Multi-layer waterproof paperboard

Abstract

The utility model relates to a multilayer waterproof paperboard which comprises a bottom paperboard, a plurality of corrugated paperboards are arranged on the upper surface of the bottom paperboard, a top paperboard is arranged on the upper surface of the uppermost corrugated paperboard, surface paper is arranged on the upper surface of the top paperboard, and a waterproof layer is adhered to the upper surface of the surface paper through an adhesive layer. Through the arrangement of the multiple layers of corrugated boards, the good buffering effect is achieved, the protection performance of the packaging material is improved, the structure is simple, the preparation process is easy to implement, the packaging material is suitable for large-scale production, wood beams and aluminum beams can be replaced in the field of packaging materials, environmental protection and energy saving are achieved, finished products can be cut, combined, inserted and the like according to needs, flexibility is high, and cost is low. The waterproof paperboard is simple in structure and wide in application range, has excellent waterproof performance due to the arrangement of the waterproof layer, and can effectively protect articles contained in the paperboard from being damaged by moisture.

Description

Technical Field

[0001] This utility model relates to the field of paperboard technology, specifically to a multi-layer waterproof paperboard. Background Art

[0002] Paperboard is a material made of multiple layers of pulp bonded together by adhesives or other methods. It has high strength and rigidity and is commonly used for packaging, making boxes, cards, and other items. Its manufacturing typically involves dewatering, pressing, and drying the pulp on forming wires or rollers to form single-layer or multi-layer paper structures.

[0003] Traditional cardboard materials easily absorb moisture in humid environments, leading to deformation. This not only diminishes its aesthetic appeal as packaging material but also severely impacts its protective performance for the contents. Furthermore, for items requiring specific cushioning protection to prevent damage, relying solely on cardboard is often insufficient and fails to meet their protective needs. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer waterproof cardboard that effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A multi-layer waterproof cardboard includes a bottom cardboard, a plurality of corrugated cardboards on the upper surface of the bottom cardboard, a top cardboard on the upper surface of the top corrugated cardboard, a face paper on the upper surface of the top cardboard, and a waterproof layer glued to the upper surface of the face paper by an adhesive layer.

[0007] Therefore, the multi-layer corrugated cardboard achieves excellent cushioning, enhances the protective performance of packaging materials, and has a simple structure. The manufacturing process is easy to implement and suitable for large-scale production. It can replace the use of wood and aluminum in the packaging material field, is environmentally friendly and energy-saving, and the finished product can be cut, combined and interlocked as needed, offering high flexibility and a wide range of applications. Furthermore, the waterproof layer gives the cardboard excellent waterproof performance, effectively protecting the contents from moisture damage.

[0008] Furthermore, the upper surface of the bottom cardboard and the upper surface of the corrugated cardboard are provided with multiple connecting grooves, and the lower surface of the top cardboard and the lower surface of the corrugated cardboard are provided with multiple connecting parts.

[0009] Furthermore, the corrugated cardboard has multiple thickened sections inside, and the connecting grooves are located within these thickened sections.

[0010] Furthermore, corrugated cardboard consists of three layers of core paper, with the core paper having a corrugated structure.

[0011] Furthermore, the connecting groove has an inverted triangular structure, and the connecting part is adapted to the connecting groove.

[0012] Furthermore, the waterproof layer is made of polyethylene.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0014] 1. This utility model achieves a good cushioning effect by setting up multi-layer corrugated cardboard, which improves the protective performance of packaging materials. It has a simple structure, is easy to manufacture, and is suitable for large-scale production. It can replace the use of wood and aluminum squares in the field of packaging materials. It is environmentally friendly and energy-saving. The finished product can be cut, combined and interlocked as needed, which is highly flexible and has a wide range of applications. Furthermore, the waterproof layer gives the cardboard excellent waterproof performance, which can effectively protect the contents from moisture damage.

[0015] 2. This utility model, through the setting of connecting grooves and connecting parts, can realize the free splicing of bottom cardboard, corrugated cardboard and top cardboard. It can freely adjust the number of layers of corrugated cardboard according to usage needs, improving the flexibility of use. Furthermore, when the bottom cardboard, corrugated cardboard and top cardboard are damaged, they can be easily replaced, thereby extending the service life of the entire cardboard and reducing the cost of use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure at center A;

[0019] Figure 4 This is the usage state of the present utility model. Figure 1 ;

[0020] Figure 5 This is the usage state of the present utility model. Figure 2 ;

[0021] Figure 6 This is the usage state of the present utility model. Figure 3 .

[0022] In the diagram: 100, bottom cardboard; 101, corrugated cardboard; 102, top cardboard; 103, face paper; 104, adhesive layer; 105, waterproof layer; 200, connecting groove; 201, connecting part; 300, thickened part. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0025] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0026] Please see Figures 1-3 The present invention provides a multi-layer waterproof cardboard, including a bottom cardboard 100, a plurality of corrugated cardboard 101 on the upper surface of the bottom cardboard 100, a top cardboard 102 on the upper surface of the top corrugated cardboard 101, a face paper 103 on the upper surface of the top cardboard 102, and a waterproof layer 105 glued to the upper surface of the face paper 103 by an adhesive layer 104.

[0027] The bottom cardboard 100 and top cardboard 102 are respectively set on the upper and lower sides of the multi-layer corrugated cardboard 101, serving as the basic layer of the entire structure, providing basic strength and support. The combination of the multi-layer corrugated cardboard 101 effectively improves the compressive strength and cushioning capacity of the cardboard, protecting the contents from external impacts. Furthermore, the corrugated cardboard 101, bottom cardboard 100, top cardboard 102, face paper 103, and waterproof layer 105 can all be folded and bent, allowing them to replace the use of wood and aluminum squares in the packaging material field. This is environmentally friendly and energy-saving. The face paper 103 has a smooth and flat surface, improving the overall aesthetics of the cardboard. The waterproof layer 105 provides excellent waterproof performance, effectively protecting the contents from moisture damage.

[0028] Specifically, the upper surface of the bottom cardboard 100 and the upper surface of the corrugated cardboard 101 are provided with multiple connecting grooves 200, and the lower surface of the top cardboard 102 and the lower surface of the corrugated cardboard 101 are provided with multiple connecting parts 201. Through the setting of connecting grooves 200 and connecting parts 201, the bottom cardboard 100, corrugated cardboard 101 and top cardboard 102 can be freely spliced. The number of layers of corrugated cardboard 101 can be freely adjusted according to usage needs, which improves the flexibility of use. Furthermore, when the bottom cardboard 100, corrugated cardboard 101 and top cardboard 102 are damaged, they can be easily replaced, thereby extending the service life of the entire cardboard and reducing usage costs.

[0029] Specifically, the corrugated cardboard 101 has multiple thickened portions 300 inside, and the connecting groove 200 is disposed within the thickened portions 300. The thickened portions 300 provide space for the connecting groove 200 on the corrugated cardboard 101 and give the connecting groove 200 sufficient structural strength to ensure the stability of the connection between the connecting portion 201 and the connecting groove 200.

[0030] Specifically, corrugated cardboard 101 consists of three layers of core paper with a corrugated structure. The corrugated structure has good deformation ability, thus providing cushioning. Furthermore, the three-layer core paper configuration further enhances the overall compressive strength and cushioning capacity of the cardboard.

[0031] Specifically, the connecting groove 200 has an inverted triangular structure, and the connecting part 201 is adapted to the connecting groove 200. Since the core paper has a wavy structure, and the thickened part 300 is set inside the core paper with an inverted triangular shape, setting the connecting groove 200 to an inverted triangular structure can make full use of the internal space of the thickened part 300 and improve the connection strength.

[0032] Specifically, the waterproof layer 105 is made of polyethylene. The waterproof layer 105 made of polyethylene has a very low water absorption rate, which can effectively prevent water penetration and protect the items inside the cardboard from moisture and humidity. It also has good resistance and is not easily corroded by substances such as acids, alkalis, and greases, so it is suitable for packaging under various environmental conditions.

[0033] This utility model provides a multi-layer waterproof cardboard that can replace other materials such as foam and wood in practical use. Specifically, as shown below... Figure 4 As shown, waterproof cardboard is bent and slotted in the middle to hold wine or other fragile items. Printing can be done directly on the cardboard surface, allowing it to replace traditional packaging boxes and reducing packaging material usage. Figure 5 As shown, waterproof cardboard can be bent into various shapes of furniture such as coffee tables, chairs, etc. Figure 6 As shown, this multi-layer waterproof cardboard has good load-bearing capacity and can replace wooden blocks in packaging, transportation and engineering fields.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A multi-layer waterproof paperboard, comprising a bottom paperboard (100), characterized in that: The upper surface of the bottom cardboard (100) is provided with a plurality of corrugated cardboard (101), and the upper surface of the top corrugated cardboard (101) is provided with a top cardboard (102). The upper surface of the top cardboard (102) is provided with a face paper (103), and the upper surface of the face paper (103) is pasted with a waterproof layer (105) by an adhesive layer (104).

2. The multi-layer waterproof paperboard according to claim 1, characterized in that: The upper surface of the bottom cardboard (100) and the upper surface of the corrugated cardboard (101) are provided with a plurality of connecting grooves (200), and the lower surface of the top cardboard (102) and the lower surface of the corrugated cardboard (101) are provided with a plurality of connecting parts (201).

3. The multi-layer waterproof paperboard according to claim 2, characterized in that: The corrugated cardboard (101) has a plurality of thickened portions (300) inside, and the connecting groove (200) is disposed in the thickened portions (300).

4. The multi-layer waterproof paperboard according to claim 1, characterized in that: The corrugated cardboard (101) consists of three layers of core paper, which has a wavy structure.

5. A multi-layer waterproof paperboard according to claim 2, characterized in that: The connecting groove (200) is an inverted triangular structure, and the connecting part (201) is adapted to the connecting groove (200).

6. The multi-layer waterproof paperboard according to claim 1, characterized in that: The waterproof layer (105) is made of polyethylene.

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