The TLV Pocket Note in the US Government Industrial Health Society provides the exact limit of full-closed protective clothing heatstroke, which can also obtain the same information from the OSHA website. However, the effects of physical effects on protectiveness are not considered, such as wear, flexing fatigue, puncture, tear, and do not consider the performance degradation caused by previous pollution. PM2. “N” means “notresistanttooil”.5 microns and below, which can enter the lungs, which is very China Protective Mask harmful to the human body.
As air pollution is serious, everyone’s demand for dust masks is getting bigger and bigger. At present, the name of the dust mask on the market is full, which is labeled with PM2. 95% of this value is not average, but the minimum, so the average value of the actual product is set to 99%. NiSH certified other anti-granulated dust masks also include: N99, N100, R95, R99, R100, P95, P99, P100, which can cover N95’s protection range, where “R” means, suitable for oily or Non-oil-based particles, if used for oil-based particulate matter, the use time is no more than 8 hours; “P” means, suitable for oily or non-oil-based granules, if used for oily particulate matter, use time should follow manufacturers’ recommendations.
The N95 authentication number is issued in line with this test. The N95 dust mask is one of NiSHs developed in 1995. “95” indicates that the particle concentration in the mask is 95% lower than that of the mask.3 micron particles, the barrier efficiency must reach 99. In addition, when the N100, P100, the R100 three dust masks are tested with 0. .5 dust masks are atmospheric particles with a diameter of 2.7%, N99, P99, and R99 are all over 99%, while N95, P95, R95 are The filtration rate is over 95%.7%.
“R” represents “ResistantTOOIL”, “P” represents “Oilproof”, “99” in the capture rate is indicated in 99%, “100” is indicated in 99.5 and N95. According to the oil resistance is divided into “n”, “r”, “p”, divided into “95”, “99” and “100” according to the capture rate.5 and N95 will be introduced below.
Therefore, the N95 dust mask is tested by 0. “99” and “100” refer to the level of filtering efficiency. Here is what PM2.3 microfride of sodium chloride particles, and the barrier rate must reach more than 95%, and when the wearer’s face is tested, it is ensured that the air can pass the mask
Tags: China Protective Mask
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