After a long I am back with extension of the face mask/surgical mask tests & Test Methods.
In previous blog had discussed on Bacterial or Viral Filtration Efficiency (BFE/VFE) testing of Face /Surgical Mask.
Today we will discuss on another essential Test that is called
Micron particulate filtration efficiency Test 0.1μ -(PFE)
Definition -The Particle Filtration Efficiency (PFE) test evaluates the nonviable particle retention or filtration efficiency of filter media and other filtration devices at sub-micron levels.
This test is performed on face masks and all filter material that allows 1 cubic foot per minute (CFM) flow to pass through it.
Normally above testing equipment should comply testing method as per
IS 16289: 2014 or equivalent ASTM/ISO/EN / standards
Filtered and dry air is passed through an atomizer to produce an aerosol containing suspended latex spheres. This aerosol is then passed through a charge neutralizer.
The aerosol is then mixed and diluted with additional pre-conditioned air to produce a stable, neutralized and dried aerosol of latex spheres to be used in the efficiency test.
Equipment -Micron particulate filtration efficiency Tester
Aerosol test system consisting of clean, dry compressed air supply, HEPA filters, aerosol generator, charge neutralizer, humidifier, test filter holder and duct assembly, pressure drop measuring device, air flow rate measuring device, temperature and humidity detectors and optical particle counters.
It is device to determine the sub-micron particulate filtration efficiency of mask. It is widely used in quality control, research and development, certification, manufacturing or testing industry, etc. Micro-computer-controlled system, Multi-point calibration, Equipped with aerosol generator.