|Product Name||3ply medical surgical face mask ear-loop|
|Material||Non-woven+ melt-blown layer + Non-woven|
|Feature||Plat with earth loop|
|Packing||According to the quantity|
|Color||White ,blue, green|
|Shipping time||3-7 days|
|Standard||Chinese standard YY0469-2011/EN14683:2019|
The bacterial filtration efficiency of the mask should not be less than 95%. (Same as the bacterial filtration efficiency in “YY 0469-2011 Medical-Surgical Mask”)
The gas flow rate in the bacterial filtration efficiency test at 28.3 L / min. The strain used was Staphylococcus aureus ATCC 6538, and the average particle diameter (MPS) of its bacterial aerosol was (3.0 ± 0.3) μm.
The ventilation resistance of the gas exchange on both sides of the mask should be no more than 49Pa / cm³.
The ventilation resistance test takes the center part of the mask for testing. The gas flow for the analysis needs adjustment to (8 ± 0.2) L / min; the diameter of the sample test area is 25 mm. The test sample test area is A. Use a differential pressure meter or equivalent equipment to measure the pressure difference between the two sides of the mask and calculate the ventilation resistance according to the formula ΔP = M / A.
ΔP-the pressure difference per square centimeter area of the test sample, the unit is Paper square centimeter (Pa / cm³);
M ——The differential pressure value of the test sample in Pa (Pa);
A ——Test area of test sample, unit is square centimeter.
Non-sterile masks should meet the following requirements:
Total bacterial colonies (CFU / g): ≤100;
Coliform bacteria, Pseudomonas, Staphylococcus aureus, hemolytic streptococci, and fungi.: Not detectable.
If the mask is sterilized or sterilized by ethylene oxide, the residual amount of ethylene oxide should not exceed 10 μg / g.eo.
Cytotoxicity: The cytotoxicity of the mask should not be higher than level 2.
Skin irritation: The primary irritation score of the mask should not be higher than 0.4.
Delayed-type hypersensitivity: The delayed-type hypersensitivity of masks should not be higher than level 1.