New PP Alloy Is ESD-Safe.

A new static-dissipative PP alloy is said to achieve a new level of clean ESD control for applications in handling semiconductors, medical devices, optical disks, and clean-room supplies. Stat-Rite S-250 from BFGoodrich Static Control Polymers, Cleveland, consists of PP alloyed during polymerization with BFG's proprietary antistatic TPU elastomer. The result is said to be a very clean, inherently static-dissipative network in the polymer without the use of conductive fillers that can release contaminating particles.

S-250 is also reportedly the first PP compound to achieve a consistent surface resistivity of 10% ohm/sq, "an optimum target," BFG says, that was previously considered unobtainable with other ESD technologies that gave resistivities either too high or too low. S-250 also shows a much shorter static-decay time of 0.01 sec (from 5000 v), which approaches the decay time of carbon-filled materials.