What are the fire-retardant additives used in polypropylene outdoor pet waste bins?
Polypropylene outdoor pet waste bins require specific fire-retardant additives to enhance safety and meet regulatory standards. Common additives include brominated flame retardants like decabromodiphenyl ether, which effectively suppress ignition. Phosphorus-based compounds such as ammonium polyphosphate provide eco-friendly alternatives by forming protective char layers. Mineral fillers like aluminum trihydroxide and magnesium hydroxide release water vapor when heated, cooling the material naturally. Intumescent systems that expand into insulating foam under heat are also widely used. These additives are integrated during manufacturing at 2-3% weight concentration, ensuring durability without compromising the bin's structural integrity or weather resistance for outdoor use.
