High-strength six-layer corrugated board

Abstract

The utility model discloses a high-strength six-layer corrugated board, which comprises outer surface paper, inner surface paper and a core paper layer, the core paper layer is connected between the outer surface paper and the inner surface paper, the core paper layer comprises three layers of corrugated core paper and a layer of straight core paper, and the ridge tips of the two layers of corrugated core paper are oppositely attached. According to the high-strength six-layer corrugated board, the corrugated tips of the two layers of corrugated core paper are oppositely attached, under the condition that the bearing capacity of the high-strength six-layer corrugated board is not weakened, straight core paper connected between the two adjacent layers of corrugated core paper is omitted, material cost is saved, corresponding processing energy consumption is reduced, and the high-strength six-layer corrugated board is lower in carbon and more environmentally friendly.

Description

Technical Field

[0001] The utility model relates to a corrugated paperboard, in particular to a high-strength six-layer corrugated paperboard. Background Art

[0002] Corrugated cardboard has the advantages of low cost, light weight, easy processing, high strength, excellent printing adaptability, convenient storage and transportation, etc. Moreover, most of the corrugated paper can be recycled. Corrugated paper can be used as packaging for food or digital products. It is relatively environmentally friendly and widely used.

[0003] Combination Figure 5 As shown, the current corrugated paperboard is mainly composed of one or more corrugated paper 82 (a layer of corrugated core paper is formed by laminating the corrugated tip with the flat core paper) and the surface paper 81. Therefore, the current corrugated paperboard mainly includes three-layer corrugated paperboard, five-layer corrugated paperboard, seven-layer corrugated paperboard 50, nine-layer corrugated paperboard, etc. The more layers, the stronger the bearing capacity and the better the anti-seismic and anti-impact capabilities. However, since the current corrugated paper with more than five layers uses more than two groups of corrugated paper to laminate in sequence to increase the thickness of the paperboard, the corrugated tips of the two adjacent layers of corrugated core paper are mostly misaligned and cannot form the best force. Therefore, it is necessary to use flat core paper for transition lamination between every two layers of corrugated core paper, which wastes paper and does not achieve a better effect in bearing capacity.

[0004] Chinese patent number ZL201810244777.0 disclosed a six-layer corrugated paperboard on March 23, 2018, including a first face paper, a second face paper, an inner paper, a core paper, a first corrugated paper and a second corrugated paper, the first face paper is arranged on the second face paper, the first face paper and the second face paper form a double-layer structure, the first corrugated paper is arranged between the second face paper and the core paper, and the second corrugated paper is arranged between the core paper and the inner paper. The six-layer corrugated paperboard with this structure is actually based on the five-layer corrugated paperboard, with one more layer of face paper pasted on it, so that the face paper is thickened, thereby improving the bursting strength. However, compared with the five-layer corrugated paperboard, its bearing capacity has not been significantly improved. In addition, the pasting of two layers of face paper consumes a large amount of paste and a correspondingly large amount of heat. Utility Model Content

[0005] The utility model aims to provide a high-strength six-layer corrugated paperboard with simple and reasonable structure, less consumables, low cost and strong load-bearing capacity.

[0006] The purpose of the utility model is achieved in this way:

[0007] A high-strength six-layer corrugated paperboard comprises outer paper, inner paper and a core paper layer, wherein the core paper layer is connected between the outer paper and the inner paper, and the core paper layer comprises three layers of corrugated core paper and one layer of flat core paper, wherein the flute tips of the two layers of corrugated core paper are relatively attached to each other.

[0008] The purpose of the utility model can also be solved by the following technical measures:

[0009] As a more specific solution, the three layers of corrugated core paper are respectively the first corrugated core paper, the second corrugated core paper and the third corrugated core paper, the opposite flute tips of the first corrugated core paper and the second corrugated core paper are bonded to each other, and the straight core paper is bonded between the second corrugated core paper and the third corrugated core paper. The outer paper and the inner paper are respectively bonded to the outer sides of the first corrugated core paper and the third corrugated core paper. Alternatively, the three layers of corrugated core paper are respectively the first corrugated core paper, the second corrugated core paper and the third corrugated core paper, the straight core paper is bonded to the first corrugated core paper and the second corrugated core paper; the opposite flute tips of the second corrugated core paper and the third corrugated core paper are bonded to each other; the outer paper and the inner paper are respectively bonded to the outer sides of the first corrugated core paper and the third corrugated core paper.

[0010] As a further solution, the flute heights of the first corrugated core paper, the second corrugated core paper and the third corrugated core paper are the same.

[0011] As a further solution, the first corrugated core paper and the second corrugated core paper have the same flute height; the third corrugated core paper has a flute height less than the first corrugated core paper. The flute height of the corrugated core paper is mainly set in combination with the application requirements.

[0012] As a further solution, the outer surface paper, the inner surface paper and the flat core paper have the same thickness.

[0013] As a further solution, the thickness of the flat core paper is less than or greater than the thickness of the outer paper or the inner paper. Since the high-strength six-layer corrugated paperboard is mainly used in heavy-duty loading occasions, the thickness of the outer paper or the inner paper can be appropriately increased compared with the thickness of the flat core paper to reduce the risk of scratching the surface.

[0014] As a further solution, the flute height of the corrugated core paper is 2.8-5.5mm. There are generally five types of corrugated paper used in cartons: A flute, C flute, B flute, E flute, and F flute. The heights are arranged in descending order: A, C, B, E, and F. Each flute height has an industry standard.

[0015] The fluting direction of the corrugated core paper is directed along the width direction of the six-layer corrugated paperboard.

[0016] The beneficial effects of the utility model are as follows:

[0017] (1) In this high-strength six-layer corrugated paperboard, the tips of two layers of corrugated core paper are relatively close to each other. Without weakening its bearing capacity, it eliminates the need for a straight core paper connecting two adjacent layers of corrugated core paper, saving material costs and reducing the corresponding processing energy consumption, making it more low-carbon and environmentally friendly.

[0018] (2) Compared with the traditional seven-layer corrugated cardboard, the six-layer corrugated cardboard of this high-strength six-layer corrugated cardboard also has three layers of corrugated core paper, and the flute tips of the two layers of corrugated core paper are directly fitted to each other, eliminating the straight core paper in the middle of the transition, and the supporting strength is stronger, so it completely replaces the application of the traditional seven-layer corrugated cardboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic cross-sectional structure diagram of the first embodiment of the six-layer corrugated paperboard in the utility model.

[0020] Figure 2 It is a schematic cross-sectional structure diagram of the second embodiment of the six-layer corrugated paperboard in the utility model.

[0021] Figure 3 It is a schematic cross-sectional structure diagram of the third embodiment of the six-layer corrugated paperboard in the utility model.

[0022] Figure 4 It is a schematic cross-sectional structure diagram of the fourth embodiment of the six-layer corrugated paperboard in the utility model.

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of a traditional seven-layer corrugated cardboard. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Example 1, see Figure 1 As shown, a high-strength six-layer corrugated paperboard includes an outer paper 1, an inner paper 6 and a core paper layer, wherein the core paper layer is connected between the outer paper 1 and the inner paper 6, and the core paper layer includes three layers of corrugated core paper and at least one layer of flat core paper, wherein the flute tips of the two layers of corrugated core paper are relatively attached to each other (see Figure 1 (as shown in A in the figure).

[0026] The core paper layer includes three layers of corrugated core paper and one layer of flat core paper. The three layers of corrugated core paper are respectively a first corrugated core paper 2, a second corrugated core paper 3 and a third corrugated core paper 5. The opposite flute tips of the first corrugated core paper 2 and the second corrugated core paper 3 are bonded to each other, and the flat core paper is bonded between the second corrugated core paper 3 and the third corrugated core paper 5. The outer paper 1 and the inner paper 6 are respectively bonded to the outer sides of the first corrugated core paper 2 and the third corrugated core paper 5 to form a six-layer corrugated paperboard 10.

[0027] The flute height h0 of the first corrugated core paper 2, the second corrugated core paper 3 and the third corrugated core paper 5 is the same.

[0028] The outer paper 1, the inner paper 6 and the flat core paper have the same thickness.

[0029] The fluting direction of the corrugated core paper is directed along the width direction of the six-layer corrugated paperboard.

[0030] Embodiment 2 is different from Embodiment 1 in that, see Figure 2 As shown, the flute height h0 of the first corrugated core paper 2 and the second corrugated core paper 3 is the same; the flute height h1 of the third corrugated core paper 5 is smaller than the flute height h0 of the first corrugated core paper 2 .

[0031] Embodiment 3 is different from Embodiment 1 in that: Figure 3 As shown, the thickness H2 of the flat core paper is smaller than the thickness H1 of the outer paper 1 or the inner paper 6 .

[0032] The fourth embodiment is different from the first embodiment in that: Figure 4 As shown, the three layers of corrugated core paper are respectively the first corrugated core paper 2, the second corrugated core paper 3 and the third corrugated core paper 5, the straight core paper 4 is attached between the first corrugated core paper 2 and the second corrugated core paper 3; the opposite flute tips of the second corrugated core paper 3 and the third corrugated core paper 5 are attached to each other; the outer paper 1 and the inner paper 6 are attached to the outer sides of the first corrugated core paper 2 and the third corrugated core paper 5 respectively. This embodiment is similar to the inverted state of the first embodiment.

[0033] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-strength six-layer corrugated paperboard, comprising an outer paper (1), an inner paper (6) and a core paper layer, wherein the core paper layer is connected between the outer paper (1) and the inner paper (6), characterized in that: The core paper layer comprises three layers of corrugated core paper and one layer of flat core paper (4), wherein the flute tips of the two layers of corrugated core paper are relatively attached to each other.

2. The high-strength six-layer corrugated paperboard according to claim 1, characterized in that: The three layers of corrugated core paper are respectively a first corrugated core paper (2), a second corrugated core paper (3) and a third corrugated core paper (5); the opposite flute tips of the first corrugated core paper (2) and the second corrugated core paper (3) are bonded to each other; the straight core paper (4) is bonded between the second corrugated core paper (3) and the third corrugated core paper (5); the outer surface paper (1) and the inner surface paper (6) are respectively bonded to the outer sides of the first corrugated core paper (2) and the third corrugated core paper (5).

3. The high-strength six-layer corrugated paperboard according to claim 1, characterized in that: The three layers of corrugated core paper are respectively a first corrugated core paper (2), a second corrugated core paper (3) and a third corrugated core paper (5); the straight core paper (4) is laminated between the first corrugated core paper (2) and the second corrugated core paper (3); the opposite flute tips of the second corrugated core paper (3) and the third corrugated core paper (5) are laminated to each other; the outer surface paper (1) and the inner surface paper (6) are laminated to the outer sides of the first corrugated core paper (2) and the third corrugated core paper (5) respectively.

4. The high-strength six-layer corrugated paperboard according to claim 2, characterized in that: The first corrugated core paper (2), the second corrugated core paper (3) and the third corrugated core paper (5) have the same flute height.

5. The high-strength six-layer corrugated paperboard according to claim 2, characterized in that: The first corrugated core paper (2) and the second corrugated core paper (3) have the same flute height; the third corrugated core paper (5) has a flute height that is smaller than the flute height of the first corrugated core paper (2).

6. The high-strength six-layer corrugated paperboard according to claim 1, characterized in that: The outer paper (1), the inner paper (6) and the flat core paper (4) have the same thickness.

7. The high-strength six-layer corrugated paperboard according to claim 1, characterized in that: The thickness of the flat core paper (4) is less than or greater than the thickness of the outer paper (1) or the inner paper (6).

8. The high-strength six-layer corrugated paperboard according to claim 1, characterized in that: The flute height of the corrugated core paper is 2.8-5.5 mm.

9. The high-strength six-layer corrugated paperboard according to claim 1, characterized in that: The fluting direction of the corrugated core paper is directed along the width direction of the six-layer corrugated paperboard.

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