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What you need to know about masks

2020-07-04  167

N95 mask

1, N95 mask is NIOSH (National Institute for Occupational Safety and Health) certified nine kinds of particle protection mask in the one type.

"N" indicates not resistant to oil, "95" indicates exposure to specified levels of oil. The concentration of particles inside the mask is more than 95% lower than the concentration of particles outside the mask for the number of dedicated test particles.

The value of 95% is not an average value, but a minimum value. A protection rating of N95 means that the mask filter media is resistant to nonoily particles (such as dust) under the test conditions specified in the NIOSH standard. N95 is not a specific product name, as long as it conforms to the N95 specification. Type N95 masks are called "N95 masks" if they have passed the NIOSH standard and have been reviewed by NIOSH. Up to 90%.

2. Scope of use of N95 masks:

Protection of medical and related staff against airborne respiratory infections.

Basic protection of medical or related personnel and protection against the spread of blood, body fluids and splashes during invasive procedures.

Disposable hygiene care in a general environment, or barrier or protection against particles other than pathogenic microorganisms, such as pollen.

3. other NIOSH approved particle mask levels include N95, N99, N100, R95. R99, R100, P95, P99, and P100, for a total of 9 types. These protection levels are able to cover the range of N95.

"N" stands for not resistant to oil, suitable for non-oily particles, no use. Time limit.

"R" stands for resistant to oil and is suitable for oily or nonoily particulate matter, if used for oily or nonoily particulate matter. For protection against particulate matter, use for up to 8 hours.

"P" indicates oil proof and is suitable for oily or nonoily particulate matter, if used for oily particulate matter. Time should follow manufacturer's recommendations.

"95", "99" and "100" refer to the level of filtration efficiency when tested with 0.3 micron particles. "95" indicates a filtration efficiency of 95% or greater, "99" indicates a filtration efficiency of 99% or greater, and "100" indicates filtration Efficiency at over 99.7%.


KN95 Mask

KN95 is the classification of Chinese national standard GB2626-2006 for anti-particulate masks, which refers to 0.075 microns. More than 95% of the non-oil particles filtering efficiency of the mask. According to the performance is divided into KN and KP two categories, KN class is only suitable for filtering non-oily particles, KP class is suitable for filtering oily particles.

1, KN series.

KN100: filtration efficiency greater than 99.97% for non-oily particles above 0.075 micron

KN95: filtration efficiency >95% for non-oily particles above 0.075 micron

KN90: greater than 90% filtration efficiency for non-oily particles above 0.075 micron

2. KP Series.

KP100: filtration efficiency >99.97% for oily particles above 0.185 micron.

KP95: filtration efficiency >95% for oily particles above 0.185 micron.

KP90: filtration efficiency >90% for oily particles above 0.185 microns

3、KN90 mask range of application:

Mainly applicable to non-ferrous metal processing, metallurgy, iron and steel, coking, gas, organic chemicals, food processing, construction, decoration, petrochemical and Asphalt and other industries that produce more than 0.185 microns of dust, smoke, fog and other oily and non-oily particulate pollutants.

So: KN95 mask and N95 mask these two levels of technical requirements, test methods, etc. are basically the same, only belong to the Standards in different countries.


3M mouthpiece

"3M Mask" refers to all the 3M products can be called masks, according to the broad categories can be divided into medical masks, particle protection masks, comfort and warmth masks three categories, each type of mask have a different focus of protection.

1, 3M medical protective masks. The first one is the one that is used for the first time, and the second one is the one that is used for the second one, and the third one is the one that is used for the third one. A protective mask for particles in the air and to block droplets, blood, body fluids and secretions.

2, 3M Particulate Mouthguard. Commonly known as 3M dust masks. The use of protective masks at work to protect the health of workers belongs to the category of occupational health. Anti-particulate masks used to reduce the respiratory inhalation of various types of harmful particles suspended in the air (from coarse dust, dust, to a variety of). (fine dust, fumes, smoke, and air pollutants PM2.5 from manufacturing processes, also including fine pathogens).

3M masks (high efficiency protection against harmful particles) 90, 93, 95, 99 beginning, 8210 and 8110s are compliant with the China's requirements for protection against PM2.5! But if you want a smooth exhale and meet US or EU standards, use 8210V, 9322, 9332! If you want to 9010, 8210, 8110s, 8210v, 9010, 8210s, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v, 8210v 9322, 9332! (suitable for young children).


Surgical masks for medical use

Medical surgical masks are the masks worn by medical and nursing staff when working. It is mainly used in medical outpatient clinics, laboratories, operating rooms and other high demand medical environment, safety factor is relatively high, for the bacteria, viruses and other It is highly resistant. Medical surgical masks are also used to prevent the spread of influenza and respiratory diseases. Medical surgical masks have three layers, from the outside to the inside are the waterproof layer, the filter layer, and the comfort layer, which is a layer of gauze.


Comprehensive Comparison of Performance

1, from the protective capacity: N95 mask ≈ KN95 mask > N90 mask > medical surgical mask > general mask

2、Wearing comfort: ordinary mask ≈ medical surgical mask > KN95 mask ≈ N95 mask


Mask-related standards

1. YY/T 0969-2013 Single-use medical masks.

2. YY 0469-2013 "Medical surgical masks".

3. Knitted masks FZ/T 74039-2014 "Knitted masks".

4. GB 2626 Respiratory protection articles -- self-absorption filtered anti-particle respirator.

5、GB/T32610-2016 "Technical Specification for Daily Protection Mask".


Warm Tips

The outer layer of the mask tends to accumulate a lot of dust, bacteria, and other dirt from the outside air, while the inner layer blocks exhaled bacteria and saliva. Therefore, the two sides should not be used interchangeably, otherwise the outer layer of contaminated dirt will be inhaled when directly close to the face, and become a source of infection. When the mask is not worn, it should be folded and placed in a clean envelope, and the side close to the nose and mouth should be folded inwards, and should never be slipped into a pocket. Or hang it around your neck.

If the mask is wet from exhaled hot air or saliva, its ability to block germs is greatly reduced. Therefore, it is always a good idea to have a few extra masks for replacement use, and they should be changed daily. Masks should be consistently cleaned and disinfected daily, whether it is a gauze mask or an air filtering mask that can be disinfected with heat. This is done by.

1.Washing. First gently rub the gauze mask with warm water and soap, the bowl-shaped mask can be gently brushed with a soft brush dipped in detergent, and then washed with water . Please note that the gauze should never be rubbed too hard, because if the warp and weft gaps are too large, the droplet barrier will be lost.

Disinfection. Soak the cleaned mask in a 2% peroxyacetic acid solution for 30 minutes or boil it in boiling water for 20 minutes or put it in a steamer to steam. 15 minutes, then let dry for later use. This method applies to gauze masks and bowl masks.

Check. Before use again, you should carefully check whether the mask and mask is still intact, for gauze masks and masks can be taken for light transmission inspection method. If you have any questions, please check the light before taking the lamp to see if there are any obvious points of light, and if the light transmittance of the middle part and the edge part is the same. You'll need to replace them with new ones. Regardless, masks and mouthpieces should generally be renewed after 3 to 7 washings, and particularly good quality masks can be cleaned up to 10 times. Activated carbon adsorption mask to pay attention to regular replacement of activated carbon sandwich, if the activated carbon sandwich is not replaceable, after 7 to 14 days. It will have to be replaced, and this mask cannot be cleaned and reused.