In the puzzle books printing manufacturer industry, I do not know whether you have found that these puzzle books printing manufacturers have a transparent film on the surface, such as high-end packaging boxes, gift packaging boxes and so on. This layer of film is called "lamination" post-press processing technology.

Laminating, also known as "superplasticizing", "laminating", etc., refers to the use of transparent plastic film for hot pressing protection of printed matter to increase the gloss of printed matter. Mulch film can be divided into "light film", "dumb film" and "tactile film".

Many packaging boxes now have a thin film on the surface. On the one hand, it can improve the product grade and the overall color expression is better. On the other hand, it can effectively prevent moisture and moisture. So why do you need to finish the color box?

In the puzzle books printing manufacturer industry, we all know that if the surface of the high-quality packaging box is not treated, the printed content of the color box is easy to scratch, fade or become dirty, and the service life is greatly shortened. If the surface is treated, such as the "coated" color box print, the plastic film is heated and the color box print is bonded together under pressure to form a paper-plastic packaging box. In this way, adding a layer of transparent film to the surface of the color box printing is not only more smooth and bright, but also has the functions of moisture-proof, waterproof, anti-fouling, wear-resistant, and so on, which extends the service life of the color box printing.

In addition to the coating treatment, the surface of the color box can also be "over-oil" treatment, which can prevent scratches, prevent fading, prevent dirty, and prolong the service life of the color box printing.

This effect is mainly in the process of coated box paper printing, many manufacturers often appear bubbles and non-bright phenomenon in the production reaction, mainly because there are problems in this link.

The laminating temperature of different substrates is different. If the laminating substrate is gold card paper, the temperature of the laminating steel roll should be controlled at 70-80℃; if the laminating substrate is covered with 250G/m2 or 300g/m2 white cardboard, the temperature should be adjusted to 80-90℃. During the placement process, the moisture absorbed by the white board is much greater than that of the gold card paper. Especially in rainy days and winter, if the temperature is not properly adjusted, the coating product will not be bright.

Different product substrate thickness is not consistent. When laminating, the pressure between the silicone roller and the steel roller should be adjusted according to the thickness of the substrate paper. If the pressure is too small, the paint film of the coating product is not strong, not bright, and easy to wrinkle: too much pressure will produce paint film wrinkles and paper deformation.

Laminate using a stretched polypropylene film. Glue must be applied to the film. The amount of glue is coated on the moving film by the driving steel roller installed in the rubber box. The control of the amount of glue is controlled by the steel knife which falls on the steel coil. Large amount of light glue: small amount of heavy glue. The amount of glue should be controlled, the glue should be firm and uniform, and crystal points should not be produced. If the amount of glue is too large, the product will not shine.

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