Filter efficiency of masks

This is one of the key technical requirements for dust masks, which characterizes the dust mask's ability to protect against particulate matter. According to the different protection objects, the dust filter masks are divided into KN and KP types. Among them, KN type filters are suitable for filtering non-oily particles, such as common sand and rock dust, and KP types are suitable for filtering Oily particles such as oil mist, coke oven smoke, etc. and non-oily particles.