Electrostatic fault in silk screen printing

Electrostatic current is generally very small, the potential difference is very large, and there may be a phenomenon of attraction, repulsion, conduction, and discharge.

1 adverse effects on screen printing. In the screen during printing, the rubber portion and the screen are charged by the pressure scraping of the blade rubber. If the screen itself is charged, it will affect the normal inking and produce blockage failures; it will be absorbed by the screen at the moment when the substrate is output.

a. The glass is easily charged when the heating wire is printed.

b. Electrostatics tend to attract ink particles on the glass surface, making the glass surface unclean.

c. The human body's electric shock due to static electricity is caused by contact with a charged object, or by the generation of spark discharge before the accumulation of static electricity at the ground. 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 How to prevent static electricity. The methods for preventing static electricity generation include: adjusting the ambient temperature and increasing the air humidity; the appropriate temperature is generally about 20° C. and the relative humidity is about 60%; static electricity can be transferred in the wet air; the net pitch is reduced, and the printing speed is reduced.