The reason why Corrugated cardboard is lightweight but strong is mainly due to its special structure and the selection and processing of materials.
Corrugated cardboard is composed of three layers of paper: the two layers are called the top paper, and the corrugated paper sandwiched in the middle is called the corrugated core material. This structure gives Corrugated cardboard the following characteristics:
Corrugated structure: The corrugated cardboard's middle corrugated layer provides reinforcement and support. These corrugations create a honeycomb-like structure that increases the stiffness and strength of the cardboard while reducing its weight. This structure effectively disperses the external pressure exerted on the cardboard, making it highly resistant to damage.
Material selection and processing: Corrugated cardboard usually uses cellulose-based materials that are lightweight and flexible. These cellulose-based materials combine good stiffness and tensile strength with enough flexibility to make the cardboard less likely to break when subjected to pressure. In addition, cardboard can be enhanced during the production process, such as using appropriate adhesives and coatings, to further improve its strength and stability.
Lamination and compression: Corrugated cardboard is made up of multiple layers of paper, with the fiber directions of each layer of cardboard perpendicular to each other. This laminated and compressed structure enables the cardboard to obtain a balanced strength distribution in all directions, improving the overall strength and stability. At the same time, lamination and compression can also reduce the volume of cardboard and improve its load-bearing capacity.
To sum up, Corrugated cardboard achieves the characteristics of lightness but high strength through unique structural design and selection of appropriate materials and processing methods. This makes Corrugated cardboard an ideal material for packaging, shipping and protecting items.
