What aspects should be improved to solve the problem of carton paper explosion?

The moisture content of paperboard is the key factor affecting the carton rupture line. Paper is a hydrophilic substance, which will become soft and tough when it absorbs water, and hard and brittle when it loses water. When the moisture content of cardboard is low, the influence of moisture on the carton rupture line is mainly manifested in two aspects: on the one hand, the folding resistance of paper in the plane decreases, the stiffness of cardboard increases, and the possibility of carton rupture line increases; On the other hand, the flat compression strength of the paperboard core increases, and the toughness of the in-plane paper decreases, which is easy to damage the in-plane paper during line pressing, causing the carton to burst. The experimental data show that when the moisture content of five-layer paperboard with 250g/m2 liner paper and 9000N/m blank holder is lower than 8%, the carton begins to burst. When the lining paper was changed into kraft liner paper with excellent folding resistance, the bursting resistance of the carton was obviously improved, but when the moisture content was lower than 6%, the carton began to burst. Therefore, it is very important to keep the moisture of cardboard to prevent the carton from bursting. The folding endurance of corrugated surface and liner paper itself also has an important influence on the fracture line of paperboard. Generally speaking, Niukaba is more folding-resistant than dried noodles, softwood pulp paper is more folding-resistant than hardwood pulp paper, and virgin pulp paper is more folding-resistant than recycled pulp paper. If the carton factory can reasonably select paper according to the change of weather and humidity, it can also prevent the carton from bursting to some extent. The greater the strength of corrugated paper, the greater the tension the paper bears in the process of line pressing, and the easier it is to cause the cardboard to burst. The more layers of cardboard, the easier it is to burst. For example, three-pit paperboard is easier to burst than double-pit paperboard, and double-pit paperboard is easier to burst than single-pit paperboard. The cardboard with A-notch has higher hardness than the cardboard without A-notch, so it is more likely to burst lines. Improper printing slotting operation can also cause carton line explosion. If the position of the upper and lower concave-convex rollers of the line pressing device of the printing machine is deviated, the line will be broken if the line pressing force is too large. When the weight difference between the surface paper and the inner paper of corrugated board is large, the board is easy to burst, and the greater the weight difference, the easier it is to burst. Therefore, attention should be paid to the balance of paper weight when distributing paper. Control method of paperboard bursting: keeping the moisture content of corrugated board is the best method to control paperboard bursting. It is reasonable to control the moisture content of corrugated board tile line between 12 ~ 18%, and the moisture content should be kept between 10 ~ 13% during printing.