How to prevent the collapse of open cartons
In the production process of carton packing factory, there will be a headache, that is, aiming at the problem of carton collapse and sticky carton, the paper summarizes how to select the material of cardboard, improve the compressive strength and moisture-proof function of carton, and reduce the collapse rate of carton.
Carton collapse problems mainly pay attention to the following points:
1. Choose good base paper
Check the glue situation of corrugated paper, if the surface sizing is poor, the water absorption will be higher, encounter the wet environmental impact, resulting in corrugated box moisture, softening, tidy up compressive strength decline.
2. Control the moisture content of cardboard when producing cardboard
The moisture content of the selected cardboard should not be too much. Because of the high moisture content, the hardness of the cardboard is low, which affects the edge pressure index of the cardboard. When cardboard is produced, the glue content of single-sided machine and double-sided machine should not be too large. Once the amount of glue is large, the corrugated shape of the cardboard will be deformed, and the corrugated shape directly affects the edge pressure of the cardboard, and the edge pressure decreases, so does the compressive strength of the carton.
3. The bonding strength of cardboard should be high.
The bonding strength is the bonding strength of corrugated paper with lining paper and facing paper. If the cardboard false sticking occurs, after the carton is pressed, the surface and pit lines of the carton in production will be separated, and the compressive strength of the carton will be reduced in a straight line.
4. It can also deal with the problem of waterproof and moisture-proof on the outside of cartons by using waterproof varnish.