3 Ply Face Mask

Name of Test:

Bacterial Filtration Efficiency (BFE) of Medical Face Mask Sample Materials, using a Biologicat Aerosol

of Staphylococcus aureus by ASTM: F 2't01 - 19

Test Organism Used:

Staphylococcus aureus - ATCC 6538

lnoculum Size:

2.00 x loBcFU/ mt

Test Equipment:

Aerosol chrillenge Apparatus with Nebulizer assembly and Cascade impactor

Flow Rate of Cascade lmpactor:

28.3 L / min

Aerosol Size:

3 microns t 0.5

Procedure:

Test sample was clamped between cascade impactor and an aerosol chamber at a distance of 15 cms. Bacterial

aerosol of bacteria - Staphylococcus aureus were generated in the chamber using the nebulizer assembly. Aerossls

of test organisms of size 3 microns were drawn through the test material using a vacuum attached to cascade

impactor. Positive control samples collected aerosol with no test specimen to determine the upstream aerosol counts.

The ratio of upstream to down stream was reported as Percentage Bacterial Filtration efFciency. Following results are

the Average of three readings.

Results:

Sample ldentification Average Bacterial count BFE (Percentage)

3 Ply Face Mask

1* layer: Polypropylene Spun Bond nonwoven22to 25 GSM

. 2no layer: SMMS 25, gsm spun melt hydrophobic white

3'o layer; Polypropylene spun n Bond nonwoven 22 to 25 Gsm

20 99.31

Positive Control 2.90 x 103 N. A,

INTERPRETATION:

Mask sample labeled as 3 Ply Face Mask lst layer: Polypropylene Spun Bond nonwoven 22lo 25 GSM 2nd layer:

SMMS 25, gsm spun melt hydrophobic white 3d layer: Polypropylene spun tr Bond nonwoven 22 to 25 Gsm has

exhibited 99.3{ % Bacterial Filtration Efficiency when analysed as per ASTM: F 2101 - t9 standard