Calculate the compressive strength of the carton according to the raw material
After the compressive strength of the carton is determined, the appropriate cardboard and corrugated board should be selected to produce corrugated cartons to avoid waste during production; there are many formulas for calculating the compressive strength of cartons based on the ring compressive strength of base paper, but they are more concise and practical.
Corrugated box compressive strength
The best way is to test the carton with a carton compression testing machine after constant temperature and humidity treatment; for small and medium-sized factories without testing equipment, you can place a wooden board on the carton, and then stack the same amount of heavy objects on the wooden board, Roughly determine the compressive strength of the carton. Whether the compressive strength meets the requirements.
Factors Affecting the Compressive Strength of Cartons
1. Raw material quality
The base paper is the decisive factor that can determine the compressive strength of the carton. However, the influence of other conditions in the production process of corrugated board cannot be ignored, such as the amount of adhesive, the change of groove height, impregnation, coating, composite processing, etc.
2. Moisture
Corrugated boxes are made of corrugated cardboard with excessive moisture content, or stored in a humid environment for a long time, which will reduce its compressive strength. Fiber is a super absorbent fiber. In the rainy season and when the air humidity is high, the moisture balance relationship between the moisture in the cardboard and the atmospheric environment is very important.
3. Box
The box shape refers to the size ratio of the box type and the box shape of the same type that have a significant impact on the compressive strength. Some cartons are made of double-layer corrugated cardboard, and their compressive strength is significantly higher than that of single-layer cartons of the same specification; under the same conditions, the higher the box body, the worse the stability and the lower the compressive strength.
4. Printing and perforation
Printing will reduce the compressive strength of the carton. For products with ventilation requirements, opening holes on the box surface or making handle holes on the side of the box will reduce the strength of the carton, especially if the opening area is large and biased to one side, the impact will be more obvious.
5. Process deviation
During the box making process, improper crimping, too deep grooves, and weak combinations will also reduce the compressive strength of the box.
