Waterproof flame-retardant corrugated board

Abstract

The utility model relates to the technical field of corrugated boards, in particular to a waterproof flame-retardant corrugated board. According to the technical scheme, the waterproof and flame-retardant corrugated board comprises an outer waterproof and flame-retardant layer, an inner waterproof and flame-retardant layer is arranged on one side of the outer waterproof and flame-retardant layer, and a corrugated core layer and a reinforcing layer are arranged between the outer waterproof and flame-retardant layer and the inner waterproof and flame-retardant layer. The waterproof flame-retardant cable is relatively simple in preparation process, high in production efficiency, relatively low in cost and beneficial to large-scale production, popularization and application, moisture invasion can be effectively prevented through mutual matching of the outer waterproof flame-retardant layer and the inner waterproof flame-retardant layer, meanwhile, when a fire disaster occurs, the intumescent flame retardant can quickly play a role to prevent flame from spreading, and the service life of the flame-retardant cable is prolonged. The waterproof and flame-retardant paper board has the advantages that the waterproof and flame-retardant effects are remarkable, the use requirements in various complex environments can be met, the strength and toughness of the paper board are greatly improved through the mutual matching of the reinforcing layer and the corrugated core layer, and when the paper board is impacted or extruded by external force, internal articles can be better protected, and the paper board is not easy to deform or damage.

Description

Technical Field

[0001] This utility model relates to the field of corrugated board technology, and in particular to a waterproof and flame-retardant corrugated cardboard. Background Technology

[0002] Corrugated cardboard, a commonly used packaging material, is widely used in various fields due to its advantages such as light weight, high strength, and low cost. However, in actual use, ordinary corrugated cardboard suffers from poor waterproofing and insufficient flame retardancy. When items packaged in corrugated cardboard encounter humid environments or come into contact with moisture, the cardboard absorbs water and softens, leading to a decrease in strength and severely affecting the stability of the packaging and its protective function. In some fire-prone locations, ordinary corrugated cardboard is highly flammable, not only failing to protect the contents but also contributing to the spread of fire, causing serious economic losses and safety hazards. Currently, some waterproof or flame-retardant corrugated cardboard products on the market often cannot simultaneously achieve waterproofing and flame retardancy, or have complex manufacturing processes and high costs, making it difficult to meet the diverse needs of the market. Therefore, we propose a waterproof and flame-retardant corrugated cardboard. Utility Model Content

[0003] The purpose of this invention is to address the problems existing in the background technology by proposing a waterproof and flame-retardant corrugated cardboard.

[0004] The technical solution of this utility model is as follows: A waterproof and flame-retardant corrugated cardboard includes an outer waterproof and flame-retardant layer, an inner waterproof and flame-retardant layer is provided on one side of the outer waterproof and flame-retardant layer, a corrugated core layer and a reinforcing layer are provided between the outer waterproof and flame-retardant layer and the inner waterproof and flame-retardant layer, the corrugated core layer includes a flute core, and multiple sets of reinforcing flutes are provided on both the upper and lower sides of the flute core, the reinforcing layer includes a first reinforcing layer on one side of the outer waterproof and flame-retardant layer and a second reinforcing layer on one side of the inner waterproof and flame-retardant layer.

[0005] Preferably, the surfaces of both the outer and inner waterproof and flame-retardant layers are coated with a waterproofing agent and a flame retardant, and the outer and inner waterproof and flame-retardant layers have the same thickness.

[0006] Preferably, the core is arranged in a "V" shape and the reinforcing rib is arranged in a "U" shape, and multiple sets of reinforcing ribs are installed at the outer sides of the included angle with the core.

[0007] Preferably, both the first reinforcing layer and the second reinforcing layer are made of glass fiber reinforced polypropylene composite material.

[0008] Preferably, the first reinforcing layer, the outer waterproof and flame-retardant layer, and multiple sets of reinforcing ribs on one side of the core are hot-pressed into a single unit.

[0009] Preferably, the second reinforcing layer, the inner waterproof and flame-retardant layer, and the multiple sets of reinforcing ribs on the other side of the core are hot-pressed into a single unit.

[0010] Compared with the prior art, the present invention has the following beneficial technical effects:

[0011] The preparation process of this utility model is relatively simple, requiring no complex equipment or special raw materials. It has high production efficiency and low cost, which is conducive to large-scale production and application. The combination of an outer waterproof and flame-retardant layer and an inner waterproof and flame-retardant layer can effectively prevent the intrusion of moisture. At the same time, in the event of a fire, the intumescent flame retardant can quickly take effect to prevent the spread of flames. The waterproof and flame-retardant effects are significant, which can meet the needs of use in various complex environments. The combination of a reinforcing layer and a corrugated core layer greatly improves the strength and toughness of the cardboard, enabling it to better protect the internal items when subjected to external impact or compression, and to prevent deformation or damage. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a side view of the present invention;

[0014] Figure 3 This is an exploded view of the structure of this utility model.

[0015] Reference numerals: 1. Outer waterproof and flame-retardant layer; 2. Inner waterproof and flame-retardant layer; 3. Corrugated core layer; 31. Corrugated core; 32. Reinforcing corrugation; 4. Reinforcing layer; 41. First reinforcing layer; 42. Second reinforcing layer. Detailed Implementation

[0016] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] Example

[0018] like Figure 1-3As shown, this utility model proposes a waterproof and flame-retardant corrugated cardboard, including an outer waterproof and flame-retardant layer 1, and an inner waterproof and flame-retardant layer 2 disposed on one side of the outer waterproof and flame-retardant layer 1. The surfaces of the outer waterproof and flame-retardant layer 1 and the inner waterproof and flame-retardant layer 2 are both coated with a waterproofing agent and a flame retardant. The waterproofing agent is an organosilicon waterproofing agent, which has good waterproof performance and can form a dense waterproof film on the paper surface to prevent moisture intrusion. The flame retardant is an intumescent flame retardant, mainly composed of ammonium polyphosphate, pentaerythritol and melamine. At high temperature, the intumescent flame retardant will expand and carbonize to form a heat-insulating and oxygen-barrier carbonaceous foam layer, thereby preventing the spread of flames. The outer waterproof and flame-retardant layer 1 and the inner waterproof and flame-retardant layer 2 have the same thickness. The combination of the outer and inner waterproof and flame-retardant layers can effectively prevent moisture intrusion. At the same time, in the event of a fire, the intumescent flame retardant can quickly take effect to prevent the spread of flames. The waterproof and flame-retardant effects are significant and can meet the needs of use in various complex environments.

[0019] A corrugated core layer 3 and a reinforcing layer 4 are provided between the outer waterproof and flame-retardant layer 1 and the inner waterproof and flame-retardant layer 2. The corrugated core layer 3 includes a corrugated core 31, which is arranged in a "V" shape. Multiple sets of reinforcing ribs 32 are provided on both the upper and lower sides of the corrugated core 31. The reinforcing ribs 32 are arranged in a "U" shape and are installed at the outer side of the included angle with the corrugated core 31. The two ends of the reinforcing ribs 32 are fixedly connected to the corrugated core 31. The structure of the corrugated core 31 and the multiple sets of reinforcing ribs 32 has good buffering performance and compressive strength. The reinforcing layer 4 includes a first reinforcing layer 41 on one side of the outer waterproof and flame-retardant layer 1 and a second reinforcing layer 42 on one side of the inner waterproof and flame-retardant layer 2. Both the first reinforcing layer 41 and the second reinforcing layer 42 are made of glass fiber reinforced polypropylene composite material. Glass fiber has high strength and high modulus, which can significantly improve the strength and toughness of paperboard. Polypropylene has good processing performance and chemical stability. The first reinforcing layer 41 is integrated with the outer waterproof and flame-retardant layer 1 and multiple sets of reinforcing flutes 32 on one side of the corrugated core 31 by hot pressing. The second reinforcing layer 42 is integrated with the inner waterproof and flame-retardant layer 2 and multiple sets of reinforcing flutes 32 on the other side of the corrugated core 31 by hot pressing. The combination of reinforcing layer 4 and corrugated core layer 3 greatly improves the strength and toughness of paperboard, making it better able to protect the contents when subjected to external impact or compression, and less prone to deformation or damage. The overall paperboard manufacturing process is relatively simple, does not require complex equipment and special raw materials, has high production efficiency and low cost, and is conducive to large-scale production and application.

[0020] In this embodiment, the outer waterproof and flame-retardant layer 1, the inner waterproof and flame-retardant layer 2, the corrugated core layer 3, and the reinforcing layer 4 are prepared respectively. First, the silicone waterproofing agent and the intumescent flame retardant are mixed evenly in a certain proportion, and then coated on the surface of paper by a coating machine. The mixture is dried at a temperature of 100-120°C to obtain the outer waterproof and flame-retardant layer 1 and the inner waterproof and flame-retardant layer 2. Then, the glass fiber and polypropylene are mixed in a certain proportion and extruded by an extruder to obtain the glass fiber reinforced polypropylene composite material. The composite material is then cut into appropriate sizes to obtain the first reinforcing layer 41 and the second reinforcing layer 42. The corrugated base paper is then processed into U-shaped and V-shaped corrugated structures by a corrugating machine to obtain the corrugated core 31 and the reinforcing corrugation 32 respectively. Finally, the reinforcing corrugation 32 is bonded and fixed at equal intervals on both sides of the corrugated core 31 to form the corrugated core layer 3.

[0021] The prepared outer waterproof and flame-retardant layer 1, first reinforcing layer 41, corrugated core layer 3, second reinforcing layer 42 and inner waterproof and flame-retardant layer 2 are placed in sequence and hot-pressed together using a hot press at 150-180℃ and 1-3MPa for 5-10 minutes, thereby completing the production of waterproof and flame-retardant corrugated cardboard.

[0022] The above-described specific embodiments are merely preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above-described specific embodiments.

Claims

1. A waterproof fire-retardant corrugated paperboard comprising an outer waterproof fire-retardant layer (1), characterized in that: The outer waterproof and flame-retardant layer (1) is provided with an inner waterproof and flame-retardant layer (2) on one side, and a corrugated core layer (3) and a reinforcing layer (4) are arranged between the outer waterproof and flame-retardant layer (1) and the inner waterproof and flame-retardant layer (2), the corrugated core layer (3) comprises a corrugated core (31), a plurality of reinforcing corrugations (32) are arranged on the upper and lower sides of the corrugated core (31), and the reinforcing layer (4) comprises a first reinforcing layer (41) on one side of the outer waterproof and flame-retardant layer (1) and a second reinforcing layer (42) on one side of the inner waterproof and flame-retardant layer (2).

2. A water-resistant fire-retardant corrugated paperboard according to claim 1, characterized in that, The surfaces of the outer waterproof and flame-retardant layer (1) and the inner waterproof and flame-retardant layer (2) are mixedly coated with waterproof agents and flame-retardant agents, and the thicknesses of the outer waterproof and flame-retardant layer (1) and the inner waterproof and flame-retardant layer (2) are the same.

3. A water-resistant fire-retardant corrugated paperboard according to claim 1, characterized in that, The corrugated core (31) is arranged in a "V" shape, the reinforcing corrugation (32) is arranged in a "U" shape, and a plurality of reinforcing corrugations (32) are correspondingly arranged on the outer side of the included angle of the corrugated core (31).

4. A water-resistant fire-retardant corrugated paperboard according to claim 1, characterized in that, The first reinforcing layer (41) and the second reinforcing layer (42) are both made of glass fiber reinforced polypropylene composite material.

5. A water-resistant fire-retardant corrugated paperboard according to claim 1, characterized in that, The first reinforcing layer (41) is integrally arranged with the outer waterproof and flame-retardant layer (1) and a plurality of reinforcing corrugations (32) on one side of the corrugated core (31) through hot pressing.

6. A water-resistant fire-retardant corrugated paperboard according to claim 1, characterized in that, The second reinforcing layer (42) is integrally arranged with the inner waterproof and flame-retardant layer (2) and a plurality of reinforcing corrugations (32) on the other side of the corrugated core (31) through hot pressing.

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