Start from the root to reduce the sticky box failure (3)

Insufficient cardboard strength

If the adhesive fails, 100% of the paper fiber's breaking energy proves not to be an adhesive's quality problem, but cracking of the splice at the board surface due to insufficient strength cannot be excluded. The low strength of the board surface is due to the high content of recycled materials used to produce the paper, and the fact that the board surface is not wet processed. If the fiber strength of the cardboard surface is not enough, the fiber can be easily pulled out when the splicing seam is pressed, which directly results in the adhesive not being able to exert its best effect, resulting in ineffective adhesion.