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Electrostatic Systems Basics and Applications

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What gets us moving Eltex is a leader in the area of applied electrostatics, with a particular emphasis on the printing, packaging, finishing, and plastics industries. In this manual, Eltex gives you an overview of the basics, problems and solutions of static electricity. Target groups and customers 11 Physical basics of electrostatic energy 12 Electrostatic problems in the production process 13 Preventing and controlling discharges 14 Electrostatic energy in a double role 15 Electrostatic Printing Assist for the Print Industry (ESA) 19 Electrostatic remoistening systems 20 Electrostatic...

THE NAME ELTEX STANDS FOR COMPREHENSIVE EXPERTISE IN DEALING WITH ELECTROSTATIC ENERGY. WITH IN-DEPTH EXPERIENCE AND FORWARD-LOOKING TECHNOLOGIES FOR OPTIMAL WORKFLOWS. ALWAYS RELIABLE. ALWAYS BETTER. SINCE 1953.

ELECTROSTATIC CHARGES IN PRODUCTION PROCESSES ARE UNAVOIDABLE. HOWEVER, THEY CAN BE MANAGED WITH INTELLIGENT CONTROL. FOR CONTROLLED DISCHARGE OR FOR USE AS A HELPFUL AND WELCOME FUNCTION. WITH INTELLIGENT INNOVATIONS FROM ELTEX. In many industries,

 at many locations: one solution

Shorter processes – with solutions

ALL ELECTROSTATIC SYSTEMS FROM ELTEX SHARE THE SAME PRINCIPAL FUNCTION: OPTIMIZING PROCESSES. OPTIMALLY SAFE, OPTIMALLY PRODUCTIVE AND COST-EFFECTIVE. THIS QUICKLY SAVES YOU A GREAT DEAL OF TIME AND MONEY.

Electrostatic energy: once a problem, now a solution. Charging and discharging bodies with static electricity is a phenomenon based on simple laws of physics. As these laws are universally applicable, static electricity is present in every area of industry. Spontaneous and uncontrolled discharges can cause substantial problems, as they impair production processes and thus incur unnecessary costs. Our systems and concepts help you neutralize electrostatic energy or even use it in a targeted manner, thus turning it from a nuisance to a benefit. Some of the industries that use such systems...

Target groups and customers Charging and discharging systems on extruders (pictured: W&H) Why do you need Eltex? Primarily if you are a company whose workflows may e xperience interference from unidentified electrostatic energy or can be improved by its use. If you want to make your production faster, safer and more cost-effective, we help you do just that with our systems and expert advice. As a mechanical engineering company, you need Eltex in order to equip your products with factory-installed systems to offer your customers higher safety, reliability and quality. ficial part of the...

Physical basics of electrostatic energy Tiny differences Electrostatic energy can be traced back to the smallest building blocks of the material world: atoms. These consist of protons in the nucleus and electrons in the cloud. Electrons have a negative charge, protons a positive one. If the number of these two particles is equal, the entire atom is electrically neutral. Only contact results in a charge If two atoms and their clouds meet each other, make contact briefly (for example) and then are quickly separated, electrons jump from one body to the other. This process, which results in an...

Electrostatic problems in the production process Discharge system on reel cutting machines A plastic example A good illustration of charging and discharging in a production process is provided by the plastic film web. If a film web of this type is unwound, the foil surfaces are s eparated from each other suddenly and at a high speed: the film is charged. Even if there is only a split-second between contact and separation, discharge may take days. Though the currents developed during this process are relatively weak, the voltages that occur may be several hundred thousand volts high. A...

Preventing and controlling discharges Provoking discharge Some conditions are highly conducive to uncontrolled discharge. Products with low moisture or rooms with low humidity, materials that can be charged electrostatically (because they have high insulation performance) and a high contact coefficient ensure that frequent and strong charges can take place. Slippage on webs, dielectric fluids at pipe bends or friction at smooth surfaces are additional factors that are conducive to electrostatic energy – and, quite likely, trigger uncontrolled discharges. To prevent problems, a controlled...

Electrostatic energy in a double role For electrostatic charging, in addition to the material and its insulation value, the critical factor is how quickly the materials are moved. The higher the speed, the stronger the electrostatic charges will be. In most production processes, the objective is to manage the greatest possible quantities of material at the highest possible speed. Electrostatically clinging materials and uncontrolled discharges are thus inevitable. As described above, unless the charge is controlled and eliminated, its spontaneous, uncontrolled discharge can lead to faults,...

Measuring devices provide monitoring and documentation of the efficiency of discharge systems used Controlled grounding safeguards production facilities from dangerous discharges Reliable results Before we can eliminate unwanted electrostatic energy, we first have to know how and where it occurs. The basis for eliminating electrostatic energy is measuring the charge and resistance to ground. In all of these measurements, the instability of electrostatic phenomenona must always be taken into account, along with other sources of error. Precisely when handling highly inflammable materials,...

In many industrial areas, there are charges that cannot be readily discharged using grounding. In this case, systems have to be used that combine active and passive discharge. Distinct advantages exist in the areas in which the phenomenon of electrostatic energy does not have to be n eutralized, but can actually be used in a beneficial way – with the correct technology. For example, if we charge p aper or plastics unevenly, we can bond them to each other electrostatically. Electrostatic adhesion, blocking/ tacking or adhesion has multiple advantages: it leaves no trace whatsoever behind,...