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The N95 respirator is one of nine types of respirator approved by the National Institute for Occupational Safety and Health (NIOSH). "N" means not suitable for oily particles (soot from cooking is oily particles, while droplets from talking or coughing are not oily); "95" refers to a filtration efficiency of 95% under NIOSH standard testing conditions. N95 is not a specific product name. As long as the product meets the N95 standard and passes the NIOSH review, it can be called an N95 mask.
 
Ii. Classification of NIOSH and 9 types of anti-particulate matter masks
 
NIOSH: The National Institute for Occupational Safety and Health (NIOSH) is an internationally renowned and important research Institute for Occupational Safety and Health. Make recommendations on prevention of work-related injuries and illnesses. The institute is part of the CENTERS for Disease Control and Prevention of the U.S. Department of Health and Human Services.
 
NIOSH classifies its certified particulate respirators into 9 categories according to Department of Health and Human Services (HHS) regulation "42 CFR Part 84." The certification is conducted by the National Personal Protective Technology Laboratory (NPPTL) under NIOSH.
 
According to the filtering characteristics of the middle filter screen of the mask, it can be divided into the following three types:
 
N series: N stands for Not resistant to oil, which can be used to protect non-oily suspended particles.
R series: R stands for Resistant to oil, which can be used to protect non-oily and oily suspended particles.
P series: P stands for oil Proof, which can be used to protect non-oily and oily suspended particles.
 
Masks can be classified into the following three grades according to the minimum filtering efficiency of the filter material:
 
Grade 95: indicates a minimum filtration efficiency of 95%.
Grade 99: indicates a minimum filtration efficiency of 99%.
Grade 100: indicates a minimum filtration efficiency of 99.97%.
 
That's N100, N99, N95, R100, R99, R95, P100, P99, P95. A total of 9. In the actual testing process, NPPTL determines whether the applied mask meets the applied classification criteria based on different test materials (class A,B,C) and test time.

Iii. N95 application process
 
For manufacturers applying for N95 for the first time, the application is divided into two stages:
 
Phase one. Submit a questionnaire (provided by NPPTL) and photos (factory appearance, product line, etc.) to NPPTL for evaluation. After NPPTL passes the evaluation, NPPTL will give the manufacturer an enterprise code and other relevant information. The first stage is completed. The first phase will take about three weeks to one month to complete from the start of submission.
 
Phase two. After the completion of phase 1 and receipt of the documents from NPPTL, prepare the detailed application materials. In addition to filling in the standard forms, enterprises should also provide the following materials that meet the requirements of the standard:
 
Pre-test data,
Drawings,
Assembly Matrix,
Draft approval labels,
QA manual,
Process Quality Control Plan,
Service Life Plan,
The User 's Instructions,
Test samples and Hardware.
 
The test fee shall be paid in advance along with the submission of materials. If the submitted materials are not qualified, NPPTL will require rectification and re-supply. Everything is going well. The second phase will take about 3-4 months from the date of submission.
 
After a manufacturer receives N95 certification, NIOSH conducts annual spot checks on the manufacturer's certified products on the market to determine whether the manufacturer consistently meets N95 requirements.
 
Iv. Notes for N95 application
 
1. The N95 certificate will only be issued to the entity that can control the design of the product. Only the manufacturer and designer (OEM by others) can apply. Neither the importer nor any distributor can be the beneficiary of the N95 certificate, that is, the N95 certificate will not be issued to them, either for secondary conversion or for their reapplication (for the manufacturer's products).
 
Manufacturers can apply for N95 by themselves, or entrust professional consulting companies to handle it for them.
 
2, N95 certification charges by model, the more model the more expensive, the specific classification is determined by NPPTL evaluation, that is to say, if the manufacturer provides a series of models, there are several smaller models below, NPPTL may require the manufacturer to divide the model into details, thus increasing the cost.

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