Moisture-proof and waterproof composite corrugated paperboard

Abstract

The utility model provides a moistureproof waterproof composite corrugated paper board. Moistureproof waterproof composite corruggated paper board includes: corrugated paper board body, bottom waterproof layer, bottom waterproof layer is located in the bottom of corrugated paper board body, the top of bottom waterproof layer is provided with inner layer waterproof layer, the top of inner layer waterproof layer is provided with first composite core layer, the top of first composite core layer is provided with second composite core layer, the top of second composite core layer is provided with waterproof adhesive layer, the top of waterproof adhesive layer is provided with top waterproof layer. The utility model provides moistureproof waterproof composite corrugated paper board, and through the design utilizes first composite core layer and second composite core layer cooperation and provides main buffer and vertical bearing capacity, and can let air circulation, lets water vapor to discharge fast, and then cooperates bottom waterproof layer, inner layer waterproof layer and top waterproof layer and improves the waterproof effect of corrugated paper board.

Description

Technical Field

[0001] This utility model relates to the field of composite corrugated cardboard technology, and in particular to moisture-proof and waterproof composite corrugated cardboard. Background Technology

[0002] Corrugated cardboard is a multi-layer composite packaging material, using corrugated base paper and linerboard as the main raw materials. The corrugated base paper is pressed into a corrugated shape by corrugating rollers, and then the core paper is bonded to the upper and lower linerboard layers with adhesive. Its structure combines the characteristics of being lightweight, sturdy, shockproof, and inexpensive. The corrugated shape is mostly U-shaped, V-shaped, etc., which can absorb impact through deformation. It is widely used in the transportation packaging of various commodities and can be made into different layers and specifications to adapt to various packaging scenarios.

[0003] Composite corrugated cardboard is an upgraded multi-layer composite packaging material based on ordinary corrugated cardboard. It is made by alternately bonding two or more layers of corrugated core paper and linerboard, or by compounding functional films, moisture-proof coatings and other materials. It retains the original corrugated cardboard's cushioning characteristics, while also having stronger load-bearing strength, tear resistance and customized functions. It is suitable for packaging goods in heavy, precision or special environments, and can meet higher protection and transportation requirements.

[0004] A single corrugated core layer has large gaps, which easily trap moisture and cause the cardboard to soften. Although a pure honeycomb core layer has strong compressive strength, it has poor air permeability, and internal moisture cannot escape.

[0005] Therefore, it is necessary to provide moisture-proof and waterproof composite corrugated cardboard to solve the above-mentioned technical problems. Summary of the Invention

[0006] This utility model provides a moisture-proof and waterproof composite corrugated cardboard, which solves the problems of large gaps in a single corrugated core layer, easy softening due to moisture retention, and strong compressive strength but poor air permeability, which prevents internal moisture from escaping.

[0007] To solve the above-mentioned technical problems, the moisture-proof and waterproof composite corrugated cardboard provided by this utility model includes: a corrugated cardboard body; A bottom water-resistant layer is located at the bottom of the corrugated cardboard body. An inner water-resistant layer is provided on top of the bottom water-resistant layer. A first composite core layer is provided on top of the inner water-resistant layer. A second composite core layer is provided on top of the first composite core layer. A water-resistant adhesive layer is provided on top of the second composite core layer. A top water-resistant layer is provided on top of the water-resistant adhesive layer. The bottom water-resistant layer, the inner water-resistant layer, and the top water-resistant layer are all made of water-resistant modified kraft paper. The water-resistant adhesive layer uses water-resistant PVA modified adhesive. The bottom and top water-resistant layers can prevent external dust and slight liquid water from directly contacting the core layer, providing a surface bearing surface and protecting the internal core layer structure from wear. After water-resistant treatment, it is not easy to absorb water and soften, improving the overall moisture resistance of the cardboard. The inner water-resistant layer prevents moisture that may be contained in the contents from penetrating the composite core layer.

[0008] Preferably, the first composite core layer includes a first base layer, a plurality of first support strips and a plurality of rows of arc-shaped honeycomb layers, wherein the plurality of rows of arc-shaped honeycomb layers are located on one side of the first base layer, and the plurality of first support strips are respectively installed between the arc-shaped honeycomb layers and the first base layer; The composite core layer uses high-strength corrugated paper.

[0009] Preferably, the second composite core layer includes a second base layer, multiple rows of buttress honeycomb layers, and multiple second support strips. The multiple rows of buttress honeycomb layers are installed on one side of the second base layer, and the multiple second support strips are installed between the buttress honeycomb layers and the second base layer. Multiple rows of interlocking honeycomb layers are inserted between multiple rows of curved honeycomb layers, and the joints are connected by water-resistant PVA modified adhesive.

[0010] Preferably, the top of the second composite core layer is provided with a mating groove, and a reinforcing component is provided inside the mating groove.

[0011] Preferably, the reinforcing component includes a horizontal reinforcing strip and a plurality of vertical reinforcing strips, which are integrally formed.

[0012] Preferably, the bottom water-resistant layer and the top water-resistant layer comprise an outer layer, a middle layer, and an inner layer, wherein the inner layer is in contact with one side of the water-resistant adhesive layer or the inner water-resistant layer, and the middle layer is located between the inner layer and the outer layer.

[0013] Preferably, the outer layer is made of PE film, the middle layer is made of modified nonwoven fabric, and the inner layer is made of superabsorbent resin.

[0014] Compared with related technologies, the moisture-proof and waterproof composite corrugated cardboard provided by this utility model has the following beneficial effects: This utility model provides a moisture-proof and waterproof composite corrugated cardboard. To improve the waterproof and moisture-proof effect of the composite corrugated cardboard, a channel for moisture conduction is formed in the middle of the corrugated cardboard body by the first and second composite core layers, which can quickly expel moisture and allow air circulation to accelerate drying. At the same time, water-resistant modified kraft paper is used to form a bottom water-resistant layer, an inner water-resistant layer, and a top water-resistant layer, which can prevent external dust and light liquid water from directly contacting the first and second composite core layers, and can also increase wear resistance. Through this design, the first and second composite core layers work together to provide the main cushioning and vertical load-bearing capacity, and allow air circulation to allow moisture to be expelled quickly. Combined with the bottom water-resistant layer, the inner water-resistant layer, and the top water-resistant layer, the waterproof effect of the corrugated cardboard is improved. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of the first embodiment of the moisture-proof and waterproof composite corrugated cardboard provided by this utility model; Figure 2 This invention provides a schematic diagram of the structure of the first composite core layer; Figure 3 Provided for this utility model Figure 2 An enlarged view of point A shown; Figure 4 Provided for this utility model Figure 2 An enlarged view of point B shown; Figure 5 A schematic diagram of the structure of the second embodiment of the moisture-proof and waterproof composite corrugated cardboard provided by this utility model; Figure 6 Provided for this utility model Figure 5 A magnified view of point C shown.

[0016] Numbering in the diagram: 1. Corrugated cardboard body; 101. Bottom water-resistant layer; 102. Inner water-resistant layer; 103. First composite core layer; 1031. First base layer; 1032. First support strip; 1033. Arc-shaped honeycomb layer; 104. Second composite core layer; 1041. Second base layer; 1042. Buttress honeycomb layer; 1043. Second support strip; 105. Water-resistant adhesive layer; 106. Top water-resistant layer; 1061. Outer layer; 1062. Middle layer; 1063. Inner layer; 2. Buttress groove; 3. Reinforcing component; 301. Horizontal reinforcing strip; 302. Vertical reinforcing strip. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] First Embodiment Please refer to the following: Figure 1 , Figure 2 , Figure 3, Figure 4 ,in, Figure 1 A schematic diagram of the structure of the first embodiment of the moisture-proof and waterproof composite corrugated cardboard provided by this utility model; Figure 2 This invention provides a schematic diagram of the structure of the first composite core layer; Figure 3 Provided for this utility model Figure 2 An enlarged view of point A shown; Figure 4 Provided for this utility model Figure 2 The enlarged view at point B is shown. The moisture-proof and waterproof composite corrugated cardboard includes: the corrugated cardboard body 1; A bottom water-resistant layer 101 is located at the bottom of the corrugated cardboard body 1. An inner water-resistant layer 102 is provided on top of the bottom water-resistant layer 101. A first composite core layer 103 is provided on top of the inner water-resistant layer 102. A second composite core layer 104 is provided on top of the first composite core layer 103. A water-resistant adhesive layer 105 is provided on top of the second composite core layer 104. A top water-resistant layer 106 is provided on top of the water-resistant adhesive layer 105. The bottom water-resistant layer 101, the inner water-resistant layer 102, and the top water-resistant layer 106 are all made of water-resistant modified kraft paper. The water-resistant adhesive layer 105 is made of water-resistant modified PVA adhesive. The bottom water-resistant layer 101 and the top water-resistant layer 106 can prevent external dust and slight liquid water from directly contacting the core layer, providing a surface bearing surface and protecting the internal core layer structure from wear. After water-resistant treatment, they are not easy to absorb water and soften, improving the overall moisture resistance of the paperboard. The inner water-resistant layer 102 prevents moisture that may be contained in the contents from penetrating the composite core layer, protecting the surface of the contents from being scratched by the core layer. Together with the outer face paper, they form a two-way protection for the core layer, improving the overall structural stability of the paperboard.

[0019] Please refer to Figure 2 and Figure 3 The first composite core layer 103 includes a first base layer 1031, a plurality of first support strips 1032 and a plurality of rows of arc-shaped honeycomb layers 1033, wherein the plurality of rows of arc-shaped honeycomb layers 1033 are located on one side of the first base layer 1031, and the plurality of first support strips 1032 are respectively installed between the arc-shaped honeycomb layers 1033 and the first base layer 1031. The composite core layer uses high-strength corrugated paper.

[0020] Please refer to Figure 2 and Figure 3 The second composite core layer 104 includes a second base layer 1041, multiple rows of docking honeycomb layers 1042 and multiple second support strips 1043. The multiple rows of docking honeycomb layers 1042 are installed on one side of the second base layer 1041, and the multiple second support strips 1043 are installed between the docking honeycomb layers 1042 and the second base layer 1041. The multi-row buttress honeycomb layer 1042 is inserted between the multi-row arc-shaped honeycomb layer 1033, and the connection is made by water-resistant PVA modified adhesive.

[0021] Please refer to Figure 2 The top of the second composite core layer 104 is provided with a docking groove 2, and a reinforcing component 3 is provided inside the docking groove 2; Reinforcing component 3 can increase the overall strength and tensile properties of composite corrugated cardboard.

[0022] Please refer to Figure 2 and Figure 4 The reinforcing component 3 includes a horizontal reinforcing strip 301 and a plurality of vertical reinforcing strips 302, which are integrally formed. The shapes of the reinforcing component 3 and the docking groove 2 correspond, and the reinforcing component 3 is made of sizing corrugated core paper.

[0023] The working principle of the moisture-proof and waterproof composite corrugated cardboard provided by this utility model is as follows: In the middle of the corrugated cardboard body 1, the first composite core layer 103 and the second composite core layer 104 form a channel for moisture conduction, which can quickly allow moisture to escape and at the same time allow gas circulation to accelerate drying. Meanwhile, water-resistant modified kraft paper is used to form the bottom water-resistant layer 101, the inner water-resistant layer 102 and the top water-resistant layer 106, which can prevent external dust and slight liquid water from directly contacting the first composite core layer 103 and the second composite core layer 104, and can also increase wear resistance.

[0024] Compared with related technologies, the moisture-proof and waterproof composite corrugated cardboard provided by this utility model has the following beneficial effects: To improve the waterproof and moisture-proof performance of the composite corrugated cardboard, a channel for moisture conduction is formed in the middle of the corrugated cardboard body 1 by the first composite core layer 103 and the second composite core layer 104, allowing moisture to escape quickly and air circulation to accelerate drying. Water-resistant modified kraft paper is used to form the bottom water-resistant layer 101, the inner water-resistant layer 102, and the top water-resistant layer 106, preventing external dust and slight liquid water from directly contacting the first and second composite core layers 103 and 104, while also increasing abrasion resistance. This design utilizes the first and second composite core layers 103 and 104 to provide primary cushioning and vertical load-bearing capacity, while allowing air circulation and rapid moisture expulsion. Combined with the bottom water-resistant layer 101, the inner water-resistant layer 102, and the top water-resistant layer 106, the waterproof performance of the corrugated cardboard is enhanced.

[0025] Second Embodiment

[0026] Please refer to the following: Figures 5-6 , Figure 5A schematic diagram of the structure of the second embodiment of the moisture-proof and waterproof composite corrugated cardboard provided by this utility model; Figure 6 Provided for this utility model Figure 5 The enlarged view at point C shows a moisture-proof and waterproof composite corrugated cardboard based on the first embodiment of this application. The second embodiment of this application proposes another moisture-proof and waterproof composite corrugated cardboard. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the independent implementation of the first embodiment.

[0027] Specifically, the difference between the moisture-proof and waterproof composite corrugated cardboard provided in the second embodiment of this application is as follows, please refer to... Figure 5 and Figure 6 The bottom water-resistant layer 101 and the top water-resistant layer 106 include an outer layer 1061, a middle layer 1062 and an inner layer 1063. The inner layer 1063 is in contact with one side of the water-resistant adhesive layer 105 or the inner water-resistant layer 102. The middle layer 1062 is located between the inner layer 1063 and the outer layer 1061.

[0028] The outer layer 1061 is made of PE film, the middle layer 1062 is made of modified non-woven fabric, and the inner layer 1063 is made of superabsorbent resin.

[0029] Compared with related technologies, the moisture-proof and waterproof composite corrugated cardboard provided by this utility model has the following beneficial effects: To improve the water-resistant effect of the bottom water-resistant layer 101 and the top water-resistant layer 106, the bottom water-resistant layer 101 and the top water-resistant layer 106 are divided into an outer layer 1061, a middle layer 1062 and an inner layer 1063. The outer layer 1061 of the PE film directly blocks liquid water and a large amount of moisture. Its heat-sealed edges can prevent moisture from seeping in from the seams of the cardboard. The modified non-woven fabric middle layer 1062, which is both breathable and hydrophobic, not only prevents external moisture from penetrating, but also allows water vapor from the core layer to pass through and evaporate. The inner layer 1063, composed of superabsorbent resin, can quickly absorb the small amount of moisture that seeps in due to damage to the PE film or insufficient edge sealing, and lock it into a solid gel to prevent it from diffusing into the core layer. This design can improve the water-resistant effect of the bottom water-resistant layer 101 and the top water-resistant layer 106.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. Moisture-proof and waterproof composite corrugated cardboard, characterized in that, include: Corrugated cardboard body; The bottom water-resistant layer is located at the bottom of the corrugated cardboard body. An inner water-resistant layer is provided on top of the bottom water-resistant layer. A first composite core layer is provided on top of the inner water-resistant layer. A second composite core layer is provided on top of the first composite core layer. A water-resistant adhesive layer is provided on top of the second composite core layer. A top water-resistant layer is provided on top of the water-resistant adhesive layer. The bottom water-resistant layer, the inner water-resistant layer, and the top water-resistant layer are all made of water-resistant modified kraft paper. The water-resistant adhesive layer uses water-resistant PVA modified adhesive.

2. The moisture-proof and waterproof composite corrugated cardboard according to claim 1, characterized in that, The first composite core layer includes a first base layer, multiple first support strips, and multiple rows of arc-shaped honeycomb layers. The multiple rows of arc-shaped honeycomb layers are located on one side of the first base layer, and the multiple first support strips are respectively installed between the arc-shaped honeycomb layers and the first base layer.

3. The moisture-proof and waterproof composite corrugated cardboard according to claim 1, characterized in that, The second composite core layer includes a second base layer, multiple rows of docking honeycomb layers, and multiple second support strips. The multiple rows of docking honeycomb layers are installed on one side of the second base layer, and the multiple second support strips are installed between the docking honeycomb layers and the second base layer.

4. The moisture-proof and waterproof composite corrugated cardboard according to claim 1, characterized in that, The top of the second composite core layer is provided with a docking groove, and a reinforcing component is provided inside the docking groove.

5. The moisture-proof and waterproof composite corrugated cardboard according to claim 4, characterized in that, The reinforcing component includes a horizontal reinforcing strip and multiple vertical reinforcing strips, which are integrally formed.

6. The moisture-proof and waterproof composite corrugated cardboard according to claim 1, characterized in that, The bottom water-resistant layer and the top water-resistant layer comprise an outer layer, a middle layer, and an inner layer. The inner layer is in contact with one side of the water-resistant adhesive layer or the inner water-resistant layer. The middle layer is located between the inner layer and the outer layer.

7. The moisture-proof and waterproof composite corrugated cardboard according to claim 6, characterized in that, The outer layer is made of PE film, the middle layer is made of modified non-woven fabric, and the inner layer is made of superabsorbent resin.

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