Under the control of certain process parameters, the adhesive is coated on the surface of the original aluminum foil to form a film. The quality of the finished composite film will directly affect the heat sealing strength of the product. The more important parameters include the coating speed, the segmented temperature of the drying tunnel, the pattern shape and depth of the coating roller, the number of lines, and the position and angle of the scraper.
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.
