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Weathering-Aging and UV Degradation of Polypropylene Spunbond Nonwovens

Polypropylene spunbond nonwovens were researched by comparing ultraviolet degradation and weathering-aging. The spunbond nonwoven samples with different content of CaCO3 were exposed to ultraviolet lights from UVA-340 lambs and natural sunshine. Trends of the decrease of mechanical properties of all samples are similar but the curves in artificial UV degradation are steeper. CaCO3 can promote the degradation of polymer matrix while weight per unit area has a less impact on the photo-degradation.