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Test Standards For Protective Clothing and Masks :ASTM F1670 VS ASTM F1862
ASTM F1670 is based on Test Method F903 for measuring resistance of chemical protective clothing materials to penetration by liquids. This test method is normally used to evaluate specimens from individual finished items of protective clothing and individual samples of materials that are candidates for items of protective clothing.ASTM F1670 is normally used to evaluate specimens from individual finished items of protective clothing and individual samples of materials that are candidates for items of protective clothing.
Medical protective clothing materials are intended to be a barrier to blood, body fluids, and other potentially infectious materials. Many factors can affect the wetting and penetration characteristics of body fluids, such as surface tension, viscosity, and polarity of the fluid, as well as the structure and relative hydrophilicity or hydrophobicity of the materials.
This test method uses visual observation rather than analytical measurements for determination of penetration, use this test method as a preliminary evaluation for possible penetration of blood and other body fluids. Perform subsequent testing with a microbiological challenge and analytical technique using Test Method F1671.
ASTM F1862 offers a procedure for evaluating medical face mask resistance to synthetic blood penetration that is useful in establishing claims for penetration resistance performance of medical face masks and ranking their performance.
Medical face masks are intended to resist liquid penetration from the splatter or splashing of blood, body fluids, and other potentially infectious materials. Many factors affect the wetting and penetration characteristics of body fluids, such as surface tension, viscosity, and polarity of the fluid, as well as the structure and relative hydrophilicity or hydrophobicity of the materials and the design of the mask itself.
This test method involves the preconditioning of specimen medical face masks in a relatively high humidity environment (85 ± 5% relative humidity at 21 ± 5°C [70 ± 10°F]) to simulate the conditions of use when the wearer creates high humidity conditions by breathing through the mask. This preconditioning does not account for saturation of the interior medical face mask layer.
2020-04-27 16:32
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