1. Reasonable design of carton length, width, height dimensions and proportions

A large amount of data analysis shows that the compressive strength of cartons is related to the carton perimeter, carton height and carton aspect ratio. There is a certain relationship. The longer the circumference of the carton, the higher the compressive strength. There is a certain conversion relationship between the circumference of the carton and the compressive strength.

Generally speaking, the aspect ratio of the carton is in the range of 1 to 1.8, and the impact of the aspect ratio on the compressive strength is only ±5%. Among them, when the aspect ratio RL=1.2~1.5, the compression resistance value of the carton is the highest. When the aspect ratio of the carton is 2:1, the compressive strength drops by about 20%. Therefore, the aspect ratio should not exceed 2 when designing the carton, otherwise it will cause cost waste.

2. Reasonably formulate stacking time and stacking methods

① The compressive strength of cartons decreases as the stacking time increases. This phenomenon is called fatigue. Tests have shown that under long-term load, the compressive strength of the carton will drop by 30% in just one month, and after one year, its compressive strength will be only 50% of the initial value. When designing carton materials, the safety factor of cartons that have a long circulation time should be improved.

②The stacking method of cartons also has a certain impact on the compressive strength of cartons. The pressure in the vertical pit direction of cartons is much greater than that in the horizontal pit direction. When stacking cartons, the pressure in the vertical pit direction should be maintained. Judging from the test results, the corners of the carton bear the highest pressure. The farther away from the corner, the lower the pressure. Therefore, when stacking cartons, try to keep the corners of the boxes aligned with each other.

There are three common ways of stacking cartons: brick type, up and down parallel type and windmill type. Among these three methods, up and down parallel stacking is beneficial to keeping the box corners fully compressed, so it is the most reasonable. The brick type and windmill type should be avoided as much as possible.