How to clean the anti-static brush
Chemical elimination method
Apply an antistatic agent to the surface of the substrate to make the substrate conductive and become a slightly conductive insulator. The application of chemical elimination is very limited in practice. For example, when chemical components are added to printed paper, the quality of the paper is adversely affected, such as reducing the strength, adhesion, tightness, and tensile strength of the paper. Therefore, the chemical method is not Too widely used.
2. Physical elimination method
It is the most common method available to eliminate the properties of the material by using the characteristics of static electricity itself.
(1) The grounding elimination method uses a metal conductor to connect the substance to be electrostatically removed to the ground and to the same potential as the earth, but this method has no effect on the insulator.
(2) Humidity control elimination method
The surface resistance of the printed material decreases as the humidity of the air increases, so increasing the relative humidity of the air can increase the conductivity of the surface of the paper. The suitable environmental conditions for the printing workshop are: the temperature is about 20 degrees, and the ambient humidity of the charged body is more than 70%.
(3) Principle of selection of static elimination equipment (title picture is printed static eliminator)
The static elimination equipment commonly used in printing plants is inductive, high-voltage corona discharge, ion current static eliminator and radioisotope. Among them, the first two are cheap, easy to install and use, and no atomic radiation is widely used:
Inductive static eliminator bar: Inductive static elimination brush, the principle is that when the tip of the consumer is close to the charged body, the polarity is opposite to the electrostatic polarity on the charged body, thereby neutralizing the static electricity. High-voltage discharge static eliminator: divided into electronic and high-voltage transformer type, divided into unipolar and bipolar according to discharge polarity, unipolar static eliminator only acts on one kind of charge, bipolar can eliminate any A charge. In the printing process, static electricity brush and high-pressure discharge can be used to eliminate static electricity. The principle of the installation position of the static eliminator: easy to operate, next to the subsequent part of the solvent.
3. Measures to prevent static electricity
Where there is static electricity
Hazardous process equipment and places must be in areas where explosive gas may be present, and ventilation measures should be strengthened to keep the concentration below the explosion range; when the electrostatic insulator is used to cause electric shock to the operator, the electrostatic potential of the insulator is controlled below 10KV. In areas where there is a risk of explosion and fire, operators must wear anti-static shoes and anti-static overalls. Conductive ground is laid in the operation area. The resistance of the conductive floor to ground is less than 10 ohms, and the conductive performance is maintained. It is strictly forbidden for the operator to wear synthetic fiber clothes (except clothes that have been regularly treated with antistatic solution) to enter the above area. Undress.