Since entering China in 2000, the pre-coating film lamination process (Thermal lamination) has undergone nearly 10 years of practical verification. Compared with the traditional coating film process, it has the following obvious advantages:
1. Environmental protection
Compared with the solvent-based coating film process, the pre-coating film coating process does not contain any volatile harmful substances, so there is no potential harm to the operator, no pollution to the workshop environment and hidden fire hazards. Therefore, the United States has achieved 100% application of pre-coated films, the utilization rate in Europe has reached more than 90%, and Japan and South Korea have 70%. In addition, the pre-coated film-coated printed matter is easy to recycle, and paper and film separation can be easily achieved, while the ready-coated film-coated printed matter is difficult to recycle.
2. Easy operation
Before the production of pre-coated film, there is no need to prepare glue like the instant coating process, there is no need to adjust the amount of glue during the production process, there is no need to dry the adhesive, and there is no need to clean after the work, which greatly shortens Work assist time. Therefore, for different pre-coating equipments, up to 2 or 3 operators can be deployed per shift, which reduces the company's human resource costs.
3. Reliable quality
The structure of the pre-coated film is based on BOPP, and EVA hot-melt adhesive is evenly sprayed on it. Compared with the instant coating glue, the advantages of hot melt adhesives are:
1. It has good leveling property in the molten state;
2. The ability of glue molecules to diffuse into the ink and paper is strong;
3. Strong powder melting ability;
Therefore, the pre-coated film-covered printed matter not only has high color reduction and strong adhesion, but also does not need to be de-powdered before compounding, which effectively prevents the printed matter from blistering or peeling off after die-cutting, indentation phenomenon.
4. Energy saving
From the point of view of the total power of the equipment, since there is no need for drying, the domestic automatic pre-coating film laminating machine is generally in the range of 15-20 kW, and the semi-automatic pre-coating film laminating machine is basically between 5-10 kW. The power of the fully automatic coating machine is between 50-75 kW, and the power of the traditional bridge-type semi-automatic laminating machine is as high as 25 kW. Therefore, the power consumption of the pre-coating equipment is at most 1 / 3-1 / 2 of the water-based coating equipment. In addition, the pre-coated film laminating equipment has a compact structure and a small footprint, saving site costs.
5. Flexible processing technology
Because the pre-coated film is firmly bonded to the printed matter, it can still be used for glazing, hot stamping, screen printing, frosting and other processes after the film is coated.
Six, more suitable for gold, silver and other spot color prints
The pre-coated film is not only suitable for the coating process of dark solid prints, but also because the hot melt adhesive will not react with gold, silver cardboard and copper, aluminum and other components contained in gold and silver ink, For printed products, the pre-coating film coating process has unparalleled advantages of the instant coating film process.
Pre roll cones. Preroll ,Pre roll
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