What fire-retardant additives are incorporated into WPC for outdoor trash cans in high-risk areas?

For outdoor trash cans made from Wood-Plastic Composite (WPC) in high-risk areas like public parks, transportation hubs, and industrial sites, incorporating effective fire-retardant additives is critical for safety. These additives are integrated into the composite material during manufacturing to significantly reduce flammability and slow the spread of fire. The primary types of fire-retardant additives used include halogen-based compounds, which interfere with the chemical reactions of fire; inorganic hydrates like Aluminum Trihydroxide (ATH) and Magnesium Hydroxide, which release water vapor to cool the material and dilute flames; phosphorous-based compounds, which promote char formation to create a protective barrier; and nitrogen-based synergists, which often enhance the performance of other retardants. Additionally, intumescent systems, which swell up to form an insulating char layer when exposed to heat, are highly effective. The selection of these additives is carefully balanced to ensure they do not compromise the WPC's durability, weather resistance, or structural integrity, while meeting stringent fire safety regulations for public spaces.