To solve the problem of color box printing film, the falling paper receiving and gluing machine should control the use of base paper, check the sizing of corrugated paper, and the water absorption index of base paper surface. If the surface sizing of the base paper is poor, the water absorption will be on the high side. It is easy to be affected by the cold and humid environment of the hand cold storage, which will cause the carton to regain moisture, become soft, and reduce the finishing compressive strength.
The moisture content of the paperboard should be controlled during the production of the paperboard. The moisture content of the paperboard should not be too much, because the greater the moisture, the lower the hardness of the paperboard, and affect the edge pressure index of the paperboard. In the process of cardboard processing, the amount of glue on the single side machine and the double side machine shall not be too large. Once the amount of glue is large, the corrugated shape of the paperboard will deform, and the corrugated shape will directly affect the edge pressure of the paperboard. When the edge pressure decreases, the compressive strength of the carton will also decrease.
The adhesive strength of paperboard should be large. The adhesive strength is the adhesive strength of corrugated paper, lining paper and face paper. In case of false adhesion of cardboard, the top paper or lining paper will be separated from the corrugated paper after the carton is pressed, and the compressive strength of the carton will decline linearly.
The gap pressure control in the production process should be moderate, especially the gap pressure on the pasting machine should not be too small, and the gap pressure of the sun wheel on the double-sided machine and die-cutting machine should be controlled within a reasonable range to avoid crushing the corrugated and affecting the compressive strength of the cardboard box.
Use water splashing agent, waterproof varnish, etc. to solve the waterproof and moisture-proof problem of the carton surface.