Antistatic Agents in PVC

Antistatic agents are added to PVC formulations to prevent the build-up of static electrical charges, which could lead to an electric shock or a spark causing a fire in a dusty or flammable area. Dust build-up is also reduced.

By adding an antistatic agent (complex non-ionic or cationic materials) at 5–12 phr, the surface resistivity is reduced, along with a reduction in static charge accumulation. These agents function by the formation of an antistatic layer on the surface, which by attraction of moisture and in combination with the antistatic agent itself conducts away charges.

The addition of antistatic agents can have a detrimental effect on processing, particularly heat stability, and this aspect needs to be taken into account. An alternative method of achieving antistatic performance, although not so permanent, is to apply a coating after fabrication.