Corrugated Board Strength - Impact of Machine Equipment

The influence of machine equipment (single-sided machine, coating machine) on the strength of corrugated board

1. The relationship between single-sided machine and corrugated board strength

The quality of corrugated board produced by single-sided machine has a great influence on the strength of corrugated board. The quality of single-sided machine is mainly reflected in the hardness, flatness, adhesive strength and corrugating forming effect of board. The production process shows that the strength of corrugated paperboard, and the quality of linerboard and corrugated paper are certainly influential factors, but if the production process is not properly controlled, even the best paper quality cannot produce high-strength corrugated cardboard.

If the speed of the single-sided machine is too fast or too slow, it will affect the hardness and adhesive strength of the cardboard. Especially when the moisture of the base paper is high, if the production speed of the machine is too fast, the warm-up time is short, and the time for “eating glue” on the corrugated peak is short, so that the binding effect and forming hardness of the cardboard are reduced. If the speed of the machine is too slow, the heating time of the board is relatively long, the board will easily become brittle, and the overheated temperature will cause premature curing of the adhesive, affecting the adhesive effect, all of which will reduce the strength of the board. Therefore, the production speed of the machine should be based on the situation of the moisture content of the base paper, the preheating area and the temperature, comprehensive consideration, and reasonable control, in order to ensure the quality of corrugated board production. According to the experience of the production process, the machine speed can be mastered by referring to the following table:

2. The relationship between the coating machine and the strength of corrugated board

The structural design of the gluing machine directly affects the strength of the corrugated board. Generally, the squeegee roller and the metering roller must have sufficient wall thickness to ensure that the roller will not bend due to the rigidity and thickness of the squeegee roller under high speed operation and hydraulic conditions. The ration rolls should be kept parallel to each other and in parallel with the corrugating roll; there is a wide range of raw paper moisture preheating and steam shower devices, and the production equipment has excellent adjustment ability. The reason analysis and solution are shown in Table 2.

(to be continued)