Some questions about printed materials (9)

What is corrugated cardboard?
Corrugated cardboard is a plate made of cardboard and corrugated paper processed into corrugated rollers by corrugating rollers. It is a lightweight, strong, low-cost packaging board. Corrugated cardboard is divided into single corrugated cardboard and double corrugated cardboard. Single corrugated cardboard is processed from two layers of cardboard and a layer of corrugated paper; double corrugated cardboard is composed of two layers of cardboard, two layers of corrugated paper and a sandwich core. Processed. Corrugated paper has different types of 楞 (U-shape, V-shape), 楞 (300mm), and 楞 height. Corrugated paperboard is made by first pressing the corrugated paper on pressed paper into a corrugated shape, and then bonding the surface from both sides with an adhesive (starch or other binder, but not using sodium silicate). As a result, the middle of the cardboard is hollow. When pressed by an external force, it does not produce a very concentrated stress. Therefore, corrugated paperboard has high strength, including stiffness, hardness, pressure resistance, resistance to breakage and other properties are better than the general cardboard, corrugated box made of it, but also conducive to the protection of the packaged goods. Corrugated cardboard is divided into U-shaped and V-shaped according to the shape of the corrugated medium. U-type (commonly known as semi-circular type) is flexible, good cushioning performance, strong pressure resistance, more glue consumption when glue, and more core paper, easy to bond. The V-type (commonly known as inverted eight-character) corrugated buffer is poor, pressure resistance is greater, the use of adhesive less, with less core paper, not easy to bond. According to different sizes, corrugated cardboard is divided into A, B, C, D, E five kinds of performance comparison list 57. Table 57 Comparison of properties of corrugated cardboard