Dry laminating machine process, that is, the glue in the solvent solvent by heating the exhaust method to make it fully dry, and then in the dry conditions laminated. The demand for dry laminators is higher considering the opportunity to laminate different plastic films, aluminum foils and even paper.
The amount of adhesive forward, the amount of adhesive too little or the surface of the coated substrate is not coated with some adhesive, which will lead to complications when the two substrates are difficult to laminate. We can use deep holes of anilox rollers or reduce the contact pressure by increasing the pressure of rubber and rubber rollers and anilox rollers to increase the amount of adhesive on the surface of the substrate.
For some plastic film substrates, this can be applied prior to corona treatment to make the surface fluffy HP and then increase the amount of adhesive on the surface by absorbing the adhesive into the forward substrate.
Choose the proper drying temperature; too high or too low can affect the bonding fastness of the laminated film. When the substrate temperature is too high or after high temperature cooking, the surface of the adhesive will carbonize and then damage the adhesive's bonding ability. When the temperature of the monomer is too low, the adhesive curing is not complete, the adhesive bonding is poor, the composite material is not strong, and after a period of time, the composite film is easy to form bubbles, which damages the quality of the composite product.
Of course, we can choose excellent resistance to high temperature and heat resistance of digital printing machine for higher temperature drying, such as the choice of polyurethane adhesives. Dry laminating machine to properly increase the composite pressure is too large or uneven pressure at both ends of the composite rollers, will cause the surface of the composite film wrinkled, composite folding after the formation of cavities, affecting the bonding fastness products.