FFP3类别口罩的检测,无论是欧洲标准还是美国标准,均指定用美国TSI-8130 Automated FilterTesters仪器进行检测。美国标准N类用NaCl法,R类用DOP法,欧洲标准用DOP法。
TSI-8130仪器用NaCl法:仪器可以自动产生盐粒子,粒子的平均直径为0.2μm(聚集平均直径0.26μm,算术平均直径0.07μm)经设定在一定流量下通过试样,仪器自动打印出流量、阻力、透过率。
DOP法,使用DOP油发尘,DOP油粒子直径为聚集平均粒径0.33μm,计数平均直径0.20μm。
不同的FFP3类别口罩使用的过滤材料不同。过滤效果一方面和颗粒物粒径有关,还受颗粒物是否含油的影响。FFP3类别口罩通常要按照过滤效率分级,并按是否适合过滤油性颗粒物分类。不含油的颗粒物如粉尘、水基雾、漆雾、不含油的烟(焊接烟)、微生物等。“非油性颗粒物”的过滤材料虽比较常见,但它们不适合油性颗粒物,如油雾、油烟、沥青烟、焦炉烟等。而适合油性颗粒物的过滤材料也可用于非油性颗粒物。
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The inspection of FFP3 masks, whether it is a European standardor an American standard, specifies the use of the US TSI-8130Automated Filter Testers instrument for testing. American standardN type uses NaCl method, R type uses DOP method, European standarduses DOP method.
The TSI-8130 instrument uses the NaCl method: the instrument canautomatically generate salt particles. The average diameter of theparticles is 0.2 μm (the average diameter of the aggregate is 0.26μm, the average diameter of the arithmetic is 0.07 μm). Theinstrument automatically prints out through the sample at a certainflow rate. Flow rate, resistance, transmittance.
In the DOP method, DOP oil is used for dust generation. Thediameter of the DOP oil particles is the aggregate average particlediameter of 0.33 μm, and the count average diameter is 0.20 μm.
Different FFP3 masks use different filter materials. Thefiltering effect is related to the particle size of the particleson the one hand, and is also affected by whether the particlescontain oil. FFP3 category masks are usually classified accordingto filtration efficiency, and classified according to whether theyare suitable for filtering oily particulate matter. Oil-freeparticulate matter such as dust, water-based mist, paint mist,oil-free smoke (welding smoke), microorganisms, etc. Although"non-oily particulates" filter materials are relatively common,they are not suitable for oily particulates, such as oil mist, oilsmoke, asphalt smoke, coke oven smoke, etc. Filter materialssuitable for oily particulates can also be used for non-oilyparticulates. The cup-type valved FFP3 mask has obtained the whitelist of the Ministry of Commerce, the US EUA white list, thenational standard test report, the EU ce certification FFP3, pleasecontact FFP3杯状带阀KN95,KN95口罩FFP3,FFP3口罩工厂