• Does the latest national PM2.5 test of CNS 15980:2017 have classing? Suggestions for wearing at all levels?
    The protective effect of PM2.5 mask can be divided into four classes: A, B, C and D. According to the PM2.5 concentration in the environment, the applicable PM2.5 concentration values (μg/m3) are <350/<230/<140/<70, respectively. Suggestions for wearing PM2.5 mask level are provided.

  • What is the latest national standard of CNS 15980:201 for PM2.5 testing Class A/B/C/D?
       

    ※Protection Efficiency : refers to the protective effect of the mask against granular substances, mainly to test the Protection Efficiency of the mask. The higher the protection efficiency degree, the better the protection
    ※ Method A: the filtration efficiency is tested by the single particle size which is the most difficult to capture.
    ※ Method B: The filtration efficiency of particles with different particle sizes was measured, and then the average value was obtained. It is better to filter them based on the filtering principle since sizes may be different. Therefore, the standard of method B will be higher than that of method A.
    ※     Inhalation & Exhalation Resistance: it is the pressure drop of the general medical masks, which means that the air permeability of the masks will affect the breathing smoothness. Generally speaking, the efficiency is proportional to the pressure drop. The better the efficiency is, the higher the pressure drop is. The design of the pressure drop is also different because PM2.5 smog-proof masks are used in a different environment from those of the general medical-grade ones and the tightness tests are added at the same time.
  • How to buy a qualified PM2.5 mask?
    In addition to confirming whether the masks have passed the Taiwan National Qualification Standard of CNS 15980 “Performance Indexes and Test Methods of anti-smog (PM2.5) Masks”, the following three points are the key points for selecting qualified PM2.5 masks:
    1.  Please check the package for “PM2.5 smog-proof mask” and “pass CNS 15980 test”
    2. Check: at least 6 items CNS 15980 must be passed to ensure the protective power of masks
    3. Class: CNS 15980 divides PM2.5 masks into four classes: A, B, C and D. Different PM2.5 concentrations require different classes of masks. Please pay attention not to wearing the wrong class of masks, which will affect the protection force