Detailed explanation of the pocket filter filtration principle

Filter inertia and diffusion particles dust in the airflow for inertial motion, when encountering the arrangement of disordered fibers, the airflow change direction, particles due to inertia deviated from the direction, hit the fiber, and be bonded, the larger the particles easier to hit, the better the effect.

Small particles of dust for irregular Brownian motion, the smaller the particles, the more intense the irregular motion, the more chances of hitting the obstacles, the better the filtering effect will be, the air less than 0.1-micron particles mainly for Brownian motion, small particles, good filtering effect.

Particles larger than 0.3 microns are mainly for inertial motion, the larger the particles, the higher the efficiency, diffusion, and inertia are not obvious to the most difficult to-filter-out particles, measuring the performance of high-efficiency filters, people often specify the measurement of the most difficult to measure the dust efficiency value.

The electrostatic effect of the F8 class bag filter is due to some reason, the fibers and particles may be charged, producing an electrostatic effect. The filtration effect of electrostatically charged filter materials can be significantly improved.

The reason: static electricity makes the dust change its trajectory and hit the obstacles, static electricity makes the dust stick to the media more firmly, materials that can carry static electricity for a long time are also called "electret" materials, the resistance of the material with static electricity remains unchanged, the filtering effect will be significantly improved, static electricity does not play a decisive role in the filtering effect, but only plays a secondary role.