Prepress processing for heat shrinkable film label

In theory, in order to obtain good printability on the plastic film, the surface tension of the film should be higher than the surface tension of the ink.

In the plastic film, such as PP, PE film is non-polar polymer materials, chemical stability, surface tension is small, lower than the tension of the ink, ink adhesion ability is poor. Although some film surface tension and the tension of the ink was even higher, but its surface is smooth, nonporous surface adsorption capacity is small, and add a variety of synthetic resin film in the opening agent, antistatic agent, anti-aging agent can also affect the surface properties of the films, the printing adaptability becomes poor, so in order to improve the film surface printability, printing on film surface must be the poor performance of pretreatment, improve the surface tension and surface adsorption capacity. Heat shrinkable film label