Double-layer corrugated board with crossed lines

Abstract

The utility model discloses a double-layer corrugated board with crossed lines, which belongs to the technical field of corrugated boards and comprises a paper core formed by stacking a plurality of layers of corrugated paper, middle partition paper arranged between adjacent corrugated paper and adhered with the adjacent corrugated paper through glue, and two pieces of surface paper respectively adhered on the upper end face and the lower end face of the paper core, the corrugated paper is divided into straight corrugated paper and inclined corrugated paper, and the straight corrugated paper and the inclined corrugated paper are alternately stacked when forming the paper core. The corrugated board is technically characterized in that the paper core in the corrugated board is formed by alternately stacking the straight corrugated paper and the inclined corrugated paper, so that the formed paper core has high bending resistance and tensile resistance in multiple directions, the complex stress requirement can be met, and particularly, when two or more pieces of inclined corrugated paper are contained in the paper core, the paper core is not prone to deformation, and the paper core is not prone to deformation. The inclined edges of the adjacent inclined edge paper face the mutually crossed arrangement direction, so that the paperboard has good stress performance in all directions.

Description

Technical Field

[0001] This utility model relates to the field of corrugated cardboard technology, specifically a double-layer corrugated cardboard with cross-patterned texture. Background Technology

[0002] Corrugated paper is a type of paperboard made by bonding two layers of linerboard to a corrugated core. It is lightweight, strong, has good cushioning properties, is easy to cut and print, is inexpensive, and is environmentally friendly and recyclable. It is widely used in packaging, construction, furniture manufacturing, and artistic creation.

[0003] Utility model patent application CN207496172U discloses a corrugated cardboard, comprising: an outer paper layer including a face paper and a waterproof membrane disposed on the inner side of the face paper; a corrugated moisture-proof core layer; and an inner paper layer including a base paper, a moisture-absorbing membrane disposed on the inner side of the base paper, and a mesh fiber coating disposed on the side of the moisture-absorbing membrane opposite to the base paper. This design enhances the physical strength of the corrugated cardboard, extends its service life in humid or other harsh environments, and does not require increasing the cardboard's weight or number of layers, thus avoiding increased manufacturing costs and processing difficulty. It also helps reduce the overall weight of the corrugated cardboard, facilitating handling and transportation during use.

[0004] The aforementioned cardboard is similar to ordinary cardboard on the market, with its internal multi-layer corrugated paper sheets arranged in the same direction. Although it has high bending and tensile strength in one direction, its bending and tensile strength in the other direction is weak. When using it, the arrangement direction of the cardboard needs to be considered, which is inconvenient. Moreover, it may be damaged due to improper force during use, resulting in the failure of its packaging function. Therefore, in order to address the above problems, a double-layer corrugated cardboard with cross-patterned texture is proposed. Utility Model Content

[0005] The technical problem this utility model aims to solve is to provide a double-layer corrugated cardboard with cross-grain patterns. The core of this corrugated cardboard is composed of alternating layers of straight and diagonal corrugated sheets, which are bonded together by spacers, resulting in high integrity. The straight corrugated sheets have 90-degree straight corrugations, while the diagonal corrugated sheets have 45-degree diagonal corrugations. When the straight and diagonal corrugated sheets are stacked, their orientations intersect, giving the core strong bending and tensile strength in multiple directions and meeting complex stress requirements. In particular, when the core contains two or more diagonal corrugated sheets, the adjacent diagonal corrugated sheets are arranged with their orientations intersecting. This arrangement further improves the strength of the corrugated cardboard under stress in all directions, giving it good stress performance in all directions. This solves the technical problem in comparative technologies where multiple layers of corrugated sheets are arranged in the same direction, resulting in extremely weak bending and tensile strength in a certain direction and making it difficult to meet complex stress requirements.

[0006] The technical solution adopted by the embodiments of this application to solve its technical problem is:

[0007] A double-layer corrugated cardboard with cross-grain pattern includes a core composed of several layers of corrugated paper stacked together, a spacer paper disposed between adjacent corrugated paper and bonded to the adjacent corrugated paper with adhesive, and two face sheets respectively bonded to the upper and lower ends of the core. The corrugated paper is divided into straight corrugated paper and diagonal corrugated paper, and the two are alternately stacked when forming the core. The core of this corrugated cardboard is composed of alternating layers of straight and diagonal corrugated paper, which enables the core to have strong bending and tensile strength in multiple directions and can meet more complex stress requirements.

[0008] In one possible implementation, the corrugated paper is formed from a single sheet of core paper with a sinusoidal cross-section, and is bent to form alternating top and bottom corrugations. This structural form can constitute a corrugated structure to provide support and compressive strength.

[0009] In one possible implementation, the top and bottom sloping ribs are parallel to each other, and the angle between the two and the edge of the middle partition paper is 45 degrees. This angle makes the angle between the sloping ribs and the long and short sides of the cardboard consistent, thereby making the stress on the cardboard more uniform in all directions.

[0010] In one possible implementation, when the paper core contains two or more diagonal corrugated sheets, the diagonal orientations of adjacent diagonal corrugated sheets intersect each other. This arrangement can further improve the strength of the corrugated cardboard under stress in all directions, so that the cardboard has good stress performance in all directions.

[0011] In one possible implementation, the straight corrugated paper is formed from a single sheet of core paper with a sinusoidal cross-section, and is bent to form alternating top and bottom straight corrugations. This structural form can constitute a corrugated structure to provide support and compressive strength.

[0012] In one possible implementation, the divider paper is divided into ordinary divider paper and anti-counterfeiting divider paper. The anti-counterfeiting divider paper has an anti-counterfeiting label formed by spraying invisible ultraviolet luminescent ink. When exposed to ultraviolet light, the anti-counterfeiting label can display the printed anti-counterfeiting content, thereby improving the image of the cardboard brand.

[0013] In one possible implementation, the face paper includes a base paper, the side of which away from the paper core is covered with a waterproof layer. In the above structure, the waterproof layer can improve the waterproofness of the face paper, thereby preventing moisture from entering the paper core through the face paper, causing the paper core to soften and the corrugated cardboard to lose its supporting function.

[0014] In summary, this utility model has the following beneficial technical effects:

[0015] The core of this corrugated cardboard is composed of alternating layers of straight and diagonal corrugated paper, which are bonded together by spacers, resulting in high integrity. The straight corrugated paper has 90-degree straight corrugations, while the diagonal corrugated paper has 45-degree diagonal corrugations. When the straight and diagonal corrugated paper are stacked, their corrugations cross each other, which enables the core to have strong bending and tensile strength in multiple directions, meeting complex stress requirements.

[0016] In particular, when the paper core contains two or more diagonal corrugated sheets, the adjacent diagonal corrugated sheets are arranged in a way that the diagonal directions intersect each other. This arrangement can further improve the strength of the corrugated cardboard under stress in all directions, so that the cardboard has good stress performance in all directions. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structural configuration of this utility model;

[0020] Figure 3 This is a schematic diagram of the oblique corrugated paper structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the straight corrugated paper structure of this utility model;

[0022] Figure 5 This is a structural diagram of the three-layer paper core of this utility model;

[0023] Figure 6 This is a schematic diagram of the partition paper structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the face paper structure of this utility model.

[0025] In the diagram: 1. Corrugated paper; 11. Straight corrugated paper; 111. Top straight corrugated paper; 112. Bottom straight corrugated paper; 12. Slanted corrugated paper; 121. Top slanted corrugated paper; 122. Bottom slanted corrugated paper; 2. Divider paper; 21. Anti-counterfeiting label; 3. Face paper; 31. Base paper; 32. Waterproof laminate. Detailed Implementation

[0026] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0027] like Figure 1 - Figure 2 As shown, this embodiment provides a cross-patterned double-layer corrugated cardboard, including a core composed of several layers of corrugated paper 1 stacked together, a spacer 2 disposed between adjacent corrugated paper 1 and bonded to the adjacent corrugated paper 1 with adhesive, and two face sheets 3 respectively bonded to the upper and lower ends of the core. The corrugated paper 1 is divided into straight corrugated paper 11 and oblique corrugated paper 12, and the two are stacked alternately when forming the core. The core of this corrugated cardboard is composed of alternating stacks of straight corrugated paper 11 and oblique corrugated paper 12, which enables the core to have strong bending and tensile strength in multiple directions and can meet more complex stress requirements.

[0028] like Figure 3 - Figure 4 As shown, the oblique corrugated paper 12 is formed from a single core paper, with a sinusoidal cross-section. It is bent to form alternating top oblique ribs 121 and bottom oblique ribs 122. The straight corrugated paper 11 is formed from a single core paper, with a sinusoidal cross-section. It is bent to form alternating top straight ribs 111 and bottom straight ribs 112. The above structural forms can constitute a corrugated structure to provide support and compressive strength. The top oblique ribs 121 and bottom oblique ribs 122 are parallel to each other, and the angle between the two and the edge of the middle partition paper 2 is 45 degrees. This angle makes the angle between the oblique ribs and the long and short sides of the paperboard consistent, thereby making the stress on the paperboard more uniform in all directions.

[0029] Based on the above scheme, the paper core can be constructed in various forms to meet different combination requirements. In particular, when the paper core contains two or more diagonal corrugated sheets 12, the diagonal directions of adjacent diagonal corrugated sheets 12 intersect each other. This arrangement can further improve the strength of the corrugated cardboard under stress in all directions, giving the cardboard good stress performance in all directions, such as... Figure 5 As shown.

[0030] like Figure 7 As shown, the partition paper 2 is divided into ordinary partition paper and anti-counterfeiting partition paper. The anti-counterfeiting partition paper has an anti-counterfeiting label 21 formed by spraying invisible ultraviolet luminescent ink. When irradiated with ultraviolet light, the anti-counterfeiting label 21 can display the printed anti-counterfeiting content, thereby improving the image of the cardboard brand.

[0031] like Figure 6 As shown, the face paper 3 includes a base paper 31, and a waterproof layer 32 is attached to the side away from the paper core. In the above structure, the waterproof layer 32 can improve the waterproofness of the face paper 3, thereby preventing moisture from entering the paper core through the face paper 3, causing the paper core to soften and the corrugated cardboard to lose its supporting function.

[0032] The working principle and usage process of this utility model:

[0033] The corrugated cardboard core is composed of alternating layers of straight corrugated paper 11 and diagonal corrugated paper 12, which are bonded together by spacers 2, resulting in high integrity. The straight corrugated paper 11 has 90-degree straight corrugations, while the diagonal corrugated paper 12 has 45-degree diagonal corrugations. When the straight corrugated paper 11 and diagonal corrugated paper 12 are stacked, their corrugations intersect, giving the core strong bending and tensile strength in multiple directions and meeting complex stress requirements. In particular, when the core contains two or more diagonal corrugated paper 12, the adjacent diagonal corrugated paper 12 are arranged with their corrugations intersecting. This arrangement further improves the strength of the corrugated cardboard under stress in all directions, giving the cardboard good stress performance in all directions.

[0034] In addition, the partition paper 2 is divided into ordinary partition paper and anti-counterfeiting partition paper. The anti-counterfeiting partition paper has an anti-counterfeiting label 21 formed by spraying invisible ultraviolet luminescent ink. When irradiated with ultraviolet light, the anti-counterfeiting label 21 can display the printed anti-counterfeiting content, thereby improving the image of the cardboard brand.

[0035] Meanwhile, the face paper 3 includes a base paper 31, on the side away from the paper core, a waterproof layer 32 is attached. The waterproof layer 32 can improve the waterproofness of the face paper 3, thereby preventing moisture from entering the paper core through the face paper 3, causing the paper core to soften and the corrugated cardboard to lose its supporting function.

[0036] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A double-layer corrugated cardboard with cross-grain patterns, characterized in that, include: The paper core is composed of several layers of corrugated paper (1) stacked together; The partition paper (2) is placed between adjacent corrugated paper (1) and is bonded to the adjacent corrugated paper (1) by glue. The paper (3) consists of two sheets, which are respectively glued to the upper and lower ends of the paper core; The corrugated paper (1) is divided into straight corrugated paper (11) and oblique corrugated paper (12), and the two are stacked alternately when forming the paper core.

2. The double-layer corrugated cardboard with cross-grain pattern according to claim 1, characterized in that: The oblique corrugated paper (12) is formed from a core paper with a sinusoidal cross-section and is bent to form alternating top oblique corrugations (121) and bottom oblique corrugations (122).

3. The double-layer corrugated cardboard with cross-grain pattern according to claim 2, characterized in that: The top oblique rib (121) and the bottom oblique rib (122) are parallel to each other, and the angle between the two and the edge of the middle partition paper (2) is 45 degrees.

4. The double-layer corrugated cardboard with cross-grain pattern according to claim 2, characterized in that: When the paper core contains two or more diagonal corrugated sheets (12), the diagonal corrugations of adjacent diagonal corrugated sheets (12) intersect each other.

5. The double-layer corrugated cardboard with cross-grain pattern according to claim 1, characterized in that: The straight corrugated paper (11) is formed from a single core paper, and its cross-section is sinusoidal. It is bent to form alternating top straight corrugations (111) and bottom straight corrugations (112).

6. The double-layer corrugated cardboard with cross-grain pattern according to claim 1, characterized in that: The partition paper (2) is divided into ordinary partition paper and anti-counterfeiting partition paper. The anti-counterfeiting partition paper has an anti-counterfeiting label (21) formed by spraying invisible ultraviolet luminescent ink.

7. The double-layer corrugated cardboard with cross-grain pattern according to claim 1, characterized in that: The face paper (3) includes a base paper (31), on the side away from the paper core, a waterproof adhesive layer (32) is attached.

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