Because masks must be sterilized when they leave the factory. According to the official WeChat account of the Ministry of Industry and Information Technology: China's production of masks is very fast, only 0.5 seconds per piece, but the standard process of analysis and disinfection after production takes 7 days to half a month.
Medical masks are sterilized by ethylene oxide. After sterilization, there will be ethylene oxide residues on the masks. The residual ethylene oxide must be released through analytical methods to meet the safety content standards. Only after passing the test can it be used. Factory listed. We offer Mask Making Machine products, please contact us if you are interested.