What factors will affect the laminating of the pre-coating laminating machine? There are three main factors: temperature, pressure and speed. I will share with you in detail below.
        The first factor that should be paid attention to in the laminating of the pre-coating laminating machine: temperature
        Temperature is the first hub of laminating. The adhesive used for pre-coating is hot-melt adhesive. Temperature determines the melting state of hot-melt adhesive, determines the leveling function of hot-melt adhesive, and determines the direction of hot-melt adhesive molecules to BOPP. The diffusivity between three molecules of the film, printing ink layer, paper substrate and other substances also determines the crystallinity of the hot melt adhesive. Only by accurately controlling the temperature of the working area can the solid hot melt of the pre-coated film on the film be made The adhesive layer is completely melted into a viscous state, with suitable activity to achieve wetting and bonding to the surface of the printed matter, and at the same time to ensure immediate solidification after compounding, so that the laminated film product has a smooth appearance, bright enough, and the adhesive layer has a good degree of melting, no Crease. And can peel the ink.
        The temperature control of the laminating process also affects and determines the hot-melt adhesive used for laminating to solve the changes when heated, as well as the resistance to the new heat. Therefore, strict temperature control is the primary hub for precoating of precoating and precoating machines.
        The second major factor that should be paid attention to in the laminating of the pre-coating laminating machine: pressure
        While accurately controlling the laminating temperature, appropriate pressure should also be used. Because the surface of the paper itself is not very smooth, only under the pressure can the hot melt adhesive in the state of viscous flow be fully removed from the air on the surface of the printed matter. Wetting the surface of paper prints.
        Produce colloid molecules to the ink layer of paper printed matter, paper molecules diffusion, misalignment, achieve good adhesion, and form a complete coverage of the entire surface of the printed matter, so that the printed matter is bright, no fog, leveling of the glue layer, no folding Marks, good bonding effect, and without wrinkling, appropriate increase in pressure can make the thermoplastic curing performance of the hot melt adhesive fully manifest, to ensure that the laminating product is added to the process after compounding A variety of physical peeling, impact forces, etc. have a strong resistance to achieve the same speed of the internal structure and surface state of the composite printed matter.
        Paper lamination is a dynamic compound motion. The speed of the paper determines the time the paper-plastic composite stays on the thermocompression bonding interface, and also determines the input temperature, pressure, and temperature of the lamination machine. The actual action value of the paper-plastic composite during the actual production process.
        The third factor that should be paid attention to in the pre-coating laminating machine: speed
        When the two factors of lamination temperature and pressure are fixed, the change of speed will change the lamination effect, and because of the upper limit of temperature and the limitation of pressure supply, it will only change from the direction less than the set value, and will vary with the speed. Speeding up, the drop rate is significant, the heat and pressure force declines, and the composite effect deteriorates. The running speed is too fast, the bonding is not strong, there will be fog, and if it is too slow, it will be inefficient, and even bubbling. Therefore, the compound running speed determines the time for the pre-coated film and paper print to achieve bonding.
        The actual action value of the three factors of temperature, pressure and speed has a certain range. Because of the different equipment, we need to find the best effect value in practice to ensure the composite effect of the pre-coating film and create a favorable premise for the spine of the cover of the next step of the glue nail cover not to leave the shell and not foam.