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Analysis of relevant standards for mask detection
Speaking of the 2020 Spring Festival, I believe that the new crown virus is a topic that everyone cannot avoid. Usually masks are optional for most people, not a necessity. However, the new crown virus of 2020 has made masks stand on the air, almost overnight. Face masks across the country are out of stock and prices are skyrocketing. Driven by huge interests, all kinds of fake and shoddy masks are popular. Today, I will briefly introduce to you from a professional point of view. A qualified mask is considered to pass the test only after going through those tests. A smog made us aware of PM2.5 masks, and an epidemic made us aware of N95 masks. but. Do we really know about masks? Why are N95 masks called n95? Not called n97? n98? Do you know these questions? In fact, there is a project in the detection of medical protective masks called filtration efficiency rating. In detail, it is the evaluation and detection of the filtration efficiency of non-oily particles of medical masks under the condition of gas flow rate of 85L/min. The specific levels are divided into three categories, namely≥95%,≥99%,≥99.97%. The N95 is named after this. In addition to medical protective masks and daily protective masks, our daily contact masks also include disposable protective masks, knitted masks, mask paper and other products. In addition, there is a self-priming filter type anti-particulate mask, which was later changed to a self-priming filter type anti-particulate respirator in order to describe more accurate national standards. Today, we will introduce the testing standards and items of these masks in detail to you. 1. The testing standard for medical protective masks is GB 19083-2010 'Technical Requirements for Medical Protective Masks'. The testing items mainly include basic requirements testing, fit, nose clip testing, mask belt testing, filtration efficiency, airflow resistance testing, synthetic blood penetration testing, surface moisture resistance testing, ethylene oxide residues, flame retardant properties, skin Stimulation performance testing, microbial testing indicators, etc., among which microbial testing items mainly include total bacterial colonies, coliforms, Pseudomonas aeruginosa, Staphylococcus aureus, hemolytic streptococcus, total fungal colonies and other indicators. 2. The testing standard for regular protective masks is GB/T 32610-2016 'Technical Specifications for Daily Protective Masks'. The inspection items mainly include basic requirement inspection, appearance requirement inspection, internal quality inspection, filtration efficiency and protection effect. Among them, the internal quality inspection items mainly include color fastness to rubbing, formaldehyde content, pH value, decomposable carcinogenic aromatic amine dye content, ethylene oxide residue, inhalation resistance, exhalation resistance, mask belt and the connection with the mask body Breaking strength, fastness of exhalation valve cover, microorganisms (coliform bacteria, pathogenic purulent bacteria, total number of fungal colonies, total number of bacterial colonies) 3. The detection standard for mask paper is GB/T 22927-2008 'Mask Paper'. The testing items mainly include tightness, tensile strength, air permeability, longitudinal wet tensile strength, brightness, dustiness, fluorescent substances, delivery moisture, hygiene indicators, raw materials, appearance, etc. Fourth, testing standards for disposable medical masks The testing items for YY/T 0969-2013 'Disposable Medical Masks' mainly include appearance, structure and size, nose clip, mask belt, bacterial filtration efficiency, ventilation resistance, microbial indicators, ethylene oxide residue, biological evaluation . Among them, the microbial indicators mainly detect the total number of bacterial colonies, coliform bacteria, Pseudomonas aeruginosa, Staphylococcus aureus, hemolytic streptococcus, and fungi. Two biological evaluation items include cytotoxicity, skin irritation, delayed type hypersensitivity and so on. 5. The testing standard for knitted masks is FZ/T 73049-2014 'Knitted Masks'. The test items mainly include appearance quality, internal quality, pH value, formaldehyde content, decomposable carcinogenic aromatic amine dye content, fiber content, color fastness to soaping, color fastness to water, color fastness to saliva, color fastness to rubbing , Color fastness to perspiration, air permeability, odor, etc. Six, PM2.5 protective masks testing standards are T/CTCA 1-2015 'PM2.5 protective masks', TAJ 1001-2015 'PM2.5 protective masks'. The testing items mainly include appearance testing, formaldehyde, pH value, temperature and humidity pretreatment, decomposable carcinogenic ammonia dyes, microbial indicators, filtration efficiency, total leakage rate, breathing resistance, connection force between the mask strap and the main body, dead space, etc. , Self-priming filter type anti-particulate respirator testing standard for self-priming filter type anti-particulate mask was originally GB/T 6223-1997 'Self-priming filter type anti-particulate mask' has now been abolished. Now mainly based on GB 2626-2006 'Respiratory protective equipment. Self-priming filter type anti-particulate respirator' for testing, the specific testing items include material quality testing, structural design requirements testing, appearance testing, filtration efficiency testing, leakage, disposable TILv of full face mask, TI test of replaceable half mask, full face mask TI test, breathing resistance, breathing valve test, breathing valve air tightness, breathing valve cover test, dead space, visual field evaluation, headgear, connecting parts and connections Mask testing such as stress test, lens test, air tightness test, flammability test, cleaning and disinfection test, packaging, etc. is a scientific and serious matter. It must be implemented in accordance with relevant standards. In addition to the above standards, there are also some local standards for mask testing, such as DB50/T 869-2018 'Applicable Specifications for Dust Masks in Dusty Workplaces', which stipulates dust masks. There are also testing method standards, such as YY/T 0866-2011 'Test Method for Total Leakage Rate of Medical Protective Masks', YY/T 1497-2016 'Test Method for Evaluation of Virus Filtration Efficiency of Medical Protective Mask Materials Phi-X174 Phage Test Method'.
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1. ISO 5402-1: Specifies the flexometer method for testing leather flex resistance under repeated bending.
2. ISO 17694: Defines test methods for footwear upper and lining flex resistance, simulating real-world bending stress to assess long-term durability.
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