Views: 0 Author: Site Editor Publish Time: 2021-01-07 Origin: Site
The Centers for Disease Control and Prevention (CDC), the World Health Organization (WHO) and public health officials recommend wearing masks to control the spread of the new coronavirus, which can cause COVID-19. People now wear many different types of masks, including headscarves, hand-sewn masks and disposable medical masks. In many cases, the choice of mask depends on availability. People use what they have. But how effective are these masks?
Masks are usually a very humble product, but it has become one of the hot topics in this epidemic. Maybe some consumers have also learned about N95, KN95, P95, etc. during this epidemic. Let's learn about the US NIOSH certification standards and n95 mask specifications.
This passage is going to talk about sizes of n95 face mask:
Introduction to NIOSH
Types of n95 mask
Replace n95 masks
The National Institute for Occupational Safety and Health (NIOSH) National Institute of Occupational Safety and Health (NIOSH).
The "Occupational Safety and Health Act" of 1970 established NIOSH as a research institution, focusing on the safety and health of workers, and empowering employers and workers to create safe and healthy workplaces. NIOSH is part of the Centers for Disease Control and Prevention of the U.S. Department of Health and Human Services. Its mission is to ensure "safe and healthy working conditions for every man and woman in the country, and to protect our human resources." NIOSH has more than 1,300 employees from different fields, including epidemiology, medicine, nursing, and industrial hygiene. , Security, Psychology, Chemistry, Statistics, Economics and many engineering branches.
According to the filtering characteristics of the middle filter of the mask, it is divided into the following three types:
N series: N stands for Not resistant to oil, which can be used to protect non-oily suspended particles.
R series: R stands for Resistant to oil, which can be used to protect non-oily and oily suspended particles.
P series: P stands for oil Proof, which can be used to protect non-oily and oily suspended particles.
According to the lowest filtration efficiency of the filter material, masks can be divided into the following three levels:
Level 95: indicates that the minimum filtration efficiency is 95%.
99 level: indicates that the minimum filtration efficiency is 99%.
Level 100: Indicates that the minimum filtration efficiency is 99.97%.
The combination is N100, N99, N95, R100, R99, R95, P100, P99, P95. There are 9 kinds in total. In the actual testing process, NPPTL judges whether the applied mask meets the criteria of the applied classification based on different test material types (A, B, C three types) and test time.
When the following situations occur, the mask should be replaced in time:
When the respiratory impedance increases significantly;
When the mask is broken or damaged;
When the mask and the face cannot be closely attached;
The mask is contaminated (such as blood stains or droplets and other foreign objects);
The mask has been contaminated (used in individual wards or in contact with patients);
If it is a mask containing activated carbon, there is a peculiar smell in the mask;
When the mask has been used for longer than the recommended time.
The best-selling N95 mask on the Internet can achieve 95% filtering effect after testing. But for N95 masks, doctors remind citizens: “In theory, the more airtight the mask’s protective material, the better the effect of blocking particles. On the other hand, the more airtight the mask, the more difficult it is to breathe, especially for patients with cardiovascular diseases. Poor wear may also cause dizziness and difficulty breathing due to lack of oxygen. You must be more cautious when choosing to wear it."
We hope this article has helped you understand more about types of n95 mask. If you need n95 masks, do not hesitate to contact us. Our products will be your best choice.