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First, the larger the printing area, the lower the box's resistance to stress. Secondly, when the printing area is equal, foreign packaging researchers researched (see Figure 3): when printing for the first shape, the empty box can withstand the pressure drop of 28 to 36%; When the two shapes are printed, the pressure resistance of the empty box of the carton can be reduced by 12 to 25%; when printing for the third shape, the pressure resistance of the empty box of the carton can be reduced by about 5%. Especially in the case of full-scale printing and circular belt-shaped printing in the first case, the impact is most pronounced.
The reason for this is that the printing pressure causes the corrugations of the carton to be deformed, thereby reducing the pressure bearing capacity of the corrugated carton. And the larger the printing area is, the greater the damaged area is, the worse the pressure bearing capacity is, resulting in the reduction of the pressure resistance of the carton empty box.
However, with the continuous improvement of printing equipment and printing technology in the carton industry. The degree of influence in this area has been greatly reduced. (image 3) 
In our daily life, we often see home appliances cartons and food cartons. These cartons have hand holes and vents on the wall. What effect does the presence of these holes have on the pressure resistance of the carton's empty box? Studies have shown that the transverse hand hole has a greater effect on the carton's resistance to pressure than the longitudinal hand hole. The hand hole should be as small as possible, as close as possible to the center of the carton so that the impact can be minimized.
What has been mentioned above is the impact of the box design on the pressure resistance of the empty carton box, in addition to the carton forming process, which is related to the manufacturer's equipment. Workers technology. It mainly includes: chamfer slotting of cartons, binding and binding of cartons.
In summary, it can be seen that there are many factors that affect the carton's resistance to pressure. In order to increase the strength, we should focus on comprehensive evaluation in order to achieve the best results with lower costs. Of course, the direction of development in the future is to use computer-aided design. In the computer, elements such as design ideas and printing requirements are input as input, and then the best empty box compression effect is sought. (Text / Zhang Xiaorong Jiang Wei)
Corrugated box anti-stress test research continued
Today's cartons have evolved from the original transport packaging to sales packaging, and users have increasingly higher requirements for the printing of cartons. Unreasonable printing will cause the carton to reduce its pressure resistance by about 40%. (The printing here refers to cardboard printing)