Electrostatic impacts greatly on the printing, it has been am important issures on how to eliminate static electricity generated in the printing industry.

Three major performances on elctrostatic problem:

1, beard - ink flying out of the printed pattern or the edge of the text, like a beard;

2, the markings in the field printing part - often appear in the version of the depth of 5-20μm, which is the reason that the ink on the printed film has been affected by the static and disdplace before desciccating.

3, edge exclusion - gravure printing overprint occurs. The first color ink and the second color ink can not be a good fit, resulting in rejection, which form a white side between the two colors.

The main source of static electricity

First of all, BOPP film itself has a lot of static electricity, in this case, you can use a different manufacturers of film or eliminate static treatment, and then use.

Second, the reason causing static electricity in the printing process mainly are in the following areas:

1, in high-speed printing, BOPP film with rubber pressure roller between the long-term friction, resulting in a lot of static electricity;

2, the climate is dry, humidity is too low;

3, the characteristics of the ink itself or its lack of anti-static capacity, resulting in static electricity;

4, the device's anti-static device has been ineffective, can not play the role of eliminating static electricity.

Solution on electrostatic failure

1, regularly check whether the anti-static device can play the role of anti-static;

2, in the season of dry climate, make sure that the printing environment maintaining a certain degree of humidity;

3, as far as possible the use of non-static printed film, or printed film for static elimination;

4, in the diluted solvent, add a polar solvent, such as butanone, isopropyl alcohol, ethanol, less ethyl. In the BOPP film printing process, you can add 5% -20% of the isopropyl alcohol in the ink to eliminate the printing process of static electricity;

5, in addition, you can add ultra-concentrated static agent or anti-static to solve the "beard-like" static in the acutal printing process; and for "edge of the exclusion" problem, you can increase the printing ink viscosity or additives to solve;

In the design of ink formulations, we also give full consideration to the ability of the ink to eliminate static electricity, you can add 2% -8% in the formulation of acetone, while adding 0.1% -0.5% AE-2 super concentrated antistatic agent or 0.5% -2% antistatic agent to solve (but pay attention to the use of control).