Waterproof composite paperboard

Abstract

The utility model provides a waterproof type composite paperboard which comprises a surface paper layer, a first corrugated paper layer, a second corrugated paper layer and a bottom paper layer which are distributed from top to bottom, the surface paper layer is bonded with the first corrugated paper layer through a first bonding layer, the first corrugated paper layer is bonded with the second corrugated paper layer through a second bonding layer, and the bottom paper layer is bonded with the second corrugated paper layer through a second bonding layer. The first corrugated paper layer and the second corrugated paper layer are bonded through a first bonding layer, the second corrugated paper layer and the bottom paper layer are bonded through a third bonding layer, waterproof layers are arranged on the outer surface of the surface paper layer and the outer surface of the bottom paper layer, the outer edge of the surface paper layer is bent downwards to form a side wrapping part, and the inner side face of the side wrapping part is bonded with the outer edge of the first corrugated paper layer, the outer edge of the second corrugated paper layer and the outer edge of the bottom paper layer. After the outer edge of the surface paper layer is bent, the surface paper layer is bonded with the side surfaces of the first corrugated paper layer, the second corrugated paper layer and the bottom paper layer on the side surfaces, so that the surface paper layer covers the side surface structures of the first corrugated paper layer and the second corrugated paper layer, water is prevented from entering from the side surfaces by utilizing the surface paper layer, and the pain point that water enters the side surfaces of the corrugated board is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to paperboard field especially relates to a waterproof composite paperboard. BACKGROUND

[0002] Corrugated paperboard is a common packaging paper type, which can absorb impact force and has good buffering capacity, low material density, light overall weight, and is suitable for some low-cost packaging and transportation use. In order to improve the waterproof performance of the corrugated paperboard on the market at the present stage, waterproof treatment is carried out on the surface layer and the bottom layer of the corrugated paper, so that the corrugated paperboard has good waterproof property. However, it is found in actual use that due to the structural characteristics of the corrugated paperboard, water is easily introduced into the side surface of the corrugated paperboard, causing the corrugated paperboard to be scrapped and difficult to recycle.

[0003] Therefore, it is necessary to make further improvement. SUMMARY

[0004] The utility model discloses a waterproof composite paperboard, which solves the problem of water entering the side surface of the corrugated paperboard.

[0005] To achieve the above object, the utility model provides a waterproof composite paperboard, which comprises a surface paper layer, a first corrugated paper layer, a second corrugated paper layer and a bottom paper layer distributed from top to bottom, the surface paper layer is adhered to the first corrugated paper layer through a first adhesive layer, the first corrugated paper layer is adhered to the second corrugated paper layer through a second adhesive layer, the second corrugated paper layer is adhered to the bottom paper layer through a third adhesive layer, the outer surface of the surface paper layer and the outer surface of the bottom paper layer are provided with a waterproof layer, the outer edge of the surface paper layer is bent downward to form a side wrapping part, and the inner side surface of the side wrapping part is adhered to the outer edge of the first corrugated paper layer, the outer edge of the second corrugated paper layer and the outer edge of the bottom paper layer.

[0006] In one or more embodiments, the waterproof layer is one of a waterproof film layer, a wax coating layer and a nano coating layer.

[0007] In one or more embodiments, the bottom end of the side wrapping part is flush with the lower end surface of the bottom paper layer.

[0008] In one or more embodiments, the corrugations of the first corrugated paper layer and the second corrugated paper layer are both "U" shaped, and the height of the first corrugated paper layer and the second corrugated paper layer is 3.0mm-4.2mm.

[0009] In one or more embodiments, the corrugation valleys of the first corrugated paper layer correspond to the corrugation peaks of the second corrugated paper layer.

[0010] In one or more embodiments, the surface paper layer and the bottom paper layer are both kraft paper, and the thickness of the surface paper layer and the bottom paper layer is 0.3mm-0.6mm.

[0011] Compared with the background art, the effect of the present application is that: the outer edge of the surface paper layer is bent and then bonded with the side of the first corrugated paper layer, the second corrugated paper layer and the side of the bottom paper layer, so that the side structure of the first corrugated paper layer and the second corrugated paper layer is covered by the surface paper layer, and water is prevented from entering from the side by the surface paper layer, thus solving the problem of water entering from the side of the corrugated paperboard. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The present application is a structure diagram of the composite paperboard. DETAILED DESCRIPTION

[0013] In order to deepen the understanding of the present application, the present application will be further described in combination with the embodiments and the drawings, and the embodiments are only used to explain the present application and do not constitute a limitation on the protection scope of the present application.

[0014] Referring to the drawings Figure 1 The present application provides a waterproof composite paperboard, which comprises a surface paper layer 1, a first corrugated paper layer 2, a second corrugated paper layer 3 and a bottom paper layer 4 distributed from top to bottom, the surface paper layer 1 is bonded with the first corrugated paper layer 2 through a first bonding layer 5, the first corrugated paper layer 2 is bonded with the second corrugated paper layer 3 through a second bonding layer 6, the second corrugated paper layer 3 is bonded with the bottom paper layer 4 through a third bonding layer 7, the outer surface of the surface paper layer 1 and the outer surface of the bottom paper layer 4 are provided with a waterproof layer 8, which can be one of a waterproof film, a wax coating and a nano coating, and the specific selection is based on actual needs, which is not limited here. The outer edge of the surface paper layer 1 is bent downward to form a side wrapping part 101, the inner side of the side wrapping part 101 is bonded with the outer edge of the first corrugated paper layer 2, the outer edge of the second corrugated paper layer 3 and the outer edge of the bottom paper layer 4, the side of the first corrugated paper layer, the second corrugated paper layer and the bottom paper layer is sealed by the side wrapping part 101, and water is prevented from entering from the side of the first corrugated paper layer and the second corrugated paper layer, so as to improve the waterproof performance of the corrugated paperboard in all directions.

[0015] The bottom end of the side wrapping part 101 is flush with the lower end surface of the bottom paper layer 4, avoiding the bottom end of the side wrapping part protruding from the bottom paper layer and affecting the appearance of the paperboard.

[0016] The corrugated shape of the first corrugated paper layer 2 and the second corrugated paper layer 3 is "U" shape, the height of the first corrugated paper layer 2 and the second corrugated paper layer 3 is 3.0mm-4.2mm, preferably 3.0mm, 3.5mm, 3.8mm and 4.0mm, and the specific selection can be based on actual needs.

[0017] Further, the corrugated valley of the first corrugated paper layer 2 corresponds to the corrugated peak of the second corrugated paper layer 3, and this structure can improve the overall buffering performance of the paperboard.

[0018] The surface paper layer 1 and the bottom paper layer 4 are kraft paper, the thickness of the surface paper layer and the bottom paper layer is 0.3mm-0.6mm, preferably the thickness is 0.3mm, 0.4mm, 0.5mm and 0.6mm, which can be selected according to actual needs.

[0019] The above merely describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any equivalent modifications or changes made by those skilled in the art according to the disclosed content of the present application shall be included in the protection scope recorded in the claims.

Claims

1. A waterproof composite paperboard, characterized by: The paper includes top paper layer (1), first corrugated paper layer (2), second corrugated paper layer (3) and bottom paper layer (4) distributed from top to bottom, top paper layer (1) and first corrugated paper layer (2) are bonded by first adhesive layer (5), first corrugated paper layer (2) and second corruggated paper layer (3) are bonded by second adhesive layer (6), second corrugated paper layer (3) and bottom paper layer (4) are bonded by third adhesive layer (7), the outer surface of top paper layer (1) and the outer surface of bottom paper layer (4) are provided with waterproof layer (8), the outer edge of top paper layer (1) is bent downward to form side wrapping part (101), the inner side of side wrapping part (101) is bonded with the outer edge of first corrugated paper layer (2), the outer edge of second corrugated paper layer (3) and the outer edge of bottom paper layer (4).

2. A waterproof composite paperboard according to claim 1, characterized in that: The waterproof layer (8) is one of waterproof film layer, wax coating layer and nano coating layer.

3. The waterproof composite paperboard according to claim 1, wherein: The bottom end of side wrapping part (101) is flush with the lower end surface of bottom paper layer (4).

4. The waterproof composite paperboard according to claim 1, wherein: The corrugation shape of first corrugated paper layer (2) and second corrugated paper layer (3) is all "U" shape, the height of first corrugated paper layer (2) and second corrugated paper layer (3) is 3.0mm-4.2mm.

5. The waterproof composite paperboard according to claim 1, wherein: The corrugation valley of first corrugated paper layer (2) corresponds to the corrugation peak of second corrugated paper layer (3).

6. A waterproof composite paperboard according to claim 1, characterized in that: The top paper layer (1) and bottom paper layer (4) are all kraft paper, the thickness of top paper layer and bottom paper layer is 0.3mm-0.6mm.

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