ASTM F2100: testing scope and instrument selection

Conclusion The instruments described meet the requirements of ASTM F2100 by providing precise and repeatable testing conditions for face masks.

Instrument Specifications and ASTM F2100 Compliance The Face Mask Synthetic Blood Penetration Tester (TNG1044) is specifically designed to evaluate the synthetic blood penetration resistance of face masks, a critical requirement under ASTM F2100. This instrument features a blood spraying distance of (300 ± 10) mm, which aligns with the standard’s requirement for simulating real-world conditions where blood might be splashed onto a mask. The nozzle inner diameter of 0.84 mm ensures that the synthetic blood is delivered in a controlled and consistent manner, replicating the size and flow of actual bodily fluids. The spraying speed options of 450 cm/s, 550 cm/s, and 635 cm/s allow for testing under varying conditions, while the spraying time of 0.80 s, 0.66 s, and 0.57 s provides flexibility in simulating different exposure durations. The watching time of 10 seconds (adjustable) ensures that the test can be conducted for the required observation period to detect any penetration.

Bacterial Filtration Efficiency Testing The Masks Bacterial Filtration Efficiency Tester (TNG1047) is used to assess the ability of masks to filter out bacteria, another key criterion in ASTM F2100. The sample flow rate of A and B is 28.3 L/min, which is consistent with the standard’s requirement for testing under controlled airflow conditions. The spray flow of (8～10) L/min ensures that the bacterial particles are introduced into the airflow in a manner that mimics real-world exposure. The peristaltic pump flow of (0.1～3.0) mL/min allows for precise control over the amount of bacterial suspension introduced into the test environment. The front pressure of flow meter A of (-20～0) kPa ensures that the airflow remains within the specified range, maintaining the integrity of the test conditions.

Flammability Testing and Safety Compliance The 45 Degree Flammability Tester (TNG1062) is used to evaluate the flammability characteristics of face masks, a requirement under ASTM F2100. The time display and accuracy of 0 ~ 999.9 s, 0.1 s provide precise measurement of the flammability response, ensuring accurate and repeatable results. The ignition time of (1 ± 0.05) s ensures that the test is conducted under standardized conditions, allowing for consistent evaluation of flammability resistance. The distance from nozzle to specimen of 8 mm and the flame height of 16 mm (adjustable) ensure that the test simulates real-world flammability exposure. The **sample dimension of 150 * 50 mm** is designed to accommodate standard mask samples, ensuring compatibility with the testing process.