What are the ways to reduce the stain on the aluminized composite film?

1. The hiding power of white ink and yellow ink is poor. The printing layer ink is infiltrated by ethyl acetate in the adhesive, and some of it is dissolved, especially white ink. The color material is TiO2 particles, and its particle size is larger, and There is a weak link between the binders, which is more easily infiltrated by ethyl acetate. On the one hand, it causes difficulty in drying. On the other hand, the results of different infiltration results are different after the composite, resulting in spots;

2, the coating hardness of the aluminized film itself is not uniform, the adhesion force of the ink and the adhesive on the surface is different, the adhesion between the ink and the coating is low, the difference between the layers is formed, and the density is high without spots. The coating has been obviously transferred, and the reflection is formed by the reflection of the aluminum plating layer;

3, the adhesive is also an important factor, when the surface tension of the adhesive is high, the effect of infiltration and spreading on the aluminized film is poor, the adhesive coating state is not good, some adhesives with high initial adhesion, poor solvent release, high residual solvent, Spots are generated when the ink layer is wetted by residual solvent.

Measures to reduce the spot of aluminized composite film:

1, improve the thickness of the ink layer on the printing, improve the hiding power;

2, in the aspect of adhesive, the special aluminum-plated composite adhesive is used, the flattening property of the aluminum-plated adhesive is good, and the solvent release property is good;

3, when the glue is added, the amount of curing is increased, and the amount of glue is increased;

4, in the composite process to strictly control the composite speed, increase the amount of exhaust air, can play a good effect;

5, also pay attention to the maintenance of the equipment, the rubber roller, flattening roller, scraper, etc. should be thoroughly cleaned.