High-strength corrugated board

Abstract

The utility model discloses a high -strength corrugated paperboard, including first face paper, the core paper subassembly of glue adhesion in first face paper top and the second face paper of glue adhesion in top, and core paper subassembly includes with first face paper adhesion fixed first core paper layer, with first core paper layer stacking second core paper layer, the lower surface of second core paper layer with first core paper layer adhesion fixed, the upper surface of second core paper layer with second face paper adhesion fixed, first core paper layer is through folding and is in turn staggered distribution first big trapezoidal groove and first small trapezoidal groove, and second core paper layer is through folding and is in turn staggered distribution second small trapezoidal groove and second big trapezoidal groove, this corrugated paperboard can effectively avoid deformation and breakage when improving its compressive strength, impact resistance, durability and stability, and is especially suitable for the packaging demand of needing high strength, stability.

Description

Technical Field

[0001] This utility model relates to a high-strength corrugated cardboard. Background Technology

[0002] Corrugated cardboard, also known as corrugated paperboard, is made of at least one layer of corrugated paper and one layer of linerboard bonded together. It has good elasticity and extensibility. It is mainly used to manufacture cartons, carton fillings, and other packaging materials for fragile goods.

[0003] Therefore, corrugated cardboard boxes are a common type of transport packaging. The corrugated cardboard used to make these boxes mainly consists of corrugated paper, facing paper, and liner paper. The corrugated paper is typically arranged in two or three layers, separated by core paper, and then glued together to form what is commonly referred to as a 5-layer or 7-layer board. Existing simple corrugated cardboard structures have the following problems: when using corrugated cardboard boxes to pack heavy objects, or when the boxes have hand holes and are frequently dragged, the corrugated paper at stress points is easily torn due to poor structural stability; furthermore, under poor loading / unloading conditions and storage environments, the corrugated paper is easily crushed, leading to a decrease in the box's strength, and it may even become unusable for loading goods. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a high-strength corrugated cardboard.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A high-strength corrugated cardboard includes a first face paper, a core paper assembly glued to the top of the first face paper with adhesive, and a second face paper glued to the top of the first face paper with adhesive. The core paper assembly includes a first core paper layer glued and fixed to the first face paper, and a second core paper layer stacked on top of the first core paper layer. The lower surface of the second core paper layer is glued and fixed to the first core paper layer, and the upper surface of the second core paper layer is glued and fixed to the second face paper. The first core paper layer is folded and has a first large trapezoidal groove and a first small trapezoidal groove distributed in a staggered manner. The second core paper layer is folded and has a second small trapezoidal groove and a second large trapezoidal groove distributed in a staggered manner.

[0007] Preferably, the second small trapezoidal groove is embedded inside the first large trapezoidal groove, and the bottom outer surface of the second small trapezoidal groove is abutted and bonded to the bottom of the first large trapezoidal groove; the first small trapezoidal groove is embedded inside the second large trapezoidal groove, and the bottom outer surface of the first small trapezoidal groove is abutted and bonded to the top of the second large trapezoidal groove.

[0008] Furthermore, after the second small trapezoidal groove, the first large trapezoidal groove, the first small trapezoidal groove, and the second large trapezoidal groove are sequentially abutted and bonded together, a buffer cavity is also formed.

[0009] Furthermore, the buffer cavity is a rhomboid cavity.

[0010] Preferably, the upper surface of the first paper has first trapezoidal limiting grooves at equal intervals.

[0011] Preferably, the lower surface of the second paper is provided with second trapezoidal limiting grooves at equal intervals.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. By designing staggered first large trapezoidal groove, first small trapezoidal groove, second small trapezoidal groove and second large trapezoidal groove in the core paper assembly, the overall structural strength of the paperboard is enhanced. These staggered trapezoidal grooves can effectively improve the compressive strength and impact resistance of the paperboard, making the corrugated paperboard more stable when subjected to external forces. The precise alignment and nesting design of the first large trapezoidal groove and the first small trapezoidal groove of the first core paper layer with the second small trapezoidal groove and the second large trapezoidal groove of the second core paper layer can increase the tightness of the structure, thereby enhancing the overall rigidity of the paperboard and avoiding deformation and damage.

[0014] 2. By forming a diamond-shaped buffer cavity, the corrugated cardboard can absorb some energy when subjected to external impact, effectively reducing the impact of external forces on the cardboard. The presence of the buffer cavity improves the shock resistance of the cardboard, especially reducing damage caused by vibration or compression during transportation. Moreover, the first trapezoidal limiting groove of the first face paper and the second trapezoidal limiting groove of the second face paper can effectively limit the misalignment and deformation of the first core paper layer and the second core paper layer, ensuring that the cardboard maintains a stable structural shape during production and use, and reducing deformation problems caused by uneven stress.

[0015] 3. The first and second core paper layers in the core core paper assembly work together, and the first large trapezoidal groove and the first small trapezoidal groove of the first core paper layer are precisely aligned and nested with the second small trapezoidal groove and the second large trapezoidal groove of the second core paper layer. This design can effectively disperse external forces and improve the durability of corrugated cardboard. It can not only provide stronger support, but also improve its mechanical properties such as compression resistance, tensile strength, and bending resistance. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a high-strength corrugated cardboard according to the present invention;

[0017] Figure 2 for Figure 1 The exploded diagram. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0019] Example

[0020] A type of high-strength corrugated cardboard, such as Figure 1-2 As shown, the assembly includes a first face paper 1, a core paper assembly 2 glued to the top of the first face paper 1, and a second face paper 3 glued to the top. The core paper assembly 2 includes a first core paper layer 21 glued to the first face paper 1, and a second core paper layer 22 stacked on top of the first core paper layer 21. The lower surface of the second core paper layer 22 is glued to the first core paper layer 21, and the upper surface of the second core paper layer 22 is glued to the second face paper 3. The first core paper layer 21 is folded and staggered to distribute a first large trapezoidal groove 211 and a first small trapezoidal groove 212. The second core paper layer 22 is folded and staggered to distribute a second small trapezoidal groove 221 and a second large trapezoidal groove 222.

[0021] The second small trapezoidal groove 221 is embedded inside the first large trapezoidal groove 211, and the bottom outer surface of the second small trapezoidal groove 221 is abutted and bonded to the bottom of the first large trapezoidal groove 211. The first small trapezoidal groove 212 is embedded inside the second large trapezoidal groove 222, and the bottom outer surface of the first small trapezoidal groove 212 is abutted and bonded to the top of the second large trapezoidal groove 222.

[0022] After the second small trapezoidal groove 221, the first large trapezoidal groove 211, the first small trapezoidal groove 212, and the second large trapezoidal groove 222 are sequentially abutted and bonded together, a buffer cavity 23 is formed.

[0023] It should be further explained that the first large trapezoidal groove 211 and the first small trapezoidal groove 212 of the first core paper layer 21 are precisely aligned and nested with the second small trapezoidal groove 221 and the second large trapezoidal groove 222 of the second core paper layer 22. The inclined structure of the trapezoidal groove can generate a lateral component force when compressed, forcing the first core paper layer 21 and the second core paper layer 22 to squeeze and lock each other, forming a rigid support network similar to a "mortise and tenon structure". Compared with single-core corrugated cardboard, the vertical compressive strength is improved and the bending stiffness is significantly enhanced.

[0024] In this embodiment, the buffer cavity 23 is a rhomboid cavity.

[0025] It should be further explained that the symmetrical inclined side structure of the rhomboid cavity, namely the inclined surface of the second small trapezoidal groove 221 joining the first large trapezoidal groove 211 and the first small trapezoidal groove 212 joining the second large trapezoidal groove 222, transforms the vertical pressure into bidirectional diagonal extrusion force, avoiding stress concentration. When under pressure, the short diagonal of the rhombus is compressed, and the inclined side deforms rapidly to absorb the initial impact. In addition, the long diagonal extends to resist large deformation and provide high-strength support.

[0026] The upper surface of the first sheet 1 is provided with first trapezoidal limiting grooves 11 at equal intervals. Specifically, the first large trapezoidal groove 211 can be embedded in the first trapezoidal limiting groove 11 and then bonded and fixed to the first sheet 1, which can effectively prevent the first large trapezoidal groove 211 from deforming.

[0027] The lower surface of the second paper 3 is provided with second trapezoidal limiting grooves 21 at equal intervals. Specifically, the second trapezoidal limiting grooves 21 can be inserted into the second paper 3 and then bonded and fixed, which can effectively prevent the second trapezoidal limiting grooves 21 from deforming.

[0028] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A high-strength corrugated cardboard, comprising a first face paper, a core paper assembly glued to the first face paper, and a second face paper glued to the top, characterized in that, The core paper assembly includes a first core paper layer bonded and fixed to a first face paper, a second core paper layer stacked on top of the first core paper layer, the lower surface of the second core paper layer bonded and fixed to the first core paper layer, the upper surface of the second core paper layer bonded and fixed to the second face paper, the first core paper layer being folded and staggered to distribute a first large trapezoidal groove and a first small trapezoidal groove, and the second core paper layer being folded and staggered to distribute a second small trapezoidal groove and a second large trapezoidal groove.

2. The high-strength corrugated paperboard according to claim 1, characterized in that, The second small trapezoidal groove is embedded inside the first large trapezoidal groove, and the bottom outer surface of the second small trapezoidal groove is abutted and bonded to the bottom of the first large trapezoidal groove. The first small trapezoidal groove is embedded inside the second large trapezoidal groove, and the bottom outer surface of the first small trapezoidal groove is abutted and bonded to the top of the second large trapezoidal groove.

3. The high-strength corrugated paperboard according to claim 2, characterized in that, After the second small trapezoidal groove, the first large trapezoidal groove, the first small trapezoidal groove, and the second large trapezoidal groove are sequentially abutted and bonded together, a buffer cavity is formed.

4. The high-strength corrugated paperboard according to claim 3, characterized in that, The buffer cavity is a rhomboid cavity.

5. The high-strength corrugated paperboard of claim 1, wherein, The upper surface of the first sheet is provided with first trapezoidal limiting grooves at equal intervals.

6. The high-strength corrugated paperboard of claim 1, wherein, The lower surface of the second paper is provided with second trapezoidal limiting grooves at equal intervals.

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