[real-time] add layer filter fabric will be able to prevent haze?

Mask national standard implementation, reporters visited

On November 1st, China's first national standard for protective face masks was officially implemented. Recently, the fog in the north of China has been raging, people have put on masks, but have you ever thought that wearing a mask can really block the haze?

Recently, the Yangzi Evening News reporter visited some pharmacies and supermarkets in Nanjing and discovered that masks with the words “PM2.5” appeared on the packages, and the price is generally more expensive.

In a pharmacy in Nanjing Babao Front Street, medical masks that filter PM2.5 have been sold out. The clerk said that professional medical anti-haze masks are indeed a bit expensive, but fortunately, where she could not say clearly. Now that there is a "dust-proof" mask for sale, there is also an anti-fog effect. However, the reporter found that this "dust mask" was not packaged.

In another pharmacy, the reporter found that the price of an ordinary disposable mask 5 was only 16.8 yuan, while the “PM2.5 disposable mask” was only 19.8 yuan. The reporter carefully compared product descriptions and found that the main technical indicators were the same for the standards they met. The “particle filtration efficiency” was not less than 30%. The only difference is that the "PM2.5 disposable mask" has 4 layers, and the ordinary mask has only 1 layer.

In the market in Nanjing, North Central University, the reporter found that the masks here were the cheapest to sell for only 3 yuan. Some masks only became a “fog-proof” mask because they added a layer of filter cloth inside. 30 yuan. The sales staff will be familiar with the promotion of the mask to prevent PM2.5, men, women and children can wear; some masks on the face resembling a gas mask on the respiratory valve device, looks professional, of course, the price is more expensive.

Yangzi Evening News Full Media Reporter Jiao Zhe