Why are the masks not sealed? Answer: The standard for protective masks does not require sealing of the packaging. What are the benefits of a mask with a breathing valve? Answer: The mask breathing valve is suitable for a relatively sultry environment. It will be more breathable when exhaling, and the inhalation valve will automatically close, which does not affect the use effect at all. It is recommended that the user is comfortable Those with higher sexual requirements and those with more activity Is there any difference in the protection level of masks? Answer: Yes, the certification standards for different protection levels of masks are different. N95 is the testing standard of the United States, KN90 and KN95 are the protection standards of China, and FFP2 and FFP3 are the European protection standards. The specific comparison is as follows: FFP3>FFP2u003dN95u003dKN95>KN90, the higher the protection level, the better the filtering effect, but it can protect against PM2.5. Is the protection level of KN95 and N95 the same? Answer: KN95 level is one of the levels specified in the Chinese standard GB2626-2006, and N95 is one of the levels specified in the American standard 42 CFR 84. The technical requirements and test methods of these two levels are basically the same, but they belong to the standards of different countries. Can masks prevent second-hand smoke? Answer: No protective masks can completely protect against second-hand smoke. High-efficiency anti-particulate masks with activated carbon can indeed filter out most of the particulate matter, but because the amount of activated carbon is very limited, the particulate matter on the mask is filtered The odor continues to evaporate, and for a person with a sufficiently sensitive sense of smell, it will still feel odor, and it may be possible to doubt the protective effect of protective masks. The most effective way to reduce secondhand smoke exposure is to ventilate. Is it normal to wear a copper mask
that is too tight? Answer: The protective mask itself protects against harmful substances. If it is not tight, it will leak air and will not achieve the effect of use. Therefore, it is not tight or protective, but if it is too tight, it will be very uncomfortable. You should consider Change the size (if available), or choose another style of mask. How can masks have a smell? Answer: Protective masks are made of non-woven fabrics, and they are tasteless. The smell of masks is produced by inkjet models and rubber bands, but they are made of high-quality raw materials and will not harm the human body. Health has any impact. How long can the mask be used? Answer: The mask can be reused. Depending on the environment, if it is dirty, it must be replaced in time. When used for the protection of non-oily particles, the cumulative use time does not exceed 40 hours, or the cumulative use time reaches 30 days, whichever comes earlier. What is the difference between anti-particulate masks? Answer: The difference between anti-particulate masks includes three aspects: one is the difference in protection level; the second is the difference in wearing methods (such as headbands, ear straps, etc.); the third is the difference in styles (such as There are foldable and integral molding).
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