Most of the Wood - plastic composite products are used in outdoor conditions, and their anti-aging properties, especially UV (UV) performance, have a significant impact on the service life of the material. The surface chemical properties of WPC exposed to UV will change, resulting in photodegradation, resulting in discoloration of the surface of the product and a decrease in aesthetics.
Most of the Wood - plastic composite products use a period of time after the trend is lighter, and may affect the other properties of the material, so light stability is an important research area. In the laboratory accelerated aging test, the production of the specimen under the artificial light source, set the irradiation intensity, irradiation time, spray time or temperature and humidity conditions, after a certain number of periodic treatment, the test sample of various performance. Light source can use xenon arc lamp or UV fluorescent lamp. For example, one of the methods is to place the specimen in the xenon arc lamp aging test machine, by the xenon lamp irradiation (108min) and xenon lamp irradiation plus water (12min) of the alternating treatment.
The change of the material color can be determined by the physical color measurement method according to the chromatic aberration parameter. The study of wood powder composite materials shows that compared with wood compared to wood-plastic composite materials, anti-ultraviolet and anti-aging ability is much better. Experienced 12 months of outdoor weathering, wood-plastic composite material color change only solid wood 1/3, and the change in solid wood thickness than wood-plastic composite material 3 times.
It can be seen that the wood-plastic composite flooring is suitable for long periods of light.