resulting in higher structural strength and better resistance to impact, compression, and deformation. Conversely, compared to cardboard 20, paper strip 301 is relatively thinner, making the overall weight of the grid support paper 30 lighter, thus reducing the overall weight of the cardboard component 10. Furthermore, the amount of material used in the grid support paper 30 is relatively small, which helps reduce processing costs.

[0069] In some examples, the thickness of the cardboard 20 and the thickness of the paper strip 301 satisfy the following relationship: 7D2 ≥ D1 ≥ 5D2. The thickness of each paper strip 301 can be equal, which helps to ensure that the load-bearing capacity and structural strength of each paper strip 301 tend to be consistent.

[0070] In some examples, the grid support paper 30 is made of paper and is a one-piece molded three-dimensional structure. The thickness of the grid knot 31 is the same as the thickness of the paper strip 301.

[0071] In some examples, the thickness D2 of the paper strip 301 can range from 0.1 mm to 0.3 mm. The thickness D1 of the cardboard 20 can range from 0.5 mm to 2 mm. For example, the thickness D1 of the cardboard 20 can be 1 mm, 1.5 mm, or 2 mm.

[0072] In some feasible ways, Figure 6 The structural forming process of the grid support paper 30 is illustrated schematically. See also Figure 6 As shown, the structure of the grid support paper 30 is as follows: along the transverse direction of the paper 100, multiple rows of longitudinal slots 110 are provided on the paper 100. Each row of longitudinal slots 110 includes multiple longitudinal slots 110. The longitudinal slots 110 of adjacent rows are staggered. Along the transverse direction of the paper 100, when the two ends of the paper 100 are stretched, the longitudinal slots 110 are torn open, and the paper 100 between two adjacent longitudinal slots 110 is twisted under the stretching action to form a three-dimensional grid support paper 30.

[0073] The mesh support paper 30 is generally quite soft. It is typically used directly in packaging to cushion and wrap products for easier transport. Therefore, those skilled in the art are generally limited to its direct use in product packaging for cushioning. In this embodiment, the mesh support paper 30 is connected to the cardboard 20 to manufacture the cardboard component 10, achieving weight reduction and pressure resistance. Thus, the cardboard component 10, as a raw material for packaging boxes, achieves overall weight reduction and pressure resistance, meeting various performance requirements of existing packaging boxes, and at a low production cost.

[0074] In some examples, the paper 100 may be, but is not limited to, kraft paper. The paper 100 itself has good flexibility and is biodegradable, causing no pollution to the environment. The thickness of the paper 100 itself may be equal to the thickness D2 of the paper strips 301 in the formed grid support paper 30.

[0075] See also some of the possible implementation methods. Figure 5As shown, there is an included angle V between the transition connection and the knot, for example, 110°≤V≤160°. Different included angles V result in different degrees of bending between the transition connection 33 and the knot 31, thus affecting their supporting function. Excessive or insufficient bending may cause the transition connection 33 to lose its supporting capacity. In practice, the size of the included angle V can be adjusted according to actual needs.

[0076] See also some of the possible implementation methods. Figure 5 As shown, the cardboard 20 on both sides does not block the perforated hole 32. The axial direction O of the perforated hole 32 is different from the thickness direction X of the cardboard 20. There is an angle between the axial direction O of the perforated hole 32 and the thickness direction X of the cardboard 20.

[0077] See in some examples Figure 5 As shown, the angle between the axial direction O of the perforated hole 32 and the thickness direction X of the cardboard 20 is K, for example, 50° ≤ K ≤ 85°. For example, the angle K between the axial direction O of the perforated hole 32 and the thickness direction X of the cardboard 20 is equal to 55°, 60°, 70°, or 80°. An angle K that is too large or too small may result in insufficient support capacity of the grid support paper 30. In practice, the size of the angle K can be adjusted according to actual needs.

[0078] In some examples, the grid support paper 30 includes paper strips 301. An angle K that is too large or too small may result in insufficient support capacity of the paper strips 301 themselves. In practice, the size of the angle K can be adjusted according to actual needs.

[0079] In some feasible ways, Figure 7 The structure of cardboard component 10 is shown schematically. See also... Figure 7 As shown, there are three or more cardboard pieces 20. There are two or more grid support sheets 30. The cardboard pieces 20 and grid support sheets 30 are arranged alternately along the thickness direction X of the cardboard pieces 20. One grid support sheet 30 is placed between two adjacent cardboard pieces 20. Cardboard pieces 20 are placed on both sides of the grid support sheet 30.

[0080] The arrangement of multiple cardboard sheets 20 and multiple grid support sheets 30 stacked together results in a relatively large number of cardboard parts 10, which helps to improve the overall structural strength of the cardboard parts 10, thereby improving the pressure resistance and impact deformation resistance of the cardboard parts 10.

[0081] In some feasible configurations, the two cardboard sheets 20 are arranged parallel to each other. The thickness of the cardboard sheets 20 is D1. Along the thickness direction X of the cardboard sheets 20, the vertical distance between the cardboard sheets 20 on both sides of the grid support paper 30 is D3. Wherein, D3 > D1.

[0082] The maximum thickness of the grid support paper 30 can be equal to the vertical distance D3 between the cardboard 20 on both sides of the grid support paper 30. A relatively thick grid support paper 30 can be placed between the cardboard 20 on both sides to ensure good support and deformation buffering performance. At the same time, the overall thickness of the cardboard component 10 can be adjusted by flexibly selecting a suitable thickness of grid support paper 30 according to product requirements. Since the grid support paper 30 itself is relatively lightweight, adjusting the overall thickness of the cardboard component 10 by adjusting the thickness of the grid support paper 30 will not significantly increase the overall weight of the cardboard component 10.

[0083] In some examples, the thickness of the cardboard 20 itself is D1, and the vertical spacing between the cardboard 20 on both sides of the grid support paper 30 is D3, where 6D1≥D3≥4D1.

[0084] For example, the thickness D1 of the cardboard 20 itself ranges from 0.5 mm to 2 mm. For instance, the thickness D1 of the cardboard 20 itself can be 1 mm, 1.5 mm, or 2 mm. The vertical spacing D3 between the cardboard 20 on both sides of the grid support paper 30 can range from 2 mm to 12 mm. For instance, the vertical spacing D3 between the two cardboard 20 sides can be 4 mm, 7 mm, or 9 mm.

[0085] In some feasible embodiments, the two cardboard sections 20 are respectively bonded to the mesh knots 31 of the grid support paper 30. Of the two cardboard sections 20, one is bonded to the first connecting portion 311, and the other is bonded to the second connecting portion 312.

[0086] The connection method between the cardboard 20 and the mesh support paper 30 is simple, which reduces the difficulty of connecting the cardboard 20 and the mesh support paper 30.

[0087] In some examples, adhesive or double-sided tape is applied to the cardboard 20, and then the cardboard 20 is bonded to the grid support paper 30 to form the cardboard part 10.

[0088] In some feasible ways, Figure 8 The structure of cardboard component 10 is shown schematically. See also... Figure 8 As shown, two or more grid support papers 30 are provided between two adjacent cardboard pieces 20. The two or more grid support papers 30 are stacked along the thickness direction X of the cardboard piece 20. Each grid support paper 30 between two adjacent cardboard pieces 20 is interconnected. Of the grid support papers 30, the two outermost grid support papers 30 are connected to the cardboard pieces 20 on both sides, respectively.

[0089] By setting two or more grid support papers 30 between two adjacent cardboard pieces 20, when the cardboard piece 20 is subjected to impact or compression, the force can be dispersed and buffered through multiple grid support papers 30, which is beneficial to improving the overall impact resistance of the cardboard piece 10.

[0090] In some examples, adjacent grid support sheets 30 can be connected along the thickness direction X of the cardboard 20 via their respective mesh knots 31. For example, adjacent grid support sheets 30 can be connected by adhesive bonding via their respective mesh knots 31.

[0091] The cardboard part 10 of this application embodiment can at least be used to replace existing corrugated cardboard. While meeting the required performance requirements, it has lower material costs and is more suitable for the trends of environmental protection and weight reduction.

[0092] This application also provides a packaging box, which includes the cardboard piece 10 described in the above embodiments. The cardboard piece 10 is folded and connected according to the size and style design of the packaging box to form a packaging box that meets product requirements.

[0093] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cardboard component for packaging boxes, characterized in that, The cardboard component includes: Cardboard and grid support paper; Along the thickness direction of the cardboard, cardboard is respectively disposed on both sides of the grid support paper. The elastic modulus of the cardboard is greater than that of the grid support paper. The grid support paper includes a mesh knot, a perforated hole, and a transition connection. The mesh knot includes a first connection and a second connection. One of the cardboards on both sides of the grid support paper is connected to the first connection and the other is connected to the second connection. The transition connection is disposed between any two adjacent mesh knots, and there is a gap between the transition connection and the cardboard.

2. The cardboard component according to claim 1, characterized in that, The grid support paper is made of paper material and is a one-piece molded three-dimensional structure.

3. The cardboard component according to claim 2, characterized in that, The grid support paper includes multiple paper strips, and each of the paper strips is connected to each other to form the grid knot, the hollow hole and the transition connection.

4. The cardboard component according to claim 3, characterized in that, The thickness of the cardboard is D1, and the thickness of the paper strip is D2, wherein D1 > D2.

5. The cardboard component according to claim 4, characterized in that, The thickness of the cardboard and the thickness of the paper strip satisfy the following relationship: 7D2≥D1≥5D2.

6. The cardboard component according to claim 2, characterized in that, The structure of the grid support paper is as follows: along the transverse direction of the paper, multiple rows of longitudinal grooves are provided on the paper, each row of longitudinal grooves includes multiple longitudinal grooves, and the longitudinal grooves of adjacent rows are staggered. Along the transverse direction of the paper, when the two ends of the paper are stretched, the longitudinal grooves are torn open, and the paper between two adjacent longitudinal grooves is twisted under the stretching action to form the grid support paper.

7. The cardboard component according to claim 1, characterized in that, There is an included angle V between the transition connection and the mesh knot, wherein 110°≤V≤160°.

8. The cardboard component according to claim 1, characterized in that, The angle between the axial direction of the perforated hole and the thickness direction of the cardboard is K, where 50°≤K≤85°.

9. The cardboard component according to any one of claims 1 to 8, characterized in that, The number of cardboard sheets is three or more, and the number of grid support sheets is two or more. Along the thickness direction of the cardboard sheets, the cardboard sheets and the grid support sheets are alternately arranged. And / or, Two or more grid support papers are disposed between two adjacent cardboards, and the two or more grid support papers are stacked together along the thickness direction of the cardboard.

10. The cardboard article according to any one of claims 1 to 8, characterized in that, The cardboard on both sides of the grid support paper is arranged parallel to each other. The thickness of the cardboard is D1, and the vertical distance between the cardboard on both sides of the grid support paper is D3, wherein D3 > D1.

11. The cardboard component according to claim 10, characterized in that, 6D1≥D3≥4D1.

12. The cardboard article according to any one of claims 1 to 8, characterized in that, One of the cardboard pieces on both sides of the grid support paper is bonded to the first connecting part, and the other is bonded to the second connecting part.

13. The cardboard article according to any one of claims 1 to 8, characterized in that, The grid support paper is kraft paper.

14. A packaging box, characterized in that, Includes the cardboard parts as described in any one of claims 1 to 13.

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