What additives are used to enhance UV stability in polyethylene outdoor pet waste bins?

To enhance UV stability in polyethylene outdoor pet waste bins, manufacturers commonly incorporate specific additives that protect against sun damage, preventing issues like cracking, fading, and brittleness. These additives work by absorbing or blocking harmful ultraviolet radiation, thereby extending the product's lifespan. Key additives include Hindered Amine Light Stabilizers (HALS), which inhibit degradation processes; carbon black, a cost-effective absorber that provides excellent protection when used in sufficient concentrations; and benzophenone or benzotriazole UV absorbers, which absorb UV rays and convert them into harmless heat. Additionally, nickel quenchers may be used in some cases, though HALS are preferred for their efficiency and environmental compatibility. By integrating these additives during the polyethylene compounding stage, the bins maintain structural integrity and appearance even under prolonged outdoor exposure, ensuring reliable performance for pet owners.