News - What are the varieties of corrugated packaging?

Corrugated packaging plays an integral role in modern life. Whether it is logistics and transportation, food packaging, or the protection of retail products, the application of corrugated paper is everywhere ; it can be used to make various box designs, cushions, fillers, coasters, etc. Corrugated paper is widely used in packaging for food, electronics, household goods, toys and other industries due to its high strength, light weight and customizability.

What is corrugated paper?

Corrugated paper is a composite material composed of two or more layers of flat paper and corrugated paper. Its unique structural design gives it light weight, high strength and good cushioning properties, making it an ideal choice for the packaging industry. Corrugated board usually consists of an outer layer of paper, an inner layer of paper and a corrugated core paper sandwiched between the two. Its main feature is the corrugated structure in the middle, which can effectively disperse external pressure and prevent items from being damaged during transportation.

What is the material of corrugated paper?

The main raw material of corrugated paper is pulp, which is usually derived from wood, waste paper and other plant fibers. In order to improve the strength and durability of corrugated paper, a certain proportion of chemical additives such as starch, polyethylene and moisture-proof agents are added during the manufacturing process. The selection of face paper and corrugated medium paper has a direct impact on the quality of the final product. Face paper usually uses higher quality kraft paper or recycled paper to ensure a smooth and beautiful surface; corrugated medium paper needs to have good stiffness and elasticity to provide sufficient support.

What is the difference between cardboard and corrugated cardboard?

Regular cardboard is usually thicker and heavier, while corrugated cardboard is more durable and has a different internal structure that is less dense but stronger, such as a disposable cardboard food box . Corrugated cardboard is made of three layers to provide extra strength and resist wear and tear.

Types of corrugated paper

Corrugated paper can be divided into different types according to its structure and usage requirements. The most common classification method is to distinguish according to the shape and number of layers of corrugation:

1. Single-faced corrugated cardboard: It consists of one layer of outer paper and one layer of corrugated core paper, mainly used for inner packaging and protective layer.

2. Single corrugated cardboard: It consists of two layers of surface paper and one layer of corrugated core paper. It is the most common type of corrugated cardboard and is widely used in various packaging boxes.

3. Double corrugated cardboard: It consists of three layers of surface paper and two layers of corrugated core paper, suitable for heavy-duty and impact-resistant packaging needs.

4. Triple-wall corrugated cardboard: It consists of four layers of surface paper and three layers of corrugated core paper, providing extremely high strength and durability, and is usually used for ultra-heavy packaging and special transportation requirements.

In addition, the corrugated waveforms are also different, such as type A, type B, type C, type E and type F. Different waveforms provide different cushioning properties and strengths to meet the packaging needs of different products.

Corrugated paper production process

The production process of corrugated paper mainly includes pulp preparation, corrugated core paper forming, bonding of face paper and corrugated core paper, cutting and forming, etc. The specific process is as follows:

1. Pulp preparation: Raw materials (such as wood or waste paper) are chemically treated and mechanically beaten to make pulp.

2. Corrugated paper forming: The pulp is formed into corrugated paper through the corrugated rollers. Different corrugated roller shapes determine the wave type of the corrugated paper.

3. Bonding and lamination: Bond the face paper to the corrugated core paper with adhesive to form a single corrugated board. For double-corrugated and triple-corrugated boards, it is necessary to repeatedly bond multiple layers of corrugated core paper and face paper.

4. Cutting and forming: According to customer needs, the corrugated cardboard is cut into different sizes and shapes, and finally formed and packaged.

Throughout the production process, parameters such as temperature, humidity and pressure need to be strictly controlled to ensure the quality and performance of corrugated cardboard.

Application of corrugated paper in disposable packaging products

Corrugated paper is widely used in disposable packaging products, covering various forms such as food packaging boxes, paper cup holders, disposable paper cups, pizza boxes and paper bags.

1. Food packaging boxes: Corrugated food packaging boxes not only have good thermal insulation properties, but also can effectively prevent food from being deformed under pressure. They are often used in fast food, take-out and pastry packaging.

2. Paper cup holder: Corrugated paper cup holder is light and sturdy, can hold multiple paper cups at the same time, and is convenient for consumers to carry and use.

3. Disposable paper cups: Corrugated paper disposable cups not only provide excellent thermal insulation but also reduce environmental pollution, making them an ideal choice for environmentally friendly beverage packaging.

4. Pizza box: Corrugated pizza box has become the standard packaging for pizza takeout because of its high strength and good air permeability, which can maintain the taste and temperature of pizza.

5. Paper bags: Corrugated paper bags have high load-bearing capacity and aesthetics, and are widely used in shopping, gift packaging, and food takeout.

The application of corrugated paper in disposable packaging products not only improves the protective performance of the products, but also conforms to the demand for sustainable development in modern society due to its environmental protection and recyclable characteristics.

Corrugated paper packaging has become the backbone of the modern packaging industry due to its diversity and superior performance. From the selection of raw materials to the improvement of production processes, to the continuous expansion of application areas, corrugated paper packaging has always been adapting to and meeting the diversified needs of the market. In the future, with the advancement of technology and the enhancement of environmental awareness, corrugated paper packaging will continue to play its unique advantages in more fields.

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