In recent years, paper packaging containers have been popular with consumers due to their low cost, resource saving, good mechanical processing performance, mechanized mass production, easy printing, harmless and non-toxic in use, and easy to recycle. The concept of environmental protection has promoted paper product packaging to rank first in the use of packaging materials. However, in the process of continuous development of paper packaging, people have also discovered the shortcomings of paper packaging, such as poor load-bearing capacity and easy deformation of carton packaging. In the face of these problems encountered in development, paper corner protectors have gradually emerged in paper packaging, especially in honeycomb carton packaging and corrugated carton packaging. During the entire development process, paper corner protectors have also begun to change its previous shape. There are surrounding corner protectors, bend corner protectors, U-shaped corner protectors, etc.

　　In honeycomb carton packaging, honeycomb cardboard is first used to make the box to make it a complete box, and then paper corners are used to reinforce the surroundings. The combination of paper corners and honeycomb cardboard not only strengthens the honeycomb carton The compressive performance of the honeycomb carton greatly enhances the load-bearing capacity of the honeycomb carton, and also improves the aesthetic performance of the honeycomb carton, making the appearance of the honeycomb carton more perfect. After the paper corners appear, the corrugated carton has poor load-bearing capacity and easy deformation. The shortcomings have also been significantly improved.

　　For a long period of time, the shape and use of paper corner protectors have not changed much. They are just straight strips, used as edge protectors for cartons, etc. However, as the demand for paper corner protectors continues to increase, the scope of use is also Constantly expanding, for example, from the previous development as a carton edge protector to a surrounding angle protector for barrel-shaped objects such as steel coils, U-shaped angle protectors are another deformation of paper angle protectors, and their usage is also increasing . Nowadays, U-shaped corner protectors are mainly used in the production of paper pallets. Compared with V-shaped corner protectors, U-shaped corner protectors have great advantages. The use of U-shaped corner protectors for paper pallets can increase the load-bearing capacity of paper pallets and is convenient. The processing and production of paper pallets improves the efficiency of producing paper pallets.