whole reusable breathing face mask cover protector washable with filter
Description
Filtering facepiece respirators (FFR), which are sometimes called disposable respirators, are subject to various regulatory standards around the world. These standards specify certain required physical properties and performance characteristics in order for respirators to claim compliance with the particular standard. During pandemic or emergency situations, health authorities often reference these standards when making respirator recommendations, stating, for example, that certain populations should use an "KN95, FFP2, or similar" respirator.This document is only intended to help clarify some key similarities between such references, specifically to the following FFR performance standards:
- KN95 (China GB2626-2006)
- N95 (United States-42CFR84)
- FFP2 (Europe EN 149-2001)
- P2 (Australia/New Zealand AS/NZA 1716:2012)
- Korea 1st class (Korea KMOEL - 2017-64)
- DS2 (Japan JMHLW-Notification 214, 2018)
As shown in the following summary table, respirators certified as meeting these standards can be expected to function very similarly to one another, based on the performance requirements stated in the standards and confirmed during conformity testing.
One notable comparison point is the flow rates specified by these standards for the inhalation and exhalation resistance tests. Inhalation resistance testing flow rates range from 40 to 160L/min. Exhalation resistance testing flow rates range from 30 to 95 L/min. Some countries require testing to be performed at multiple flow rates, others at only the high or low end of those ranges. Although this appears to suggest that the standards' requirements for breathing resistance (also called "pressure drop")
differ from each other, it's important to understand that pressure drop across any filter will naturally be higher at higher flow rates and lower at lower flow rates. Given typical pressure curves for respirator filters, the standards' various pressure drop requirements are actually quite similar. This chart shows a representative filter pressure drop curve. If one filter is tested at a high flow rate, the pressure drop performance will be relatively high. If that same filter is tested at a low flow rate, the pressure drop performance will be relatively low.
Based on this comparison, it is reasonable to consider China KN95, AS/NZ P2, Korea 1st Class, and Japan DS2 FFRs as "similar" to US N95 and European FFP2 respirators, for filtering non-oil-based particles such as those resulting from wildfires, PM 2.5 air pollution, volcanic eruptions, or bioaerosols (e.g. viruses). However, prior to selecting a respirator, users should consult their local respiratory protection regulations and requirements or check with their local public health authorities for selection guidance.
Certification/ Class (Standard) | N95 (-42C FR84) | FFP2 (EN 149-2001) | KN95 (GB2626-20 06) | P2 (AS/NZ 1716:2012) | Korea 1st Class (KMOEL - 2017-64) | DS2 (Japan JMHLW- Notification 214, 2018) |
| Filter performance - (must be ≥ X% efficient) | ≥ 95% | ≥ 94% | ≥ 95% | ≥ 94% | ≥ 94% | ≥ 95% |
| Test agent | NaCl | NaCl and paraffin oil | NaCl | NaCl | NaCl and paraffin oil | NaCl |
| Flow rate | 85 L/min | 95 L/min | 85 L/min | 95 L/min | 95 L/min | 85 L/min |
| Total inward leakage (TIL)* - tested on human subjects each performing exercises | N/A | ≤ 8% leakage (arithmetic mean) | ≤ 8% leakage (arithmetic mean) | ≤ 8% leakage (individual and arithmetic mean) | ≤ 8% leakage (arithmetic mean) | Inward Leakage measured and included in User Instructions |
| Inhalation resistance - max pressure drop | ≤ 343 Pa | ≤ 70 Pa (at 30 L/min) ≤ 240 Pa (at 95 L/min) ≤ 500 Pa (clogging) | ≤ 350 Pa | ≤ 70 Pa (at 30 L/min) ≤ 240 Pa (at 95 L/min) | ≤ 70 Pa (at 30 L/min) ≤ 240 Pa (at 95 L/min) | ≤ 70 Pa (w/valve) ≤ 50 Pa (no valve) |
| Flow rate | 85 L/min | Varied - see above | 85 L/min | Varied - see above | Varied - see above | 40 L/min |
| Exhalation resistance - max pressure drop | ≤ 245 Pa | ≤ 300 Pa | ≤ 250 Pa | ≤ 120 Pa | ≤ 300 Pa | ≤ 70 Pa (w/valve) ≤ 50 Pa (no valve) |
| Flow rate | 85 L/min | 160 L/min | 85 L/min | 85 L/min | 160 L/min | 40 L/min |
| Exhalation valve leakage requirement | Leak rate ≤ 30 mL/min | N/A | Depressurizatio n to 0 Pa ≥ 20 sec | Leak rate ≤ 30 mL/min | visual inspection after 300 L /min for 30 sec | Depressurizatio n to 0 Pa ≥ 15 sec |
| Force applied | -245 Pa | N/A | -1180 Pa | -250 Pa | N/A | -1,470 Pa |
| CO2 clearance requirement | N/A | ≤ 1% | ≤ 1% | ≤ 1% | ≤ 1% | ≤ 1% |
Definitions
Filter performance - the filter is evaluated to measure the reduction in concentrations of specific aerosols in air that passes through the filter.Test agent - the aerosol that is generated during the filter performance test.
Total inward leakage (TIL) - the amount of a specific aerosol that enters the tested respirator facepiece via both filter penetration and faceseal leakage, while a wearer performs a series of exercises in a test chamber.
Inward leakage (IL)- the amount of a specific aerosol that enters the tested respirator facepiece, while a wearer performs a normal breathing for 3 minutes in a test chamber. The test aerosol size (count median diameter) is about 0.5 micro meter.
Pressure drop - the resistance air is subjected to as it moves through a medium, such as a respirator filter.
IMPORTANT: Always read and follow respirator user instructions.
Company information
Dongguan FangDaSheng(FDS) Technology Co., Ltd. was established in Dongguan in 2019. in order to take social responsibility and combat the epidemic situation, just truth responded to the call of the government. With years of full accumulation and technology precipitation in the intelligent manufacturing industry, just truth quickly depolyed all forces to complete the construction of dust free and sterile purification factory in a short period of time, which can meet the requirements of GMP 100000 degree purification standard.
FDS manufacturer is ready and able to retool to help in producing critically needed mask supplies-KN95 And Medical Disposable face mask.
KN95 Mask Details
Our Mask is with highest quality(raw material control, high-tech testing machine control, sterilization machine for steriling mask.5layers. with most cheapest price but highest quality and capability.
Product information
KN95 Face Masks are recommended for use in any situation where protection of the respiratory system is required. This includes during outbreaks of Avian Flu etc (as recommended by the WHO).
Easy and practical, fix to the face with elastic for complete comfort and confidence throughout manicures, pedicures and more. KN95 face masks are designed to filter out a minimum of 95% of particles, with 5 layers of fabric which make the filtration system highly effective.
The FDS offers the following information regarding the use of the masks:
- The metal part of the KN95 mask goes above the bridge of your nose and all lettering upright.
- If you are using the N95 mask, the foam should be on the bridge if your nose and all lettering upright If your mask has one colored side, that colored side should face out.
- Masks are effective only when used in combination with frequent hand-cleaning with alcohol-based hand rub or soap and water for at least 20 seconds.
- Before putting on a mask, clean hands with alcohol-based hand rub or soap and water for at least 20 seconds
- Cover mouth and nose with mask and make sure there are no gaps between your face and the mask
- Avoid touching the mask while using it; if you do, clean your hands with alcohol-based hand rub or soap and water for at least 20 seconds
- Replace the mask with a new one as soon as it is damp and do not re-use single-use masks
- To remove the mask: Take it off from behind (do not touch the front of mask); discard immediately in a closed bin; clean hands with alcohol-based hand rub or soap and water for at least 20 seconds
- The mask is re-usable, however it must be replaced if it becomes wet or moist
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