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Methods of Controlling Static Charge

SpecialChem / Feb 27, 2008

Static electricity can be a major problem with certain adhesive products such as pressure sensitive coatings, laminating films, and other sheet or film products. Static electricity generally does not come from the adhesive coating but from a non-conducting substrate such as a plastic or paper web. Static electricity can be a nuisance in that it causes dirt or other contamination to gather on the coatings, foul production processes, and damage finished products. However, it also could be a significant safety hazard. Painful and even life-threatening voltages can reach out and strike operators, and a static spark discharge can be disastrous in areas with flammable liquids or gases. Fast production speeds are the main cause of static electricity, but low humidity conditions can be an aggravating factor.This article reviews the causes of static electricity and ways of minimizing or preventing it. Various control options will be discussed including extrinsic methods, such as equipment, process changes, etc.

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