The masks that we often mention include kn95, N95, medical surgical masks, etc.

The first is the kn95 mask. According to the national standard gb2626-2006 "respiratory protective equipment self-priming filter type anti particulate respirator", masks are divided into kn and KP according to the efficiency level of filter elements. KP is suitable for filtering oily particles and kn is suitable for filtering non oily particles. The kn95 mask should have a filtration efficiency greater than or equal to 95% when it is tested with sodium chloride particles, that is, the filtration efficiency greater than or equal to 95% for non oily particles above 0.075 micron.

N95 mask is one of nine kinds of particle protective masks certified by NIOSH (National Institute of occupational safety and health). "N" means not resistant to oil. "95" means that the particle concentration inside the mask is more than 95% lower than that outside the mask when exposed to a specified number of special test particles.
According to the definition of YY 0469-2004 "technical requirements for medical surgical masks", medical surgical masks are "medical surgical masks worn by clinical medical staff in invasive operation environment, which provide protection for patients and medical staff carrying out invasive operation, prevent the spread of blood, body fluid and spatter, and are worn by medical staff at work". This kind of mask is used in clinic, laboratory, operating room and other medical environment. It is divided into waterproof layer, filter layer and comfort layer from outside to inside.

All products of Hebei Baota Medical Equipment Co., Ltd. are processed in strict accordance with the pharmaceutical industry standards to ensure that the bacterial filtration efficiency BFE is greater than or equal to 95%. The workshop is equipped with instrument room, ventilation resistance tester, synthetic blood penetration tester, filtration efficiency tester and other testing instruments to conduct a comprehensive inspection on the protective masks to ensure the quality of products. Every employee of the company is fully aware of the social responsibility on his shoulders, and makes every effort to ensure the quality and quantity of medical surgical masks and medical protective masks.