In natural climate, solar radiation is considered to be the main cause of aging of coatings. In order to improve the performance of products, we need to carry out artificial weathering test, which also requires the use of Xenon weatherproof test box. The main working principle is æ°™The arc radiation source undergoes one of two different light filtering systems to change the spectral distribution of the radiation it produces, simulating the spectral distribution of the ultraviolet and visible light of the solar radiation, respectively. The purpose is to allow the coating to undergo a certain degree of change in the selected properties after being subjected to a certain exposure radiant energy, or to achieve a certain degree of exposure to the radiant energy required for aging. The properties of the exposed coating are then compared to the performance of the unexposed coatings that are also prepared to improve the performance of the product.
Description of protective face shield
Our company is the china leading manufacturers and suppliers of the protective face shield,with the very competitive price and good quality control, the protective face shiled is mad of PET material, it can protect people from gas, virus, water and so on, the face shield has CE/FDA certificate.
For the packing of protective face shield is 200pcs/carton, carton size is 54x35x46cm
Photo of the disposable face shield
Medical Protective Face Shield,Protective Face Shield,Plastic Protective Face Shield,Face Shield Visor
Dongguan Smart Furniture Co.,Ltd , https://www.smtfurniture.com