Photostability of HDPE Filaments Stabilized with UV Absorbers (UVA) and Light Stabilizers (HALS)

摘要

HDPE monofilaments were photostabilized with hindered amine light stabilizers (HALS) and UV absorbers at varying stabilizer concentrations. The filaments were assessed for UV resistance by exposure to simulated outdoor weathering conditions in artificial weathering apparatus and testing the exposed samples at regular intervals for retained tensile properties. Films of HDPE of varying thickness and containing different concentrations of photostbilizers were also prepared. The UV protective ability of the films was assessed by measuring Ultra Violet Protection Factor (UPF). The results indicate that UV absorbers improve the stability of the filaments significantly. However, the best performance was displayed by filaments containing HALS.