Cushioning packaging materials play the role of cushioning and shock absorption in the product circulation process, protecting the product from external damage, so it is often used in the protective packaging of the product.
At present, the commonly used cushioning packaging materials are mainly divided into:
(1). Paper quality: According to the structure, it can be divided into corrugated cardboard, honeycomb cardboard, pulp molded products, etc.;
(2). Plastic: According to the structure, it can be divided into air cushion, plastic film, foam plastic, and so on.
Paper cushioning packaging materials
The development of paper cushioning packaging materials originated in the 19th century. It has been widely used due to a series of advantages such as low cost, comprehensive sources of raw materials, environmental protection, easy cutting, and easy folding. Paper cushioning packaging materials are all made through a particular processing method. The material has a unique buffer structure, and the system is deformed and absorbs energy to achieve buffering and damping.
1. Corrugated cardboard
Corrugated cardboard refers to the multi-layer cardboard formed by processing the corrugated base paper into a fluted shape and then glued together with the box cardboard in a certain way. It belongs to the corrugated sandwich board structure. Corrugated cardboard provides cushioning in two ways in the application:
①.The material itself provides a buffering effect, and the corrugated structure formed by corrugated core paper is deformed and absorbs energy;
②. The material and the folded structure provide cushioning. After the corrugated cardboard is tucked into a particular shape, the folded configuration and the corrugated installation provide cushioning together. Corrugated cardboard has the characteristics of environmental protection, easy cutting, easy die-cutting, easy bonding, and low cost. It can be used in the cushioning packaging of small electronic products and large home appliances.
2. Honeycomb cardboard
Honeycomb paperboard is based on the principle of the natural honeycomb structure. The corrugated paper is glued and bonded into countless hollow regular hexagons to form a whole force-receiving part similar to the I-beam web, namely the honeycomb paper core. The two sides of the paper are bonded to form a honeycomb sandwich board structure cushioning material, so the honeycomb paper core becomes the main structure of the honeycomb paperboard for cushioning.
It has the characteristics of low cost, lightweight, high strength, and easy recycling. The material cost of ordinary honeycomb cardboard is about two-thirds of heavy seven-layer corrugated cardboard with the same power. Compared with other various sheet structures, It has the most significant strength/quality ratio. The front side of ordinary honeycomb cardboard can withstand 2-5Kg^cm2, which is 5 to 30 times that of regular corrugated cardboard. It is widely used in electronic and electrical products, electromechanical products, precision instruments, household appliances, and fragile items—cushioning packaging. However, when the honeycomb paperboard is impacted by excessive force since the deformation of the honeycomb paperboard is irreversible, the cushioning performance perpendicular to the direction of the honeycomb core is poor.
3. Pulp molding
Pulp mold is made of waste paper and other plant fibers as the primary raw material, adding rosin gum, paraffin wax latex, or wet strength agents such as rosin, paraffin wax latex, and other damp strength agents to be beaten. It is formed on a metal mesh model, dried, and shaped to conform to the outline of the contents—the structure of cushioning products. Pulp molded product cushioning pad absorbs external force energy through its own structural deformation or even destruction, thereby protecting the product from impact or vibration in the circulation process, so it belongs to the structure deformation cushioning method.
The advantage is that it has a wide range of sources of raw materials, such as waste newspapers, corrugated cardboard scraps, etc., lightweight, convenient storage and transportation, low cost, a particular strength, rigidity, and cushioning properties, and can be molded into the same shape as the product outline, with cushioning, Positioning and anti-collision in one, easy to recycle and reusable. However, due to the influence of drying, energy consumption, and other factors, the thickness of the pulp mold is limited, so it cannot be used for cushioning packaging of heavy products; it is not resistant to multiple impacts, has poor elastic recovery performance, and cushioning performance is not as good as foam plastics, so it is mainly used for electromechanical Cushion packaging of products and some foods.
Plastic is an artificial synthetic material invented at the beginning of the 20th century. It was soon widely used in the packaging industry due to its excellent performance. It is characterized by various varieties, superior performance, wide application, and excellent protection.
Air Cushion Bag is a new type of bearing and cushioning material structure. It is filled with air in a plastic film to form a burst of uniform and continuous bubbles. The shapes of the bubbles are mainly columnar, semicircular, and bell-shaped. The cushioning mechanism uses the compressibility of the gas in the bubble to realize the elastic function, absorb the impact energy, and protect the package from vibration and impact damage to achieve the purpose of protecting the product. The cushioning performance of the Air Cushion Bag is mainly affected by factors such as the thickness of the air cushion film, the initial inflation pressure, and the size of the air column.
The advantage of the Air Cushion Bag is that it is a flat shape during storage and transportation, which saves storage space and reduces transportation costs. The surface of the film is relatively smooth. Under the load of O.O5kgf/cm^2, the creep value is six months. No more than 30%, with excellent cushioning performance, it is widely used in cushioning packaging for precision instruments and some foods. However, in the application, it should be noted that it cannot be used as packaging for heavy or sharp objects so as to avoid crushing or piercing the bubbles and destroying the material to lose its cushioning effect.