The impact of static electricity on label printing and solutions

Causes of static electricity

Usually all kinds of materials have an equal number of positive and negative charges to reach an electronic balance. At the time of electrical equilibrium does not show electrical properties.

If additional electrons are added or transferred, the whole will show negative or positive charge.

So what causes static electricity in real life?

Way 1: Friction

• Electron transfer occurs when two materials come into contact and then separate.
• When materials are separated, one surface loses electrons and becomes positively charged, while the other surface gains electrons and becomes negatively charged.

Like when we take off our sweaters in winter, there is a crackling sound and even sparks, which is generated by friction.

Way 2: induction

• When an insulated or ungrounded conductive body close to the electric field, it will also be charged.

Label printing and processing static electricity generation

Theoretically there is friction where there will be static electricity:

• Putting, winding place
• Roller position
• Die-cutting waste position
• Lamination position
• Printing position
• Labeling position

In short, in the label printing process, as long as there is friction occurs, there will be a risk of static electricity. The static electricity generated is not visible, but can be measured with instruments.

The impact of static electricity on the label printing process

1. The impact of static electricity on printing

• Will adsorb paper hairs, paper dust and other foreign matter to the material surface, the formation of white spots after printing
• When static electricity is serious, sparks are generated, damaging the surface of the material, the formation of “lightning-like” defects after printing.
• Static electricity is an invisible force, resulting in ink aggregation or rejection, the formation of white spots.

2. The effect of static electricity on the die-cutting waste disposal

• Labeling and waste material together with the roll away
• Operators tend to put more pressure on the die cutter, which can easily wear out or destroy the die cutter.

3. The effect of static electricity on rewinding

• When slitting and rewinding film, static electricity can cause uneven rewinding.
• Static electricity will cause to the wrong place to increase the tension, resulting in overflow of glue.

4. The effect of static electricity on labeling

• Labels do not come out normally when labeling, but run with the backing paper
• Labels on the bottle blistering or wrinkles

5. the impact of static electricity on the quality of perforation

• After perforating the label, the label still adheres to the paper.

Static electricity elimination principle

1. Induction

• Removal or neutralization of static electricity by wire or static bars, etc.
• No need to touch the material, just keep 2-3cm.
• Make sure the grounding is good.
• Avoid touching the machine with wires or static rods.

2. Ionizing

• Releases a large number of anions and cations.
• Ionization releases a large number of anions and cations, which are neutralized by positive and negative charges.
• The ions are neutralized with positive and negative charges in direct and alternating current (AC) mode.
• In some restricted workplaces, air pressure can be applied so that the anions and cations can be transported farther away from the machine.

3. Increase the humidity of the air to a certain extent can reduce static electricity, but can not be eradicated.

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