The laminating machine can be divided into two major categories, namely glueless laminating machine and pre-coating laminating machine. It is a kind of special equipment for paper, board and film laminating. It is combined with rubber roller and heating roller to form a product of paper and plastic.
        The pre-coating laminating machine adopts the form of glue coating, such as using solvent volatile glue, water-based glue or hot-melt adhesive to pre-coat on the laminating material for hot pressing, while the glueless laminating machine is different from the pre-coating type Laminating machine, glue-free coating does not use conventional biaxially oriented polypropylene film (OPP), but PE film with high pressure polyethylene as the main material, PE film has better hot melt and plasticity, PE film After a special strong treatment on one side, the PE film can be hot melt compounded on the color printing paper with a glueless laminating machine. This non-adhesive coating can withstand temperatures ranging from 20 to 120 ° C. PE film is a material with a weak van der Waals force. The waxy additive composition makes its surface appear to be a weak interface layer.
        Therefore, in the hot melt state at a lower temperature, its adhesion to paper is also smaller, so in the process of non-adhesive film, a layer of auxiliary material needs to be placed between the heating roller and the PE film (for One side surface of the PE film was specially treated with strong force), and then passed through the non-adhesive film laminating machine, and then the film product was removed from the auxiliary material. In addition, there is also a glue-free laminating process for the glue-free composite film, which can be directly compounded with paper without glue at a certain temperature and pressure, mainly used for self-adhesive label lamination.