Magnesium stearate is a fine, white powder commonly used as an external lubricant and release agent in plastic processing. It enhances material flow, reduces friction between molten resin and metal surfaces, and helps prevent agglomeration in compounded systems.
1.Is magnesium stearate safe for use in plastics?
Yes. It is widely approved for industrial use and is thermally stable under standard processing conditions.
2.How is it different from zinc stearate?
Magnesium stearate provides softer lubrication and is more suitable for applications needing gentle release or better dispersion in powder form.
3.What is its typical dosage?
It is used at 0.1–1% depending on polymer type and processing needs.
4.Can it be used in food contact plastics?
Food-grade versions are available, but use depends on regulatory requirements and application specifics.
