Masks Resistance to Penetration with Synthetic Blood testing
The ASTM F1862 / F1862M standard is a standard developed by the American Testing and Materials Authority (ASTM). The full name of this standard is as follows: ASTM F1862 / F1862M - 17 Standard test method for the resistance of medical face masks to synthetic blood penetration (horizontal projection of constant volume at known rate).
Said test method describes a test method for evaluating the resistance of the mask against synthetic blood penetration, which is useful in ranking the penetration resistance performance of medical face masks. However, this test method does not define acceptable penetration resistance levels. Because this determination has to be made according to the specific application and conditions of the enterprises. Therefore, when using this test method to make claims about the performance of medical face masks, it should be explained under what conditions the test is performed.
Such medical face masks are intended to counteract splashing, fluid penetration of blood, body fluids, and other potentially infectious agents. During the design of these masks, many factors such as surface tension, viscosity and polarity of the fluid, as well as the structure of the materials and relative hydrophilicity or hydrophobicity are taken into account. The surface tension range for body fluids other than blood and saliva is on average from 0.042 to 0.060 N / m. The resulting surface tension of synthetic blood is around 0.042 N / m.
During the test, the synthetic blood mixture is painted with a red dye to help determine visually, and a thickening agent is used to simulate the flow properties of the blood.
During a medical procedure, a blood vessel can puncture and the resulting high blood flow can affect the protective face mask. The rate of effect may depend on many factors, but the main factor is the patient's blood pressure.
Within the scope of protective clothing tests, ASTM F1862 / F1862M Medical face masks with synthetic blood penetration resistance test services are also provided to our businesses by our organization.