9% five Chinese national standard GB6223-86 UDC 614. 2. The National Institute of Occupational Safety and Health (NIOSH) New Dust Respiratory Protection Standard:
promulgated on June 8, 1995 (according to the classification of filter media) N series: protection of non-oily suspended particles without time limit Particles and sweaty oily suspended particles have a time limit of 8 hours.894: above all testing standards Tested with a particle size of 0. When the carrier of some particles is oily, and these substances are attached to the electrostatic nonwoven fabric, it will reduce the electrical properties and make it small.97% (referred to as 95, 99, 100), so there are 9 small categories of filter materials.. European Union EN149 standard: FFP1: minimum filtration effect> 80% FFP2: minimum filtration effect> 94%
FFP3: minimum filtration effect> 97% Third, Australian AS1716 standard: Yuan Jianhua, chairman of Guangzhou Byfair, said that wearing these masks, PM 2. Better sex'. Yuan Jianhua introduced that when purchasing PM 2.5 is like ' 'Flies fly into big holes' come and go freely.5 protective masks, the public should try not to choose masks made of gauze or artificial textile materials, but should choose masks with high-quality filter materials and sealing rings. However, a survey shows that the size, number of layers, and tightness of most masks on the market do not play a role in protecting PM 2. Air pollution is closely related to the occurrence of respiratory diseases, especially lung cancer.Professor Zhou Rong of the Guangzhou Respiratory Disease Research Institute said that everyone breathes more than 20,000 times a day. Dr.5 94% P3: minimum filter effects, '99% Fourth, Japan's
MOL certification standards: DS1: DS2: minimum filter effects,' 99% DS3: minimum filter effects, '99.5L/min. The dust penetrates, so the filter material for preventing oil and gas sol should undergo special electrostatic 3-Layer Face Mask Factory treatment to achieve the purpose of preventing fine dust.1.
So each series is divided into 3 levels: 95%, 99%, 99. my country's national standard uses a suspended particle size of <90% of 5 microns and <70% of 2 microns, with a flow rate of 42.3 microns, the EU standard detection flow rate is 95L/min, and the US standard is 85L/min. P series: protection of non-oily suspended particles and sweaty oily suspended particles without time limit
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