In this passage, we will discuss how to avoid static fault of printing mesh.
Electrostatic current in printing mesh is generally very small, the potential difference is very large, and there may be the phenomenon of attraction, repulsion, conduction, and discharge. These phenomena will lead to deterioration of the product, degraded performance, fire, fire and human body and other adverse consequences.
1. adverse effects on screen printing. In the screen during printing, the rubber portion and the screen are charged by the pressurization of the squeegee rubber. The screen itself is electrified, which will affect the normal inking, resulting in blockage failure: it will be absorbed by the screen at the moment when the substrate is output.
a. Synthetic resin inks are easily charged.
b. Substrate is water-absorbent even though it is papery, but static electricity can also be generated when the air is dry. Plastic substrates have good insulation properties, are not affected by temperature, and are prone to static electricity.
c. The printing area is large and the charging is also large, which is easy to produce bad effects.
d. Since spark discharge can cause flames, be very careful when using flammable solvents.
e. Electrocution due to static electricity is caused by contact with a charged object, or by electrostatic discharges that generate spark discharges when grounded. Although the electric current generated by electric shock is small, no danger will occur, but electric shocks often occur, which will have an adverse effect on the operator's psychology.
2. Prevent static electricity. The methods for preventing the generation of static electricity include: adjusting the ambient temperature, increasing the air humidity, the appropriate temperature is generally about 20oC, the relative temperature is about 60%; a small amount of antistatic agent is put into the alcohol used for cleaning the printing materials; the frictional pressure and the speed are reduced; It may reduce the friction, pressure and impact of the substrate; install general grounding devices; use ionization of flames, infrared rays, and ultraviolet rays; ionization of corona discharges using high-voltage currents.
Hope this passage will be helpful for you when using printing mesh.
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