In order to make a comprehensive and clear understanding of the various types of respirators protective effect and its standards,strictly follow the relevant national standards for product development,the national standards and technical indicators of domestic and foreign medical protective masks and particulate protective masks were introduced and compared.The characteristics and differences of core technical requirements such as filtration efficiency,tightness and respiratory resistance,as well as the impact of different technical indicators on the protective effect and application environment of masks were analyzed.On this basis,different types of masks were classified in terms of protection levels,and reasonable selection suggestions were put forward,which provides theoretical guidance for promoting standardized research and development,production and sales of protective masks.
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