Advantages of 4-layer composite corrugated board
Corrugated cardboard box has excellent properties such as light weight, compression resistance, puncture resistance, tear resistance, cushioning, shockproof, easy processing and forming, and good decoration and printing suitability. It can be recycled and reused without pollution to the environment, and its use range is increasing. The wider it is, the faster and faster its development. At present, corrugated cardboard has become one of the most widely used packaging materials in modern packaging. Whether it is transportation packaging or sales packaging, the corrugated cardboard box processed by it has become one of the most important packaging forms for commodity packaging.
However, at present, each layer of corrugated cardboard produced or used by carton manufacturers is usually composed of two layers of paper, one or more layers of corrugated core paper, and most of the corrugated cardboard is 3 layers, 5 layers, and 7 layers of corrugated cardboard. For corrugated cardboard with 4 or 6 layers, for corrugated cardboard with more than 5 layers, the thickness of the corrugated board makes the box itself bloated, reducing the available space; on the other hand, some products have a buffer and strength The requirements of 3 layers and 5 layers of corrugated cardboard can be satisfied. Since there is no product between the two to choose from, only 5 layers of corrugated cardboard can be used, causing a certain sense of waste. The 4-layer composite corrugated board is a better choice to solve this problem.
1 Structure of 4-layer composite corrugated cardboard
4-layer composite corrugated paperboard is a kind of paperboard made of two layers of corrugated core paper between the backing paper and face paper, that is, the corrugated core type is a double-layer core paper bonded by a special adhesive to make the adhesive Penetrate between the fibers of the cardboard, and then form a special corrugated structure formed by corrugating roller. Compared with corrugated cardboard with single-layer core paper, the core paper of 4-layer composite corrugated board is two layers, and a large amount of adhesive is coated between the core paper, the hardness of the core paper increases, and the pressure of corrugated roll forming corrugated paper is also Increase accordingly. The 4-layer composite corrugated cardboard corrugated type usually includes 2A type, 2B type and 2C type. 2A corrugated cardboard has a small number of corrugations and a large corrugation height, so it has good shock absorption and buffering performance; 2B corrugated cardboard is the opposite of 2A corrugated cardboard. The number of corrugations per unit length is large, and the corrugation height is small, so its plane resistance Strong pressure and good flatness; the performance of 2C corrugated board is between 2A and 2B corrugated board.
2 Packing and printing performance of 4-layer composite corrugated board
The performance of 4-layer composite corrugated board is similar to that of 5-layer corrugated board. Except for a certain gap between the burst resistance and the 5-layer corrugated board, the performance indicators such as puncture strength and compressive strength are similar to the 5-layer, and the edge pressure strength It is also stronger than 5-layer cardboard, so it can be seen that the protection performance of 4-layer composite corrugated cardboard is equivalent to that of 5-layer corrugated cardboard. The corrugated cardboard box made of it has comparable performance indexes as 5-layer corrugated cardboard. Therefore, the packaging performance of 4-layer composite corrugated board is not significantly lower than that of 5-layer corrugated board, but some performance indicators have increased.
Corrugated boxes are usually printed by flexographic, lithographic and screen printing methods, especially corrugated boxes formed by large corrugated and super-large corrugated boxes. Due to their good cushioning performance, the printing performance of these corrugated boxes is reduced, and pre-printing is often used. The printing method is printing, the printing efficiency is low, and the cost is high; because the 4-layer composite corrugated cardboard has an additional layer of core paper, its compressive strength is increased compared with the 3-layer corrugated cardboard, the printing performance is improved, and the product printing can be improved. To increase the value of packaging products.
3 The economic benefit analysis and market prospect of the 4-layer composite corrugated board
1) Economic benefits
In Guangdong, there are more than 3,000 corrugated box production enterprises, more than 600 corrugated paper production lines, and the output of corrugated box is nearly 4 million tons, with an output value of more than 18 billion yuan. The output of Guangdong accounts for 1/3 of the national output. If 30% of the five-layer corrugated cardboard is replaced by four-layer composite corrugated boxes, the annual output value will reach 3.7 billion yuan, which can also save raw material resources such as base paper and reduce energy consumption during the manufacturing process. The key equipment for cardboard production can also save a lot of capital for imported equipment, and the economic and social benefits are obvious.
4-layer composite corrugated board uses one layer less paper than 5-layer corrugated paper, which can save costs by more than 10%. The use of the new corrugated cardboard material can enhance the packaging protection of goods, and it is easy to print, while reducing packaging costs.
2) Market outlook
The per capita share of forest resources in China is only 1/4 of the world average, so the application of wood packaging in China is greatly restricted, and the development of alternative packaging has become an urgent problem to be solved. From a global perspective, all countries are facing the contradiction between economic development and non-renewable resources. Sustainable development has become the theme of the 21st century. With the progress of society, the total amount of economic development is rising, and the commodities produced are becoming more and more abundant. People pay more attention to the protection of commodities in the manufacturing, circulation, storage and sales process, and almost all commodities are inseparable from effective packaging. Among the many substitute wood packaging materials, corrugated cardboard occupies the leading position of carton packaging due to its superior performance and low cost.
The performance of developing 4-layer corrugated board is similar to that of 5-layer corrugated board. From the perspective of economic performance, 4-layer corrugated board has high strength and low basis weight in a certain range, and the volume of the carton itself is reduced due to the reduction of the thickness of the single cardboard , Correspondingly expand the storage volume per unit volume, saving a certain amount of storage and transportation costs. At the same time, the carton cost can be reduced on the basis of improving the carton strength, and the cost can be saved by more than 10% due to the saving of one layer of paper. Therefore, the 4-layer composite corrugated board conforms to the development trend of corrugated boxes and the development trend of the conservation-oriented society currently advocated. It is a packaging material with great potential and good market prospects.
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