Adjust the ink formula: you can increase the resin content in the ink, or add some adhesion promoters.

Adjust ink formula

Treating the substrate: The substrate can be treated by surface treatment such as grinding, sandblasting and corona treatment to improve the surface roughness and adhesion of the substrate.

Processing substrate

Optimizing printing process: it can increase printing pressure and reduce printing speed, thus improving the contact area and adhesion between ink and substrate.

Optimize the printing process

Specifically, the following are some specific operation methods:

Adjust ink formula: UV ink can be added with resin, adhesion promoter and other components to improve the adhesion between ink and substrate. For example, components such as polyurethane resin, acrylic resin and epoxy resin can be added. Adhesion promoters such as coupling agents and surfactants can also be added.

Treatment of substrate: The substrate can be polished with tools such as grinder and sandpaper to improve its surface roughness. Corona treatment equipment can also be used to corona the substrate to change the surface polarity of the substrate.

Optimize the printing process: In the printing process, the printing pressure can be increased, the printing speed can be reduced, and the contact area and adhesion between the ink and the substrate can be improved.

In practical application, we can choose the appropriate ink formula and printing process according to the specific printing requirements and substrate materials to improve the adhesion of UV ink.

The following are some specific cases:

For non-absorbent substrates, corona treatment or sandblasting treatment can be used to improve the surface roughness and adhesion of the substrate.

For absorbent substrate, primer can be used to improve the adhesion between ink and substrate.

For the substrate that is easy to fall off, high adhesion resin such as polyurethane resin can be used to improve the adhesion of ink.

By taking appropriate measures, the adhesion of UV ink can be effectively improved, thus ensuring the printing effect.