The speed of coating determines the time it takes for the coating to dry in the drying tunnel. If the coating speed is too fast and the drying tunnel temperature is too high, the solvent on the surface of the coating film will evaporate too quickly, resulting in residual solvent in the film. The coating film will not dry enough and it will be difficult to form a dry, strong and strong adhesive layer. This will inevitably lead to It affects the heat sealing strength of the product and causes adhesion between product layers.
The shape, depth, and number of lines of the coating roller as well as the position and angle of the scraper determine the thickness and evenness of the coating film. If the selection or adjustment is not appropriate, the adhesive cannot be evenly coated on the surface of the original aluminum foil, resulting in uneven film formation, the heat sealing effect of the product will not be good, and the strength will also be affected.
