There are many brands of masks, such as 3M, Honeywell, Doelger, Nanhe, Twelve Officials, etc.

3M is not only the name of the company, but also a registered trademark. The anti-particle mask products sold by 3M in China are from different places of origin, and all of them have obtained the certification of Lao An (LA) in China in addition to the required certification of origin. ? "3M mask" refers to all products produced by 3M company that can be called masks. It is recommended that KN95 series 951V and 952V have breathing valves, one is ear-worn and the other is head-worn.

Honeywell

Honeywell is a diversified high-tech and manufacturing enterprise with a turnover of over $3 billion. The whole system is of KN95 protection level, and most of them are ear-worn. Just like 3M, it is also a breathing valve with letters in the model. ?

Doelger

Doelger Safety Equipment (China) Co., Ltd., a well-known (famous) medical equipment brand, started in 1889, is an international pioneer in medical and safety technology, an excellent supplier of medical equipment in the world, with strong technical force and perfect service system.

South Nuclear

Zhejiang Quzhou South Nuclear Special Labor Protection Products Technology Co., Ltd., South Nuclear, a well-known brand of security products, mainly includes gas and dust masks, protective gloves, goggles, masks, etc., formerly a subsidiary of China Nuclear Industry Ministry, has been a modern enterprise dedicated to the research and development of personal protective products, especially respiratory protective products.

Twelve Officers

Twelve Officers belong to Shanghai Dingya Biotechnology Co., Ltd., a subsidiary of Baodao Optical (Xingchuang Group). There are branches, warehousing and logistics centers and chain stores in Guangzhou, Huizhou, Inner Mongolia and Hunan. The overall scale has reached 15 people and is growing.

classification by protection grade

KN series:

KN1: the filtration efficiency is greater than 99.97% for non-oily particles above .75 micron

kn95: the filtration efficiency is greater than 95% for non-oily particles above .75 micron

kn9: the filtration efficiency is greater than 9% for non-oily particles above .75 micron

. The filtration efficiency of oily and non-oily particles above micron is greater than 99.97%

KP95: for oily and non-oily particles above .185 micron, the filtration efficiency is greater than 95%

KP9: for oily and non-oily particles above .185 micron, the filtration efficiency is greater than 9%

Extended information:

Applicable environment

Mainly. Industries that produce oily and non-oily particulate pollutants such as dust, smoke and fog with a diameter of more than .185 micron from organic chemicals, food processing, construction, decoration, petrochemicals and asphalt.

Baidu encyclopedia -KP1 mask