Why will the paperboard be warped during the production of corrugated paper?
In principle, this is difficult to avoid, can only be minimized, through the control of raw materials, paste and temperature, etc., to reduce shrinkage or reduce shrinkage differences, so as to achieve the role of reducing warpage.
Paste contains a large amount of water, moisture in the base paper, and then drying, there will be different frequency of contraction.In this way, different layers of raw paper after drying shrinkage is different, there will be a long and short. Due to the inhibition of interlayer paste, resulting in the formation of facial or interior paper warp.
Corrugated paper is made of multilayer base paper (paper, inner paper and middle grade corrugated paper). In the process of production, the paste should be added between the layers.
