Eight hazards of static electricity to plastic composite packaging bags
Today, Xiaobian shares with you: in the process of producing products in flexible packaging factories, static electricity is easily generated.
However, these static electricity have serious influence and harm on the production of plastic composite packaging bags, which often leads to printing failure of packaging bags and even personal danger.
So what is the harm of static electricity to flexible packaging manufacturing? The following small editor will tell you about it.
1. Static electricity generated on the printing surface of the cutting metal wire composite film will be transferred to the ink through the printing plate.
Ink contains a large number of Unsaturated Groups and particulate fillers.
Static electricity will be adsorbed on the ink particles and further absorb more particles to become larger ink particles.
Finally, due to the adsorption characteristics of static electricity, the ink particles become larger, resulting in the appearance of printing cutting lines.
Therefore, static electricity is also one of the main reasons for printing cutting lines.
2, causing Ink Spots and beards--
Static electricity on the printing substrate will be transferred to the ink through the printing plate, causing the ink to carry static electricity.
When the ink is transferred to the surface of the printed matter, normal printing cannot be realized because the ink has static electricity and the printed matter substrate has static electricity, static electricity or neutralization discharge or homosexual repulsion.
In shallow screen printing and hanging screen printing, the phenomenon of 'dropping dots' often occurs, which seems to be caused by uneven ink application and poor ink fluidity, but it is actually caused by static electricity, this is called 'electrostatic ink spot '.
In the field printing, the electrostatic ink will discharge on the edge of the printed product, and the hair-like printing defective product will appear on the edge of the field, which is called 'electrostatic ink '. 3, resulting in missing printing--
If the surface of the printed matter is electrostatic, they will absorb dust floating in the air, which hinders the transfer of ink and causes the surface of the printed matter to lack printing spots. 4. Make the winding end face irregular--
When the static electricity elimination of the film is incomplete, due to the winding characteristics of winding, when hundreds of layers or even multiple layers of film are wound together, the static electricity on the film repels each other, and the interlayer film repels each other, resulting in irregular winding.
When the horizontal parallel accuracy of the equipment is low, this is also the main reason for winding irregularity. 5, electric shock operator--
When static electricity accumulates to a certain extent, it will cause harm to the operator and is not convenient for the normal production of the operator.
6. Make flexible packaging products adhere to each other--
Static electricity can cause printing materials to adhere to each other, making it difficult to separate.
For paper printing, there will be adverse consequences, such as double-sheet paper, blank paper, irregular paper collection, overprinting, overprinting, and increased loss.
For plastic printing, there are phenomena such as sticky bags, poor openings, and dust adsorption. 7, electronic equipment damage--
Current and electromagnetic fields during electrostatic discharge affect the normal use of electronic equipment, which will cause damage to electronic equipment in serious cases.
In actual production, the tension controller and peach computer installed in winding and unwinding are easy to be damaged, and the root cause is static electricity.
8. A large amount of static electricity generated by the winding causes fire--
Winding is a multi-layer winding structure. The electrostatic field energy accumulated in each layer is not large, and the electrostatic field in each layer may be only a few hundred volts.
However, when hundreds of layers or even multiple layers of films are wound together, the voltage and energy of the electrostatic power plant are very large. In serious cases, the voltage reaches more than 20 kV and reaches more than 100 kV. The winding is close to the final color printing unit.
When high voltage static electricity releases solvent-based ink, it is easy to cause fire.
Many fires prove that the static electricity collected is the most important cause of the fire.