How to choose and use respiratory protection properly
2, masks according to the national standard and large, medium and small three models.
3, masks are divided into one-time, double half mask and full face mask.
The protective effect of the mask depends on the leakage rate of the mask body and the face and the protection rate of the filter cotton.
If you want good protective effect, in principle, the purchase of low leakage rate of half-face mask with KP100 / KN100 grade filter cotton can achieve effective protection effect.
High haze or harmful dust environment, it is recommended to choose a high protection rate of the mask. Different brand models are not the same, but the certification level, leakage rate, respiratory resistance is the final reference to select the mask data. Now the mask fully uses the principle of electrostatic adsorption, even the KN100 level, KP100 level masks, and some use double-sided, double-piece design, breathing is also smooth. Especially silicone masks, although the high unit price, due to long service life, the use of low cost.
Dust masks now perform GB2626-2006 <Self-priming filter-type particulate respirator> standard.
1, according to the standard, the mask is divided into oil-resistant particulate and non-oily particles 2 kinds of masks.
Anti-oil particles (anti-fumes, oil mist and non-oily particles) protection class KP100, KP95, KP90 three grades.
Anti-oil particles (anti-dust, smoke, fog, microorganisms) have KN100, KN95, KN90 three grades. The number represents the protection rate for ultrafine particles. The bigger the better.
