What protective mask is reliable and effective protection in life.
Can cotton masks, gauze masks, activated carbon masks, and 3M masks that are currently on the market and online sell "anti-haze"? Is it appropriate to change the filter in the mask every few days? Yesterday morning, Jiangsu Provincial Special Safety Protection Product Quality Supervision and Inspection Center issued the "Mask Risk Monitoring and Analysis Report" in Jiangsu Provincial Quality Supervision Bureau. The report pointed out that the PM2.5 masks purchased in large supermarkets and pharmacies and the higher price anti-fog Haze masks are more secure.
More than half of 162 batches of drawn samples came from "online shopping"
"There are several types of common dust masks, cartoon cotton masks, ordinary absorbent gauze masks, disposable masks, activated carbon masks, industrial dust masks, anti-PM2.5 masks, etc. Our sample inspections are not only in supermarkets, The purchase of pharmacies and other physical stores also covers the field of online shopping." Lu Bing, director of Jiangsu Special Safety Protection Product Quality Supervision and Inspection Center, said that the risk monitoring of this mask purchased a total of 162 batches of samples, including 70 batches purchased in the Nanjing market. Online shopping 92 batches.
Lu Bing told reporters that from the overall situation, there are many mask dealers in the Nanjing market, mainly concentrated in pharmacies, large supermarkets and fashion stores. "However, there are more common cotton masks in physical stores, most of which are fashion masks. There are few professional dust mask brands in large supermarkets and pharmacies, and only a few businesses sell anti-PM2.5 masks and industrial dust masks." and Compared with physical stores, there are more channels for online purchases. Lu Bing said that after investigation, they found that there are many online shopping platforms such as Tmall, Taobao, No. 1 Shop, Yihao Pharmacy, JD.com, etc. There are more than 10,000 mask dealers, and the variety of masks is relatively complete.
Cheap gauze and cotton masks are basically not haze-proof
"At present, there is no unified standard for the haze prevention index of civil masks, but from the results of random inspections, cartoon cotton masks on the market of 2 to 10 yuan, or gauze masks, etc. are basically unable to prevent haze." Lu Bing told reporters that in In all 162 batches of samples, there are 22 batches with a filtration efficiency greater than 90%, accounting for only 13.58% of the total batches. Most of them are anti-PM2.5 masks and industrial dust masks.
So, are disposable masks, activated carbon masks, gauze masks, fashion cotton masks, etc. also "haze-proof"? A series of data in the report gives the answer. The classification results show that: 88 batches of fashionable cotton masks have only one batch with a filtration efficiency greater than 90%, and those with a filtration efficiency of less than 50% account for 90.91%; those with a disposable mask with a filtration efficiency of less than 50% account for 76.92%; those with activated carbon masks with a filtration efficiency of less than 50% Accounted for 70.59%; gauze masks were "overwhelmed" This shows that these types of masks have basically no protective effect on PM2.5.