The 5 Ways of Removing Paper Static Electricity in Printing Process

1, inventory method paper into the printing plant storage, the storage time should be appropriate longer, the storage location can be better connected with the printing shop, with a temperature of 18 ~ 25 °C, relative humidity of 60% to 70% is the best. The consistency of the temperature and humidity of the printing shop with the paper bank will help change the moisture content of the paper. Changing the moisture content of paper is a process of releasing static electricity.

2, hanging paper method (wetting method)

The main method is to eliminate static electricity by adjusting the main humidity. When the relative humidity in the workshop is less than 50%, high static electricity is easily generated during the printing or Plate making process, and the relative humidity of the shop and the moisture content of the paper are increased. Especially, increasing the indoor relative humidity when paper is being dried is very effective for eliminating static electricity. The humidity control equipment can be used to increase the relative humidity in the room. When there is no humidity control equipment, sufficient water can be sprinkled on the floor. The humidity control equipment is mainly a humidifier, and a centrifugal automatic humidifier can be installed on the ceiling or wall of the workshop. When the relative humidity in the room does not meet the requirements, the humidifier can automatically spray misty water vapor, increase the indoor relative humidity, and automatically stop spraying when the relative humidity in the room reaches the required level.

3, static eliminator method

The ions generated by the static eliminator neutralize the charge on the electrified body to eliminate static electricity. There are three types of static eliminators: one is an applied-voltage static eliminator, which applies a high voltage to acicular or thin wire electrodes to generate ions due to corona discharge. The transistor static eliminators used in printing machines are generally classified as such. Second, the self-discharge type static eliminator, the conductive fiber, conductive rubber or conductive metal materials such as needle-like or thin wire electrode and well grounded, use the electric field of the charged body to generate corona discharge ion, And the charge on the electrified body; Third, the static elimination of radioactive elements, the use of ionization of radioactive isotopes, ionized air ions, and static electricity on the charged body.

4, antistatic agent method

Antistatic agent is also called static elimination agent or deoxidizer. The principle is to give hygroscopic ions on the surfaces of charged objects such as paper and film to make them hydrophilic, absorb moisture in the air, reduce resistance, increase electrical conductivity, and make static charges less likely to accumulate. Antistatic agents are mainly surfactants, with hydrophilic and hydrophobic groups, or polar groups and non-polar groups. Hydrophilic groups have strong affinity for substances such as water, which are more polar, and hydrophobic groups have strong affinity for oils and Other less polar objects. Antistatic agents are widely used in printing, such as the use of antistatic agents to produce anti-static soft roller and so on.

5, process operation method

During the printing process, a damp towel may be added to the delivery section to hold the dipped towel on the pull rod so that the paper is contacted with a damp towel to eliminate static electricity. This is a temporary but effective way to eliminate static electricity. The disadvantage is that Frequent wet towels.