Weatherability of Polypropylene by Accelerated Weathering Tests and Outdoor Exposure Tests in Japan

Table 4

Features of lamps for weathering test machine.

Lamp type	Mechanism	Characteristic of spectral distribution	Standard related to plastics
Xenon arc	Light by passing electricity through ionized Xenon gas in glass tube	Extremely resembling sunlight in UV and visible part	ISO 4892-2 (same as JIS K7350-2) [23]
Open flame carbon arc	Carbon arc in open air	Resembling sunlight UV-B (280–315 nm) and severalfold intensity in UV-A (315–400 nm)	ISO 4892-4 (same as JIS K7350-4) [24]
Ultraviolet carbon arc	Carbon arc in glass tube	Major peak at 388 nm, minor peaks at 358 and 415 nm	JIS B7751 [25], ASTM D5031 [26]
Metal halide lamp	Light by passing electricity through ionized mercury and metal halide gases in quartz glass tube	20–30 times UV (270–450 nm) as compared to sunlight	None

ISO: International Standard, JIS: Japan Industrial Standard, and ASTM: American Society for Testing and Materials.