Results of mask quality risk monitoring: most filtration efficiency values were lower than the standard

March 18 news: according to the morning news, smog pollution occurs frequently, and all kinds of masks with protective functions are sold out of stock. However, are these masks boasting “PM2.5 protection”, “dust isolation” and “haze prevention” really effective? The results of quality and safety risk monitoring of mask products released by the Municipal Bureau of quality supervision yesterday showed that among the 38 batches of mask products monitored, 24 batches of mask products’ filtration efficiency measured values were lower than 90% of the minimum requirements specified in the standard. The actual test result of filtration efficiency of a “Yixin” sc600c ordinary polyester dust mask is “0”

the dust-proof effect of some masks is poor

the reporter learned from the municipal quality supervision department that at present, both medical protective masks and industrial dust-proof masks have national standards and are included in the scope of production license management. However, the quality requirements of other kinds of masks with nominal protective function are confusing. Some of them implement the standards of medical protective masks, some implement the standards of industrial dust masks, some implement the enterprise standards, and some do not have any implementation standards

to this end, the Municipal Bureau of quality supervision carried out quality and safety risk monitoring on the mask products with the nominal functions of “PM2.5 protection”, “dust isolation”, “haze prevention” produced and sold (including online sales) in the city. A total of 38 batches of samples were collected, covering the main brands produced and sold in the city. National standards such as gb2626-2006 respiratory protective equipment, self-priming filter type anti particulate respirator, GB15979-2002 hygienic standard for disposable sanitary products, and gb18401-2010 national technical code for basic safety of textile products were adopted to analyze the identification, filtration efficiency, microbial indicators (total bacterial colony count, coliform group, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count, total bacterial count The total number of pathogenic pyogenic bacteria and fungi colonies), the technical requirements for textile safety (formaldehyde content, pH value and decomposable carcinogenic aromatic amine dyes), etc

in the most concerned mask filtration efficiency monitoring test, the measured value of filtration efficiency of 24 batches of masks was lower than the minimum requirement of 90% specified in the standard; The filtration efficiency of one batch of masks was lower than 95%; The grade of filter material is not marked in the identification of 21 batches of products; 6 batches of unmarked products. Among the products with low filtration efficiency, the measured values of filtration efficiency of many masks are surprisingly low. For example, the test result of Yixin sc600c ordinary polyester dust mask distributed by Putuo Branch of Jinjiang Metro cash & Transportation Co., Ltd. is “0.0”

may wear “skin problems”

the total number of bacterial colonies, coliform bacteria, pathogenic pyogenic bacteria and fungal colonies and other microbial indicators of 38 batches of masks monitored this time did not exceed the standard. However, in 13 batches of cotton, gauze and other textile masks, the pH value of 6 batches of fabrics or lining exceeded the standard value

at present, the relevant risk monitoring results have been informed to the production enterprises, distribution enterprises and their local quality and technical supervision departments to urge the enterprises to standardize production and strengthen product quality control. At the same time, the Municipal Bureau of quality supervision has reported the quality and safety risk information of mask products to relevant departments, and it is suggested that relevant national standards be issued as soon as possible

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