CN202242216U - High-strength corrugated board - Google Patents

Abstract

The utility model discloses a high-strength corrugated paperboard, which is formed by bonding five layers of paper, namely, face paper, two layers of core paper, middle paper and bottom paper, with an adhesive, wherein the height of the corrugated B flute formed by the face paper, the first layer of core paper and the middle paper is 2.5-3.0 mm; the height of the corrugated C flute formed by the middle paper, the second layer of core paper and the bottom paper is 3.5-4.0 mm, and the wave shape formed by the two layers of core paper between the face paper and the middle paper and between the middle paper and the bottom paper is UV-shaped. Compared with the prior art, the above structure adopts a BC flute structure, and the wave shape formed by the two layers of core paper between the face paper and the middle paper and between the middle paper and the bottom paper adopts a UV-shaped structure, which strengthens the pressure bearing capacity of the paperboard. The edge compression strength reaches more than 9000 N/m. The corrugated paperboard can be used to make furniture. Using the paperboard to make furniture not only reduces the cost of furniture, but also reduces the loss of wood, thereby achieving the purpose of environmental protection.

Description

A high-strength corrugated cardboard

technical field

The utility model relates to a high-strength corrugated cardboard, in particular to a high-strength corrugated cardboard which can be used for furniture materials.

Background technique

The Chinese Utility Model Patent No. 200920238501.8 published on October 6, 2010 discloses a waterproof and pressure-resistant corrugated cardboard, including at least two layers of cardboard and corrugated paper arranged between adjacent cardboards. The protruding parts are fixed on the cardboard boards on both sides by adhesive, wherein the surface of the outermost layer of cardboard boards is coated with a waterproof layer. The cross-section of corrugated paper is "U" or connected zigzag, the spacing of the U-shaped structure is 7-9mm, and the tooth pitch of the zigzag is 5-7mm. The utility model can be made into three-layer, five-layer or more-layer corrugated cardboard. Since the outermost surface of the cardboard is provided with an oxidized polyethylene waterproof coating, the carton made by it has waterproof performance. In addition, the U-shaped structure of the corrugated cardboard It is bonded to a larger area of the paper panels on both sides to make the whole stronger and firmer, and the carton has high bearing strength. But paperboard of this structure is still limited to packaging materials.

Utility model content

The purpose of the utility model is to provide a high-strength corrugated cardboard whose strength can be used to make furniture.

The purpose of this utility model is achieved in that:

The utility model is made of face paper, two-layer core paper, middle paper and bottom paper with five layers of paper glued together, wherein the height of the corrugated B flute formed by the face paper, the first layer of core paper and the middle paper is 2.5 -3.0MM; the height of the corrugated C flute formed by the middle paper, the second core paper and the bottom paper is 3.5-4.0MM, and the wave shape formed between the top paper and the middle paper and the middle paper and the bottom paper by the two core papers It is UV shape.

The number of B flutes is 50±2/300MM; the number of C flutes is 38±2/300MM.

A layer of surface coating is coated on the surface of the surface paper and the bottom paper. The surface coating is preferably starch.

The amount of starch distribution on the surface coating of the top paper and bottom paper is 0.8-1.5 g/m ² , preferably 1 g/m ² .

A sizing agent is added to the surface paper, two-layer core paper, middle paper and bottom paper five-layer paper, and the sizing agent is starch.

The corrugated cardboard adhesive is tapioca starch, and the adhesive also includes a moistureproof agent and a bridging agent.

The total thickness of the corrugated cardboard is 6MM-7MM.

Compared with the existing technology, the above-mentioned structure adopts BC flute structure, and the wave shape formed between the top paper and the middle paper and the middle paper and the bottom paper of the two-layer core paper adopts a UV-shaped structure, which strengthens the strength of the cardboard. pressure bearing capacity. The edge compressive strength reaches more than 9000N/m. On this basis, a layer of surface coating is applied on the surface of the surface paper and the bottom paper, which can prevent moisture from entering the cardboard, so that the cardboard can keep dry and maintain stable strength even in wet weather. This corrugated cardboard can be used to make furniture. Using this kind of cardboard to make furniture not only reduces the cost of furniture, but also reduces the loss of wood, and achieves the purpose of environmental protection.

Description of drawings

Fig. 1 is a sectional view of the utility model;

Figure 2 is a partially enlarged view of Figure 1;

FIG. 3 is a schematic cross-sectional view of FIG. 2 with coating.

Marker names in the figure:

1: face paper, 2: first core paper, 3: middle paper, 4: second core paper, 5: backing paper, 6: surface coating, 7: B flute, 8: C flute.

Detailed ways

As shown in Fig. 1-Fig. 3, a kind of embodiment of the present utility model is to be formed by adhesive bonding of face paper 1, two-layer core paper, middle paper 3 and bottom paper 5 five layers of paper, face paper, The height of the corrugated B flute formed by the first core paper 4 and the middle paper is 2.5-3.0MM, which does not include the thickness of the surface paper and the middle paper; the middle paper 3, the second core paper 4 and the bottom paper 5 form The height of corrugated C flute is 3.5-4.0MM, which does not include the thickness of middle paper 3 and bottom paper 5. The wave shape formed between the face paper 1 and the middle paper 3 and the middle paper 3 and the bottom paper 5 by two layers of core paper is a UV shape. Among them, B flute is a technical term in this industry, which refers to the flute height of 2.5-3.0MM, and C flute is also a technical term in this industry, which refers to the flute height of 3.5-4.0MM. As the height of the flute height increases, the horizontal pressure resistance of the cardboard increases, and if the height of the flute height is low, it can reduce the external impact and cause the corrugation to collapse. When making furniture, set the low flute B flute outside, and the high flute The corrugated C flute is inside, which can better protect the corrugated shape and avoid the deterioration of the corrugated shape and the decrease in physical properties. Therefore, the utility model adopts the BC corrugated structure, which takes into account the respective advantages of the corrugated high and corrugated low. The wave shape formed between the top paper and the middle paper and the middle paper and the bottom paper adopts a UV-shaped structure. Among them, U-shaped means that part of the bottom of the wave is linear, and V-shaped means that the bottom of the wave is dot-shaped. The advantage of the U-shaped structure is that the core paper has good adhesion to the upper and lower layers of paper, while the V-shaped The advantages of the structure are good pressure resistance and high strength. The UV-shaped structure means that the wave shape is between the U-shaped and V-shaped, and the advantages of the U-shaped and V-shaped structures can be neutralized by using the UV-shaped structure. On this basis, the number of B flute is 50±2/300MM, and the number of C is 38±2/300MM. Among them, 300MM refers to the length. This is because the number of flutes per unit length can increase the pressure resistance and strength of the cardboard, but too many flutes per unit length will increase the cost. Therefore, choosing the number of flutes in the above range not only meets the strength requirements, but also controls the cost. Appropriate degree.

The surfaces of the surface paper and the bottom paper are coated with a surface coating 6 . The purpose of the surface coating 6 is to prevent moisture from entering the inside of the cardboard, so as to ensure that the cardboard can keep dry, so that the cardboard can maintain stable strength even in wet weather.

Surface coating 6 is preferably starch. The surface coating distribution amount of the top paper and bottom paper is 0.8-1.5 g/m ² . Preferably 1 g/m ² .

In order to further improve the moisture resistance of the cardboard, a sizing agent is added to the five-layer paper of the face paper, the two-layer core paper, the middle paper and the bottom paper. The sizing agent is starch. The method of sizing can be the method of coating, also can add sizing agent in pulp when making pulp. In this way, comprehensive waterproofing is achieved, so that each layer of paper in the cardboard can prevent moisture from entering the paper, thereby providing the overall waterproofness of the cardboard and further stabilizing the strength of the cardboard.

The main component of the adhesive for corrugated cardboard is starch, preferably tapioca starch. In order to increase the adhesiveness and other physical properties of the adhesive, a moisture-proof agent, a bridging agent, etc. can be added to the starch. The moisture-proof agent is selected from caustic soda and borax to further improve the moisture resistance of the cardboard; the bridging agent can be selected from blocked polyisocyanate to further improve the bonding degree of the cardboard. The total thickness of corrugated cardboard is preferably 6MM-7MM.

If this kind of corrugated cardboard is processed and produced with corrugated base paper with better waterproof and compressive properties, its compressive and moisture-proof effects will be better.

This kind of corrugated cardboard can be used to make furniture. When making furniture, various combinations of corrugated cardboard can be used to meet the needs of different furniture.

Under the principles and principles of the present utility model, any replacements or modifications to the above-mentioned embodiments with equivalent functions or effects that can be understood by those skilled in the art belong to the protection scope of the present utility model.

Claims (9)

1. A high-strength corrugated cardboard, which is formed by bonding face paper, two-layer core paper, middle paper and bottom paper with five layers of paper, and is characterized in that: face paper, the first layer of core paper and middle paper are formed The height of the corrugated B flute is 2.5-3.0MM; the height of the corrugated C flute formed by the middle paper, the second core paper and the bottom paper is 3.5-4.0MM; The wave shape formed between the backing paper is UV shape. 2. The corrugated cardboard according to claim 1, characterized in that the number of B flute is 50±2 pieces/300MM; the number of C flute is 38±2 pieces/300MM. 3. The corrugated cardboard according to claim 1, characterized in that the surface paper and the bottom paper are coated with a layer of surface coating. 4. The corrugated board according to claim 3, characterized in that said surface coating is starch. 5. The corrugated cardboard according to claim 4, characterized in that said surface coating is distributed in an amount of 0.8-1.5 g/m ² . 6. The corrugated board according to claim 5, characterized in that the surface coating is distributed in an amount of 1 g/m ² . 7. The corrugated cardboard according to claim 1, characterized in that a sizing agent is added to the face paper, the two-layer core paper, the middle paper and the bottom paper five-layer paper, and the sizing agent is starch. 8. The corrugated board according to claim 1, characterized in that the corrugated board adhesive is tapioca starch. 9. The corrugated cardboard according to claim 1, characterized in that the total thickness of the corrugated cardboard is 6MM-7MM. the

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