How to solve the static electricity problem during BOPP color synthetic paper printing?

BOPP color synthetic paper may encounter static electricity problems during the printing process, which can affect printing quality and efficiency. Here are some effective solutions:

1、 Application of static elimination equipment

Static eliminator

Types: including induction type, DC discharge type, AC discharge type, etc.

Working principle: By generating ions of opposite polarity to charged objects, the static charge on the surface of the object is neutralized.

Application scenarios: BOPP production lines, film roll slitting equipment, cigarette packaging machines, etc. can all use static eliminators to eliminate static electricity.

Other static elimination devices

Like an air ionization device, it can be installed near the surface of the substrate before and after printing, neutralizing the surface charge of the substrate through high-voltage spark free discharge.

2、 Adjust printing process

Control printing speed

Reducing the printing speed can reduce the friction between BOPP color synthetic paper and printing equipment, thereby reducing the generation of static electricity.

Optimize ink formula

Adding an appropriate amount of polar solvents such as methyl ethyl ketone and isopropanol to ink can improve its conductivity and help eliminate static electricity.

At the same time, it is also possible to consider adding anti-static agents to the ink to enhance its anti-static ability.

3、 Improve environmental conditions

Increase air humidity

The generation of static electricity is closely related to air humidity. When the air humidity is low, static electricity problems are more likely to occur.

Therefore, tools such as humidifiers or wet wipes can be used in the printing workshop to increase air humidity and reduce static electricity generation.

Control workshop temperature

Excessive workshop temperature may also exacerbate static electricity problems. Therefore, it is necessary to control the temperature of the printing workshop reasonably, and it is generally recommended to be around 20 ℃.

4、 Material selection and processing

Choose anti-static film

When possible, choosing BOPP colored synthetic paper with anti-static properties can reduce the occurrence of static electricity problems from the source.

Thin film pretreatment

Pre treatment of BOPP colored synthetic paper before printing, such as coating or soaking with anti-static agents, can effectively reduce the generation of static electricity.

5、 Grounding and shielding

Grounding treatment

Connect the metal parts of the printing equipment to the ground, and introduce static charges into the ground through grounding to eliminate static electricity.

However, it should be noted that grounding has almost no effect on insulators, so it is necessary to ensure that the material has conductivity when using it.

Shielding measures

Setting a shielding layer around the printing equipment can reduce the impact of external electric fields on the printing process, thereby reducing the generation of static electricity.

In summary, solving the static electricity problem in BOPP color synthetic paper printing requires multiple approaches, including the use of static elimination equipment, adjustment of printing processes, improvement of environmental conditions, material selection and handling, as well as grounding and shielding. The comprehensive application of these measures can effectively reduce the generation of static electricity problems, improve printing quality and efficiency.