Classification of masks
The recent epidemic of new pneumonia is serious, and face masks must be worn when going out.
So, what are the commonly masks? Let's take a look together.
1. Cotton mask. Cotton masks once occupied the main market. The main function of cotton masks is to protect against cold and warmth, and to prevent cold air from directly stimulating the respiratory tract. Cotton masks have good air permeability, but the dust and antibacterial effects of cotton masks are almost non-existent. If the epidemic season is high and the weather is hazy, cotton masks have no effect.
Medical non-woven masks. Medical non-woven masks can be said to have quickly entered ordinary families since SARS. Non-woven fabric masks can effectively prevent bacteria, only to prevent the infection of the bacteria caused by the spray, for example, to prevent the spread of bacteria caused by sneezing. However, due to its poor conformability, it cannot play the role of dust prevention. The editor sees that many friends wear such masks in the fog and haze, which is actually effective.
Activated carbon mask. This type of mask refers to the addition of activated carbon in the mask interlayer. The activated carbon has a strong adsorption capacity and can effectively prevent bacteria and dust. However, this mask will make breathing difficult and will be prone to hypoxia after long-term use.
Dust mask. Dustproof masks are generally cup-shaped, which can effectively fit the mouth and nose parts, so as to achieve the effect of dustproof.
N95 masks. n95 is a kind of dust mask, N means dustproof, and number means efficiency. Today, with smog prevailing, if you want to prevent pm2.5, you must use a mask above n95.