Antistatic masterbatches are for commodity plastics. Commodity plastics by nature possess an electrical insulating property which gives them the potential to built-up high static charge on their surfaces due to friction caused by dry air moving over them or movement against other the surfaces.
By virtue of their insulating nature, polymers of all types allow static charge to build-up on their surfaces, particularly in the case of films and fibers, which have large surface area to volume ratio. Such static charge build-up leads to several undesirable consequences in the final product. For instance, built-up static charge can attract dust onto a food package, which is undesirable aesthetically. At times, static charge can damage circuit boards in electronics packaging and may cause hazards of fire or explosion in the vicinity of flammable materials.
The static charge may also cause several processing problems such as difficulty in winding of films or melt-spun fibers, agglomeration of powders during transport, adhesion of films during processing, etc. Such undesirable effects of static charge build-up can be avoided by using masterbatches containing antistatic agents. The most commonly used are those compounded internally with the polymer and those applied topically.
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