There are several types of secondary masks, non-medical masks and medical masks. In general, the protection of the former is relatively weak, and the protection of the latter is better.
What kind of fabric is good for masks? Masks can be divided into non-woven masks, gauze masks, and activated carbon masks according to their materials.
Ordinary medical masks are common gauze masks, with four-layer, eight-layer, and sixteen-layer specifications. It meets the relevant registered product standard (YZB)
Imported KN95 grade non-woven filter material has excellent filtration effect, while being soft and breathable, it improves the efficiency of filtering particles without increasing breathing resist...