1. The pH value of the waterproof adhesive must be con […]
1. The pH value of the waterproof adhesive must be controlled within the prescribed limits;
2. It must be more heavily coated than normal paste;
3. The production of cardboard as much as possible with heat energy;
4. The moisture content of the paper should not be too high.
5. More agitation must be made, and the waterproof adhesive in the tank must be used as soon as possible.
6. If the effect is still poor, the only remedy is to add a lot of resin.