Although there is still a period of time from the national resumption of work, but now some provinces and cities are still resuming work one after another, most people still have to squeeze the subway, take the bus, wearing a mask is the standard, but masks can not be bought, can not afford to buy, so, for the ordinary commuters, how to extend the service life of the mask?
? To emphasize, I specifically made it clear that it is a protective mask worn by the general health population on their daily commute and work scenarios.
Checked the literature, N95 masks leather, daily life scenarios for 6 days, the filtration efficiency can also guarantee 90%. That is to say, if it is a N95, wear the process did not and droplets short, then wear a week are possible, if not to go to high pollution areas, two weeks are acceptable.
In order to prevent the outer surface of the mask is directly contaminated by dirt, you can give the mask and then wear a mask, that is, the outside plus a thin cotton cloth mask that can be washed, soap every day to carefully wash this external protection cloth mask after drying.
Of course, now the shortage of supplies, N95 left to the medical staff to use it, we wear N90 and ordinary medical masks are enough.
Referring to the test report of Taiwan Labor Safety and Health Research Institute:
1, drying the mask at 70 degrees Celsius for half an hour is a safe and feasible way to deal with the filtering efficiency of the mask and the shape of the damage is relatively small.
I suggest that the preferred oven, in addition to the family clothes dryer can also be, put the mask in the bra laundry bag, put it in the drying can be.
2 , ultraviolet disinfection, wavelength 254nm, 30300 microwatts (seconds / square centimeter) intensity, 30 seconds is enough. This is the best way, if there is a corresponding ultraviolet small equipment, save time and trouble, and maximize the protection of the appearance of the mask, you can appropriately extend the disinfection time to 3 to 5 minutes, because of the concern that the ultraviolet intensity is not enough.
3, spray alcohol on the outside surface of the mask, not too much energy, do not get wet mask, wet deformation also damage the mask filtration, is not the preferred method, similarly, steam steam mask is not a good idea, emphasize that it is important to keep the mask dry.
To summarize, wearing cloth masks for masks, disinfecting them with UV or dry heat is the best way to reuse them, and if the masks have exhalation valves, then drying them should be considered as the exhalation valves will be damaged, and you can lower the oven temperature to 56 degrees Celsius, which is enough to eliminate the new coronavirus. Taiwan's recommended 70 degrees Celsius is able to extinguish common E. coli.
Of course, it's important to wash your hands regularly, and it's best if you can stay at home and not go out.
The SARS period is not now so advanced N95, infectious diseases doctor is wearing a dozen layers of thick gauze masks, buy this mask, winter wear or acceptable, wet hurry to change, wash every day, washed and dried repeatedly, as long as you do not go to the hospital, this thick gauze masks, although a little earth, or have a definite role. I heard that 32 layers of gauze masks can stop droplets, can also prevent virus attack, but with poor facial closure, anti-virus efficiency is relatively low. However, for ordinary life scenarios, it is feasible to wear a gauze mask to block droplets while washing hands diligently. The biggest advantage is that you can make your own, reusable, usually 18 layers is enough.
In fact, there is no mask that meets the requirements, squeeze the subway bus to wear a cloth mask is also better than not wearing, their own gas wet immediately after the removal, alcohol disinfection of the hand and then put on a new mask. Wearing a mask in China is a must, because of high population density, take the public **** transportation crowd size, develop a habit of not spitting, coughing and sneezing elbow joints covered by the people are not many
Another note: the knowledge of masks
A mask is divided into three standards:
n95 is produced according to U.S. standards NOISH, manufacturers are 3M and Honeywell;
FFP2 is the most popular masks in the United States. p>
FFP2 is the European standard EN149;
KN95 is the Chinese standard GB2626-2006.
All masks printed on the implementation of the standard is the three are qualified masks.
Second, medical n95 masks need to prevent high-pressure liquid splash, so higher standards than ordinary n95; 3M, for example, models 1860 and 9132 are the most commonly used medical protective masks.
In addition, there are children's models of 1860s. ordinary people or medical personnel who are not exposed to high-pressure liquid splashes can choose ordinary n95 masks that meet the NOISH standard.
Third, the European producers of FFP2 standard masks are UVEX of Germany, etc.; FFP3 is a higher level (99) of protective masks.
Fourth, the Chinese standard GB2626-2006 refers to the ordinary KN95 mask standard.
The medical KN95 mask standard is GB19083-2010.
(Similarly, ordinary people and medical personnel who are not exposed to high-pressure liquid splashes can use ordinary KN95 masks.)
Fifth, another common question is, masks to choose with valve or without valve mask? Ordinary masks with valves are more comfortable.
Medical masks are not allowed to have valves.
When the average person is infected or suspected to be infected, a medical mask without a valve must be chosen.
Sixth, medical surgical masks, the common standard is YY0469-2010, or YY0469-2011, which is printed on the individual outer package of each mask.
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1860 / 1870+ This model is used for medical work, anti-wet dust, etc.
8210 / 8511 This model is used for construction work, anti-dust, etc.
9210+ This model is used for industrial work, anti-sand dust and rotting material, etc.
From foreign generation, it is very likely that you can buy the building with the N95 dust mask, not at all anti-virus, we must look carefully ~ or knowingly but intentionally: the following two models were purchased by a large number of substitutes, including the famous 3M brand, although they are N95, but purely for construction