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Polymer Additives

Innovations in Antistatic Additives

SpecialChem / Jan 5, 2009

Static charge generated on the non-conductive surfaces of polymers is a long identified issue. Plastic materials typically have a combination of high surface resistivity (1014 to 1016 Ohms at 20°C and 50% relative humidity) and low dielectric constant (2 to 3@106 Hertz). These materials readily undergo a charge buildup and can reach a discharge potential in air as great as 15,000 V/cm. The damage threshold of some devices can be as low as a few hundred V/cm. The presence of charged polymer surfaces can therefore have significant consequence during manufacture and product service life that includes: * Production or forming problems * Painting defects * Dust/dirt contamination affecting appearance, performance of end-product * Increased risk of fire or explosion * Destruction of electronic devices by means of static discharge * TV, radio, electronic interferences While various approaches are possible, many of the problems caused by static buildup on plastic surfaces can be alleviated by the use of antistatic agents.

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