• Static elimination

Static elimination

Causes for static charge, examples, methods to solve the static electricity and practical solutions and products are presented.

Static electricity or a static charge can be troublesome in many production processes where non-conductive materials such as plastic, paper, wood and textile are processed.  This page presents you with solutions on how to know that you have a problem with static electricity. A number of example situations that can hold static electricity are presented graphically and the most common places where static can occur and can give problems are identified. There used methods to eliminate static electricity and also the causes of the buildup of static electricity or charge are important factors that need to be understand.

 

Solutions to the most common problems related to static electricity are presented and linked to products that you can use in a production environment.

 

How do you know if in your situation static electricity plays a role?

 

Most common problems are easy to recognise:

 

Spark in the machine.

A spark is a good indicator of a charge building up in a machine, sometimes this can be linked to static-electricity.

 

People get shocks

It is a problem when operators and material handlers get shocks from the machine or from the roll of foil or sheets in the machine. Sometimes this can be dangerous

 

Materials cling together and are difficult to process

Static electricity is one of the causes that makes it difficult for machines to run at high speeds. Also finished products cling to each other and can difficult be handled in the next processing step.

 

The process is disrupted

The flow of materials in production is disturbed by the presence of static electricity or a static charge on the product.

 

My product attracts dust

Dust is not wanted during producting and packaging but the presence of static electricity or a static charge on machine or product causes dust to be attracted and to be attached. This is difficult to remove with normal cleaning if you do not eliminate the static charge.

 

I have a fire in the machine

Static electricity can cause sparks in machines and in environments with flammable gasses or high dust density situations. Without a doubt this can be very dangerous. Solutions can be found by means of anti-static bars for EX applications.

 

What causes static electricity?

Static charge or static electricity is mainly caused by friction between and and the separation of poorly conducting materials, non-conductors or insulators. Static charge can not be seen but it can be be demonstrated by measuring with an electrostatic fieldmeter from Simco-Ion (see FMX-004). See the section measuring instruments for possibilities of online and even real-time measurement on the level of static electricity. Many solutions are possible to solve your issues with static electricity.  Local advice is possible in your own language, please check for your ownh local Simco-Ion representative.

 

Generation of static charge and static electricity

Measuring static charge or static electricity with FMX-004

What methods to use to reduce or eliminate static electricity?

Non-conductive materials (insulators) cannot be discharged by grounding. The most effective and durable solution to reduce the static charge is by active ionisation with an anti-static bar. Active ionisation is created by the use of a high-voltage generator that generates a high-voltage to create ions from the surrounding air. These generate large numbers of positive and negative ions in the surrounding atmosphere, which serve as mobile carriers of charges in the air. As ions flow through the air, they are attracted to oppositely charged particles and surfaces. Neutralization of charged surfaces is rapidly achieved if the number of opposing charged Ions is high and directed at the electrostatical charged material. More details on this topic you can find in our FAQ section.

 

How do Ionisers look like and which one to choose for my situation?

Ionisers are available in different sizes and shapes. The choice depends on the application and a number of distinguishing features:

 

  • Technology (external power supply , or integrated high voltage power supply  24V)
  • Working distance
  • Air supported devices or direct ionisation
  • Material velocity 
  • Object To be neutralised, 3D product or flat material web
  • Environmental conditions, temperature, humidity, Atex zone
  • Inspections

 

Ask you local Simco-Ion representative to come and assist you in chosing the right solution!

 

Check here Simco-Ion anti-static bars.