防颗粒物口罩的用途是帮助减少空气中可吸入颗粒物进入人体呼吸系统。
The intended use of a respirator is to help reduce the wearers exposure to airborne particles that could be inhaled and enter the human respiratory system.
在美国,防颗粒物口罩必须根据其呼吸防护的有效性,来获得美国国家职业安全卫生研究所的鉴定认证。最常见的一种便是NIOSH N95口罩,它可以过滤掉95%的直径介于0.1至0.3微米之间的微粒。也就是说这种口罩可以有效过滤灰尘、花粉以及PM2.5。
In the US, to qualify as a certified respirator, the mask must be approved by National Institute for Occupational Safety and Health as to its respiratory protection efficiency. One of the most common respirator masks is NIOSH N95, which filters at least 95 percent of particles with diameters ranging from 0.1 to 0.3 m. That means the respirator is effective against dust, pollen and PM2.5.
还等啥?为了健康,口罩一定要选对,快行动起来吧!
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