n95 niosh-approved masks

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N95 Niosh-Approved Masks are listed here

N95 Niosh-Approved Masks are listed here. The N95 Niosh-Approved Masks are protected by filtering particles in the air breathed by users. They can filter at least 95% of non-oil borne airborne particles. The N95 Niosh-Approved Masks is lightweight and can improve worker acceptance and help prolong wearing time.N95 Niosh-Approved Masks cover most of the face and protects the wearer from dust and microbes. N95 Niosh-Approved Masks are made of several special layers of nonwoven polypropylene (synthetic polymer) fabrics. The fabric is produced by the melt-blown process and forms an internal filter layer in the N95 mask to filter out harmful particles.

Differences Between N95 Mask and N99 Mask

When comparing the N95 or N99 respirator mask, both are designed to protect workers from dust and airborne particles that can become airborne. The primary difference between the two is that the N95 respirator can only be used for particles of size one micron or smaller, while the N99 respirator mask can be used for particles up to one micron in size. So, what is the difference?

Differences Between N95 Mask and N99 Mask

KN95 Mask vs N95 Mask vs FFP2 Respirator Masks

KN95 mask can help reduce exposure to biological substances, like bacteria and viruses. Please note however that wearing a mask cannot eliminate the danger of infection because it depends on the right fit of the wearer. A study published in 2008 showed that masks were up to 80% effective in reducing transmission and infection from an airborne virus. Different countries have different regulations and standards for facepiece respirators, and they are applicable to their respective national physical characteristics, national acceptance, etc.

KN95 Mask vs N95 Mask vs FFP2 Respirator Masks

3m kn95 mask gb2626-2006

3m kn95 mask gb2626-2006 refers to the implementation standards that masks produced in China must comply with. This standard is now obsolete. The standard for masks currently implemented in China is gb2626-2019. Chinese standard name: 呼吸防护自吸过滤式防颗粒物呼吸器; English standard name: Respiratory protection—Non-powered air-purifying particle respirator.

3m kn95 mask gb2626-2006

Where to Buy N-95 Mask? Here.

Where to buy an n-95 mask? Here. We specialize in the production of an n-95 mask. Here is detailed product information.

where to buy n 95 mask

N95 Niosh-Approved Masks for Respiratory Protection

N95 Niosh-Approved Masks are masks that have obtained the mandatory safety standards for respirators in the United States. This standard can only be passed by the EPA (a federal agency that has passed the N95 standard).

All About N95 Niosh Approved Masks For Respiratory Protection

How does the N95 mask pass the American NIOSH standard?

N95 mask refers to the mask that passed the US NIOSH standard, but do you know how to pass it?

How does the N95 mask pass the American NIOSH standard?

The Difference, surgical face mask, n95 respirator face mask

Both n95 respirator face mask and surgical face mask are commonly used masks in medicine and can be used to protect against viruses. But their use environment is different, and their standards are different.

The Difference surgical face mask, n95 respirator face mask

The role of 3M KN95 face mask and wearing common sense

Masks are currently one of the most powerful weapons against COVID-19. Among them, the KN95 mask has become a product that everyone wants to buy. So do you know the KN95 mask? In 2020, under the unprecedented COVID-19, unprecedented human history has had a strong bond with the mask. This kind of special medical supplies masks that only a few people would use suddenly became a necessity for the daily life of the public.

The role of 3M KN95 face mask and wearing common sense

N95 face masks, introduction to various models of common sense

The N95 face mask has so many models, would you pick them? Can the mask have a breathing valve? 3M N95 face mask model inventory. What are N95, R95, and P95 face masks? What are the differences? How often do N95 face masks need to be replaced? Today I will do homework for 3M N95 face masks for you. Check out the differences between the functions of each model of 3M N95 face masks, and how to choose the one that suits you from each model of 3M N95 face masks.

N95 face masks, introduction to various models of common sense

N95 NIOSH-approved masks standard

The appearance of COVID-19 makes face masks a daily necessity in our lives. For face masks, we often hear n95 face masks, there is an approved standard for n95 face mask in the United States, do you know?

N95 NIOSH-approved masks standard

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The difference between the KN95 face mask and N95 face mask

What are the differences between Surgical face mask, KN95 face mask, and N95 face mask? Due to the occurrence of COVID-19, this issue has become a very concern for everyone.

1. What is the difference between the KN95 face mask, and the N95 face mask?

KN95 face mask: It is stipulated in Chinese norms and standards. According to Chinese norms and standards, masks can be divided into two categories: KN and KP. KN is suitable for filtering non-oily particles, and KP is suitable for filtering oily particles. The following figure is the percentage of filtration efficiency. KN95 face mask stipulates that the filtration efficiency for non-oily particles above 0.075 microns is greater than 95%.

N95 face mask: American NIOSH dust mask standard, non-oily particulate filtering efficiency ≥95%.

KN95 face mask and N95 face mask just have different names, and the masks produced according to these two standards have the same protection level. You can rest assured to buy any KN95 face mask or N95 face mask standard mask, there is no difference in protection effect.

2. Precautions for wearing the KN95 face mask and N95 face mask

1) Before wearing the KN95 face mask and N95 face mask, or during wearing a KN95 face mask and N95 face mask, avoid touching the inner side of the KN95 face mask and N95 face mask to reduce the contamination of KN95 face mask and N95 face mask may.

2) Distinguish the inside, outside, top, and bottom of the KN95 face mask and N95 face mask; the light color of the KN95 face mask and N95 face mask is inside; one end of metal strip/sponge strip is above KN95 face mask and N95 face mask.

3) Do not squeeze the KN95 face mask and an N95 face mask by hand. Including the KN95 face mask, you can only isolate the virus on the surface of the face mask. If you squeeze the face mask by hand, the virus will soak the face with the droplets. mask, there is still a chance of infection.

4) Make sure that the KN95 face mask and N95 face mask have good adhesion with the face. The simple test method is: after putting on the KN95 face mask and N95 face mask, exhale hard, and the air cannot leak out from the edges of the KN95 face mask and N95 face mask.

KN95 face mask and N95 face mask are not omnipotent, but wearing a KN95 face mask and N95 face mask correctly, often washing hands and disinfecting, can reduce the chance of infection!

No matter what kind of face mask, try not to bring it back, and do not reuse the face mask at the same time. It is also necessary to understand the correct way to wear the face mask. Only wear the face mask correctly to protect it!

3. Do KN95 face mask and N95 face mask need breathing valves?

KN95 face mask and N95 face mask are divided into two types with or without an exhalation valve. Whether there is an exhalation valve does not affect the respiratory protection of the wearer.

KN95 face mask and N95 face mask respirator may make the breathing of the wearer more difficult for people with chronic respiratory disease, heart disease or other diseases accompanied by symptoms of dyspnea, so use KN95 face mask equipped with an exhalation valve And N95 face mask can make them breathe easier and help reduce heat accumulation.

Simply put, the KN95 face mask and N95 face mask with exhalation valve can protect the wearer, but not the people around them.

If you are a virus carrier, please choose the KN95 face mask and N95 face mask without exhalation valve, do not spread the virus.

If you want to maintain a sterile environment, you can not use a KN95 face mask and N95 face mask with an exhalation valve, because the wearer may exhale bacteria or viruses.

4. How long can KN95 face mask and N95 face mask be used?

At present, the WHO has not made a clear conclusion about the best wearing time of the KN95 face mask and N95 face mask.

Some researchers have done research on the protection efficiency and wearing time of KN95 face mask and N95 face mask: the wearing efficiency of KN95 face mask and N95 face mask is 2 days, the filtration efficiency remains above 95%, and the respiratory resistance does not change much; wearing it for 3 days The filtration efficiency is reduced to 94.7%.

The recommendation given by the US CDC is that in the absence of sufficient supply of face masks, as long as the device is not obviously stained or damaged (such as creases or tears), it can be considered for reuse.

Special circumstances require timely replacement:

1) Breathing is difficult.
2) The face mask is damaged.
3) The face mask is contaminated.
4) There is odor in the face mask.
5) The face mask can no longer fit the face.

tips: Under the COVID-19, it is necessary to actively cooperate with wearing the KN95 face mask and N95 face mask.

Tags： KN95 face mask,N95 face mask,Surgical face mask,surgical mask,kn95 mask,N95 mask,N95 respirator mask,COVID-19,n95 niosh-approved masks
KN95 face mask, distinguish true and false method

Under the COVID-19, it is necessary to actively cooperate with wearing the KN95 face mask and N95 face mask. But do you know how to tell whether the KN95 face mask / N95 face mask is true or not?

1. Authentication and function of KN95 face mask / N95 face mask

KN95 face mask / N95 face mask are anti-particulate masks. The general name of anti-particulate mask products is 3M masks (3M is both the company’s name: Minnesota Mining Manufacturing Company and a registered trademark).

1. N95 face mask is one of 9 anti-particulate masks certified by NIOSH (National Institute of Occupational Safety and Health).

“N” means not suitable for oily particles (oil fumes produced by cooking are oily particles, and the droplets generated by people talking or coughing are not oily), so it can not be used to block oil fumes, but it can effectively prevent droplets, Viruses, and particles;
“95” means that the filtration efficiency reaches 95% under the detection conditions specified in the standard.

The KN95 face mask is in compliance with China’s mandatory GB 2626 standard.

2. N95 is not a specific product name. Rather, as long as it meets the N95 standard and has passed the NIOSH review, it can be called the “N95 face mask.”

2. How to distinguish the true and false of the KN95 face mask / N95 face mask?

1. No odor: First of all, the KN95 face mask / N95 face mask is a face mask with a relatively high protection level. It must be tasteless. Only the activated carbon mask has a slight fragrance of activated carbon, and the rubber band has no taste. If it is a bit smelly, it must be a fake or fake face mask.

2. Printed handwriting on face mask: Because KN95 face mask / N95 face mask is laser printed, the printed fonts have traces of laser corrosion, fake and shoddy products will not have this. In addition, the authentic KN95 mask will have KN95 on the outer surface, which is clearly visible.

3. Face mask packaging: If the font on the face mask packaging does not have light transmittance or the printing color has a color difference, it is definitely a fake and shoddy product. Is there the word GB2626-200 on the KN95 mask or packaging, which is the standard required by the country.

4. Quality of face mask: The regular KN95 face mask / N95 face mask will have deep impressions, and fake and inferior products will not have such deep impressions.

5. Medical information website query: You can go to the medical information website to check according to the detailed information or number information of the KN95 face mask / N95 face mask. It is true that there are remarks on the website for product information.

6. Inside the KN95 face mask / N95 face mask: There is really nothing printed inside the KN95 face mask / N95 face mask. At the same time, the breathing port is deep, and there will be a comfortable cotton pad at the nose.

7. Nose pads of KN95 face mask / N95 face mask: The genuine nose pads of KN95 face mask / N95 face mask are relatively thick and will not be deformed after being pressed down.

8. KN95 face mask / N95 face mask lock edge: The lock edges around the genuine KN95 face mask / N95 face mask are clearly visible, the depth is also deeper, and the lock edges around the fake are not clear.

9. KN95 face mask / N95 face mask straps: Genuine KN95 face mask / N95 face mask straps are pressed, not sewed, and will be tighter after being put on for the first time.

The above are 9 methods for distinguishing true and false by KN95 face mask / N95 face mask. If you want to know more about the KN95 face mask / N95 face mask, you can follow us.

Tags： KN95 face mask,N95 face mask,kn95 mask,N95 mask,3M,n95 niosh-approved masks
N95 face masks, introduction to various models of common sense

N95 face mask have so many models, would you pick them? Can the mask have a breathing valve? 3M N95 face mask model inventory.

What are N95, R95, and P95 face masks? What are the differences? How often do N95 face masks need to be replaced? Today I will do homework for 3M N95 face masks for you. Check out the differences between the functions of each model of 3M N95 face masks, and how to choose the one that suits you from each model of 3M N95 face masks.

1. What is the N95 face mask?

N95 face masks comply with NIOSH (National Institute of Occupational Safety and Health) standards and can filter 95% of non-oily particles with a diameter of 0.3 microns or more in the air. As long as they meet the N95 standard and pass the NIOSH review, the particulate filter mask respirator can be called the N95 face mask.

N95 face masks in the United States are mainly industrial protective masks, which are dust masks that meet NIOSH standards. For some dusty working environments, N95 face masks can prevent the inhalation of harmful airborne particles. N95 face masks are also good for mountain fire smoke pollution. Protective effect. If you want to do carpentry and mix cement at home, you may also consider wearing N95 face masks protection.

2. What are the differences between N95, R95, and P95 face masks?

N95 is one of NIOSH’s ratings for the protection standards of particulate filter mask respirators. “N” means Not resistant to oil, and “95” means that the filtration efficiency is 95% or more. In addition to 95, there are grades of N99 (filtration efficiency not less than 99%) and N100 (filtration efficiency not less than 99.97%).

“R” means Somewhat resistant to oil, “P” means Strongly resistant to oil/Oil-proof. Both R95 face masks and P95 face masks can filter 95% of non-oily particles and oily particles with a diameter of 0.3 microns or more in the air. The service life of R95 face masks is up to 8 hours, and the service life of P95 face masks can be up to 40 hours or 30 days. R series and P series masks also have R99/R100 and P99/P100 classification.

N95 is the standard of the United States. Other countries and regions in the world also have the same type of mask, but the name is different. For example, it is also called the KN95 face mask in China.

As can be seen from the above, N95 is actually the lowest standard among the 9 classifications formulated by NIOSH for the protection standards of dust masks.

3. What is the difference between N95 face masks and medical face masks?

Medical-surgical masks can isolate large particles such as droplets, and the outer layer is a waterproof layer that can block liquid splashes. However, surgical masks cannot effectively filter the fine particles in the air, and the design of surgical masks is not sealed, and it cannot completely prevent air from entering the gaps on the edges of the mask.

N95 face masks are particulate protective masks that can filter tiny particles with a diameter of more than 0.3 microns, but each time you wear an N95 face mask, you must test the tightness of the edges of the mask to ensure that there is no air leakage to have a real protective effect.

Industrial N95 face masks are mainly used when the air quality is not good. It can prevent or reduce the dust, pollen, and germs in the air from entering the human respiratory organs, such as preventing smog and PM2.5. N95 face masks can also filter bacteria and viruses with a diameter of 0.3 microns or more, so whenever a large epidemic infectious disease spreads, N95 face masks are also a popular choice for everyone.

But in fact, for the prevention of bacterial infections in the air such as influenza or Wuhan pneumonia, ordinary people choose medical surgical masks to be more cost-effective. First of all, N95 face masks can only block 95% of the particles, and wearing N95 face masks must also follow strict procedures. If they are used incorrectly, the protective effect will be greatly reduced. According to a study published in 2008 by the International Journal of Infectious Diseases, the correct use of masks can effectively reduce the spread of influenza virus infection. However, the use of P2 masks without gas density testing is not significantly different from the use of medical surgical masks.

And another study data shows that wearing only a mask has no preventive effect, but the combination of wearing a mask and washing hands frequently can reduce the chance of getting an influenza disease by 75%. Therefore, to prevent infection, the most important thing is to wash your hands frequently!

4. Is there any difference between different styles of N95 face masks?

N95 face masks have many different colors, shapes, and styles to choose from. Some shapes and styles can better fit some people’s facial shapes and will be more suitable for individuals.

According to CDC, as long as it is a product approved by NIOSH, used in an environment that meets the requirements of OSHA regulations, and the user wears a mask to test to ensure the gas density, then no matter what color, shape or style of N95 face mask, can achieve the same expectations The protective effect, that is, “the filtration efficiency of non-oily particles with a diameter greater than 0.3 microns in the air reaches more than 95%”.

5. How long can N95 face masks be worn?

According to the instructions on the 3M official website, the service life of N95face masks does not have a clear time limit, just saying “When the mask is dirty, damaged, or you feel difficulty breathing, you must leave the contaminated area and replace with a new mask.”

According to CDC instructions, practical experience shows that N95 face masks can be used continuously or intermittently within 8 hours to maintain the effect. Whether they can be used for a long time depends on whether the N95 face masks are dirty, whether they can continue to seal, and whether they affect smooth breathing; repeated use of N95 face masks is required Pay attention to the problem of cross-contamination, and because the circumstances are different, the maximum number of safe reuse of N95 face masks cannot be determined.

The CDC also stated that using N95 face masks for an extended period of time is better than taking them off and putting them on again, which can reduce the possibility of contamination. Especially in an environment where there are epidemic bacteria in the air, if the mask is removed, it is difficult to ensure that the bacteria will not adhere to the inside of the mask.

6. 3M N95 face mask selection guide

3M is a world-renowned American manufacturing company, formerly known as the Minnesota Mining and Manufacturing Company. It produces a lot of high-quality industrial products, as well as medical supplies and household products. I believe that every small partner has used several 3M products. The N95 face masks produced by 3M Company have NIOSH certification and have different styles and sizes.

Most protective masks will be clearly marked on the outside of the mask, which can be used to identify the model of the export mask, NIOSH certification, and other information.

1) N95-8210

The most common N95 face mask model on the market can filter at least 95% of solid or liquid non-oily particles with a diameter of 0.3 microns or more. The use of advanced electrostatic media technology can enhance the particle capture ability, while reducing breathing resistance, allowing the wearer to breathe more smoothly; the elastic band is welded to make it more durable, and the foam nose pad design makes it more comfortable to wear.

There is also an economical version of N95-8200 with equivalent functions; N95-8210plus, which uses a braided headband that is not easy to pull the hair to make wearing more comfortable; and the same product N95-8110S, which is more suitable for people with small faces.

2) N95-8210V

On the basis of 8210, a 3M Cool Flow breathing valve is added to make breathing (exhalation) easier, keep the face cool and reduce the accumulation of moisture inside the mask. N95 face masks with breathing valves are more comfortable to use in hot and humid environments and are also suitable for situations where masks need to be worn for a long time.

The principle of the one-way breathing valve is that the valve will be opened a little when exhaling to make the air easier to discharge, but when not breathing or inhaling, the valve will automatically seal tightly to maintain the protective effect. As for whether or not to worry about germs entering the open valve when the airflow is exchanged, it is a matter of opinion.

The more interesting CDC FAQ on N95 face masks, about whether medical institutions can use N95 face masks with breathing valves. The CDC believes that N95 face masks can be used when it is not necessary to maintain a sterile environment; however, the breathing valve allows unfiltered air to flow out, which will pollute the sterile environment, so it should not be used in sterile environments such as operating rooms for invasive surgery.

3) N95-8511

The most popular N95 face mask with a breathing valve on the market. The breathing valve can keep the inside of the mask cool. It is more suitable for hot and humid environments or when it needs to be worn for a long time. The braided headband and M-shaped nose clip improve comfort.

In addition, the overlay cushion design is added on the basis of 8511, and the soft inner layer provides an N95-8211 face mask for extra comfort.

4) N95-9210+ / 9211+

The Aura series N95 face masks adopt a folding three-sided three-dimensional structure design to reduce the problem of fogging of the glasses. The chin design is more convenient to wear face masks, positioning, and adjustment. It has an innovative breakthrough in portability and comfort. The 9210+ N95 face mask does not have a breathing valve, and the 9211+ version has a breathing valve.

5) N95-9105 / 9105S

The flex series is an economical version of the portable N95 face mask. The proprietary V-shaped fold design makes breathing easier and can bend with the movement of the mouth. It is more convenient to wear a mask to speak. There are two size options.

6) N95 face mask suitable for welding and metal casting

Welded and metal-cast N95 face masks all use fireproof materials, which can filter out metal fumes, and all are equipped with 3M Cool Flow breathing valves.

N95-8212: Anti-caking technology can reduce breathing resistance, which is beneficial for long-term wear and use; veneer cushion design is closer to the face to improve comfort, M-shaped nose clip is easier to adjust, and adjustable headband

N95-8214: Adding activated carbon adsorption layer on the basis of 8212, can filter ozone and harmful organic vapor.

N95-8515: Economical welded version of N95 face mask, M-shaped nose clip, braided headband design for added comfort.

7. R95 face mask and P95 face mask

As a professional protective product for harsh environments, R95 masks, and P95 masks can filter oily particles and non-oil particles. R series masks are resistant to oil mist; P series masks are oil resistant and can be used wherever protection is required in an oil environment.

R95-8240: Economical R95 face mask, anti-collapse shell design increases durability.

R95-8246: containing an activated carbon adsorption layer can filter acid gas.

R95-8247: The activated carbon adsorption layer can filter harmful organic vapors.

P95-8271: Equipped with a breathing valve, an M-shaped nose clip, and braided headband for increased wearing comfort.

P95-8576: P95 face mask for acid gas, equipped with a breathing valve, M-shaped nose clip, and a braided headband, comfortable and durable.

P95-8577: P95 face mask that can resist organic vapor, equipped with a breathing valve, M-shaped nose clip, and a braided headband, comfortable and durable.

8. Medical N95 face mask

Medical N95 face masks are more waterproof than other industrial N95 face masks. They are protective against the splashing and splashing of blood and other infectious liquids. They can block some airborne biological particles, which is in line with the CDC’s tuberculosis control guidelines. FDA approved as a surgical mask.

For the protection of bacterial germs, the protective effect of medical N95 face masks should be the best. However, it is not necessary for ordinary people to choose this type. It also has a certain blocking effect for a small amount of N95 industrial spray, and generally, everyone will not encounter a large amount of liquid splashing; it is likely to be caused by the use of electric medical equipment when performing surgery with a doctor Large particles and liquid splashes are different.

N95-1860: The most popular medical N95 face mask, traditional cup design.

N95-1870+: It adopts the foldable three-sided three-dimensional structure design to reduce the problem of fogging of the glasses and is portable and comfortable.

N95-1804/1805: Economical folding medical N95 face mask, very portable, 1805 is the old version, is being replaced by 1804, and 1805S and 1804S versions are suitable for small face people.

9. 3M N95 face mask recommended

The following is the 3M official website N95 face mask ~ P100 face mask model selection guide for your reference:

Are all the N95 face masks of the friends right? After reading the guide, I believe everyone has an understanding of the various types of N95 face masks, and don’t be so silly in the future!

Tags： N95 face mask,N95 face mask model,N95 face masks,R95 face masks,P95 face masks,medical face masks,3M N95 face mask,Medical N95 face mask,3M N95 face mask recommended,n95 niosh-approved masks
The role of 3M KN95 face mask and wearing common sense
Masks are currently one of the most powerful weapons against COVID-19. Among them, the KN95 mask has become a product that everyone wants to buy. So do you know the KN95 mask?

In 2020, under the unprecedented COVID-19, unprecedented human history has had a strong bond with the mask. This kind of special medical supplies masks that only a few people would use suddenly became a necessity for the daily life of the public.

1.KN95 face mask

1) what is the KN95 face mask?

KN95 masks and N95 masks are actually the same in terms of particle filtration efficiency.

The KN95 mask comes from the Chinese national standard GB2626-2006 “Respiratory protective equipment self-priming filter anti-particulate respirator”, N means Not resistant to oil, can be used to protect non-oily suspended particles; 95 means that the filtration efficiency is greater than or equal to 95%; KN95 means that the filtering performance of non-oily particulate matter reaches more than 95%, which can provide better protection in daily life.

KN95 masks are used in non-medical places to prevent various types of aerosol particles suspended in the air, including dust, smoke, and pathogenic microorganisms such as bacteria and viruses. KN95 masks are mainly of two types: breathing valve and no breathing valve. Among them, the breathing valve-less mask can effectively block the contamination of the surrounding environment by droplet bacteria discharged by the wearer of the mask, and the breathing valve mask does not have this function. So it is best to buy a mask without a breathing valve.

KN95 masks do not have the function of blocking the penetration of body fluids and cannot be used for medical operations, especially high-risk operations such as tracheotomy and tracheal intubation. KN95 masks may not be suitable for some frail or have cardiopulmonary diseases and are also not suitable for patients with respiratory problems with dyspnea.

2) who invented the KN95 face mask?

In 1720, when the outbreak of the French plague in Marseille was the worst, it was necessary to protect yourself by covering your face tightly with a cloth. Because it is too inconvenient to wrap the mouth and nose with cloth, people specially invented a mask similar to a bird’s beak for the doctor. This is probably the original mask.

After the 1870s, scientists gradually realized the existence of bacteria. In the 1890s, German bacteriologist Carl Flugge proposed that tuberculosis is spread in the air by droplets. According to this “saliva droplets are likely to spread disease”, surgeons put on masks for the first time in 1897.

These surgical masks are gradually spreading around the world, but their use is very limited, limited to the surgical room, and their role has been seriously underestimated. Until the autumn of 1910, a terrible plague swept northeast China. For the first time, masks showed their talents in epidemic prevention.

Soon after, in the Spanish influenza pandemic of 1918, people put on masks and further promote them.

In 1972, 3M developed the first KN95 face mask. The predecessor of 3M is actually a mining company. The reason why it actively develops protective masks is that mining workers also need masks to protect, which can reduce the occurrence of occupational pneumoconiosis. “N95” means that these masks can filter out at least 95% of the particles in the air.

3) what material is a KN95 face mask made from?

Masks are usually non-woven materials, all of which are made of polypropylene, and the KN95 face mask is no exception. It is an executive standard for the production of masks. The production materials are also non-woven fabrics, and the raw materials are also polypropylene. There are no other special The material is just a few more layers of filtering than ordinary masks.

Common medical masks are mainly composed of three layers of non-woven fabrics: the inner layer (hygroscopic layer) is a common non-woven fabric; the outer layer (water-blocking layer) is a non-woven fabric with a waterproof treatment, which is mainly used to isolate others from spraying The liquid droplets in the middle; the middle filter layer (core filter layer) is a polypropylene melt-blown nonwoven fabric that has been subjected to electret treatment, generally referred to as SMS structure (S for spunbond layer, M for meltblown layer).

In other words, the mask should be at least 3 layers, that is, 2 layers of Slayer and 1 layer of M layer. As a KN95 mask with a relatively high protection level, it is a 5-layer mask made of polypropylene non-woven SMMMS (2-layer S-layer and 3-layer M-layer) that can filter more than 95% of fine particles.

4)KN95 face mask sizes

The sizing differs with each mask model. Some of the sizing options include small, small/medium, medium, medium/large, and large.

5) KN95 face mask model

The KN95 face mask is divided into cup cover type, folding type, and so on from the appearance. This is mainly because of their different shapes, and their functions are basically the same. For non-oily particles such as bacteria and viruses, they can achieve more than 95% occlusion effect.

3M cup-type masks include: du8210 (8110S), 1860 (1860S), 8247, 9913V, 8822 and 8577, etc.

Folding masks, common 3M folding masks are: 9001 (V), 9002 (V), 9041, 9042, 9021, 9022, 9010, 9501, 9502, 9132, 9320, 9322, 9332 and so on.

The specific model can be found on the 3M official website.

2. The role of KN95 face mask

1) Can wear a KN95 face mask prevents COVID-19?

The new coronavirus can be spread through droplets, and the KN95 mask can protect the droplets well.

Because the droplets are mouth foams flying in the air, the particle size is much larger than the fine dust, the function of the mask is mainly to block rather than a filter.

2) Can KN95 face mask filter pm2.5?

The KN95 face mask can filter particulate matter and pm2.5 in the air.

3. KN95 face mask-wearing common sense

1) How to wear a KN95 face mask?
- Wash your hands and keep your hands clean;
- Select the KN95 face mask suitable for your face shape, hold the outer layer of the mask with one hand, and point the metal strip with your fingertips, with the metal strip side facing up, and cover the mouth, nose, and chin with the mask;
- Pull the upper headband over the top of the head and hang it on the back of the head. Pull the lower headband over the head and hang it under the neck and ears. People with long hair should hang the lower headband under their hair.
- Use both hands and fingers to move outward from the position of the bridge of the nose while pressing the metal bar, so that the nose is clamped against the bridge of the nose;
- Check the airtightness every time you wear the N95 mask, and cover the outside of the mask with both hands: if it is a version without a breathing valve, quickly exhale (positive pressure) to check for leaks at the edge of the mask; if it is with a breathing valve Version, you should quickly inhale (negative pressure) to check the leakage.
- If there is a leak, you need to readjust the position of the nose clip or mask. If you can’t seal it, you should replace the KN95 face mask that is more suitable for the face.
- When you need to remove the mask, you can first loosen the lower headband hanging around the neck around the top of the head, and then loosen the upper headband hanging on the back of the brain, so that your hands can avoid touching the outside of the mask and reduce contact with germs probability.
2) Can the KN95 face mask be used repeatedly?

In addition to the medical (infected area), 3M masks can be used multiple times until you feel that the breathing resistance is large, or the mask is contaminated.

The frequency of replacement varies from person to person and is mainly related to the concentration of external pollutants. The bigger the dust on the outside and the dirtier the air, the more and faster the sticking to the filter cotton. This naturally has to be changed more diligently.

3) If it is not opened, will the KN95 face mask expire?

The KN95 face mask is one of the anti-particle masks. It has good prevention of droplet infection caused by patients’ body fluids or blood splashes. It has a certain shelf life. Generally, the shelf life of the KN95 face mask is three years. In this process, as long as it is not intentionally destroyed, it can be used.

Generally speaking, the expired KN95 face mask is not recommended to be used again. Because of the expired KN95 face mask, the protective performance of the filter material has been greatly reduced, and it has been unable to effectively block the spread of the virus, and it is easy to increase infection after use. There is a risk of a virus, so once the KN95 face mask expires, it is not recommended to use it again.

4. KN95 face mask cleaning knowledge

1) Can the KN95 face mask be cleaned?

The KN95 face mask cannot be washed with water. The reason is that the electrostatic loading on the filter can absorb extremely small particles. After washing, the mask will destroy the filtering ability of the material, and the tightness cannot be guaranteed, which seriously affects the filtering effect.

A KN95 face mask is a maintenance-free disposable protective mask. The disposable here does not mean that it should be discarded once, but that it can be reused several times, but it cannot be cleaned. It is discarded when the breath is blocked or the mask is dirty. No longer use.

2) How to disinfect the KN95 face mask?

The outbreak of COVID-19 caused a shortage of personal masks and protective equipment. If we strictly follow the one-time abandonment requirements of masks, it is difficult to meet the needs of everyone wearing masks. In addition, if hundreds of millions of masks are discarded every day, it also constitutes a huge potential source of pollution, which can easily lead to the secondary transmission of COVID-19 and other influenza viruses, thereby further aggravating the risk of COVID-19 and other respiratory diseases.

How to disinfect, regenerate, and reuse protective equipment such as masks without reducing protection requirements has become an important and realistic demand?

Two methods are introduced here:

(1) Use an electric hair dryer to clean and disinfect disposable masks:
- Wrap the used disposable mask in a fresh-keeping bag to prevent the hot air from blowing away the contaminated pathogens, and also to avoid damaging the filter layer of the mask.
- Turn on the ordinary electric hair dryer of the home to the maximum level of the hot air, and carry out the hot air heating treatment about 10-20 cm above the mask.
- The experimental data shows that after 1 minute and 30 seconds, the temperature of the tuyere of the electric hair dryer can rise to 70 ℃ and continue to be maintained at this temperature.
- Continue to blow hot air for 30 minutes to inactivate the virus and restore the mask to the state before it was used. It can be reused again.
(2) Microwave disinfection and regeneration mask
- Look at the mask to see if there are metal, glue, etc. adhering to the sealing ring. If there is a second step if there is no third step.
- Disassemble the wire and remove the wire (without damaging the mask structure).
- Put the mask on the front of the microwave oven, if there is no adhesive such as glue, the maximum power is 700 watts (microwave high fire) for 2 minutes; if there is adhesive such as glue, 300 watts (40% maximum power, microwave medium fire), 4 minutes.
- Turn on the microwave oven, and after running for 2 minutes, let the mask (temperature about 30 degrees) cool down slightly.
- Put the back of the mask into the microwave oven, if there is no adhesive such as glue, the maximum power is 700 watts for 2 minutes; if there is adhesive such as 300 watts (medium), 4 minutes.
- After the radiation is finished, take out the mask. If there is a metal wire, stick it with glue or adhesive tape. The mask is resurrected and can be used again.
It is recommended that the number of mask recycling should not exceed 5 times. Masks of medical personnel who are at high risk of exposure are not recommended for resurrection. The longer the irradiation time, the more complete the virus inactivation, but the risk of filtering changes to the mask increases.

KN95 face mask must be supplied before COVID-19 has been resolved, understand that KN95 face mask can better protect yourself.

I hope the above content about the KN95 face mask can give you some help.
Tags： KN95 face mask,COVID-19,KN95 face mask wearing method,KN95 face mask disinfection,KN95 face mask invention,n95 niosh-approved masks