What are the fire-retardant additives suitable for polyethylene sculptures?
Polyethylene sculptures, widely used in art and public installations, often require fire-retardant additives to meet safety standards. Suitable fire-retardant additives for polyethylene include halogenated compounds (e.g., brominated or chlorinated flame retardants), phosphorus-based additives, and intumescent systems. Aluminum trihydroxide (ATH) and magnesium hydroxide (MDH) are also popular due to their non-toxic, smoke-suppressing properties. These additives work by either forming a protective char layer, releasing flame-quenching gases, or diluting flammable vapors. When selecting an additive, consider factors like compatibility with polyethylene, processing temperature, and environmental impact. Always test the final product to ensure compliance with fire safety regulations such as UL94 or ASTM E84.
