Abstract: UVA-340 lamp was used as an artificial acceleratedphotoaging source. The variation in carbonyl index, tensile strength, and elongation at break before and after aging was investigated, and the effect of antiaging agents on antiaging properties of drip irrigation tape was analyzed. It showed that the drip irrigation tapes with selfmade antiaging masterbatch had the best antiaging performance, compared with the 0 days aging sample, retention rate of elongation at break of the samples artificial aging for 10 days, 12 days and naturally exposed to 120 days aging were 94.3 %, 84.0 %, 61.9 %, respectively. UV340nm light at the condition of the radiation strength of 0.68 W/m2, blackboard temperature of 60 ℃, condensing temperature of 50 ℃, exposure time of 3 h, condensing time of 3 h, wind of 10 min, the aging rate was about ten times based on artificial accelerated photoaging more than that at natural environment.

Key words: drip irrigation tape, artificial aging test, UV lamps, elongation at break