How to Test method of protective clothing material penetration tester
time：2021-02-02 10:15Browse：118Times
Resistance range of Protective Clothing Material Penetration Tester
1.1 This test method is used to evaluate the permeability resistance of medical masks under the impact of small volume (〜2 mL) high-speed synthetic blood flow.
1.2 This test method is not applicable to all forms or conditions of blood-borne pathogen exposure. Users of the test method must look at the face exposure and evaluate whether the test method is suitable for their specific application.
1.3 This test method is mainly aimed at the performance of materials or some material structures used in medical masks. This test method cannot solve the design, structure or interface performance of the medical mask or other factors that may affect the overall protection of the medical mask and its operation (such as filtration efficiency and pressure drop).
1.4 This test method does not solve the air permeability of the medical mask material or any other characteristics that affect the breathing comfort of the medical mask. This test method evaluates medical masks as protective clothing.
This test method does not evaluate the performance of medical masks in air transmission or in preventing the penetration of atomized body fluids deposited on medical masks.
Test method of Anti Synthetic blood penetration tester
2.1 Distribute a certain amount of synthetic blood on the specimen mask from a set distance through the pneumatic valve to simulate the impact (splash) of blood or other body fluids on the specimen. The velocity and volume of the fluid are set to simulate a given medical protocol.
2.2 Any evidence that synthetic blood penetrates into the inner surface of the medical mask (the side contacting the wearer's face) constitutes a fault. The result is reported as pass/fail.
2.3 Evaluate specimen medical masks at the speed of 450, 500 and 635 cm/s. These correspond to the speed of leaving arteriole puncture at human blood pressure of 10.7, 16.0 and 21.3 kPa(80, 120 and 160 mmHg).
The test results are reported at each speed or corresponding pressure, and the medical mask is rated as the corresponding highest blood pressure, so the medical mask specimen shows an acceptable quality limit of 4.0.
