Professional BOPP anti-scratch thermal roll laminating film supplier from China

Due to the limitations of technology, production equipment and raw materials, there are still quality defects in the pre-coated films produced by domestic equipment (most of them are hot melt adhesive type). Since the production process is similar to that of coated film, the adhesive is dissolved with organic solvent and rolled onto the substrate film with concave anilox rollers, so there is insufficient solvent evaporation, odor when operating and using, and the surface is easy to blister after the solvent evaporates after the film is coated. At the same time, due to the hot melt adhesive by several polymer materials blended, the use of the process, temperature control will cause degradation and cross-linking of polymers within the hot melt adhesive, so that the surface of the film is not good. Some pre-coated film colloid easy to bond with the outer surface of the substrate, resulting in poor roll-up. Due to the thin layer of adhesive, and the surface is not activated by the treatment, it is easy to produce a lack of adhesion to the printed matter and other defects. As the hot melt adhesive is mixed by several materials, the transparency of the laminated film is significantly worse than that of the low temperature pure resin-based pre-coated film.