Moisture-proof and anti-warping paperboard

Abstract

The utility model relates to the technical field of paperboard, in particular to a moisture-proof and anti-warping paperboard, comprising an upper paper layer, a first grid layer, a fiber layer, a second grid layer and a lower paper layer which are sequentially bonded and arranged; the fiber layer comprises a plurality of fibers and glue filling the gaps between the fibers; the plurality of fibers are all on the same horizontal plane, and the utility model can make the paperboard have the characteristics of moisture-proof and anti-warping, and its simple structure can also simplify the production process and reduce the production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of paperboard, and specifically relates to a moisture-proof and anti-warping paperboard. Background Art

[0002] In modern society, products are mass-produced every day. At the same time, with the production of these products, they need better outer packaging to ensure that the quality of the products will not be damaged by the outside world during transportation or sales and storage. For most products, the outer packaging is generally protectively packaged in cartons made of corrugated cardboard. Based on the above reasons, a good corrugated cardboard is of great importance for making a carton with better performance. The existing corrugated cardboard has a single structure. For example, a patented anti-bending corrugated cardboard with announcement number CN218228230U achieves the purpose of anti-bending and anti-insect by arranging cavities, grooves, camphor wood strips, dustproof mesh panels and other components in the cardboard. The disadvantage is that the internal structure of the cardboard is too complicated, which is time-consuming and labor-intensive to manufacture, increases the production cost, and is not conducive to large-scale promotion. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a moisture-proof and warping-resistant paperboard, which not only enables the paperboard to have the characteristics of moisture-proof and warping-resistant, but also its simple structure can simplify the production process and reduce the production cost.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a moisture-proof and anti-warping paperboard, comprising an upper paper layer, a first grid layer, a fiber layer, a second grid layer and a lower paper layer bonded in sequence; the fiber layer comprises a plurality of fibers and glue filled in the gaps between the fibers; the plurality of fibers are all on the same horizontal plane.

[0005] Preferably, the plurality of fibers are randomly distributed.

[0006] Preferably, the fiber is bamboo fiber or plastic fiber.

[0007] Preferably, the length of the fiber is 5 to 10 mm.

[0008] Preferably, the first grid layer and the second grid layer have the same structure.

[0009] Preferably, the mesh number of the first mesh layer is 10-20 meshes.

[0010] Preferably, the first mesh layer is made of plastic or nylon.

[0011] Preferably, the upper paper layer is made of corrugated paper.

[0012] Preferably, the lower paper layer is made of corrugated paper.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: by arranging a first grid layer, a fiber layer and a second grid layer between the upper paper layer and the lower paper layer, the fiber layer is composed of a plurality of randomly laid fibers, and polyvinyl acetate glue is also filled in the gaps between the fibers to make the laid fibers become a whole, the fiber layer can effectively hinder the expansion of micro cracks inside the paperboard and the formation of macro cracks, and significantly improve the tensile, bending, impact and fatigue resistance of the paperboard. In summary, through such an arrangement, the paperboard not only has the advantages of light weight, high strength, anti-warping, moisture-proof, etc., but also has a simple structure, is convenient and quick to produce, can reduce production costs, and is suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the paperboard of the utility model;

[0015] Figure 2 It is a schematic diagram of the fiber layer and mesh layer structure of the utility model.

[0016] In the figure: 1 upper paper layer, 2 first mesh layer, 3 fiber layer, 4 second mesh layer, 5 lower paper layer. DETAILED DESCRIPTION

[0017] The following describes the specific implementation of the utility model in detail in conjunction with the accompanying drawings so that those skilled in the art can more clearly understand how to practice the utility model. Although the utility model is described in conjunction with its preferred specific embodiments, these embodiments are only illustrative, rather than limiting the scope of the utility model.

[0018] Most of the existing packaging cartons are made of corrugated paper, and the corrugated paperboard is made by gluing the upper paper layer, the lower paper layer and the corrugated paper processed into corrugated corrugation. According to the needs of commodity packaging, the corrugated paperboard can be processed into single-sided corrugated paperboard, three-layer corrugated paperboard, five-layer, seven-layer, eleven-layer corrugated paperboard and the like. Single-sided corrugated paperboard is generally used as a lining protective layer for commodity packaging or to make a lightweight card grid and a pad to protect the vibration or collision of the commodity during storage and transportation. Three-layer and five-layer corrugated paperboards are commonly used in making corrugated paperboard boxes. The packaging of many commodities is simply and beautifully packaged by three-layer or five-layer corrugated paperboards, but the carton of this multi-layer corrugated paperboard is to increase the thickness and weight of the paperboard in exchange for the compression and bending resistance. At the same time, in a humid environment, the multi-layer corrugated paperboard is easy to absorb moisture, causing the paperboard to soften and mold. Based on this, developing a moisture-proof, anti-warping and light and thin paperboard is the focus of discussion in this application.

[0019] Specific embodiment 1: Please refer to Figure 1-2A moisture-proof and anti-warping paperboard comprises: an upper paper layer 1, a first grid layer 2, a fiber layer 3, a second grid layer 4 and a lower paper layer 5. The upper paper layer 1, the first grid layer 2, the fiber layer 3, the second grid layer 4 and the lower paper layer 5 are stacked in sequence from top to bottom, and the layers are bonded with glue, so that the paperboard has the advantages of light weight, high strength, anti-warping, moisture resistance and the like.

[0020] The main body of the fiber layer 3 is composed of a number of randomly laid fibers, and the gaps between the fibers are filled with polyvinyl acetate glue to make the laid fibers a whole. During implementation, the fibers can be bamboo fibers or plastic fibers, which have the advantages of light weight, good rigidity and low price. In addition, in order to ensure the compression and warping resistance of the fiber layer 3, the length of the fibers can be 5~10mm.

[0021] The first grid layer 2 and the second grid layer 4 have the same structure; the first grid layer 2 is made of plastic or nylon. Generally speaking, the plastic can be PP (polypropylene) and PET, which are more durable than nylon; further, the first grid layer 2 and the second grid layer 4 both limit the randomly laid fibers so that the fibers are kept in the same horizontal plane as much as possible to ensure the flatness of the paperboard. From a production perspective, the arrangement of the first grid layer 2 and the second grid layer 4 can also improve the production efficiency; in this embodiment, the mesh number of the first grid layer 2 can be 10-20 meshes. The higher the mesh number, the stronger the moisture resistance and anti-warping performance of the paperboard. However, the higher the mesh number, the higher the cost of the grid layer. Therefore, the specific mesh number can be determined according to product requirements and production costs during production.

[0022] When producing the paperboard, the second grid layer 4 needs to be laid flat in the mold first, and then the fibers are laid flat on the second grid layer 4, and the fibers are placed on the same horizontal plane as much as possible to reduce stacking. Then, the first grid layer 2 is laid flat on the fiber layer 3, and then glue is poured into the mold to cover the first grid layer 2. After the glue is completely solidified, the lower paper layer is bonded to the lower end of the second grid layer 4 and the upper paper layer 1 is bonded to the first grid layer 2. After the glue is completely solidified, the production process is completed. The whole process is simple and fast, which can reduce production costs.

[0023] In this embodiment, the thickness of the upper paper layer 1 and the lower paper layer 5 can be adjusted according to production needs; in addition, the upper paper layer 1 and the lower paper layer 5 can also be made of corrugated paper.

[0024] Through the technical solution, by arranging the first grid layer, the fiber layer and the second grid layer between the upper paper layer and the lower paper layer, the fiber layer is composed of a plurality of randomly laid fibers, and the gaps between the fibers are also filled with polyvinyl acetate glue to make the laid fibers become a whole. The fiber layer can effectively hinder the expansion of micro cracks inside the paperboard and the formation of macro cracks, and significantly improve the tensile, bending, impact and fatigue resistance of the paperboard. In summary, through such an arrangement, the paperboard not only has the advantages of light weight, high strength, anti-warping, moisture-proof, etc., but also has a simple structure, is convenient and quick to produce, can reduce production costs, and is suitable for promotion.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A moisture-proof and anti-warping paperboard, characterized in that: It comprises an upper paper layer (1), a first mesh layer (2), a fiber layer (3), a second mesh layer (4) and a lower paper layer (5) which are bonded in sequence; the fiber layer (3) comprises a plurality of fibers and glue filling gaps between the fibers; the plurality of fibers are all on the same horizontal plane.

2. The moisture-proof and warping-resistant paperboard according to claim 1, characterized in that: Some fibers are distributed randomly.

3. The moisture-proof and warping-resistant paperboard according to claim 1, characterized in that: The fiber is bamboo fiber or plastic fiber.

4. The moisture-proof and warping-resistant paperboard according to claim 1, characterized in that: The length of the fiber is 5 to 10 mm.

5. The moisture-proof and warping-resistant paperboard according to claim 1, characterized in that: The first mesh layer (2) and the second mesh layer (4) have the same structure.

6. The moisture-proof and warping-resistant paperboard according to claim 1 or 5, characterized in that: The mesh number of the first mesh layer (2) is 10 to 20 meshes.

7. The moisture-proof and warping-resistant paperboard according to claim 1 or 5, characterized in that: The first mesh layer (2) is made of plastic or nylon.

8. The moisture-proof and warping-resistant paperboard according to claim 1, characterized in that: The upper paper layer (1) is made of corrugated paper.

9. The moisture-proof and warping-resistant paperboard according to claim 1 or 8, characterized in that: The lower paper layer (5) is made of corrugated paper.

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