An antistatic masterbatch, optimised for PP, that remains effective even at very low humidity has been developed by Israeli compound, additive and masterbatch manufacturer Tosaf (Afula; www.tosaf.com). Rates of addition of “ST7505HP” of just 1% to 5% for extrusion and 3% to 5% for injection moulding bring about a significant reduction of the high electrical surface resistance, which is typical for products made of PP, the company said. As a result, electrical charges can decay very quickly from moulded parts, rigid packaging or films even in regions with a dry climate or on dry winter days.

The additive has no effect on the colour and transparency of the material and meets FDA and EU requirements for food contact. It is particularly suitable for PP packaging used in the electronics industry as it does not show a corrosive effect on the PC that is commonly used in this sector and does not cause stress cracking of the PC boards. In the film processing industry, it can enable higher production speeds because film layers can be more easily separated from one another.