Judging from the filtering raw materials of air purifiers, there are only four kinds on the market at present:
1, the first is a coarse screen, and the main material is generally a stainless steel mesh;
2. The second type is generally HEPA filter, but this is also different. For example, some enterprises use the NCHEPA filter, which is different from the HEPA filter alone. For example, Gibson air purifier uses the eighth generation NCHEPA filter. The main material is nanofiber carbon;
3. The third is the composite filter screen, which is mainly used to remove harmful substances such as odor and formaldehyde. The main material is hacf coconut shell gold fiber;
4. The fourth is the photocatalyst filter, whose main function is to remove bacteria, viruses, mites, etc. The main material is photocatalyst formed by titanium dioxide and ultraviolet lamp.
To sum up, the filter material of air purifier is basically composed of stainless steel, activated carbon, coconut shell fiber, ultraviolet lamp and titanium dioxide.