1. Personal protective articles to prevent or reduce the dust in the air from entering the human respiratory organs to protect life safety.
2. Material: most dust masks are made of two layers of non-woven fabric inside and outside, and one layer of filter fabric (melt blown fabric) in the middle.
3. Filtering principle: the filter cloth in the middle is mainly used to filter the fine dust. As the melt blown cloth has its own characteristics of static electricity, it can adsorb active small particles. Since the fine dust is adsorbed on the filter cloth and the filter cloth cannot be washed with static electricity, the dust masks are disposable.